course.lib.php 150 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490491492493494495496497498499500501502503504505506507508509510511512513514515516517518519520521522523524525526527528529530531532533534535536537538539540541542543544545546547548549550551552553554555556557558559560561562563564565566567568569570571572573574575576577578579580581582583584585586587588589590591592593594595596597598599600601602603604605606607608609610611612613614615616617618619620621622623624625626627628629630631632633634635636637638639640641642643644645646647648649650651652653654655656657658659660661662663664665666667668669670671672673674675676677678679680681682683684685686687688689690691692693694695696697698699700701702703704705706707708709710711712713714715716717718719720721722723724725726727728729730731732733734735736737738739740741742743744745746747748749750751752753754755756757758759760761762763764765766767768769770771772773774775776777778779780781782783784785786787788789790791792793794795796797798799800801802803804805806807808809810811812813814815816817818819820821822823824825826827828829830831832833834835836837838839840841842843844845846847848849850851852853854855856857858859860861862863864865866867868869870871872873874875876877878879880881882883884885886887888889890891892893894895896897898899900901902903904905906907908909910911912913914915916917918919920921922923924925926927928929930931932933934935936937938939940941942943944945946947948949950951952953954955956957958959960961962963964965966967968969970971972973974975976977978979980981982983984985986987988989990991992993994995996997998999100010011002100310041005100610071008100910101011101210131014101510161017101810191020102110221023102410251026102710281029103010311032103310341035103610371038103910401041104210431044104510461047104810491050105110521053105410551056105710581059106010611062106310641065106610671068106910701071107210731074107510761077107810791080108110821083108410851086108710881089109010911092109310941095109610971098109911001101110211031104110511061107110811091110111111121113111411151116111711181119112011211122112311241125112611271128112911301131113211331134113511361137113811391140114111421143114411451146114711481149115011511152115311541155115611571158115911601161116211631164116511661167116811691170117111721173117411751176117711781179118011811182118311841185118611871188118911901191119211931194119511961197119811991200120112021203120412051206120712081209121012111212121312141215121612171218121912201221122212231224122512261227122812291230123112321233123412351236123712381239124012411242124312441245124612471248124912501251125212531254125512561257125812591260126112621263126412651266126712681269127012711272127312741275127612771278127912801281128212831284128512861287128812891290129112921293129412951296129712981299130013011302130313041305130613071308130913101311131213131314131513161317131813191320132113221323132413251326132713281329133013311332133313341335133613371338133913401341134213431344134513461347134813491350135113521353135413551356135713581359136013611362136313641365136613671368136913701371137213731374137513761377137813791380138113821383138413851386138713881389139013911392139313941395139613971398139914001401140214031404140514061407140814091410141114121413141414151416141714181419142014211422142314241425142614271428142914301431143214331434143514361437143814391440144114421443144414451446144714481449145014511452145314541455145614571458145914601461146214631464146514661467146814691470147114721473147414751476147714781479148014811482148314841485148614871488148914901491149214931494149514961497149814991500150115021503150415051506150715081509151015111512151315141515151615171518151915201521152215231524152515261527152815291530153115321533153415351536153715381539154015411542154315441545154615471548154915501551155215531554155515561557155815591560156115621563156415651566156715681569157015711572157315741575157615771578157915801581158215831584158515861587158815891590159115921593159415951596159715981599160016011602160316041605160616071608160916101611161216131614161516161617161816191620162116221623162416251626162716281629163016311632163316341635163616371638163916401641164216431644164516461647164816491650165116521653165416551656165716581659166016611662166316641665166616671668166916701671167216731674167516761677167816791680168116821683168416851686168716881689169016911692169316941695169616971698169917001701170217031704170517061707170817091710171117121713171417151716171717181719172017211722172317241725172617271728172917301731173217331734173517361737173817391740174117421743174417451746174717481749175017511752175317541755175617571758175917601761176217631764176517661767176817691770177117721773177417751776177717781779178017811782178317841785178617871788178917901791179217931794179517961797179817991800180118021803180418051806180718081809181018111812181318141815181618171818181918201821182218231824182518261827182818291830183118321833183418351836183718381839184018411842184318441845184618471848184918501851185218531854185518561857185818591860186118621863186418651866186718681869187018711872187318741875187618771878187918801881188218831884188518861887188818891890189118921893189418951896189718981899190019011902190319041905190619071908190919101911191219131914191519161917191819191920192119221923192419251926192719281929193019311932193319341935193619371938193919401941194219431944194519461947194819491950195119521953195419551956195719581959196019611962196319641965196619671968196919701971197219731974197519761977197819791980198119821983198419851986198719881989199019911992199319941995199619971998199920002001200220032004200520062007200820092010201120122013201420152016201720182019202020212022202320242025202620272028202920302031203220332034203520362037203820392040204120422043204420452046204720482049205020512052205320542055205620572058205920602061206220632064206520662067206820692070207120722073207420752076207720782079208020812082208320842085208620872088208920902091209220932094209520962097209820992100210121022103210421052106210721082109211021112112211321142115211621172118211921202121212221232124212521262127212821292130213121322133213421352136213721382139214021412142214321442145214621472148214921502151215221532154215521562157215821592160216121622163216421652166216721682169217021712172217321742175217621772178217921802181218221832184218521862187218821892190219121922193219421952196219721982199220022012202220322042205220622072208220922102211221222132214221522162217221822192220222122222223222422252226222722282229223022312232223322342235223622372238223922402241224222432244224522462247224822492250225122522253225422552256225722582259226022612262226322642265226622672268226922702271227222732274227522762277227822792280228122822283228422852286228722882289229022912292229322942295229622972298229923002301230223032304230523062307230823092310231123122313231423152316231723182319232023212322232323242325232623272328232923302331233223332334233523362337233823392340234123422343234423452346234723482349235023512352235323542355235623572358235923602361236223632364236523662367236823692370237123722373237423752376237723782379238023812382238323842385238623872388238923902391239223932394239523962397239823992400240124022403240424052406240724082409241024112412241324142415241624172418241924202421242224232424242524262427242824292430243124322433243424352436243724382439244024412442244324442445244624472448244924502451245224532454245524562457245824592460246124622463246424652466246724682469247024712472247324742475247624772478247924802481248224832484248524862487248824892490249124922493249424952496249724982499250025012502250325042505250625072508250925102511251225132514251525162517251825192520252125222523252425252526252725282529253025312532253325342535253625372538253925402541254225432544254525462547254825492550255125522553255425552556255725582559256025612562256325642565256625672568256925702571257225732574257525762577257825792580258125822583258425852586258725882589259025912592259325942595259625972598259926002601260226032604260526062607260826092610261126122613261426152616261726182619262026212622262326242625262626272628262926302631263226332634263526362637263826392640264126422643264426452646264726482649265026512652265326542655265626572658265926602661266226632664266526662667266826692670267126722673267426752676267726782679268026812682268326842685268626872688268926902691269226932694269526962697269826992700270127022703270427052706270727082709271027112712271327142715271627172718271927202721272227232724272527262727272827292730273127322733273427352736273727382739274027412742274327442745274627472748274927502751275227532754275527562757275827592760276127622763276427652766276727682769277027712772277327742775277627772778277927802781278227832784278527862787278827892790279127922793279427952796279727982799280028012802280328042805280628072808280928102811281228132814281528162817281828192820282128222823282428252826282728282829283028312832283328342835283628372838283928402841284228432844284528462847284828492850285128522853285428552856285728582859286028612862286328642865286628672868286928702871287228732874287528762877287828792880288128822883288428852886288728882889289028912892289328942895289628972898289929002901290229032904290529062907290829092910291129122913291429152916291729182919292029212922292329242925292629272928292929302931293229332934293529362937293829392940294129422943294429452946294729482949295029512952295329542955295629572958295929602961296229632964296529662967296829692970297129722973297429752976297729782979298029812982298329842985298629872988298929902991299229932994299529962997299829993000300130023003300430053006300730083009301030113012301330143015301630173018301930203021302230233024302530263027302830293030303130323033303430353036303730383039304030413042304330443045304630473048304930503051305230533054305530563057305830593060306130623063306430653066306730683069307030713072307330743075307630773078307930803081308230833084308530863087308830893090309130923093309430953096309730983099310031013102310331043105310631073108310931103111311231133114311531163117311831193120312131223123312431253126312731283129313031313132313331343135313631373138313931403141314231433144314531463147314831493150315131523153315431553156315731583159316031613162316331643165316631673168316931703171317231733174317531763177317831793180318131823183318431853186318731883189319031913192319331943195319631973198319932003201320232033204320532063207320832093210321132123213321432153216321732183219
  1. <?php
  2. /* For licensing terms, see /license.txt*/
  3. /**
  4. * This is the course library for Chamilo.
  5. *
  6. * All main course functions should be placed here.
  7. *
  8. * Many functions of this library deal with providing support for
  9. * virtual/linked/combined courses (this was already used in several universities
  10. * but not available in standard Chamilo).
  11. *
  12. * The implementation changed, initially a course was a real course
  13. * if target_course_code was 0 , this was changed to NULL.
  14. * There are probably some places left with the wrong code.
  15. *
  16. * @package chamilo.library
  17. */
  18. /*
  19. DOCUMENTATION
  20. (list not up to date, you can auto generate documentation with phpDocumentor)
  21. CourseManager::get_real_course_code_select_html($element_name, $has_size=true, $only_current_user_courses=true)
  22. CourseManager::check_parameter($parameter, $error_message)
  23. CourseManager::check_parameter_or_fail($parameter, $error_message)
  24. CourseManager::course_code_exists($wanted_course_code)
  25. CourseManager::get_real_course_list()
  26. CourseManager::get_virtual_course_list()
  27. GENERAL COURSE FUNCTIONS
  28. CourseManager::get_access_settings($course_code)
  29. CourseManager::set_course_tool_visibility($tool_table_id, $visibility)
  30. CourseManager::get_user_in_course_status($user_id, $course_code)
  31. CourseManager::add_user_to_course($user_id, $course_code)
  32. CourseManager::get_virtual_course_info($real_course_code)
  33. CourseManager::is_virtual_course_from_visual_code($visual_code)
  34. CourseManager::is_virtual_course_from_system_code($system_code)
  35. CourseManager::get_virtual_courses_linked_to_real_course($real_course_code)
  36. CourseManager::get_list_of_virtual_courses_for_specific_user_and_real_course($user_id, $real_course_code)
  37. CourseManager::has_virtual_courses_from_code($real_course_code, $user_id)
  38. CourseManager::get_target_of_linked_course($virtual_course_code)
  39. TITLE AND CODE FUNCTIONS
  40. CourseManager::determine_course_title_from_course_info($user_id, $course_info)
  41. CourseManager::create_combined_name($user_is_registered_in_real_course, $real_course_name, $virtual_course_list)
  42. CourseManager::create_combined_code($user_is_registered_in_real_course, $real_course_code, $virtual_course_list)
  43. USER FUNCTIONS
  44. CourseManager::get_real_course_list_of_user_as_course_admin($user_id)
  45. CourseManager::get_course_list_of_user_as_course_admin($user_id)
  46. CourseManager::is_user_subscribed_in_course($user_id, $course_code)
  47. CourseManager::is_user_subscribed_in_real_or_linked_course($user_id, $course_code)
  48. CourseManager::get_user_list_from_course_code($course_code)
  49. CourseManager::get_real_and_linked_user_list($course_code);
  50. GROUP FUNCTIONS
  51. CourseManager::get_group_list_of_course($course_code)
  52. CREATION FUNCTIONS
  53. CourseManager::attempt_create_virtual_course($real_course_code, $course_title, $wanted_course_code, $course_language, $course_category)
  54. */
  55. /* INIT SECTION */
  56. /**
  57. * Configuration files
  58. */
  59. require_once api_get_path(CONFIGURATION_PATH).'add_course.conf.php';
  60. /**
  61. * Libraries (we assume main_api is also included...)
  62. */
  63. require_once api_get_path(LIBRARY_PATH).'database.lib.php';
  64. require_once api_get_path(LIBRARY_PATH).'add_course.lib.inc.php';
  65. /**
  66. * Constants definition
  67. */
  68. //LOGIC: course visibility and registration settings
  69. /*
  70. COURSE VISIBILITY
  71. MAPPING OLD SETTINGS TO NEW SETTINGS
  72. -----------------------
  73. NOT_VISIBLE_NO_SUBSCRIPTION_ALLOWED
  74. --> COURSE_VISIBILITY_REGISTERED, SUBSCRIBE_NOT_ALLOWED
  75. NOT_VISIBLE_SUBSCRIPTION_ALLOWED
  76. --> COURSE_VISIBILITY_REGISTERED, SUBSCRIBE_ALLOWED
  77. VISIBLE_SUBSCRIPTION_ALLOWED
  78. --> COURSE_VISIBILITY_OPEN_PLATFORM, SUBSCRIBE_ALLOWED
  79. VISIBLE_NO_SUBSCRIPTION_ALLOWED
  80. --> COURSE_VISIBILITY_OPEN_PLATFORM, SUBSCRIBE_NOT_ALLOWED
  81. */
  82. //OLD SETTINGS
  83. define('NOT_VISIBLE_NO_SUBSCRIPTION_ALLOWED', 0);
  84. define('NOT_VISIBLE_SUBSCRIPTION_ALLOWED', 1);
  85. define('VISIBLE_SUBSCRIPTION_ALLOWED', 2);
  86. define('VISIBLE_NO_SUBSCRIPTION_ALLOWED', 3);
  87. /**
  88. * Variables
  89. */
  90. $TABLECOURSE = Database::get_main_table(TABLE_MAIN_COURSE);
  91. $TABLECOURSDOMAIN = Database::get_main_table(TABLE_MAIN_CATEGORY);
  92. $TABLEUSER = Database::get_main_table(TABLE_MAIN_USER);
  93. $TABLECOURSUSER = Database::get_main_table(TABLE_MAIN_COURSE_USER);
  94. $TABLEANNOUNCEMENTS = 'announcement';
  95. $coursesRepositories = $_configuration['root_sys'];
  96. /**
  97. * CourseManager Class
  98. * @package chamilo.library
  99. */
  100. class CourseManager {
  101. /**
  102. * Returns all the information of a given coursecode
  103. * @param string $course_code, the course code
  104. * @return an array with all the fields of the course table
  105. * @author Patrick Cool <patrick.cool@UGent.be>, Ghent University
  106. */
  107. public static function get_course_information($course_code) {
  108. return Database::fetch_array(Database::query(
  109. "SELECT * FROM ".Database::get_main_table(TABLE_MAIN_COURSE)."
  110. WHERE code='".Database::escape_string($course_code)."'"),'ASSOC'
  111. );
  112. }
  113. /**
  114. * Returns all the information of a given coursecode
  115. * @param int the course id
  116. * @return an array with all the fields of the course table
  117. */
  118. public static function get_course_information_by_id($course_id) {
  119. return Database::select('*', Database::get_main_table(TABLE_MAIN_COURSE), array('where'=>array('id = ?' =>intval($course_id))),'first');
  120. }
  121. /**
  122. * Returns a list of courses. Should work with quickform syntax
  123. * @param integer Offset (from the 7th = '6'). Optional.
  124. * @param integer Number of results we want. Optional.
  125. * @param string The column we want to order it by. Optional, defaults to first column.
  126. * @param string The direction of the order (ASC or DESC). Optional, defaults to ASC.
  127. * @param string The visibility of the course, or all by default.
  128. * @param string If defined, only return results for which the course *title* begins with this string
  129. */
  130. public static function get_courses_list($from = 0, $howmany = 0, $orderby = 1, $orderdirection = 'ASC', $visibility = -1, $startwith = '') {
  131. $sql = "SELECT * FROM ".Database::get_main_table(TABLE_MAIN_COURSE)." ";
  132. if (!empty($startwith)) {
  133. $sql .= "WHERE title LIKE '".Database::escape_string($startwith)."%' ";
  134. if ($visibility !== -1 && $visibility == strval(intval($visibility))) {
  135. $sql .= " AND visibility = $visibility ";
  136. }
  137. } else {
  138. $sql .= "WHERE 1 ";
  139. if ($visibility !== -1 && $visibility == strval(intval($visibility))) {
  140. $sql .= " AND visibility = $visibility ";
  141. }
  142. }
  143. if (!empty($orderby)) {
  144. $sql .= " ORDER BY ".Database::escape_string($orderby)." ";
  145. } else {
  146. $sql .= " ORDER BY 1 ";
  147. }
  148. if (!in_array($orderdirection, array('ASC', 'DESC'))) {
  149. $sql .= 'ASC';
  150. } else {
  151. $sql .= Database::escape_string($orderdirection);
  152. }
  153. if (!empty($howmany) && is_int($howmany) and $howmany > 0) {
  154. $sql .= ' LIMIT '.Database::escape_string($howmany);
  155. } else {
  156. $sql .= ' LIMIT 1000000'; //virtually no limit
  157. }
  158. if (!empty($from)) {
  159. $from = intval($from);
  160. $sql .= ' OFFSET '.Database::escape_string($from);
  161. } else {
  162. $sql .= ' OFFSET 0';
  163. }
  164. return Database::store_result(Database::query($sql));
  165. }
  166. /**
  167. * Returns the access settings of the course:
  168. * which visibility;
  169. * wether subscribing is allowed;
  170. * wether unsubscribing is allowed.
  171. *
  172. * @param string $course_code, the course code
  173. * @todo for more consistency: use course_info call from database API
  174. * @return an array with int fields "visibility", "subscribe", "unsubscribe"
  175. */
  176. public static function get_access_settings($course_code) {
  177. return Database::fetch_array(Database::query(
  178. "SELECT visibility, subscribe, unsubscribe from ".Database::get_main_table(TABLE_MAIN_COURSE)."
  179. WHERE code = '".Database::escape_string($course_code)."'")
  180. );
  181. }
  182. /**
  183. * Returns the status of a user in a course, which is COURSEMANAGER or STUDENT.
  184. * @param int User ID
  185. * @param string Course code
  186. * @return int the status of the user in that course
  187. */
  188. public static function get_user_in_course_status($user_id, $course_code) {
  189. $result = Database::fetch_array(Database::query(
  190. "SELECT * FROM ".Database::get_main_table(TABLE_MAIN_COURSE_USER)."
  191. WHERE course_code = '".Database::escape_string($course_code)."' AND user_id = ".Database::escape_string($user_id))
  192. );
  193. return $result['status'];
  194. }
  195. /**
  196. * Unsubscribe one or more users from a course
  197. *
  198. * @param mixed user_id or an array with user ids
  199. * @param int session id
  200. * @param string course code
  201. *
  202. */
  203. public static function unsubscribe_user($user_id, $course_code, $session_id = 0) {
  204. if (!is_array($user_id)) {
  205. $user_id = array($user_id);
  206. }
  207. if (count($user_id) == 0) {
  208. return;
  209. }
  210. $table_user = Database :: get_main_table(TABLE_MAIN_USER);
  211. if (!empty($session_id)) {
  212. $session_id = intval($session_id);
  213. } else {
  214. $session_id = intval($_SESSION['id_session']);
  215. }
  216. //Cleaning the $user_id variable
  217. if (is_array($user_id)) {
  218. $new_user_id_list = array();
  219. foreach($user_id as $my_user_id) {
  220. $new_user_id_list[]= intval($my_user_id);
  221. }
  222. $new_user_id_list = array_filter($new_user_id_list);
  223. $user_ids = implode(',', $new_user_id_list);
  224. } else {
  225. $user_ids = intval($user_id);
  226. }
  227. $course_code = Database::escape_string($course_code);
  228. $course = Database::fetch_object(Database::query("SELECT db_name FROM ".Database::get_main_table(TABLE_MAIN_COURSE)."
  229. WHERE code = '".$course_code."'"));
  230. // Unsubscribe user from all groups in the course.
  231. Database::query("DELETE FROM ".Database::get_course_table(TABLE_GROUP_USER, $course->db_name)."
  232. WHERE user_id IN (".$user_ids.")");
  233. Database::query("DELETE FROM ".Database::get_course_table(TABLE_GROUP_TUTOR, $course->db_name)."
  234. WHERE user_id IN (".$user_ids.")");
  235. // Erase user student publications (works) in the course - by André Boivin
  236. //@todo field student_publication.author should be the user id
  237. $table_course_user_publication = Database :: get_course_table(TABLE_STUDENT_PUBLICATION, $course->db_name);
  238. $sqlu = "SELECT * FROM $table_user WHERE user_id IN (".$user_ids.")";
  239. $resu = Database::query($sqlu);
  240. $username = Database::fetch_array($resu,'ASSOC');
  241. $userfirstname = $username['firstname'];
  242. $userlastname = $username['lastname'];
  243. $publication_name = $userfirstname.' '.$userlastname ;
  244. $sql = "DELETE FROM $table_course_user_publication WHERE author = '".Database::escape_string($publication_name)."'";
  245. Database::query($sql);
  246. // Unsubscribe user from all blogs in the course.
  247. Database::query("DELETE FROM ".Database::get_course_table(TABLE_BLOGS_REL_USER, $course->db_name)."
  248. WHERE user_id IN (".$user_ids.")");
  249. Database::query("DELETE FROM ".Database::get_course_table(TABLE_BLOGS_TASKS_REL_USER, $course->db_name)."
  250. WHERE user_id IN (".$user_ids.")");
  251. //Deleting users in forum_notification and mailqueue course tables
  252. $sql_delete_forum_notification = "DELETE FROM ".Database::get_course_table(TABLE_FORUM_NOTIFICATION, $course->db_name)." WHERE user_id IN (".$user_ids.")";
  253. Database::query($sql_delete_forum_notification);
  254. $sql_delete_mail_queue = "DELETE FROM ".Database::get_course_table(TABLE_FORUM_MAIL_QUEUE, $course->db_name)." WHERE user_id IN (".$user_ids.")";
  255. Database::query($sql_delete_mail_queue);
  256. // Unsubscribe user from the course.
  257. if (!empty($session_id)) {
  258. // Delete in table session_rel_course_rel_user
  259. Database::query("DELETE FROM ".Database::get_main_table(TABLE_MAIN_SESSION_COURSE_USER)."
  260. WHERE id_session ='".$session_id."' AND course_code = '".Database::escape_string($_SESSION['_course']['id'])."' AND id_user IN ($user_ids)");
  261. foreach ($user_id as $uid) {
  262. // check if a user is register in the session with other course
  263. $sql = "SELECT id_user FROM ".Database::get_main_table(TABLE_MAIN_SESSION_COURSE_USER)." WHERE id_session='$session_id' AND id_user='$uid'";
  264. $rs = Database::query($sql);
  265. if (Database::num_rows($rs) == 0) {
  266. // Delete in table session_rel_user
  267. Database::query("DELETE FROM ".Database::get_main_table(TABLE_MAIN_SESSION_USER)."
  268. WHERE id_session ='".$session_id."' AND id_user='$uid' AND relation_type<>".SESSION_RELATION_TYPE_RRHH."");
  269. }
  270. }
  271. // Update the table session
  272. $row = Database::fetch_array(Database::query("SELECT COUNT(*) FROM ".Database::get_main_table(TABLE_MAIN_SESSION_USER)."
  273. WHERE id_session = '".$session_id."' AND relation_type<>".SESSION_RELATION_TYPE_RRHH." "));
  274. $count = $row[0]; // number of users by session
  275. $result = Database::query("UPDATE ".Database::get_main_table(TABLE_MAIN_SESSION)." SET nbr_users = '$count'
  276. WHERE id = '".$session_id."'");
  277. // Update the table session_rel_course
  278. $row = Database::fetch_array(@Database::query("SELECT COUNT(*) FROM ".Database::get_main_table(TABLE_MAIN_SESSION_COURSE_USER)." WHERE id_session = '$session_id' AND course_code = '$course_code' AND status<>2" ));
  279. $count = $row[0]; // number of users by session and course
  280. $result = @Database::query("UPDATE ".Database::get_main_table(TABLE_MAIN_SESSION_COURSE)." SET nbr_users = '$count' WHERE id_session = '$session_id' AND course_code = '$course_code' ");
  281. } else {
  282. Database::query("DELETE FROM ".Database::get_main_table(TABLE_MAIN_COURSE_USER)."
  283. WHERE user_id IN (".$user_ids.") AND relation_type<>".COURSE_RELATION_TYPE_RRHH." AND course_code = '".$course_code."'");
  284. // add event to system log
  285. $time = time();
  286. $user_id = api_get_user_id();
  287. event_system(LOG_UNSUBSCRIBE_USER_FROM_COURSE, LOG_COURSE_CODE, $course_code, $time, $user_id);
  288. }
  289. }
  290. /**
  291. * Subscribe a user to a course. No checks are performed here to see if
  292. * course subscription is allowed.
  293. * @param int User ID
  294. * @param string Course code
  295. * @param int Status (STUDENT, COURSEMANAGER, COURSE_ADMIN, NORMAL_COURSE_MEMBER)
  296. * @return bool True on success, false on failure
  297. * @see add_user_to_course
  298. */
  299. public static function subscribe_user($user_id, $course_code, $status = STUDENT, $session_id = 0) {
  300. if ($user_id != strval(intval($user_id))) {
  301. return false; //detected possible SQL injection
  302. }
  303. $course_code = Database::escape_string($course_code);
  304. if (empty ($user_id) || empty ($course_code)) {
  305. return false;
  306. }
  307. if (!empty($session_id)) {
  308. $session_id = intval($session_id);
  309. } else {
  310. $session_id = intval($_SESSION['id_session']);
  311. }
  312. $status = ($status == STUDENT || $status == COURSEMANAGER) ? $status : STUDENT;
  313. $role_id = ($status == COURSEMANAGER) ? COURSE_ADMIN : NORMAL_COURSE_MEMBER;
  314. // A preliminary check whether the user has bben already registered on the platform.
  315. if (Database::num_rows(@Database::query("SELECT status FROM ".Database::get_main_table(TABLE_MAIN_USER)."
  316. WHERE user_id = '$user_id' ")) == 0) {
  317. return false; // The user has not been registered to the platform.
  318. }
  319. // Check whether the user has not been already subscribed to the course.
  320. if (empty($session_id)) {
  321. if (Database::num_rows(@Database::query("SELECT * FROM ".Database::get_main_table(TABLE_MAIN_COURSE_USER)."
  322. WHERE user_id = '$user_id' AND relation_type<>".COURSE_RELATION_TYPE_RRHH." AND course_code = '$course_code'")) > 0) {
  323. return false; // The user has been already subscribed to the course.
  324. }
  325. }
  326. if (!empty($session_id)) {
  327. // Check whether the user has not already been stored in the session_rel_course_user table
  328. if (Database::num_rows(@Database::query("SELECT * FROM ".Database::get_main_table(TABLE_MAIN_SESSION_COURSE_USER)."
  329. WHERE course_code = '".$_SESSION['_course']['id']."'
  330. AND id_session ='".$session_id."'
  331. AND id_user = '".$user_id."'")) > 0) {
  332. return false;
  333. }
  334. // check if the user is registered in the session with other course
  335. $sql = "SELECT id_user FROM ".Database::get_main_table(TABLE_MAIN_SESSION_COURSE_USER)." WHERE id_session='".$session_id."' AND id_user='$user_id'";
  336. $rs = Database::query($sql);
  337. if (Database::num_rows($rs) == 0) {
  338. // Check whether the user has not already been stored in the session_rel_user table
  339. if (Database::num_rows(@Database::query("SELECT * FROM ".Database::get_main_table(TABLE_MAIN_SESSION_USER)."
  340. WHERE id_session ='".$session_id."'
  341. AND id_user = '".$user_id."' AND relation_type<>".SESSION_RELATION_TYPE_RRHH." ")) > 0) {
  342. return false;
  343. }
  344. }
  345. // Add him/her in the table session_rel_course_rel_user
  346. @Database::query("INSERT INTO ".Database::get_main_table(TABLE_MAIN_SESSION_COURSE_USER)."
  347. SET id_session ='".$session_id."',
  348. course_code = '".$_SESSION['_course']['id']."',
  349. id_user = '".$user_id."'");
  350. // Add him/her in the table session_rel_user
  351. @Database::query("INSERT INTO ".Database::get_main_table(TABLE_MAIN_SESSION_USER)."
  352. SET id_session ='".$session_id."',
  353. id_user = '".$user_id."'");
  354. // Update the table session
  355. $row = Database::fetch_array(@Database::query("SELECT COUNT(*) FROM ".Database::get_main_table(TABLE_MAIN_SESSION_USER)." WHERE id_session = '".$session_id."' AND relation_type<>".SESSION_RELATION_TYPE_RRHH.""));
  356. $count = $row[0]; // number of users by session
  357. $result = @Database::query("UPDATE ".Database::get_main_table(TABLE_MAIN_SESSION)." SET nbr_users = '$count' WHERE id = '".$session_id."'");
  358. // Update the table session_rel_course
  359. $row = Database::fetch_array(@Database::query("SELECT COUNT(*) FROM ".Database::get_main_table(TABLE_MAIN_SESSION_COURSE_USER)." WHERE id_session = '".$session_id."' AND course_code = '$course_code' AND status<>2" ));
  360. $count = $row[0]; // number of users by session
  361. $result = @Database::query("UPDATE ".Database::get_main_table(TABLE_MAIN_SESSION_COURSE)." SET nbr_users = '$count' WHERE id_session = '".$session_id."' AND course_code = '$course_code' ");
  362. } else {
  363. $course_sort = self::userCourseSort($user_id, $course_code);
  364. $result = @Database::query("INSERT INTO ".Database::get_main_table(TABLE_MAIN_COURSE_USER)."
  365. SET course_code = '$course_code',
  366. user_id = '$user_id',
  367. status = '".$status."',
  368. sort = '". ($course_sort)."'");
  369. // Add event to the system log.
  370. $time = time();
  371. $user_id = api_get_user_id();
  372. event_system(LOG_SUBSCRIBE_USER_TO_COURSE, LOG_COURSE_CODE, $course_code, $time, $user_id);
  373. }
  374. return (bool)$result;
  375. }
  376. /**
  377. * Get the course id based on the original id and field name in the extra fields. Returns 0 if course was not found
  378. *
  379. * @param string Original course id
  380. * @param string Original field name
  381. * @return int Course id
  382. */
  383. public static function get_course_code_from_original_id($original_course_id_value, $original_course_id_name) {
  384. $t_cfv = Database::get_main_table(TABLE_MAIN_COURSE_FIELD_VALUES);
  385. $table_field = Database::get_main_table(TABLE_MAIN_COURSE_FIELD);
  386. $sql_course = "SELECT course_code FROM $table_field cf INNER JOIN $t_cfv cfv ON cfv.field_id=cf.id WHERE field_variable='$original_course_id_name' AND field_value='$original_course_id_value'";
  387. $res = Database::query($sql_course);
  388. $row = Database::fetch_object($res);
  389. if ($row) {
  390. return $row->course_code;
  391. } else {
  392. return 0;
  393. }
  394. }
  395. /**
  396. * Gets the course code from the course id. Returns null if course id was not found
  397. *
  398. * @param int Course id
  399. * @return string Course code
  400. */
  401. public static function get_course_code_from_course_id($id) {
  402. $table = Database::get_main_table(TABLE_MAIN_COURSE);
  403. $sql = "SELECT code FROM course WHERE id = '$id';";
  404. $res = Database::query($sql);
  405. $row = Database::fetch_object($res);
  406. if ($row) {
  407. return $row->code;
  408. } else {
  409. return null;
  410. }
  411. }
  412. /**
  413. * Subscribe a user $user_id to a course $course_code.
  414. * @author Hugues Peeters
  415. * @author Roan Embrechts
  416. *
  417. * @param int $user_id the id of the user
  418. * @param string $course_code the course code
  419. * @param string $status (optional) The user's status in the course
  420. *
  421. * @return boolean true if subscription succeeds, boolean false otherwise.
  422. */
  423. public static function add_user_to_course($user_id, $course_code, $status = STUDENT) {
  424. $user_table = Database::get_main_table(TABLE_MAIN_USER);
  425. $course_table = Database::get_main_table(TABLE_MAIN_COURSE);
  426. $course_user_table = Database::get_main_table(TABLE_MAIN_COURSE_USER);
  427. $status = ($status == STUDENT || $status == COURSEMANAGER) ? $status : STUDENT;
  428. if (empty($user_id) || empty($course_code) || ($user_id != strval(intval($user_id)))) {
  429. return false;
  430. }
  431. $course_code = Database::escape_string($course_code);
  432. // Check in advance whether the user has already been registered on the platform.
  433. if (Database::num_rows(Database::query("SELECT status FROM ".$user_table." WHERE user_id = '$user_id' ")) == 0) {
  434. return false; // Thehe user has not been registered to the platform.
  435. }
  436. // Check whether the user has already been subscribed to this course.
  437. if (Database::num_rows(Database::query("SELECT * FROM ".$course_user_table." WHERE user_id = '$user_id' AND relation_type<>".COURSE_RELATION_TYPE_RRHH." AND course_code = '$course_code'")) > 0) {
  438. return false; // The user has been subscribed to the course.
  439. }
  440. // Check in advance whether subscription is allowed or not for this course.
  441. if (Database::num_rows(Database::query("SELECT code, visibility FROM ".$course_table." WHERE code = '$course_code' AND subscribe = '".SUBSCRIBE_NOT_ALLOWED."'")) > 0) {
  442. return false; // Subscription is not allowed for this course.
  443. }
  444. // Ok, subscribe the user.
  445. $max_sort = api_max_sort_value('0', $user_id);
  446. return (bool)Database::query("INSERT INTO ".$course_user_table."
  447. SET course_code = '$course_code',
  448. user_id = '$user_id',
  449. status = '".$status."',
  450. sort = '". ($max_sort + 1)."'");
  451. }
  452. /**
  453. * Checks wether a parameter exists.
  454. * If it doesn't, the function displays an error message.
  455. *
  456. * @return true if parameter is set and not empty, false otherwise
  457. * @todo move function to better place, main_api ?
  458. */
  459. public static function check_parameter($parameter, $error_message) {
  460. if (empty($parameter)) {
  461. Display::display_normal_message($error_message);
  462. return false;
  463. }
  464. return true;
  465. }
  466. /**
  467. * Lets the script die when a parameter check fails.
  468. * @todo move function to better place, main_api ?
  469. */
  470. public static function check_parameter_or_fail($parameter, $error_message) {
  471. if (!self::check_parameter($parameter, $error_message)) {
  472. die();
  473. }
  474. }
  475. /**
  476. * @return true if there already are one or more courses
  477. * with the same code OR visual_code (visualcode), false otherwise
  478. */
  479. public static function course_code_exists($wanted_course_code) {
  480. $wanted_course_code = Database::escape_string($wanted_course_code);
  481. $result = Database::fetch_array(Database::query("SELECT COUNT(*) as number FROM ".Database::get_main_table(TABLE_MAIN_COURSE)."WHERE code = '$wanted_course_code' OR visual_code = '$wanted_course_code'"));
  482. return $result['number'] > 0;
  483. }
  484. /**
  485. * @return an array with the course info of all real courses on the platform
  486. */
  487. public static function get_real_course_list() {
  488. $sql_result = Database::query("SELECT * FROM ".Database::get_main_table(TABLE_MAIN_COURSE)." WHERE target_course_code IS NULL");
  489. $real_course_list = array();
  490. while ($result = Database::fetch_array($sql_result)) {
  491. $real_course_list[$result['code']] = $result;
  492. }
  493. return $real_course_list;
  494. }
  495. /**
  496. * Lists all virtual courses
  497. * @return array Course info (course code => details) of all virtual courses on the platform
  498. */
  499. public static function get_virtual_course_list() {
  500. $sql_result = Database::query("SELECT * FROM ".Database::get_main_table(TABLE_MAIN_COURSE)." WHERE target_course_code IS NOT NULL");
  501. $virtual_course_list = array();
  502. while ($result = Database::fetch_array($sql_result)) {
  503. $virtual_course_list[$result['code']] = $result;
  504. }
  505. return $virtual_course_list;
  506. }
  507. /**
  508. * Returns an array with the course info of the real courses of which
  509. * the current user is course admin
  510. * @return array A list of courses details for courses to which the user is subscribed as course admin (status = 1)
  511. */
  512. public static function get_real_course_list_of_user_as_course_admin($user_id) {
  513. $result_array = array();
  514. if ($user_id != strval(intval($user_id))) {
  515. return $result_array;
  516. }
  517. $sql_result = Database::query("SELECT *
  518. FROM ".Database::get_main_table(TABLE_MAIN_COURSE)." course
  519. LEFT JOIN ".Database::get_main_table(TABLE_MAIN_COURSE_USER)." course_user
  520. ON course.code = course_user.course_code
  521. WHERE course.target_course_code IS NULL
  522. AND course_user.user_id = '$user_id'
  523. AND course_user.status = '1'");
  524. if ($sql_result === false) { return $result_array; }
  525. while ($result = Database::fetch_array($sql_result)) {
  526. $result_array[] = $result;
  527. }
  528. return $result_array;
  529. }
  530. /**
  531. * @return an array with the course info of all the courses (real and virtual) of which
  532. * the current user is course admin
  533. */
  534. public static function get_course_list_of_user_as_course_admin($user_id) {
  535. global $_configuration;
  536. if ($user_id != strval(intval($user_id))) {
  537. return array();
  538. }
  539. // Definitions database tables and variables
  540. $tbl_course = Database::get_main_table(TABLE_MAIN_COURSE);
  541. $tbl_course_user = Database::get_main_table(TABLE_MAIN_COURSE_USER);
  542. $user_id = intval($user_id);
  543. $data = array();
  544. $sql_nb_cours = "SELECT course_rel_user.course_code, course.title, course.id, course.db_name
  545. FROM $tbl_course_user as course_rel_user
  546. INNER JOIN $tbl_course as course
  547. ON course.code = course_rel_user.course_code
  548. WHERE course_rel_user.user_id='$user_id' AND course_rel_user.status='1'
  549. ORDER BY course.title";
  550. if ($_configuration['multiple_access_urls']) {
  551. $tbl_course_rel_access_url = Database::get_main_table(TABLE_MAIN_ACCESS_URL_REL_COURSE);
  552. $access_url_id = api_get_current_access_url_id();
  553. if ($access_url_id != -1) {
  554. $sql_nb_cours = " SELECT course_rel_user.course_code, course.title, course.id, course.db_name
  555. FROM $tbl_course_user as course_rel_user
  556. INNER JOIN $tbl_course as course
  557. ON course.code = course_rel_user.course_code
  558. INNER JOIN $tbl_course_rel_access_url course_rel_url
  559. ON (course_rel_url.course_code= course.code)
  560. WHERE access_url_id = $access_url_id AND course_rel_user.user_id='$user_id' AND course_rel_user.status='1'
  561. ORDER BY course.title";
  562. }
  563. }
  564. $result_nb_cours = Database::query($sql_nb_cours);
  565. if (Database::num_rows($result_nb_cours) > 0) {
  566. while ($row = Database::fetch_array($result_nb_cours,'ASSOC')) {
  567. $data[$row['course_code']] = $row;
  568. }
  569. }
  570. return $data;
  571. }
  572. /**
  573. * Find out for which courses the user is registered and determine a visual course code and course title from that.
  574. * Takes virtual courses into account
  575. *
  576. * Default case: the name and code stay what they are.
  577. *
  578. * Scenarios:
  579. * - User is registered in real course and virtual courses; name / code become a mix of all
  580. * - User is registered in real course only: name stays that of real course
  581. * - User is registered in virtual course only: name becomes that of virtual course
  582. * - user is not registered to any of the real/virtual courses: name stays that of real course
  583. * (I'm not sure about the last case, but this seems not too bad)
  584. *
  585. * @author Roan Embrechts
  586. * @param $user_id, the id of the user
  587. * @param $course_info, an array with course info that you get using Database::get_course_info($course_system_code);
  588. * @return an array with indices
  589. * $return_result['title'] - the course title of the combined courses
  590. * $return_result['code'] - the course code of the combined courses
  591. */
  592. public static function determine_course_title_from_course_info($user_id, $course_info) {
  593. if ($user_id != strval(intval($user_id))) {
  594. return array();
  595. }
  596. $real_course_id = $course_info['system_code'];
  597. $real_course_info = Database::get_course_info($real_course_id);
  598. $real_course_name = $real_course_info['title'];
  599. $real_course_visual_code = $real_course_info['visual_code'];
  600. $real_course_real_code = Database::escape_string($course_info['system_code']);
  601. //is the user registered in the real course?
  602. $result = Database::fetch_array(Database::query("SELECT * FROM ".Database::get_main_table(TABLE_MAIN_COURSE_USER)."
  603. WHERE user_id = '$user_id' AND relation_type<>".COURSE_RELATION_TYPE_RRHH." AND course_code = '$real_course_real_code'"));
  604. $user_is_registered_in_real_course = !empty($result);
  605. //get a list of virtual courses linked to the current real course and to which the current user is subscribed
  606. $user_subscribed_virtual_course_list = self::get_list_of_virtual_courses_for_specific_user_and_real_course($user_id, $real_course_id);
  607. $virtual_courses_exist = count($user_subscribed_virtual_course_list) > 0;
  608. //now determine course code and name
  609. if ($user_is_registered_in_real_course && $virtual_courses_exist) {
  610. $course_info['name'] = self::create_combined_name($user_is_registered_in_real_course, $real_course_name, $user_subscribed_virtual_course_list);
  611. $course_info['official_code'] = self::create_combined_code($user_is_registered_in_real_course, $real_course_visual_code, $user_subscribed_virtual_course_list);
  612. }
  613. elseif ($user_is_registered_in_real_course) {
  614. //course name remains real course name
  615. $course_info['name'] = $real_course_name;
  616. $course_info['official_code'] = $real_course_visual_code;
  617. }
  618. elseif ($virtual_courses_exist) {
  619. $course_info['name'] = self::create_combined_name($user_is_registered_in_real_course, $real_course_name, $user_subscribed_virtual_course_list);
  620. $course_info['official_code'] = self::create_combined_code($user_is_registered_in_real_course, $real_course_visual_code, $user_subscribed_virtual_course_list);
  621. } else {
  622. //course name remains real course name
  623. $course_info['name'] = $real_course_name;
  624. $course_info['official_code'] = $real_course_visual_code;
  625. }
  626. $return_result['title'] = $course_info['name'];
  627. $return_result['code'] = $course_info['official_code'];
  628. return $return_result;
  629. }
  630. /**
  631. * Create a course title based on all real and virtual courses the user is registered in.
  632. * @param boolean $user_is_registered_in_real_course
  633. * @param string $real_course_name, the title of the real course
  634. * @param array $virtual_course_list, the list of virtual courses
  635. */
  636. public static function create_combined_name($user_is_registered_in_real_course, $real_course_name, $virtual_course_list) {
  637. $complete_course_name = array();
  638. if ($user_is_registered_in_real_course) {
  639. // Add the real name to the result.
  640. $complete_course_name[] = $real_course_name;
  641. }
  642. // Add course titles of all virtual courses.
  643. foreach ($virtual_course_list as $current_course) {
  644. $complete_course_name[] = $current_course['title'];
  645. }
  646. // 'CombinedCourse' is from course_home language file.
  647. return (($user_is_registered_in_real_course || count($virtual_course_list) > 1) ? get_lang('CombinedCourse').' ' : '').implode(' &amp; ', $complete_course_name);
  648. }
  649. /**
  650. * Create a course code based on all real and virtual courses the user is registered in.
  651. */
  652. public static function create_combined_code($user_is_registered_in_real_course, $real_course_code, $virtual_course_list) {
  653. $complete_course_code = array();
  654. if ($user_is_registered_in_real_course) {
  655. // Add the real code to the result
  656. $complete_course_code[] = $real_course_code;
  657. }
  658. // Add codes of all virtual courses.
  659. foreach ($virtual_course_list as $current_course) {
  660. $complete_course_code[] = $current_course['visual_code'];
  661. }
  662. return implode(' &amp; ', $complete_course_code);
  663. }
  664. /**
  665. * Return course info array of virtual course
  666. *
  667. * Note this is different from getting information about a real course!
  668. *
  669. * @param $real_course_code, the id of the real course which the virtual course is linked to
  670. */
  671. public static function get_virtual_course_info($real_course_code) {
  672. $sql_result = Database::query("SELECT * FROM ".Database::get_main_table(TABLE_MAIN_COURSE)."
  673. WHERE target_course_code = '".Database::escape_string($real_course_code)."'");
  674. $result = array();
  675. while ($virtual_course = Database::fetch_array($sql_result)) {
  676. $result[] = $virtual_course;
  677. }
  678. return $result;
  679. }
  680. /**
  681. * @param string $system_code, the system code of the course
  682. * @return true if the course is a virtual course, false otherwise
  683. */
  684. public static function is_virtual_course_from_system_code($system_code) {
  685. $result = Database::fetch_array(Database::query("SELECT target_course_code FROM ".Database::get_main_table(TABLE_MAIN_COURSE)."
  686. WHERE code = '".Database::escape_string($system_code)."'"));
  687. return !empty($result['target_course_code']);
  688. }
  689. /**
  690. * Returns whether the course code given is a visual code
  691. * @param string Visual course code
  692. * @return true if the course is a virtual course, false otherwise
  693. */
  694. public static function is_virtual_course_from_visual_code($visual_code) {
  695. $result = Database::fetch_array(Database::query("SELECT target_course_code FROM ".Database::get_main_table(TABLE_MAIN_COURSE)."
  696. WHERE visual_code = '".Database::escape_string($visual_code)."'"));
  697. return !empty($result['target_course_code']);
  698. }
  699. /**
  700. * @return true if the real course has virtual courses that the user is subscribed to, false otherwise
  701. */
  702. public static function has_virtual_courses_from_code($real_course_code, $user_id) {
  703. return count(self::get_list_of_virtual_courses_for_specific_user_and_real_course($user_id, $real_course_code)) > 0;
  704. }
  705. /**
  706. * Return an array of arrays, listing course info of all virtual course
  707. * linked to the real course ID $real_course_code
  708. *
  709. * @param string The id of the real course which the virtual courses are linked to
  710. * @return array List of courses details
  711. */
  712. public static function get_virtual_courses_linked_to_real_course($real_course_code) {
  713. $sql_result = Database::query("SELECT * FROM ".Database::get_main_table(TABLE_MAIN_COURSE)."
  714. WHERE target_course_code = '".Database::get_main_table(TABLE_MAIN_COURSE)."'");
  715. $result_array = array();
  716. while ($result = Database::fetch_array($sql_result)) {
  717. $result_array[] = $result;
  718. }
  719. return $result_array;
  720. }
  721. /**
  722. * This function returns the course code of the real course
  723. * to which a virtual course is linked.
  724. *
  725. * @param the course code of the virtual course
  726. * @return the course code of the real course
  727. */
  728. public static function get_target_of_linked_course($virtual_course_code) {
  729. //get info about the virtual course
  730. $result = Database::fetch_array(Database::query("SELECT * FROM ".Database::get_main_table(TABLE_MAIN_COURSE)."
  731. WHERE code = '".Database::escape_string($virtual_course_code)."'"));
  732. return $result['target_course_code'];
  733. }
  734. /*
  735. ==============================================================================
  736. USER FUNCTIONS
  737. ==============================================================================
  738. */
  739. /**
  740. * Check if user is subscribed inside a course
  741. * @param int User id
  742. * @param string Course code, if this parameter is null, it'll check for all courses
  743. * @param bool True for checking inside sessions too, by default is not checked
  744. * @return bool true if the user is registered in the course, false otherwise
  745. */
  746. public static function is_user_subscribed_in_course($user_id, $course_code = null, $in_a_session = false) {
  747. $user_id = intval($user_id);
  748. $condition_course = '';
  749. if (isset($course_code)) {
  750. $course_code = Database::escape_string($course_code);
  751. $condition_course = ' AND course_code = "'.$course_code.'" ';
  752. }
  753. $result = Database::fetch_array(Database::query("SELECT * FROM ".Database::get_main_table(TABLE_MAIN_COURSE_USER)."
  754. WHERE user_id = $user_id AND relation_type<>".COURSE_RELATION_TYPE_RRHH." $condition_course "));
  755. if (!empty($result)) {
  756. return true; // The user has been registered in this course.
  757. }
  758. if (!$in_a_session) {
  759. return false; // The user has not been registered in this course.
  760. }
  761. if (Database::num_rows(Database::query('SELECT 1 FROM '.Database::get_main_table(TABLE_MAIN_SESSION_COURSE_USER).
  762. ' WHERE id_user = '.$user_id.' '.$condition_course.' ')) > 0) {
  763. return true;
  764. }
  765. if (Database::num_rows(Database::query('SELECT 1 FROM '.Database::get_main_table(TABLE_MAIN_SESSION_COURSE_USER).
  766. ' WHERE id_user = '.$user_id.' AND status=2 '.$condition_course.' ')) > 0) {
  767. return true;
  768. }
  769. if (Database::num_rows(Database::query('SELECT 1 FROM '.Database::get_main_table(TABLE_MAIN_SESSION).
  770. ' WHERE id='.intval($_SESSION['id_session']).' AND id_coach='.$user_id)) > 0) {
  771. return true;
  772. }
  773. return false;
  774. }
  775. /**
  776. * Is the user a teacher in the given course?
  777. *
  778. * @param $user_id, the id (int) of the user
  779. * @param $course_code, the course code
  780. *
  781. * @return true if the user is a teacher in the course, false otherwise
  782. */
  783. public static function is_course_teacher($user_id, $course_code) {
  784. if ($user_id != strval(intval($user_id))) {
  785. return false;
  786. }
  787. $sql_result = Database::query('SELECT status FROM '.Database::get_main_table(TABLE_MAIN_COURSE_USER).
  788. ' WHERE course_code="'.Database::escape_string($course_code).'" and user_id="'.$user_id.'"');
  789. if (Database::num_rows($sql_result) > 0) {
  790. return Database::result($sql_result, 0, 'status') == 1;
  791. }
  792. return false;
  793. }
  794. /**
  795. * Is the user subscribed in the real course or linked courses?
  796. *
  797. * @param int the id of the user
  798. * @param array info about the course (comes from course table, see database lib)
  799. *
  800. * @return true if the user is registered in the real course or linked courses, false otherwise
  801. */
  802. public static function is_user_subscribed_in_real_or_linked_course ($user_id, $course_code, $session_id = '') {
  803. if ($user_id != strval(intval($user_id))) {
  804. return false;
  805. }
  806. $course_code = Database::escape_string($course_code);
  807. if ($session_id == '') {
  808. $result = Database::fetch_array(Database::query("SELECT *
  809. FROM ".Database::get_main_table(TABLE_MAIN_COURSE)." course
  810. LEFT JOIN ".Database::get_main_table(TABLE_MAIN_COURSE_USER)." course_user
  811. ON course.code = course_user.course_code
  812. WHERE course_user.user_id = '$user_id' AND course_user.relation_type<>".COURSE_RELATION_TYPE_RRHH." AND ( course.code = '$course_code' OR target_course_code = '$course_code')"));
  813. return !empty($result);
  814. }
  815. // From here we trust session id.
  816. // Is he/she subscribed to the session's course?
  817. // A user?
  818. if (Database::num_rows(Database::query("SELECT id_user
  819. FROM ".Database::get_main_table(TABLE_MAIN_SESSION_COURSE_USER)."
  820. WHERE id_session='".$_SESSION['id_session']."'
  821. AND id_user='$user_id'"))) {
  822. return true;
  823. }
  824. // A course coach?
  825. if (Database::num_rows(Database::query("SELECT id_user
  826. FROM ".Database::get_main_table(TABLE_MAIN_SESSION_COURSE_USER)."
  827. WHERE id_session='".$_SESSION['id_session']."'
  828. AND id_user = '$user_id' AND status = 2
  829. AND course_code='$course_code'"))) {
  830. return true;
  831. }
  832. // A session coach?
  833. if (Database::num_rows(Database::query("SELECT id_coach
  834. FROM ".Database::get_main_table(TABLE_MAIN_SESSION)." AS session
  835. WHERE session.id='".$_SESSION['id_session']."'
  836. AND id_coach='$user_id'"))) {
  837. return true;
  838. }
  839. return false;
  840. }
  841. /**
  842. * Return user info array of all users registered in the specified real or virtual course
  843. * This only returns the users that are registered in this actual course, not linked courses.
  844. *
  845. * @param string $course_code the code of the course
  846. * @param boolean $with_session determines if the course is used in a session or not
  847. * @param integer $session_id the id of the session
  848. * @param string $limit the LIMIT statement of the sql statement
  849. * @param string $order_by the field to order the users by. Valid values are 'lastname', 'firstname', 'username', 'email', 'official_code' OR a part of a SQL statement that starts with ORDER BY ...
  850. * @return array
  851. */
  852. public static function get_user_list_from_course_code($course_code, $with_session = true, $session_id = 0, $limit = '', $order_by = '') {
  853. global $_configuration;
  854. // variable initialisation
  855. $session_id = intval($session_id);
  856. $users = array();
  857. $course_code = Database::escape_string($course_code);
  858. $where = array();
  859. // if the $order_by does not contain 'ORDER BY' we have to check if it is a valid field that can be sorted on
  860. if (!strstr($order_by,'ORDER BY')) {
  861. if (!empty($order_by) AND in_array($order_by, array('lastname', 'firstname', 'username', 'email', 'official_code'))){
  862. $order_by = 'ORDER BY user.'.$order_by;
  863. } else {
  864. $order_by = '';
  865. }
  866. }
  867. $sql = $session_id == 0
  868. ? 'SELECT DISTINCT course_rel_user.status as status_rel, user.user_id, course_rel_user.role, course_rel_user.tutor_id, user.* '
  869. : 'SELECT DISTINCT user.user_id, session_course_user.status as status_session, user.* ';
  870. $sql .= ' FROM '.Database::get_main_table(TABLE_MAIN_USER).' as user ';
  871. if (api_get_setting('use_session_mode')=='true' && $with_session) {
  872. $sql .= ' LEFT JOIN '.Database::get_main_table(TABLE_MAIN_SESSION_COURSE_USER).' as session_course_user
  873. ON user.user_id = session_course_user.id_user
  874. AND session_course_user.course_code="'.$course_code.'"';
  875. if ($session_id != 0) {
  876. $sql .= ' AND session_course_user.id_session = '.$session_id;
  877. }
  878. $where[] = ' session_course_user.course_code IS NOT NULL ';
  879. }
  880. if ($session_id == 0) {
  881. $sql .= ' LEFT JOIN '.Database::get_main_table(TABLE_MAIN_COURSE_USER).' as course_rel_user
  882. ON user.user_id = course_rel_user.user_id AND course_rel_user.relation_type<>'.COURSE_RELATION_TYPE_RRHH.'
  883. AND course_rel_user.course_code="'.$course_code.'"';
  884. $where[] = ' course_rel_user.course_code IS NOT NULL ';
  885. }
  886. if ($_configuration['multiple_access_urls']) {
  887. $sql .= ' LEFT JOIN '.Database::get_main_table(TABLE_MAIN_ACCESS_URL_REL_USER).' au ON (au.user_id = user.user_id) ';
  888. }
  889. $sql .= ' WHERE '.implode(' OR ', $where);
  890. if ($_configuration['multiple_access_urls']) {
  891. $current_access_url_id = api_get_current_access_url_id();
  892. $sql .= " AND (access_url_id = $current_access_url_id ) ";
  893. }
  894. $sql .= ' '.$order_by.' '.$limit;
  895. $rs = Database::query($sql);
  896. while ($user = Database::fetch_array($rs)) {
  897. //$user_info = Database::get_user_info_from_id($user['user_id']);
  898. $user_info = $user;
  899. $user_info['status'] = $user['status'];
  900. if (isset($user['role'])) {
  901. $user_info['role'] = $user['role'];
  902. }
  903. if (isset($user['tutor_id'])) {
  904. $user_info['tutor_id'] = $user['tutor_id'];
  905. }
  906. if (!empty($session_id)) {
  907. $user_info['status_session'] = $user['status_session'];
  908. }
  909. $users[$user['user_id']] = $user_info;
  910. }
  911. return $users;
  912. }
  913. /**
  914. * Get a list of coaches of a course and a session
  915. * @param string Course code
  916. * @param int Session ID
  917. * @return array List of users
  918. */
  919. public static function get_coach_list_from_course_code($course_code, $session_id) {
  920. if ($session_id != strval(intval($session_id))) {
  921. return array();
  922. }
  923. $course_code = Database::escape_string($course_code);
  924. $users = array();
  925. // We get the coach for the given course in a given session.
  926. $rs = Database::query('SELECT id_user FROM '.Database::get_main_table(TABLE_MAIN_SESSION_COURSE_USER).
  927. ' WHERE id_session="'.$session_id.'" AND course_code="'.$course_code.'" AND status = 2');
  928. while ($user = Database::fetch_array($rs)) {
  929. $user_info = Database::get_user_info_from_id($user['id_user']);
  930. $user_info['status'] = $user['status'];
  931. $user_info['role'] = $user['role'];
  932. $user_info['tutor_id'] = $user['tutor_id'];
  933. $user_info['email'] = $user['email'];
  934. $users[$user['id_user']] = $user_info;
  935. }
  936. // We get the session coach.
  937. $rs = Database::query('SELECT id_coach FROM '.Database::get_main_table(TABLE_MAIN_SESSION).
  938. ' WHERE id="'.$session_id.'"');
  939. $user_info = array();
  940. $session_id_coach = Database::result($rs, 0, 'id_coach');
  941. $user_info = Database::get_user_info_from_id($session_id_coach);
  942. $user_info['status'] = $user['status'];
  943. $user_info['role'] = $user['role'];
  944. $user_info['tutor_id'] = $user['tutor_id'];
  945. $user_info['email'] = $user['email'];
  946. $users[$session_id_coach] = $user_info;
  947. return $users;
  948. }
  949. /**
  950. * Return user info array of all users registered in the specified real or virtual course
  951. * This only returns the users that are registered in this actual course, not linked courses.
  952. *
  953. * @param string $course_code
  954. * @param boolean $full list to true if we want sessions students too
  955. * @return array with user id
  956. */
  957. public static function get_student_list_from_course_code($course_code, $with_session = false, $session_id = 0) {
  958. $session_id = intval($session_id);
  959. $course_code = Database::escape_string($course_code);
  960. $students = array();
  961. if ($session_id == 0) {
  962. // students directly subscribed to the course
  963. $rs = Database::query("SELECT * FROM ".Database::get_main_table(TABLE_MAIN_COURSE_USER)."
  964. WHERE course_code = '$course_code' AND status = 5");
  965. while ($student = Database::fetch_array($rs)) {
  966. $students[$student['user_id']] = $student;
  967. }
  968. }
  969. // students subscribed to the course through a session
  970. if (api_get_setting('use_session_mode') == 'true' && $with_session) {
  971. $sql_query = "SELECT * FROM ".Database::get_main_table(TABLE_MAIN_SESSION_COURSE_USER)." WHERE course_code = '$course_code' AND status<>2";
  972. if ($session_id != 0) {
  973. $sql_query .= ' AND id_session = '.$session_id;
  974. }
  975. $rs = Database::query($sql_query);
  976. while($student = Database::fetch_array($rs)) {
  977. $students[$student['id_user']] = $student;
  978. }
  979. }
  980. return $students;
  981. }
  982. /**
  983. * Return user info array of all teacher-users registered in the specified real or virtual course
  984. * This only returns the users that are registered in this actual course, not linked courses.
  985. *
  986. * @param string $course_code
  987. * @return array with user id
  988. */
  989. public static function get_teacher_list_from_course_code($course_code) {
  990. $course_code = Database::escape_string($course_code);
  991. // teachers directly subscribed to the course
  992. $teachers = array();
  993. // TODO: This query is not optimal.
  994. $rs = Database::query("SELECT u.user_id, u.lastname, u.firstname, u.email, u.username, u.status " .
  995. "FROM ".Database::get_main_table(TABLE_MAIN_COURSE_USER)." cu, ".Database::get_main_table(TABLE_MAIN_USER)." u ".
  996. "WHERE cu.course_code = '$course_code' " .
  997. "AND cu.status = 1 " .
  998. "AND cu.user_id = u.user_id");
  999. while ($teacher = Database::fetch_array($rs)) {
  1000. $teachers[$teacher['user_id']] = $teacher;
  1001. }
  1002. return $teachers;
  1003. }
  1004. /**
  1005. * Return user info array of all users registered in the specified course
  1006. * this includes the users of the course itsel and the users of all linked courses.
  1007. *
  1008. * @param array $course_info
  1009. * @return array with user info
  1010. */
  1011. public static function get_real_and_linked_user_list($course_code, $with_sessions = true, $session_id = 0) {
  1012. //get list of virtual courses
  1013. $virtual_course_list = self::get_virtual_courses_linked_to_real_course($course_code);
  1014. //get users from real course
  1015. $user_list = self::get_user_list_from_course_code($course_code, $with_sessions, $session_id);
  1016. foreach ($user_list as $this_user) {
  1017. $complete_user_list[] = $this_user;
  1018. }
  1019. //get users from linked courses
  1020. foreach ($virtual_course_list as $this_course) {
  1021. $course_code = $this_course['code'];
  1022. $user_list = self::get_user_list_from_course_code($course_code, $with_sessions, $session_id);
  1023. foreach ($user_list as $this_user) {
  1024. $complete_user_list[] = $this_user;
  1025. }
  1026. }
  1027. return $complete_user_list;
  1028. }
  1029. /**
  1030. * Return an array of arrays, listing course info of all courses in the list
  1031. * linked to the real course $real_course_code, to which the user $user_id is subscribed.
  1032. *
  1033. * @param $user_id, the id (int) of the user
  1034. * @param $real_course_code, the id (char) of the real course
  1035. *
  1036. * @return array of course info arrays
  1037. */
  1038. public static function get_list_of_virtual_courses_for_specific_user_and_real_course($user_id, $real_course_code) {
  1039. $result_array = array();
  1040. if ($user_id != strval(intval($user_id))) {
  1041. return $result_array;
  1042. }
  1043. $course_code = Database::escape_string($course_code);
  1044. $sql_result = Database::query("SELECT *
  1045. FROM ".Database::get_main_table(TABLE_MAIN_COURSE)." course
  1046. LEFT JOIN ".Database::get_main_table(TABLE_MAIN_COURSE_USER)." course_user
  1047. ON course.code = course_user.course_code
  1048. WHERE course.target_course_code = '$real_course_code' AND course_user.user_id = '$user_id' AND course_user.relation_type<>".COURSE_RELATION_TYPE_RRHH." ");
  1049. while ($result = Database::fetch_array($sql_result)) {
  1050. $result_array[] = $result;
  1051. }
  1052. return $result_array;
  1053. }
  1054. /*
  1055. ==============================================================================
  1056. GROUP FUNCTIONS
  1057. ==============================================================================
  1058. */
  1059. /**
  1060. * Get the list of groups from the course
  1061. * @param string Course code
  1062. * @param int Session ID (optional)
  1063. * @return array List of groups info
  1064. */
  1065. public static function get_group_list_of_course($course_code, $session_id = 0) {
  1066. $course_info = Database::get_course_info($course_code);
  1067. $database_name = $course_info['db_name'];
  1068. $group_list = array();
  1069. $session_id != 0 ? $session_condition = ' WHERE g.session_id IN(1,'.intval($session_id).')' : $session_condition = ' WHERE g.session_id = 0';
  1070. $sql="SELECT g.id, g.name, COUNT(gu.id) userNb
  1071. FROM ".Database::get_course_table(TABLE_GROUP, $database_name)." AS g
  1072. LEFT JOIN ".Database::get_course_table(TABLE_GROUP_USER, $database_name)." gu
  1073. ON g.id = gu.group_id
  1074. $session_condition
  1075. GROUP BY g.id
  1076. ORDER BY g.name";
  1077. //var_dump($sql);
  1078. //exit();
  1079. $result = Database::query($sql);
  1080. while ($group_data = Database::fetch_array($result)) {
  1081. $group_list[$group_data['id']] = $group_data;
  1082. }
  1083. return $group_list;
  1084. }
  1085. /**
  1086. * Checks all parameters needed to create a virtual course.
  1087. * If they are all set, the virtual course creation procedure is called.
  1088. *
  1089. * Call this function instead of create_virtual_course
  1090. * @param string Course code
  1091. * @param string Course title
  1092. * @param string Wanted course code
  1093. * @param string Course language
  1094. * @param string Course category
  1095. * @return bool True on success, false on error
  1096. */
  1097. public static function attempt_create_virtual_course($real_course_code, $course_title, $wanted_course_code, $course_language, $course_category) {
  1098. //better: create parameter list, check the entire list, when false display errormessage
  1099. self::check_parameter_or_fail($real_course_code, 'Unspecified parameter: real course id.');
  1100. self::check_parameter_or_fail($course_title, 'Unspecified parameter: course title.');
  1101. self::check_parameter_or_fail($wanted_course_code, 'Unspecified parameter: wanted course code.');
  1102. self::check_parameter_or_fail($course_language, 'Unspecified parameter: course language.');
  1103. self::check_parameter_or_fail($course_category, 'Unspecified parameter: course category.');
  1104. return self::create_virtual_course($real_course_code, $course_title, $wanted_course_code, $course_language, $course_category);
  1105. }
  1106. /**
  1107. * This function creates a virtual course.
  1108. * It assumes all parameters have been checked and are not empty.
  1109. * It checks wether a course with the $wanted_course_code already exists.
  1110. *
  1111. * Users of this library should consider this function private,
  1112. * please call attempt_create_virtual_course instead of this one.
  1113. *
  1114. * @note The virtual course 'owner' id (the first course admin) is set to the CURRENT user id.
  1115. * @param string Course code
  1116. * @param string Course title
  1117. * @param string Wanted course code
  1118. * @param string Course language
  1119. * @param string Course category
  1120. * @return true if the course creation succeeded, false otherwise
  1121. * @todo research: expiration date of a course
  1122. */
  1123. public static function create_virtual_course($real_course_code, $course_title, $wanted_course_code, $course_language, $course_category) {
  1124. global $firstExpirationDelay;
  1125. $user_id = api_get_user_id();
  1126. $real_course_info = Database::get_course_info($real_course_code);
  1127. $real_course_code = $real_course_info['system_code'];
  1128. //check: virtual course creation fails if another course has the same
  1129. //code, real or fake.
  1130. if (self::course_code_exists($wanted_course_code)) {
  1131. Display::display_error_message($wanted_course_code.' - '.get_lang('CourseCodeAlreadyExists'));
  1132. return false;
  1133. }
  1134. //add data to course table, course_rel_user
  1135. $course_sys_code = $wanted_course_code;
  1136. $course_screen_code = $wanted_course_code;
  1137. $course_repository = $real_course_info['directory'];
  1138. $course_db_name = $real_course_info['db_name'];
  1139. $responsible_teacher = $real_course_info['tutor_name'];
  1140. $faculty_shortname = $course_category;
  1141. // $course_title = $course_title;
  1142. // $course_language = $course_language;
  1143. $teacher_id = $user_id;
  1144. //HACK ----------------------------------------------------------------
  1145. $expiration_date = time() + $firstExpirationDelay;
  1146. //END HACK ------------------------------------------------------------
  1147. register_course($course_sys_code, $course_screen_code, $course_repository, $course_db_name, $responsible_teacher, $faculty_shortname, $course_title, $course_language, $teacher_id, $expiration_date);
  1148. //above was the normal course creation table update call,
  1149. //now one more thing: fill in the target_course_code field
  1150. Database::query("UPDATE ".Database::get_main_table(TABLE_MAIN_COURSE)." SET target_course_code = '$real_course_code'
  1151. WHERE code = '".Database::escape_string($course_sys_code)."' LIMIT 1 ");
  1152. return true;
  1153. }
  1154. /**
  1155. * Delete a course
  1156. * This function deletes a whole course-area from the platform. When the
  1157. * given course is a virtual course, the database and directory will not be
  1158. * deleted.
  1159. * When the given course is a real course, also all virtual courses refering
  1160. * to the given course will be deleted.
  1161. * Considering the fact that we remove all traces of the course in the main
  1162. * database, it makes sense to remove all tracking as well (if stats databases exist)
  1163. * so that a new course created with this code would not use the remains of an older
  1164. * course.
  1165. *
  1166. * @param string The code of the course to delete
  1167. * @todo When deleting a virtual course: unsubscribe users from that virtual
  1168. * course from the groups in the real course if they are not subscribed in
  1169. * that real course.
  1170. * @todo Remove globals
  1171. */
  1172. public static function delete_course($code) {
  1173. global $_configuration;
  1174. $table_course = Database::get_main_table(TABLE_MAIN_COURSE);
  1175. $table_course_user = Database::get_main_table(TABLE_MAIN_COURSE_USER);
  1176. $table_course_class = Database::get_main_table(TABLE_MAIN_COURSE_CLASS);
  1177. $user_role_table = Database::get_main_table(MAIN_USER_ROLE_TABLE);
  1178. $location_table = Database::get_main_table(MAIN_LOCATION_TABLE);
  1179. $role_right_location_table = Database::get_main_table(MAIN_ROLE_RIGHT_LOCATION_TABLE);
  1180. $table_session_course = Database::get_main_table(TABLE_MAIN_SESSION_COURSE);
  1181. $table_session_course_user = Database::get_main_table(TABLE_MAIN_SESSION_COURSE_USER);
  1182. $table_course_survey = Database::get_main_table(TABLE_MAIN_SHARED_SURVEY);
  1183. $table_course_survey_question = Database::get_main_table(TABLE_MAIN_SHARED_SURVEY_QUESTION);
  1184. $table_course_survey_question_option = Database::get_main_table(TABLE_MAIN_SHARED_SURVEY_QUESTION_OPTION);
  1185. $stats = false;
  1186. if (Database::get_statistic_database() != ''){
  1187. $stats = true;
  1188. $table_stats_hotpots = Database::get_statistic_table(TABLE_STATISTIC_TRACK_E_HOTPOTATOES);
  1189. $table_stats_attempt = Database::get_statistic_table(TABLE_STATISTIC_TRACK_E_ATTEMPT);
  1190. $table_stats_exercises = Database::get_statistic_table(TABLE_STATISTIC_TRACK_E_EXERCICES);
  1191. $table_stats_access = Database::get_statistic_table(TABLE_STATISTIC_TRACK_E_ACCESS);
  1192. $table_stats_lastaccess = Database::get_statistic_table(TABLE_STATISTIC_TRACK_E_LASTACCESS);
  1193. $table_stats_course_access = Database::get_statistic_table(TABLE_STATISTIC_TRACK_E_COURSE_ACCESS);
  1194. $table_stats_online = Database::get_statistic_table(TABLE_STATISTIC_TRACK_E_ONLINE);
  1195. $table_stats_default = Database::get_statistic_table(TABLE_STATISTIC_TRACK_E_DEFAULT);
  1196. $table_stats_downloads = Database::get_statistic_table(TABLE_STATISTIC_TRACK_E_DOWNLOADS);
  1197. $table_stats_links = Database::get_statistic_table(TABLE_STATISTIC_TRACK_E_LINKS);
  1198. $table_stats_uploads = Database::get_statistic_table(TABLE_STATISTIC_TRACK_E_UPLOADS);
  1199. }
  1200. $code = Database::escape_string($code);
  1201. $sql = "SELECT * FROM $table_course WHERE code='".$code."'";
  1202. $res = Database::query($sql);
  1203. if (Database::num_rows($res) == 0) {
  1204. return;
  1205. }
  1206. $this_course = Database::fetch_array($res);
  1207. $db_name = $this_course['db_name'];
  1208. self::create_database_dump($code);
  1209. if (!self::is_virtual_course_from_system_code($code)) {
  1210. // If this is not a virtual course, look for virtual courses that depend on this one, if any
  1211. $virtual_courses = self::get_virtual_courses_linked_to_real_course($code);
  1212. foreach ($virtual_courses as $index => $virtual_course) {
  1213. // Unsubscribe all classes from the virtual course
  1214. $sql = "DELETE FROM $table_course_class WHERE course_code='".$virtual_course['code']."'";
  1215. Database::query($sql);
  1216. // Unsubscribe all users from the virtual course
  1217. $sql = "DELETE FROM $table_course_user WHERE course_code='".$virtual_course['code']."'";
  1218. Database::query($sql);
  1219. // Delete the course from the sessions tables
  1220. $sql = "DELETE FROM $table_session_course WHERE course_code='".$virtual_course['code']."'";
  1221. Database::query($sql);
  1222. $sql = "DELETE FROM $table_session_course_user WHERE course_code='".$virtual_course['code']."'";
  1223. Database::query($sql);
  1224. // Delete the course from the survey tables
  1225. $sql = "DELETE FROM $table_course_survey WHERE course_code='".$virtual_course['code']."'";
  1226. Database::query($sql);
  1227. $sql = "DELETE FROM $table_course_survey_user WHERE db_name='".$virtual_course['db_name']."'";
  1228. Database::query($sql);
  1229. $sql = "DELETE FROM $table_course_survey_reminder WHERE db_name='".$virtual_course['db_name']."'";
  1230. Database::query($sql);
  1231. // Delete the course from the stats tables
  1232. if ($stats) {
  1233. $sql = "DELETE FROM $table_stats_hotpots WHERE exe_cours_id = '".$virtual_course['code']."'";
  1234. Database::query($sql);
  1235. $sql = "DELETE FROM $table_stats_attempt WHERE course_code = '".$virtual_course['code']."'";
  1236. Database::query($sql);
  1237. $sql = "DELETE FROM $table_stats_exercises WHERE exe_cours_id = '".$virtual_course['code']."'";
  1238. Database::query($sql);
  1239. $sql = "DELETE FROM $table_stats_access WHERE access_cours_code = '".$virtual_course['code']."'";
  1240. Database::query($sql);
  1241. $sql = "DELETE FROM $table_stats_lastaccess WHERE access_cours_code = '".$virtual_course['code']."'";
  1242. Database::query($sql);
  1243. $sql = "DELETE FROM $table_stats_course_access WHERE course_code = '".$virtual_course['code']."'";
  1244. Database::query($sql);
  1245. $sql = "DELETE FROM $table_stats_online WHERE course = '".$virtual_course['code']."'";
  1246. Database::query($sql);
  1247. $sql = "DELETE FROM $table_stats_default WHERE default_cours_code = '".$virtual_course['code']."'";
  1248. Database::query($sql);
  1249. $sql = "DELETE FROM $table_stats_downloads WHERE down_cours_id = '".$virtual_course['code']."'";
  1250. Database::query($sql);
  1251. $sql = "DELETE FROM $table_stats_links WHERE links_cours_id = '".$virtual_course['code']."'";
  1252. Database::query($sql);
  1253. $sql = "DELETE FROM $table_stats_uploads WHERE upload_cours_id = '".$virtual_course['code']."'";
  1254. Database::query($sql);
  1255. }
  1256. // Delete the course from the course table
  1257. $sql = "DELETE FROM $table_course WHERE code='".$virtual_course['code']."'";
  1258. Database::query($sql);
  1259. }
  1260. $sql = "SELECT * FROM $table_course WHERE code='".$code."'";
  1261. $res = Database::query($sql);
  1262. $course = Database::fetch_array($res);
  1263. if (!$_configuration['single_database']) {
  1264. $sql = "DROP DATABASE IF EXISTS ".$course['db_name'];
  1265. Database::query($sql);
  1266. } else {
  1267. //TODO Clean the following code as currently it would probably delete another course
  1268. //similarly named, by mistake...
  1269. $db_pattern = $_configuration['table_prefix'].$course['db_name'].$_configuration['db_glue'];
  1270. $sql = "SHOW TABLES LIKE '$db_pattern%'";
  1271. $result = Database::query($sql);
  1272. while (list ($courseTable) = Database::fetch_array($result)) {
  1273. Database::query("DROP TABLE $courseTable");
  1274. }
  1275. }
  1276. $course_dir = api_get_path(SYS_COURSE_PATH).$course['directory'];
  1277. $archive_dir = api_get_path(SYS_ARCHIVE_PATH).$course['directory'].'_'.time();
  1278. if (is_dir($course_dir)) {
  1279. rename($course_dir, $archive_dir);
  1280. }
  1281. }
  1282. // Unsubscribe all classes from the course
  1283. $sql = "DELETE FROM $table_course_class WHERE course_code='".$code."'";
  1284. Database::query($sql);
  1285. // Unsubscribe all users from the course
  1286. $sql = "DELETE FROM $table_course_user WHERE course_code='".$code."'";
  1287. Database::query($sql);
  1288. // Delete the course from the sessions tables
  1289. $sql = "DELETE FROM $table_session_course WHERE course_code='".$code."'";
  1290. Database::query($sql);
  1291. $sql = "DELETE FROM $table_session_course_user WHERE course_code='".$code."'";
  1292. Database::query($sql);
  1293. $sql = 'SELECT survey_id FROM '.$table_course_survey.' WHERE course_code="'.$code.'"';
  1294. $result_surveys = Database::query($sql);
  1295. while($surveys = Database::fetch_array($result_surveys)) {
  1296. $survey_id = $surveys[0];
  1297. $sql = 'DELETE FROM '.$table_course_survey_question.' WHERE survey_id="'.$survey_id.'"';
  1298. Database::query($sql);
  1299. $sql = 'DELETE FROM '.$table_course_survey_question_option.' WHERE survey_id="'.$survey_id.'"';
  1300. Database::query($sql);
  1301. $sql = 'DELETE FROM '.$table_course_survey.' WHERE survey_id="'.$survey_id.'"';
  1302. Database::query($sql);
  1303. }
  1304. // Delete the course from the stats tables
  1305. if ($stats) {
  1306. $sql = "DELETE FROM $table_stats_hotpots WHERE exe_cours_id = '".$code."'";
  1307. Database::query($sql);
  1308. $sql = "DELETE FROM $table_stats_attempt WHERE course_code = '".$code."'";
  1309. Database::query($sql);
  1310. $sql = "DELETE FROM $table_stats_exercises WHERE exe_cours_id = '".$code."'";
  1311. Database::query($sql);
  1312. $sql = "DELETE FROM $table_stats_access WHERE access_cours_code = '".$code."'";
  1313. Database::query($sql);
  1314. $sql = "DELETE FROM $table_stats_lastaccess WHERE access_cours_code = '".$code."'";
  1315. Database::query($sql);
  1316. $sql = "DELETE FROM $table_stats_course_access WHERE course_code = '".$code."'";
  1317. Database::query($sql);
  1318. $sql = "DELETE FROM $table_stats_online WHERE course = '".$code."'";
  1319. Database::query($sql);
  1320. $sql = "DELETE FROM $table_stats_default WHERE default_cours_code = '".$code."'";
  1321. Database::query($sql);
  1322. $sql = "DELETE FROM $table_stats_downloads WHERE down_cours_id = '".$code."'";
  1323. Database::query($sql);
  1324. $sql = "DELETE FROM $table_stats_links WHERE links_cours_id = '".$code."'";
  1325. Database::query($sql);
  1326. $sql = "DELETE FROM $table_stats_uploads WHERE upload_cours_id = '".$code."'";
  1327. Database::query($sql);
  1328. }
  1329. global $_configuration;
  1330. if ($_configuration['multiple_access_urls']) {
  1331. require_once api_get_path(LIBRARY_PATH).'urlmanager.lib.php';
  1332. $url_id = 1;
  1333. if (api_get_current_access_url_id() != -1) {
  1334. $url_id = api_get_current_access_url_id();
  1335. }
  1336. UrlManager::delete_url_rel_course($code, $url_id);
  1337. }
  1338. // Delete the course from the database
  1339. $sql = "DELETE FROM $table_course WHERE code='".$code."'";
  1340. Database::query($sql);
  1341. // delete extra course fields
  1342. $t_cf = Database::get_main_table(TABLE_MAIN_COURSE_FIELD);
  1343. $t_cfv = Database::get_main_table(TABLE_MAIN_COURSE_FIELD_VALUES);
  1344. $sql = "SELECT distinct field_id FROM $t_cfv WHERE course_code = '$code'";
  1345. $res_field_ids = @Database::query($sql);
  1346. while($row_field_id = Database::fetch_row($res_field_ids)){
  1347. $field_ids[] = $row_field_id[0];
  1348. }
  1349. //delete from table_course_field_value from a given course_code
  1350. $sql_course_field_value = "DELETE FROM $t_cfv WHERE course_code = '$code'";
  1351. @Database::query($sql_course_field_value);
  1352. $sql = "SELECT distinct field_id FROM $t_cfv";
  1353. $res_field_all_ids = @Database::query($sql);
  1354. while($row_field_all_id = Database::fetch_row($res_field_all_ids)){
  1355. $field_all_ids[] = $row_field_all_id[0];
  1356. }
  1357. if (is_array($field_ids) && count($field_ids) > 0) {
  1358. foreach ($field_ids as $field_id) {
  1359. // check if field id is used into table field value
  1360. if (is_array($field_all_ids)) {
  1361. if (in_array($field_id, $field_all_ids)) {
  1362. continue;
  1363. } else {
  1364. $sql_course_field = "DELETE FROM $t_cf WHERE id = '$field_id'";
  1365. Database::query($sql_course_field);
  1366. }
  1367. }
  1368. }
  1369. }
  1370. // add event to system log
  1371. $time = time();
  1372. $user_id = api_get_user_id();
  1373. event_system(LOG_COURSE_DELETE, LOG_COURSE_CODE, $code, $time, $user_id, $code);
  1374. }
  1375. /**
  1376. * Creates a file called mysql_dump.sql in the course folder
  1377. * @param $course_code The code of the course
  1378. * @todo Implementation for single database
  1379. */
  1380. public static function create_database_dump($course_code) {
  1381. global $_configuration;
  1382. if ($_configuration['single_database']) {
  1383. return;
  1384. }
  1385. $sql_dump = '';
  1386. $course_code = Database::escape_string($course_code);
  1387. $table_course = Database::get_main_table(TABLE_MAIN_COURSE);
  1388. $sql = "SELECT * FROM $table_course WHERE code = '$course_code'";
  1389. $res = Database::query($sql);
  1390. $course = Database::fetch_array($res);
  1391. $sql = "SHOW TABLES FROM ".$course['db_name'];
  1392. $res = Database::query($sql);
  1393. while ($table = Database::fetch_array($res)) {
  1394. $sql = "SELECT * FROM ".$course['db_name'].".".$table[0]."";
  1395. $res3 = Database::query($sql);
  1396. while ($row = Database::fetch_array($res3)) {
  1397. foreach ($row as $key => $value) {
  1398. $row[$key] = $key."='".addslashes($row[$key])."'";
  1399. }
  1400. $sql_dump .= "\nINSERT INTO $table[0] SET ".implode(', ', $row).';';
  1401. }
  1402. }
  1403. if (is_dir(api_get_path(SYS_COURSE_PATH).$course['directory'])) {
  1404. $file_name = api_get_path(SYS_COURSE_PATH).$course['directory'].'/mysql_dump.sql';
  1405. $handle = fopen($file_name, 'a+');
  1406. if ($handle !== false) {
  1407. fwrite($handle, $sql_dump);
  1408. fclose($handle);
  1409. } else {
  1410. //TODO trigger exception in a try-catch
  1411. }
  1412. }
  1413. }
  1414. /**
  1415. * Sort courses for a specific user ??
  1416. * @param int User ID
  1417. * @param string Course code
  1418. * @return int Minimum course order
  1419. * @todo Review documentation
  1420. */
  1421. public static function userCourseSort($user_id, $course_code) {
  1422. if ($user_id != strval(intval($user_id))) {
  1423. return false;
  1424. }
  1425. $course_code = Database::escape_string($course_code);
  1426. $TABLECOURSE = Database::get_main_table(TABLE_MAIN_COURSE);
  1427. $TABLECOURSUSER = Database::get_main_table(TABLE_MAIN_COURSE_USER);
  1428. $course_title = Database::result(Database::query('SELECT title FROM '.$TABLECOURSE.
  1429. ' WHERE code="'.$course_code.'"'), 0, 0);
  1430. $result = Database::query('SELECT course.code as code, course.title as title, cu.sort as sort FROM '.$TABLECOURSUSER.' as cu, '.$TABLECOURSE.' as course
  1431. WHERE course.code = cu.course_code
  1432. AND user_id = "'.$user_id.'"
  1433. AND cu.relation_type<>'.COURSE_RELATION_TYPE_RRHH.'
  1434. AND user_course_cat=0 ORDER BY cu.sort');
  1435. $course_title_precedent = '';
  1436. $counter = 0;
  1437. $course_found = false;
  1438. $course_sort = 1;
  1439. while ($courses = Database::fetch_array($result)){
  1440. if ($course_title_precedent == '') {
  1441. $course_title_precedent = $courses['title'];
  1442. }
  1443. if (api_strcasecmp($course_title_precedent, $course_title) < 0) {
  1444. $course_found = true;
  1445. $course_sort = $courses['sort'];
  1446. if ($counter == 0) {
  1447. $sql = 'UPDATE '.$TABLECOURSUSER.' SET sort = sort+1 WHERE user_id= "'.$user_id.'" AND relation_type<>'.COURSE_RELATION_TYPE_RRHH.' AND user_course_cat="0" AND sort > "'.$course_sort.'"';
  1448. $course_sort++;
  1449. } else {
  1450. $sql = 'UPDATE '.$TABLECOURSUSER.' SET sort = sort+1 WHERE user_id= "'.$user_id.'" AND relation_type<>'.COURSE_RELATION_TYPE_RRHH.' AND user_course_cat="0" AND sort >= "'.$course_sort.'"';
  1451. }
  1452. Database::query($sql);
  1453. break;
  1454. } else {
  1455. $course_title_precedent = $courses['title'];
  1456. }
  1457. $counter++;
  1458. }
  1459. // We must register the course in the beginning of the list
  1460. if (Database::num_rows($result) > 0 && !$course_found) {
  1461. $course_sort = Database::result(Database::query('SELECT min(sort) as min_sort FROM '.$TABLECOURSUSER.
  1462. ' WHERE user_id="'.$user_id.'" AND user_course_cat="0"'), 0, 0);
  1463. Database::query('UPDATE '.$TABLECOURSUSER.' SET sort = sort+1
  1464. WHERE user_id= "'.$user_id.'" AND user_course_cat="0"');
  1465. }
  1466. return $course_sort;
  1467. }
  1468. /**
  1469. * create recursively all categories as option of the select passed in paramater.
  1470. *
  1471. * @param object $select_element the quickform select where the options will be added
  1472. * @param string $category_selected_code the option value to select by default (used mainly for edition of courses)
  1473. * @param string $parent_code the parent category of the categories added (default=null for root category)
  1474. * @param string $padding the indent param (you shouldn't indicate something here)
  1475. */
  1476. public static function select_and_sort_categories($select_element, $category_selected_code = '', $parent_code = null , $padding = '') {
  1477. $res = Database::query("SELECT code, name, auth_course_child, auth_cat_child
  1478. FROM ".Database::get_main_table(TABLE_MAIN_CATEGORY)."
  1479. WHERE parent_id ".(is_null($parent_code) ? "IS NULL" : "='".Database::escape_string($parent_code)."'")."
  1480. ORDER BY code");
  1481. while ($cat = Database::fetch_array($res)) {
  1482. $params = $cat['auth_course_child'] == 'TRUE' ? '' : 'disabled';
  1483. $params .= ($cat['code'] == $category_selected_code) ? ' selected' : '';
  1484. $select_element->addOption($padding.'('.$cat['code'].') '.$cat['name'], $cat['code'], $params);
  1485. if ($cat['auth_cat_child']) {
  1486. self::select_and_sort_categories($select_element, $category_selected_code, $cat['code'], $padding.' - ');
  1487. }
  1488. }
  1489. }
  1490. /**
  1491. * check if course exists
  1492. * @param string course_code
  1493. * @param string whether to accept virtual course codes or not
  1494. * @return true if exists, false else
  1495. */
  1496. public static function course_exists($course_code, $accept_virtual = false) {
  1497. if ($accept_virtual === true) {
  1498. $sql = 'SELECT 1 FROM '.Database::get_main_table(TABLE_MAIN_COURSE).' WHERE code="'.Database::escape_string($course_code).'" OR visual_code="'.Database::escape_string($course_code).'"';
  1499. } else {
  1500. $sql = 'SELECT 1 FROM '.Database::get_main_table(TABLE_MAIN_COURSE).' WHERE code="'.Database::escape_string($course_code).'"';
  1501. }
  1502. return Database::num_rows(Database::query($sql));
  1503. }
  1504. /**
  1505. * Send an email to tutor after the auth-suscription of a student in your course
  1506. * @author Carlos Vargas <carlos.vargas@dokeos.com>, Dokeos Latino
  1507. * @param int $user_id the id of the user
  1508. * @param string $course_code the course code
  1509. * @param string $send_to_tutor_also
  1510. * @return string we return the message that is displayed when the action is succesfull
  1511. */
  1512. public static function email_to_tutor($user_id, $course_code, $send_to_tutor_also = false) {
  1513. if ($user_id != strval(intval($user_id))) {
  1514. return false;
  1515. }
  1516. $course_code = Database::escape_string($course_code);
  1517. $student = Database::fetch_array(Database::query("SELECT * FROM ".Database::get_main_table(TABLE_MAIN_USER)."
  1518. WHERE user_id='".$user_id."'"));
  1519. $information = self::get_course_information($course_code);
  1520. $name_course = $information['title'];
  1521. $sql = "SELECT * FROM ".Database::get_main_table(TABLE_MAIN_COURSE_USER)." WHERE course_code='".$course_code."'";
  1522. // TODO: Ivan: This is a mistake, please, have a look at it. Intention here is diffcult to be guessed.
  1523. //if ($send_to_tutor_also = true) {
  1524. // Proposed change:
  1525. if ($send_to_tutor_also) {
  1526. //
  1527. $sql .= " AND tutor_id=1";
  1528. } else {
  1529. $sql .= " AND status=1";
  1530. }
  1531. $result = Database::query($sql);
  1532. while ($row = Database::fetch_array($result)) {
  1533. $tutor = Database::fetch_array(Database::query("SELECT * FROM ".Database::get_main_table(TABLE_MAIN_USER)."
  1534. WHERE user_id='".$row['user_id']."'"));
  1535. $emailto = $tutor['email'];
  1536. $emailsubject = get_lang('NewUserInTheCourse').': '.$name_course;
  1537. $emailbody = get_lang('Dear').': '. api_get_person_name($tutor['firstname'], $tutor['lastname'])."\n";
  1538. $emailbody .= get_lang('MessageNewUserInTheCourse').': '.$name_course."\n";
  1539. $emailbody .= get_lang('UserName').': '.$student['username']."\n";
  1540. if (api_is_western_name_order()) {
  1541. $emailbody .= get_lang('FirstName').': '.$student['firstname']."\n";
  1542. $emailbody .= get_lang('LastName').': '.$student['lastname']."\n";
  1543. } else {
  1544. $emailbody .= get_lang('LastName').': '.$student['lastname']."\n";
  1545. $emailbody .= get_lang('FirstName').': '.$student['firstname']."\n";
  1546. }
  1547. $emailbody .= get_lang('Email').': '.$student['email']."\n\n";
  1548. $recipient_name = api_get_person_name($tutor['firstname'], $tutor['lastname'], null, PERSON_NAME_EMAIL_ADDRESS);
  1549. $sender_name = api_get_person_name(api_get_setting('administratorName'), api_get_setting('administratorSurname'), null, PERSON_NAME_EMAIL_ADDRESS);
  1550. $email_admin = api_get_setting('emailAdministrator');
  1551. @api_mail($recipient_name, $emailto, $emailsubject, $emailbody, $sender_name,$email_admin);
  1552. }
  1553. }
  1554. /**
  1555. * Get list of courses for a given user
  1556. * @param int user ID
  1557. * @param boolean Whether to include courses from session or not
  1558. * @return array List of codes and db names
  1559. * @author isaac flores paz
  1560. */
  1561. public static function get_courses_list_by_user_id($user_id, $include_sessions = false) {
  1562. $user_id = intval($user_id);
  1563. $course_list = array();
  1564. $codes = array();
  1565. $tbl_course = Database::get_main_table(TABLE_MAIN_COURSE);
  1566. $tbl_course_user = Database::get_main_table(TABLE_MAIN_COURSE_USER);
  1567. $tbl_course_field = Database :: get_main_table(TABLE_MAIN_COURSE_FIELD);
  1568. $tbl_course_field_value = Database :: get_main_table(TABLE_MAIN_COURSE_FIELD_VALUES);
  1569. $tbl_user_course_category = Database :: get_user_personal_table(TABLE_USER_COURSE_CATEGORY);
  1570. // get course list auto-register
  1571. $sql = "SELECT DISTINCT(course_code) FROM $tbl_course_field_value tcfv INNER JOIN $tbl_course_field tcf ON " .
  1572. " tcfv.field_id = tcf.id WHERE tcf.field_variable = 'special_course' AND tcfv.field_value = 1 ";
  1573. $special_course_result = Database::query($sql);
  1574. if(Database::num_rows($special_course_result)>0) {
  1575. $special_course_list = array();
  1576. while ($result_row = Database::fetch_array($special_course_result)) {
  1577. $special_course_list[] = '"'.$result_row['course_code'].'"';
  1578. }
  1579. }
  1580. $with_special_courses = $without_special_courses = '';
  1581. if (!empty($special_course_list)) {
  1582. $with_special_courses = ' course.code IN ('.implode(',',$special_course_list).')';
  1583. $without_special_courses = ' AND course.code NOT IN ('.implode(',',$special_course_list).')';
  1584. }
  1585. if (!empty($with_special_courses)) {
  1586. $sql = "SELECT DISTINCT(course.code), course.db_name db_name, course.title
  1587. FROM ".$tbl_course_user." course_rel_user
  1588. LEFT JOIN ".$tbl_course." course
  1589. ON course.code = course_rel_user.course_code
  1590. LEFT JOIN ".$tbl_user_course_category." user_course_category
  1591. ON course_rel_user.user_course_cat = user_course_category.id
  1592. WHERE $with_special_courses
  1593. GROUP BY course.code
  1594. ORDER BY user_course_category.sort,course.title,course_rel_user.sort ASC";
  1595. $rs_special_course = Database::query($sql);
  1596. if (Database::num_rows($rs_special_course) > 0) {
  1597. while ($result_row = Database::fetch_array($rs_special_course)) {
  1598. $result_row['special_course'] = 1;
  1599. $course_list[] = $result_row;
  1600. $codes[] = $result_row['code'];
  1601. }
  1602. }
  1603. }
  1604. // get course list not auto-register. Use Distinct to avoid multiple
  1605. // entries when a course is assigned to a HRD (DRH) as watcher
  1606. $sql = "SELECT DISTINCT(course.code),course.db_name,course.title
  1607. FROM $tbl_course course
  1608. INNER JOIN $tbl_course_user cru
  1609. ON course.code=cru.course_code
  1610. WHERE cru.user_id='$user_id' $without_special_courses";
  1611. $result = Database::query($sql);
  1612. if (Database::num_rows($result)) {
  1613. while ($row = Database::fetch_array($result, 'ASSOC')) {
  1614. $course_list[] = $row;
  1615. $codes[] = $row['code'];
  1616. }
  1617. }
  1618. if ($include_sessions === true) {
  1619. $r = Database::query("SELECT DISTINCT(c.code),c.db_name,c.title
  1620. FROM ".Database::get_main_table(TABLE_MAIN_SESSION_COURSE_USER)." s, ".Database::get_main_table(TABLE_MAIN_COURSE)." c
  1621. WHERE id_user = $user_id AND s.course_code=c.code");
  1622. while ($row = Database::fetch_array($r, 'ASSOC')) {
  1623. if (!in_array($row['code'], $codes)) {
  1624. $course_list[] = $row;
  1625. }
  1626. }
  1627. }
  1628. return $course_list;
  1629. }
  1630. /**
  1631. * Get course ID from a given course directory name
  1632. * @param string Course directory (without any slash)
  1633. * @return string Course code, or false if not found
  1634. */
  1635. public static function get_course_id_from_path ($path) {
  1636. $path = Database::escape_string(str_replace('.', '', str_replace('/', '', $path)));
  1637. $res = Database::query("SELECT code FROM ".Database::get_main_table(TABLE_MAIN_COURSE)."
  1638. WHERE directory LIKE BINARY '$path'");
  1639. if ($res === false) {
  1640. return false;
  1641. }
  1642. if (Database::num_rows($res) != 1) {
  1643. return false;
  1644. }
  1645. $row = Database::fetch_array($res);
  1646. return $row['code'];
  1647. }
  1648. /**
  1649. * Get course code(s) from visual code
  1650. * @param string Visual code
  1651. * @return array List of codes for the given visual code
  1652. */
  1653. public static function get_courses_info_from_visual_code($code) {
  1654. $result = array();
  1655. $sql_result = Database::query("SELECT * FROM ".Database::get_main_table(TABLE_MAIN_COURSE)."
  1656. WHERE visual_code = '".Database::escape_string($code)."'");
  1657. while ($virtual_course = Database::fetch_array($sql_result)) {
  1658. $result[] = $virtual_course;
  1659. }
  1660. return $result;
  1661. }
  1662. /**
  1663. * Get emails of tutors to course
  1664. * @param string Visual code
  1665. * @return array List of emails of tutors to course
  1666. * @author @author Carlos Vargas <carlos.vargas@dokeos.com>, Dokeos Latino
  1667. * */
  1668. public static function get_emails_of_tutors_to_course($code) {
  1669. $list = array();
  1670. $res = Database::query("SELECT user_id FROM ".Database::get_main_table(TABLE_MAIN_COURSE_USER)."
  1671. WHERE course_code='".Database::escape_string($code)."' AND status=1");
  1672. while ($list_users = Database::fetch_array($res)) {
  1673. $result = Database::query("SELECT * FROM ".Database::get_main_table(TABLE_MAIN_USER)."
  1674. WHERE user_id=".$list_users['user_id']);
  1675. while ($row_user = Database::fetch_array($result)){
  1676. $name_teacher = api_get_person_name($row_user['firstname'], $row_user['lastname'], null, PERSON_NAME_EMAIL_ADDRESS);
  1677. $list[] = array($row_user['email'] => $name_teacher);
  1678. }
  1679. }
  1680. return $list;
  1681. }
  1682. /**
  1683. * Get coachs' emails by session
  1684. * @param int session id
  1685. * @param string course code
  1686. * @return array array(email => name_tutor) by coach
  1687. * @author Carlos Vargas <carlos.vargas@dokeos.com>
  1688. */
  1689. public static function get_email_of_tutor_to_session($session_id,$course_code) {
  1690. $tbl_session_course_user = Database::get_main_table(TABLE_MAIN_SESSION_COURSE_USER);
  1691. $tbl_user = Database::get_main_table(TABLE_MAIN_USER);
  1692. $coachs_emails = array();
  1693. $course_code = Database::escape_string($course_code);
  1694. $session_id = intval($session_id);
  1695. $sql = "SELECT id_user FROM $tbl_session_course_user WHERE id_session='$session_id' AND course_code='$course_code' AND status =2";
  1696. $rs = Database::query($sql);
  1697. if (Database::num_rows($rs) > 0) {
  1698. $user_ids = array();
  1699. while ($row = Database::fetch_array($rs)) {
  1700. $user_ids[] = $row['id_user'];
  1701. }
  1702. $sql = "SELECT firstname,lastname,email FROM $tbl_user WHERE user_id IN (".implode(",",$user_ids).")";
  1703. $rs_user = Database::query($sql);
  1704. while ($row_emails = Database::fetch_array($rs_user)) {
  1705. $name_tutor = api_get_person_name($row_emails['firstname'], $row_emails['lastname'], null, PERSON_NAME_EMAIL_ADDRESS);
  1706. $mail_tutor = array($row_emails['email'] => $name_tutor);
  1707. $coachs_emails[] = $mail_tutor;
  1708. }
  1709. }
  1710. return $coachs_emails;
  1711. }
  1712. /**
  1713. * Creates a new extra field for a given course
  1714. * @param string Field's internal variable name
  1715. * @param int Field's type
  1716. * @param string Field's language var name
  1717. * @return int new extra field id
  1718. */
  1719. public static function create_course_extra_field($fieldvarname, $fieldtype, $fieldtitle) {
  1720. // database table definition
  1721. $t_cfv = Database::get_main_table(TABLE_MAIN_COURSE_FIELD_VALUES);
  1722. $t_cf = Database::get_main_table(TABLE_MAIN_COURSE_FIELD);
  1723. $fieldvarname = Database::escape_string($fieldvarname);
  1724. $fieldtitle = Database::escape_string($fieldtitle);
  1725. $fieldtype = (int)$fieldtype;
  1726. $time = time();
  1727. $sql_field = "SELECT id FROM $t_cf WHERE field_variable = '$fieldvarname'";
  1728. $res_field = Database::query($sql_field);
  1729. $r_field = Database::fetch_row($res_field);
  1730. if (Database::num_rows($res_field) > 0) {
  1731. return $r_field[0];
  1732. }
  1733. // save new fieldlabel into course_field table
  1734. $sql = "SELECT MAX(field_order) FROM $t_cf";
  1735. $res = Database::query($sql);
  1736. $order = 0;
  1737. if (Database::num_rows($res) > 0) {
  1738. $row = Database::fetch_row($res);
  1739. $order = $row[0] + 1;
  1740. }
  1741. $sql = "INSERT INTO $t_cf
  1742. SET field_type = '$fieldtype',
  1743. field_variable = '$fieldvarname',
  1744. field_display_text = '$fieldtitle',
  1745. field_order = '$order',
  1746. tms = FROM_UNIXTIME($time)";
  1747. Database::query($sql);
  1748. return Database::insert_id();
  1749. }
  1750. /**
  1751. * Updates course attribute. Note that you need to check that your attribute is valid before you use this function
  1752. *
  1753. * @param int Course id
  1754. * @param string Attribute name
  1755. * @param string Attribute value
  1756. * @return bool True if attribute was successfully updated, false if course was not found or attribute name is invalid
  1757. */
  1758. public static function update_attribute($id, $name, $value) {
  1759. $id = (int)$id;
  1760. $table = Database::get_main_table(TABLE_MAIN_COURSE);
  1761. $sql = "UPDATE $table SET $name = '".Database::escape_string($value)."' WHERE id = '$id';";
  1762. return Database::query($sql);
  1763. }
  1764. /**
  1765. * Update course attributes. Will only update attributes with a non-empty value. Note that you NEED to check that your attributes are valid before using this function
  1766. *
  1767. * @param int Course id
  1768. * @param array Associative array with field names as keys and field values as values
  1769. * @return bool True if update was successful, false otherwise
  1770. */
  1771. public static function update_attributes($id, $attributes) {
  1772. $id = (int)$id;
  1773. $table = Database::get_main_table(TABLE_MAIN_COURSE);
  1774. $sql = "UPDATE $table SET ";
  1775. $i = 0;
  1776. foreach($attributes as $name => $value) {
  1777. if($value != '') {
  1778. if($i > 0) {
  1779. $sql .= ", ";
  1780. }
  1781. $sql .= " $name = '".Database::escape_string($value)."'";
  1782. $i++;
  1783. }
  1784. }
  1785. $sql .= " WHERE id = '$id';";
  1786. return Database::query($sql);
  1787. }
  1788. /**
  1789. * Update an extra field value for a given course
  1790. * @param integer Course ID
  1791. * @param string Field variable name
  1792. * @param string Field value
  1793. * @return boolean true if field updated, false otherwise
  1794. */
  1795. public static function update_course_extra_field_value($course_code, $fname, $fvalue = '') {
  1796. $t_cfv = Database::get_main_table(TABLE_MAIN_COURSE_FIELD_VALUES);
  1797. $t_cf = Database::get_main_table(TABLE_MAIN_COURSE_FIELD);
  1798. $fname = Database::escape_string($fname);
  1799. $course_code = Database::escape_string($course_code);
  1800. $fvalues = '';
  1801. if (is_array($fvalue)) {
  1802. foreach ($fvalue as $val) {
  1803. $fvalues .= Database::escape_string($val).';';
  1804. }
  1805. if (!empty($fvalues)) {
  1806. $fvalues = substr($fvalues, 0, -1);
  1807. }
  1808. } else {
  1809. $fvalues = Database::escape_string($fvalue);
  1810. }
  1811. $sqlcf = "SELECT * FROM $t_cf WHERE field_variable='$fname'";
  1812. $rescf = Database::query($sqlcf);
  1813. if (Database::num_rows($rescf) == 1) {
  1814. // Ok, the field exists
  1815. // Check if enumerated field, if the option is available
  1816. $rowcf = Database::fetch_array($rescf);
  1817. $tms = time();
  1818. $sqlcfv = "SELECT * FROM $t_cfv WHERE course_code = '$course_code' AND field_id = '".$rowcf['id']."' ORDER BY id";
  1819. $rescfv = Database::query($sqlcfv);
  1820. $n = Database::num_rows($rescfv);
  1821. if ($n > 1) {
  1822. //problem, we already have to values for this field and user combination - keep last one
  1823. while ($rowcfv = Database::fetch_array($rescfv)) { // See the TODO note below.
  1824. if ($n > 1) {
  1825. $sqld = "DELETE FROM $t_cfv WHERE id = ".$rowcfv['id'];
  1826. $resd = Database::query($sqld);
  1827. $n--;
  1828. }
  1829. $rowcfv = Database::fetch_array($rescfv);
  1830. if ($rowcfv['field_value'] != $fvalues) {
  1831. $sqlu = "UPDATE $t_cfv SET field_value = '$fvalues', tms = FROM_UNIXTIME($tms) WHERE id = ".$rowcfv['id'];
  1832. $resu = Database::query($sqlu);
  1833. return ($resu ? true : false);
  1834. }
  1835. return true; // TODO: Sure exit from the function occures in this "while" cycle. Logic should checked. Maybe "if" instead of "while"? It is not clear...
  1836. }
  1837. } elseif ($n == 1) {
  1838. //we need to update the current record
  1839. $rowcfv = Database::fetch_array($rescfv);
  1840. if ($rowcfv['field_value'] != $fvalues) {
  1841. $sqlu = "UPDATE $t_cfv SET field_value = '$fvalues', tms = FROM_UNIXTIME($tms) WHERE id = ".$rowcfv['id'];
  1842. //error_log('UM::update_extra_field_value: '.$sqlu);
  1843. $resu = Database::query($sqlu);
  1844. return ($resu ? true : false);
  1845. }
  1846. return true;
  1847. } else {
  1848. $sqli = "INSERT INTO $t_cfv (course_code,field_id,field_value,tms) " .
  1849. "VALUES ('$course_code',".$rowcf['id'].",'$fvalues',FROM_UNIXTIME($tms))";
  1850. //error_log('UM::update_extra_field_value: '.$sqli);
  1851. $resi = Database::query($sqli);
  1852. return ($resi ? true : false);
  1853. }
  1854. } else {
  1855. return false; //field not found
  1856. }
  1857. }
  1858. /**
  1859. * Get the course id of an course by the database name
  1860. * @param string The database name
  1861. * @return string The course id
  1862. */
  1863. public static function get_course_id_by_database_name($db_name) {
  1864. return Database::result(Database::query('SELECT code FROM '.Database::get_main_table(TABLE_MAIN_COURSE).
  1865. ' WHERE db_name="'.Database::escape_string($db_name).'"'), 0, 'code');
  1866. }
  1867. public static function get_session_category_id_by_session_id($session_id) {
  1868. return Database::result(Database::query('SELECT sc.id session_category
  1869. FROM '.Database::get_main_table(TABLE_MAIN_SESSION_CATEGORY).' sc
  1870. INNER JOIN '.Database::get_main_table(TABLE_MAIN_SESSION).' s
  1871. ON sc.id=s.session_category_id WHERE s.id="'.Database::escape_string($session_id).'"'),
  1872. 0, 'session_category');
  1873. }
  1874. /**
  1875. * Get the course id of an course by the database name
  1876. * @param string The database name
  1877. * @return string The course id
  1878. */
  1879. public static function get_course_extra_field_list($code) {
  1880. $tbl_course_field = Database::get_main_table(TABLE_MAIN_COURSE_FIELD);
  1881. $tbl_course_field_value = Database::get_main_table(TABLE_MAIN_COURSE_FIELD_VALUES);
  1882. $sql_field = "SELECT id, field_type, field_variable, field_display_text, field_default_value
  1883. FROM $tbl_course_field WHERE field_visible = '1' ";
  1884. $res_field = Database::query($sql_field);
  1885. $extra_fields = array();
  1886. while($rowcf = Database::fetch_array($res_field)) {
  1887. $extra_field_id = $rowcf['id'];
  1888. $sql_field_value = "SELECT field_value FROM $tbl_course_field_value WHERE course_code = '$code' AND field_id = '$extra_field_id' ";
  1889. $res_field_value = Database::query($sql_field_value);
  1890. if(Database::num_rows($res_field_value) > 0 ) {
  1891. $r_field_value = Database::fetch_row($res_field_value);
  1892. $rowcf['extra_field_value'] = $r_field_value[0];
  1893. }
  1894. $extra_fields[] = $rowcf;
  1895. }
  1896. return $extra_fields;
  1897. }
  1898. /**
  1899. * Gets the value of a course extra field. Returns null if it was not found
  1900. *
  1901. * @param string Name of the extra field
  1902. * @param string Course code
  1903. * @return string Value
  1904. */
  1905. public static function get_course_extra_field_value($field_name, $code) {
  1906. $tbl_course_field = Database::get_main_table(TABLE_MAIN_COURSE_FIELD);
  1907. $tbl_course_field_value = Database::get_main_table(TABLE_MAIN_COURSE_FIELD_VALUES);
  1908. $sql = "SELECT id FROM $tbl_course_field WHERE field_visible = '1' AND field_variable = '$field_name';";
  1909. $res = Database::query($sql);
  1910. $row = Database::fetch_object($res);
  1911. if(!$row) {
  1912. return null;
  1913. } else {
  1914. $sql_field_value = "SELECT field_value FROM $tbl_course_field_value WHERE course_code = '$code' AND field_id = '{$row->id}';";
  1915. $res_field_value = Database::query($sql_field_value);
  1916. $row_field_value = Database::fetch_object($res_field_value);
  1917. if(!$row_field_value) {
  1918. return null;
  1919. } else {
  1920. return $row_field_value['field_value'];
  1921. }
  1922. }
  1923. }
  1924. /**
  1925. * Get the database name of a course by the code
  1926. * @param string The course code
  1927. * @return string The database name
  1928. */
  1929. public static function get_name_database_course($course_code) {
  1930. return Database::result(Database::query('SELECT db_name FROM '.Database::get_main_table(TABLE_MAIN_COURSE).
  1931. ' WHERE code="'.Database::escape_string($course_code).'"'), 0, 'db_name');
  1932. }
  1933. /**
  1934. * Lists details of the course description
  1935. * @param array The course description
  1936. * @param string The encoding
  1937. * @param bool If true is displayed if false is hidden
  1938. * @return string The course description in html
  1939. */
  1940. public static function get_details_course_description_html($descriptions, $charset, $action_show = true) {
  1941. if (isset($descriptions) && count($descriptions) > 0) {
  1942. $data = '';
  1943. foreach ($descriptions as $id => $description) {
  1944. $data .= '<div class="sectiontitle">';
  1945. if (api_is_allowed_to_edit() && $action_show) {
  1946. //delete
  1947. $data .= '<a href="'.api_get_self().'?'.api_get_cidreq().'&amp;action=delete&amp;description_id='.$description->id.'" onclick="javascript:if(!confirm(\''.addslashes(api_htmlentities(get_lang('ConfirmYourChoice'), ENT_QUOTES, $charset)).'\')) return false;">';
  1948. $data .= Display::return_icon('delete.gif', get_lang('Delete'), array('style' => 'vertical-align:middle;float:right;'));
  1949. $data .= '</a> ';
  1950. //edit
  1951. $data .= '<a href="'.api_get_self().'?'.api_get_cidreq().'&amp;description_id='.$description->id.'">';
  1952. $data .= Display::return_icon('edit.gif', get_lang('Edit'), array('style' => 'vertical-align:middle;float:right; padding-right:4px;'));
  1953. $data .= '</a> ';
  1954. }
  1955. $data .= $description->title;
  1956. $data .= '</div>';
  1957. $data .= '<div class="sectioncomment">';
  1958. $data .= text_filter($description->content);
  1959. $data .= '</div>';
  1960. }
  1961. } else {
  1962. $data .= '<em>'.get_lang('ThisCourseDescriptionIsEmpty').'</em>';
  1963. }
  1964. return $data;
  1965. }
  1966. /**
  1967. * Returns the details of a course category
  1968. *
  1969. * @param string Category code
  1970. * @return array Course category
  1971. */
  1972. public static function get_course_category($code) {
  1973. $table_categories = Database::get_main_table(TABLE_MAIN_CATEGORY);
  1974. $sql = "SELECT * FROM $table_categories WHERE code = '$code';";
  1975. return Database::fetch_array(Database::query($sql));
  1976. }
  1977. /*
  1978. ==============================================================================
  1979. DEPRECATED METHODS
  1980. ==============================================================================
  1981. */
  1982. /**
  1983. * This code creates a select form element to let the user
  1984. * choose a real course to link to.
  1985. *
  1986. * A good non-display library should not use echo statements, but just return text/html
  1987. * so users of the library can choose when to display.
  1988. *
  1989. * We display the course code, but internally store the course id.
  1990. *
  1991. * @param boolean $has_size, true the select tag gets a size element, false it stays a dropdownmenu
  1992. * @param boolean $only_current_user_courses, true only the real courses of which the
  1993. * current user is course admin are displayed, false all real courses are shown.
  1994. * @param string $element_name the name of the select element
  1995. * @return a string containing html code for a form select element.
  1996. * @deprecated Function not in use
  1997. */
  1998. public static function get_real_course_code_select_html($element_name, $has_size = true, $only_current_user_courses = true, $user_id) {
  1999. if ($only_current_user_courses) {
  2000. $real_course_list = self::get_real_course_list_of_user_as_course_admin($user_id);
  2001. } else {
  2002. $real_course_list = self::get_real_course_list();
  2003. }
  2004. if ($has_size) {
  2005. $size_element = "size=\"".SELECT_BOX_SIZE."\"";
  2006. } else {
  2007. $size_element = "";
  2008. }
  2009. $html_code = "<select name=\"$element_name\" $size_element >\n";
  2010. foreach ($real_course_list as $real_course) {
  2011. $course_code = $real_course["code"];
  2012. $html_code .= "<option value=\"".$course_code."\">";
  2013. $html_code .= $course_code;
  2014. $html_code .= "</option>\n";
  2015. }
  2016. $html_code .= "</select>\n";
  2017. return $html_code;
  2018. }
  2019. /**
  2020. * Get count rows of a table inside a course database
  2021. * @param string The table of which the rows should be counted
  2022. * @param int optionally count rows by session id
  2023. * @return int The number of rows in the given table.
  2024. */
  2025. public static function count_rows_course_table($table, $session_id = '') {
  2026. $condition_session = '';
  2027. if ($session_id !== '') {
  2028. $session_id = intval($session_id);
  2029. $condition_session = " WHERE session_id = '$session_id' ";
  2030. }
  2031. $sql = "SELECT COUNT(*) AS n FROM $table $condition_session ";
  2032. $rs = Database::query($sql);
  2033. $row = Database::fetch_row($rs);
  2034. return $row[0];
  2035. }
  2036. /**
  2037. * Subscribes courses to human resource manager (Dashboard feature)
  2038. * @param int Human Resource Manager id
  2039. * @param array Courses code
  2040. * @param int Relation type
  2041. **/
  2042. public static function suscribe_courses_to_hr_manager($hr_manager_id,$courses_list) {
  2043. global $_configuration;
  2044. // Database Table Definitions
  2045. $tbl_course = Database::get_main_table(TABLE_MAIN_COURSE);
  2046. $tbl_course_rel_user = Database::get_main_table(TABLE_MAIN_COURSE_USER);
  2047. $tbl_course_rel_access_url = Database::get_main_table(TABLE_MAIN_ACCESS_URL_REL_COURSE);
  2048. $hr_manager_id = intval($hr_manager_id);
  2049. $affected_rows = 0;
  2050. //Deleting assigned courses to hrm_id
  2051. if ($_configuration['multiple_access_urls']) {
  2052. $sql = "SELECT s.course_code FROM $tbl_course_rel_user s INNER JOIN $tbl_course_rel_access_url a ON (a.course_code = s.course_code) WHERE user_id = $hr_manager_id AND relation_type=".COURSE_RELATION_TYPE_RRHH." AND access_url_id = ".api_get_current_access_url_id()."";
  2053. } else {
  2054. $sql = "SELECT course_code FROM $tbl_course_rel_user WHERE user_id = $hr_manager_id AND relation_type=".COURSE_RELATION_TYPE_RRHH." ";
  2055. }
  2056. $result = Database::query($sql);
  2057. if (Database::num_rows($result) > 0) {
  2058. while ($row = Database::fetch_array($result)) {
  2059. $sql = "DELETE FROM $tbl_course_rel_user WHERE course_code = '{$row['course_code']}' AND user_id = $hr_manager_id AND relation_type=".COURSE_RELATION_TYPE_RRHH." ";
  2060. Database::query($sql);
  2061. }
  2062. }
  2063. // inserting new courses list
  2064. if (is_array($courses_list)) {
  2065. foreach ($courses_list as $course_code) {
  2066. $course_code = Database::escape_string($course_code);
  2067. $insert_sql = "INSERT IGNORE INTO $tbl_course_rel_user(course_code, user_id, status, relation_type) VALUES('$course_code', $hr_manager_id, '".DRH."', '".COURSE_RELATION_TYPE_RRHH."')";
  2068. Database::query($insert_sql);
  2069. if (Database::affected_rows()) {
  2070. $affected_rows++;
  2071. }
  2072. }
  2073. }
  2074. return $affected_rows;
  2075. }
  2076. /**
  2077. * get courses followed by human resources manager
  2078. * @param int human resources manager id
  2079. * @return array courses
  2080. */
  2081. public static function get_courses_followed_by_drh($hr_dept_id) {
  2082. global $_configuration;
  2083. // Database Table Definitions
  2084. $tbl_course = Database::get_main_table(TABLE_MAIN_COURSE);
  2085. $tbl_course_rel_user = Database::get_main_table(TABLE_MAIN_COURSE_USER);
  2086. $tbl_course_rel_access_url = Database::get_main_table(TABLE_MAIN_ACCESS_URL_REL_COURSE);
  2087. $hr_dept_id = intval($hr_dept_id);
  2088. $assigned_courses_to_hrm = array();
  2089. if ($_configuration['multiple_access_urls']) {
  2090. $sql = "SELECT * FROM $tbl_course c
  2091. INNER JOIN $tbl_course_rel_user cru ON (cru.course_code = c.code) LEFT JOIN $tbl_course_rel_access_url a ON (a.course_code = c.code) WHERE cru.user_id = '$hr_dept_id' AND status = ".DRH." AND relation_type = '".COURSE_RELATION_TYPE_RRHH."' AND access_url_id = ".api_get_current_access_url_id()."";
  2092. } else {
  2093. $sql = "SELECT * FROM $tbl_course c
  2094. INNER JOIN $tbl_course_rel_user cru ON cru.course_code = c.code AND cru.user_id = '$hr_dept_id' AND status = ".DRH." AND relation_type = '".COURSE_RELATION_TYPE_RRHH."' ";
  2095. }
  2096. $rs_assigned_courses = Database::query($sql);
  2097. if (Database::num_rows($rs_assigned_courses) > 0) {
  2098. while ($row_assigned_courses = Database::fetch_array($rs_assigned_courses)) {
  2099. $assigned_courses_to_hrm[$row_assigned_courses['code']] = $row_assigned_courses;
  2100. }
  2101. }
  2102. return $assigned_courses_to_hrm;
  2103. }
  2104. /**
  2105. * check if a course is special (autoregister)
  2106. * @param string course code
  2107. */
  2108. public static function is_special_course($course_code){
  2109. $tbl_course_field_value = Database::get_main_table(TABLE_MAIN_COURSE_FIELD_VALUES);
  2110. $tbl_course_field = Database::get_main_table(TABLE_MAIN_COURSE_FIELD);
  2111. $is_special = false;
  2112. $sql = "SELECT course_code FROM $tbl_course_field_value tcfv INNER JOIN $tbl_course_field tcf ON " .
  2113. " tcfv.field_id = tcf.id WHERE tcf.field_variable = 'special_course' AND tcfv.field_value = 1 AND course_code='$course_code'";
  2114. $result = Database::query($sql);
  2115. $num_rows = Database::num_rows($result);
  2116. if ($num_rows > 0){
  2117. $is_special = true;
  2118. }
  2119. return $is_special;
  2120. }
  2121. /**
  2122. * Update course picture
  2123. * @param string Course code
  2124. * @param string File name
  2125. * @param string The full system name of the image from which course picture will be created.
  2126. * @return bool Returns the resulting. In case of internal error or negative validation returns FALSE.
  2127. */
  2128. public static function update_course_picture($course_code, $filename, $source_file = null) {
  2129. $course_info = api_get_course_info($course_code);
  2130. $store_path = api_get_path(SYS_COURSE_PATH).$course_info['path']; // course path
  2131. $course_image = $store_path.'/course-pic.png'; // image name for courses
  2132. $course_medium_image = $store_path.'/course-pic85x85.png';
  2133. $extension = strtolower(substr(strrchr($filename, '.'), 1));
  2134. $result = false;
  2135. $allowed_picture_types = array ('jpg', 'jpeg', 'png', 'gif');
  2136. if (in_array($extension, $allowed_picture_types)) {
  2137. if (file_exists($course_image)) {
  2138. @unlink($course_image);
  2139. }
  2140. if (file_exists($course_medium_image)) {
  2141. @unlink($course_medium_image);
  2142. }
  2143. if ($extension != 'png') {
  2144. // convert image to png extension
  2145. if ($extension == 'jpg' || $extension == 'jpeg') {
  2146. $image = imagecreatefromjpeg($source_file);
  2147. } else {
  2148. $image = imagecreatefromgif($source_file);
  2149. }
  2150. ob_start();
  2151. imagepng($image);
  2152. $imagevariable = ob_get_contents();
  2153. ob_end_clean();
  2154. // save picture
  2155. if (@file_put_contents($course_image, $imagevariable)) {
  2156. $result = true;
  2157. }
  2158. } else {
  2159. $result = @move_uploaded_file($source_file, $course_image);
  2160. }
  2161. }
  2162. // redimension image to 85x85
  2163. if ($result) {
  2164. $max_size_for_picture = 85;
  2165. if (!class_exists('image')) {
  2166. require_once api_get_path(LIBRARY_PATH).'image.lib.php';
  2167. }
  2168. $medium = new image($course_image);
  2169. $picture_infos = api_getimagesize($course_image);
  2170. if ($picture_infos[0] > $max_size_for_picture) {
  2171. $thumbwidth = $max_size_for_picture;
  2172. $new_height = $max_size_for_picture; //round(($thumbwidth / $picture_infos[0]) * $picture_infos[1]);
  2173. //if ($new_height > $max_size_for_picture) { $new_height = $thumbwidth;}
  2174. $medium->resize($thumbwidth, $new_height, 0, true);
  2175. }
  2176. $rs = $medium->send_image('PNG', $store_path.'/course-pic85x85.png');
  2177. }
  2178. return $result;
  2179. }
  2180. /**
  2181. * @deprecated See CourseManager::course_code_exists()
  2182. */
  2183. public static function is_existing_course_code($wanted_course_code) {
  2184. return self::course_code_exists($wanted_course_code);
  2185. }
  2186. /**
  2187. * Display special courses (and only these) as several HTML divs of class userportal-course-item
  2188. *
  2189. * Special courses are courses that stick on top of the list and are "auto-registerable"
  2190. * in the sense that any user clicking them is registered as a student
  2191. * @param int User id
  2192. * @return void
  2193. */
  2194. function display_special_courses ($user_id) {
  2195. $user_id = intval($user_id);
  2196. $user_info = api_get_user_info($user_id);
  2197. $special_course_list = array();
  2198. $tbl_course = Database::get_main_table(TABLE_MAIN_COURSE);
  2199. $tbl_course_user = Database::get_main_table(TABLE_MAIN_COURSE_USER);
  2200. $tbl_course_field = Database::get_main_table(TABLE_MAIN_COURSE_FIELD);
  2201. $tbl_course_field_value = Database::get_main_table(TABLE_MAIN_COURSE_FIELD_VALUES);
  2202. $tbl_user_course_category = Database::get_user_personal_table(TABLE_USER_COURSE_CATEGORY);
  2203. // get course list auto-register
  2204. $sql = "SELECT course_code FROM $tbl_course_field_value tcfv INNER JOIN $tbl_course_field tcf ON " .
  2205. " tcfv.field_id = tcf.id WHERE tcf.field_variable = 'special_course' AND tcfv.field_value = 1 ";
  2206. $special_course_result = Database::query($sql);
  2207. if (Database::num_rows($special_course_result) > 0) {
  2208. $special_course_list = array();
  2209. while ($result_row = Database::fetch_array($special_course_result)) {
  2210. $special_course_list[] = '"'.$result_row['course_code'].'"';
  2211. }
  2212. }
  2213. $with_special_courses = $without_special_courses = '';
  2214. if (!empty($special_course_list)) {
  2215. $with_special_courses = ' course.code IN ('.implode(',',$special_course_list).')';
  2216. }
  2217. if (!empty($with_special_courses)) {
  2218. $sql = "SELECT course.code, course.visual_code, course.subscribe subscr, course.unsubscribe unsubscr,
  2219. course.title title, course.tutor_name tutor, course.db_name, course.directory, course_rel_user.status status,
  2220. course_rel_user.sort sort, course_rel_user.user_course_cat user_course_cat, course_rel_user.user_id, course.visibility
  2221. FROM $TABLECOURS course
  2222. LEFT JOIN $TABLECOURSUSER course_rel_user ON course.code = course_rel_user.course_code AND course_rel_user.user_id = '$user_id'
  2223. WHERE $with_special_courses group by course.code";
  2224. $rs_special_course = Database::query($sql);
  2225. $number_of_courses = Database::num_rows($rs_special_course);
  2226. $key = 0;
  2227. $status_icon = '';
  2228. if ($number_of_courses > 0) {
  2229. while ($course = Database::fetch_array($rs_special_course)) {
  2230. // Get notifications.
  2231. $my_course = array();
  2232. $my_course['db'] = $course['db_name'];
  2233. $my_course['k'] = $course['code'];
  2234. $my_course['id_session'] = null;
  2235. $my_course['s'] = $course['status'];
  2236. $show_notification = Display::show_notification($my_course);
  2237. if (empty($course['user_id'])) {
  2238. $course['status'] = $user_info['status'];
  2239. }
  2240. $status_icon = Display::return_icon('blackboard.png', get_lang('Course'), array('width'=>'48px'));
  2241. /*
  2242. if ($course['status'] == 1) {
  2243. $status_icon = Display::return_icon('course.gif', get_lang('Course')).' '.Display::return_icon('teachers.gif', get_lang('Status').': '.get_lang('Teacher'), array('style' => 'width: 11px; height: 11px;'));
  2244. }
  2245. if (($course['status'] == 5 && !api_is_coach()) || empty($course['status'])) {
  2246. $status_icon = Display::return_icon('course.gif', get_lang('Course')).' '.Display::return_icon('students.gif', get_lang('Status').': '.get_lang('Student'), array('style' => 'width: 11px; height: 11px;'));
  2247. }*/
  2248. echo '<div class="userportal-course-item">';
  2249. if (api_is_platform_admin()) {
  2250. echo '<div style="float: right;"><a href="'.api_get_path(WEB_CODE_PATH).'course_info/infocours.php?cidReq='.$course['code'].'">'.Display::return_icon('edit.gif', get_lang('Edit'), array('align' => 'absmiddle')).'</a>';
  2251. if ($course['status'] == COURSEMANAGER) {
  2252. //echo Display::return_icon('teachers.gif', get_lang('Status').': '.get_lang('Teacher'),array('style'=>'width:11px; height:11px;'));
  2253. }
  2254. echo '</div>';
  2255. }
  2256. $course_visibility = $course['visibility'];
  2257. if ($course_visibility != COURSE_VISIBILITY_CLOSED || $course['status'] == COURSEMANAGER) {
  2258. $course_title = '<a href="'.api_get_path(WEB_COURSE_PATH).$course['directory'].'/?id_session=0&amp;autoreg=1">'.$course['title'].'</a>';
  2259. } else {
  2260. $course_title = $course['title']." ".Display::tag('span',get_lang('CourseClosed'), array('class'=>'item_closed'));
  2261. }
  2262. echo '<div style="float: left; margin-right: 10px;">'.$status_icon.'</div><span class="userportal-course-item-title">'.$course_title.'</span><br />';
  2263. if (api_get_setting('display_coursecode_in_courselist') == 'true') {
  2264. echo $course['visual_code'];
  2265. }
  2266. if (api_get_setting('display_coursecode_in_courselist') == 'true' && api_get_setting('display_teacher_in_courselist') == 'true') {
  2267. echo ' - ';
  2268. }
  2269. if (api_get_setting('display_teacher_in_courselist') == 'true') {
  2270. echo $course['tutor'];
  2271. }
  2272. echo '&nbsp;';
  2273. echo Display::return_icon('klipper.png', get_lang('CourseAutoRegister'));
  2274. // Show notifications.
  2275. echo $show_notification;
  2276. echo '</div>';
  2277. $key++;
  2278. }
  2279. }
  2280. }
  2281. }
  2282. /**
  2283. * Display courses (without special courses) as several HTML divs
  2284. * of course categories, as class userportal-catalog-item.
  2285. * @uses display_courses_in_category() to display the courses themselves
  2286. * @param int user id
  2287. * @return void
  2288. */
  2289. function display_courses($user_id) {
  2290. global $_user, $_configuration;
  2291. // Building an array that contains all the id's of the user defined course categories.
  2292. // Initially this was inside the display_courses_in_category function but when we do it here we have fewer
  2293. // sql executions = performance increase.
  2294. $all_user_categories = self :: get_user_course_categories();
  2295. // Step 0: We display the course without a user category.
  2296. self :: display_courses_in_category(0, 'true');
  2297. // Step 1: We get all the categories of the user.
  2298. $tucc = Database::get_user_personal_table(TABLE_USER_COURSE_CATEGORY);
  2299. $sql = "SELECT id, title FROM $tucc WHERE user_id='".$_user['user_id']."' ORDER BY sort ASC";
  2300. $result = Database::query($sql);
  2301. while ($row = Database::fetch_array($result)) {
  2302. // We simply display the title of the category.
  2303. echo '<div class="userportal-catalog-item">';
  2304. echo '<ul class="catalog_box">';
  2305. echo '<li>';
  2306. echo Display::return_icon('folder_yellow.png', get_lang('Category'), array('width' => '48px', 'align' => 'absmiddle'));
  2307. echo '<span>';
  2308. echo '<a name="category'.$row['id'].'"></a>'; // Display an internal anchor.
  2309. echo $row['title'];
  2310. echo '</span>';
  2311. echo '</li>';
  2312. self :: display_courses_in_category($row['id']);
  2313. echo '</ul>';
  2314. echo '</div>';
  2315. }
  2316. }
  2317. /**
  2318. * Display courses inside a category (without special courses) as HTML dics of
  2319. * class userportal-course-item.
  2320. * @param int User category id
  2321. * @return void
  2322. */
  2323. function display_courses_in_category($user_category_id) {
  2324. global $_user, $_configuration;
  2325. // Table definitions
  2326. $TABLECOURS = Database :: get_main_table(TABLE_MAIN_COURSE);
  2327. $TABLECOURSUSER = Database :: get_main_table(TABLE_MAIN_COURSE_USER);
  2328. $TABLE_COURSE_FIELD = Database :: get_main_table(TABLE_MAIN_COURSE_FIELD);
  2329. $TABLE_COURSE_FIELD_VALUE = Database :: get_main_table(TABLE_MAIN_COURSE_FIELD_VALUES);
  2330. $TABLE_ACCESS_URL_REL_COURSE = Database :: get_main_table(TABLE_MAIN_ACCESS_URL_REL_COURSE);
  2331. $TABLE_USER_COURSE_CATEGORY = Database :: get_user_personal_table(TABLE_USER_COURSE_CATEGORY);
  2332. $current_url_id = api_get_current_access_url_id();
  2333. // Get course list auto-register
  2334. $sql = "SELECT course_code FROM $TABLE_COURSE_FIELD_VALUE tcfv INNER JOIN $TABLE_COURSE_FIELD tcf ON " .
  2335. " tcfv.field_id = tcf.id WHERE tcf.field_variable = 'special_course' AND tcfv.field_value = 1 ";
  2336. $special_course_result = Database::query($sql);
  2337. if (Database::num_rows($special_course_result) > 0) {
  2338. $special_course_list = array();
  2339. while ($result_row = Database::fetch_array($special_course_result)) {
  2340. $special_course_list[] = '"'.$result_row['course_code'].'"';
  2341. }
  2342. }
  2343. $without_special_courses = '';
  2344. if (!empty($special_course_list)) {
  2345. $without_special_courses = ' AND course.code NOT IN ('.implode(',',$special_course_list).')';
  2346. }
  2347. $sql_select_courses = "SELECT course.code, course.visual_code, course.subscribe subscr, course.unsubscribe unsubscr,
  2348. course.title title, course.tutor_name tutor, course.db_name, course.directory, course_rel_user.status status,
  2349. course_rel_user.sort sort, course_rel_user.user_course_cat user_course_cat, course.visibility
  2350. FROM $TABLECOURS course,
  2351. $TABLECOURSUSER course_rel_user, ".$TABLE_ACCESS_URL_REL_COURSE." url
  2352. WHERE course.code = course_rel_user.course_code AND url.course_code = course.code
  2353. AND course_rel_user.user_id = '".$_user['user_id']."'
  2354. AND course_rel_user.relation_type<>".COURSE_RELATION_TYPE_RRHH."
  2355. AND course_rel_user.user_course_cat='".$user_category_id."' $without_special_courses ";
  2356. // If multiple URL access mode is enabled, only fetch courses
  2357. // corresponding to the current URL.
  2358. if ($_configuration['multiple_access_urls'] && $current_url_id != -1){
  2359. $sql_select_courses .= " AND url.course_code=course.code AND access_url_id='".$current_url_id."'";
  2360. }
  2361. // Use user's classification for courses (if any).
  2362. $sql_select_courses .= " ORDER BY course_rel_user.user_course_cat, course_rel_user.sort ASC";
  2363. $result = Database::query($sql_select_courses);
  2364. $number_of_courses = Database::num_rows($result);
  2365. $key = 0;
  2366. $status_icon = '';
  2367. // Browse through all courses.
  2368. while ($course = Database::fetch_array($result)) {
  2369. // Get notifications.
  2370. $my_course = array();
  2371. $my_course['db'] = $course['db_name'];
  2372. $my_course['k'] = $course['code'];
  2373. $my_course['id_session'] = null;
  2374. $my_course['s'] = $course['status'];
  2375. // For each course, get if there is any notification icon to show
  2376. // (something that would have changed since the user's last visit).
  2377. $show_notification = Display :: show_notification($my_course);
  2378. // New code displaying the user's status in respect to this course.
  2379. $status_icon = Display::return_icon('blackboard.png', get_lang('Course'), array('width' => '48px'));
  2380. echo '<div class="userportal-course-item">';
  2381. if (api_is_platform_admin()) {
  2382. echo '<div style="float:right;"><a href="'.api_get_path(WEB_CODE_PATH).'course_info/infocours.php?cidReq='.$course['code'].'">'.Display::return_icon('edit.gif', get_lang('Edit'), array('align' => 'absmiddle')).'</a>';
  2383. if ($course['status'] == COURSEMANAGER) {
  2384. //echo Display::return_icon('teachers.gif', get_lang('Status').': '.get_lang('Teacher'), array('style'=>'width: 11px; height: 11px;'));
  2385. }
  2386. echo '</div>';
  2387. }
  2388. // Function logic - act on the data (check if the course is virtual, if yes change the link).
  2389. $is_virtual_course = CourseManager :: is_virtual_course_from_system_code($course['code']);
  2390. if ($is_virtual_course) {
  2391. // If the current user is also subscribed in the real course to which this
  2392. // virtual course is linked, we don't need to display the virtual course entry in
  2393. // the course list - it is combined with the real course entry.
  2394. $target_course_code = CourseManager :: get_target_of_linked_course($course['code']);
  2395. $is_subscribed_in_target_course = CourseManager :: is_user_subscribed_in_course(api_get_user_id(), $target_course_code);
  2396. if ($is_subscribed_in_target_course) {
  2397. return; // Do not display this course entry.
  2398. }
  2399. }
  2400. // Check if the course has virtual courses attached. If yes change the course title and display code.
  2401. $has_virtual_courses = CourseManager :: has_virtual_courses_from_code($course['code'], api_get_user_id());
  2402. if ($has_virtual_courses) {
  2403. $course_info = api_get_course_info($course['code']);
  2404. $return_result = CourseManager :: determine_course_title_from_course_info(api_get_user_id(), $course_info);
  2405. $course_title = $return_result['title'];
  2406. $course_display_code = $return_result['code'];
  2407. } else {
  2408. $course_title = $course['title'];
  2409. $course_display_code = $course['visual_code'];
  2410. }
  2411. // Show a hyperlink to the course, unless the course is closed and user is not course admin.
  2412. $course_visibility = $course['visibility'];
  2413. if ($course_visibility != COURSE_VISIBILITY_CLOSED || $course['status'] == COURSEMANAGER) {
  2414. $course_title = '<a href="'.api_get_path(WEB_COURSE_PATH).$course['directory'].'/?id_session=0">'.$course['title'].'</a>';
  2415. } else {
  2416. $course_title = $course['title']." ".Display::tag('span',get_lang('CourseClosed'), array('class'=>'item_closed'));
  2417. }
  2418. // Start displaying the course block itself.
  2419. echo '<div style="float: left; margin-right: 10px;">'.$status_icon.'</div><span class="userportal-course-item-title">'.$course_title.'</span><br />';
  2420. if (api_get_setting('display_coursecode_in_courselist') == 'true') {
  2421. echo $course_display_code;
  2422. }
  2423. if (api_get_setting('display_coursecode_in_courselist') == 'true' && api_get_setting('display_teacher_in_courselist') == 'true') {
  2424. echo ' - ';
  2425. }
  2426. if (api_get_setting('display_teacher_in_courselist') == 'true') {
  2427. if (!empty($course['tutor']))
  2428. echo $course['tutor'];
  2429. }
  2430. // Show notifications.
  2431. echo $show_notification;
  2432. echo '</div>';
  2433. $key++;
  2434. }
  2435. }
  2436. /**
  2437. * Retrieves the user defined course categories
  2438. * @author Patrick Cool <patrick.cool@UGent.be>, Ghent University
  2439. * @return array containing all the titles of the user defined courses with the id as key of the array
  2440. */
  2441. function get_user_course_categories() {
  2442. global $_user;
  2443. $output = array();
  2444. $table_category = Database::get_user_personal_table(TABLE_USER_COURSE_CATEGORY);
  2445. $sql = "SELECT * FROM ".$table_category." WHERE user_id='".Database::escape_string($_user['user_id'])."'";
  2446. $result = Database::query($sql);
  2447. while ($row = Database::fetch_array($result)) {
  2448. $output[$row['id']] = $row['title'];
  2449. }
  2450. return $output;
  2451. }
  2452. /**
  2453. * Get the course id based on the original id and field name in the extra fields. Returns 0 if course was not found
  2454. *
  2455. * @param string Original course id
  2456. * @param string Original field name
  2457. * @return int Course id
  2458. */
  2459. public static function get_course_id_from_original_id($original_course_id_value, $original_course_id_name) {
  2460. $t_cfv = Database::get_main_table(TABLE_MAIN_COURSE_FIELD_VALUES);
  2461. $table_field = Database::get_main_table(TABLE_MAIN_COURSE_FIELD);
  2462. $sql_course = "SELECT id FROM $table_field cf INNER JOIN $t_cfv cfv ON cfv.field_id=cf.id WHERE field_variable='$original_course_id_name' AND field_value='$original_course_id_value'";
  2463. $res = Database::query($sql_course);
  2464. $row = Database::fetch_object($res);
  2465. if($row != false) {
  2466. return $row->id;
  2467. } else {
  2468. return 0;
  2469. }
  2470. }
  2471. /**
  2472. * Display code for one specific course a logged in user is subscribed to.
  2473. * Shows a link to the course, what's new icons...
  2474. *
  2475. * $my_course['d'] - course directory
  2476. * $my_course['i'] - course title
  2477. * $my_course['c'] - visual course code
  2478. * $my_course['k'] - system course code
  2479. * $my_course['db'] - course database
  2480. *
  2481. * @param array Course details
  2482. * @param integer Session ID
  2483. * @param string CSS class to apply to course entry
  2484. * @param boolean Whether the session is supposedly accessible now (not in the case it has passed and is in invisible/unaccessible mode)
  2485. * @return string The HTML to be printed for the course entry
  2486. *
  2487. * @version 1.0.3
  2488. * @todo refactor into different functions for database calls | logic | display
  2489. * @todo replace single-character $my_course['d'] indices
  2490. * @todo move code for what's new icons to a separate function to clear things up
  2491. * @todo add a parameter user_id so that it is possible to show the courselist of other users (=generalisation). This will prevent having to write a new function for this.
  2492. */
  2493. function get_logged_user_course_html($course, $session_id = 0, $class = 'courses', $session_accessible = true) {
  2494. global $nosession, $nbDigestEntries, $digest, $thisCourseSysCode, $orderKey;
  2495. $charset = api_get_system_encoding();
  2496. $current_uid = api_get_user_id();
  2497. $info = api_get_course_info($course['code']);
  2498. $status_course = CourseManager::get_user_in_course_status($current_uid, $course['code']);
  2499. if (!is_array($course['code'])) {
  2500. $my_course = api_get_course_info($course['code']);
  2501. $my_course['k'] = $my_course['id'];
  2502. $my_course['db'] = $my_course['dbName'];
  2503. $my_course['c'] = $my_course['official_code'];
  2504. $my_course['i'] = $my_course['name'];
  2505. $my_course['d'] = $my_course['path'];
  2506. $my_course['t'] = $my_course['titular'];
  2507. $my_course['id_session'] = $session_id;
  2508. $my_course['status'] = empty($session_id) ? $status_course : 5;
  2509. }
  2510. if (api_get_setting('use_session_mode') == 'true' && !$nosession) {
  2511. global $now, $date_start, $date_end;
  2512. }
  2513. // Initialise.
  2514. $result = '';
  2515. // Table definitions
  2516. //$statistic_database = Database::get_statistic_database();
  2517. $main_user_table = Database :: get_main_table(TABLE_MAIN_USER);
  2518. $tbl_session = Database :: get_main_table(TABLE_MAIN_SESSION);
  2519. $tbl_session_category = Database :: get_main_table(TABLE_MAIN_SESSION_CATEGORY);
  2520. $course_database = $my_course['db'];
  2521. $course_tool_table = Database :: get_course_table(TABLE_TOOL_LIST, $course_database);
  2522. $tool_edit_table = Database :: get_course_table(TABLE_ITEM_PROPERTY, $course_database);
  2523. $course_group_user_table = Database :: get_course_table(TOOL_USER, $course_database);
  2524. $user_id = api_get_user_id();
  2525. $course_system_code = $my_course['k'];
  2526. $course_visual_code = $my_course['c'];
  2527. $course_title = $my_course['i'];
  2528. $course_directory = $my_course['d'];
  2529. $course_teacher = $my_course['t'];
  2530. $course_teacher_email = isset($my_course['email']) ? $my_course['email'] : '';
  2531. $course_info = Database :: get_course_info($course_system_code);
  2532. $course_access_settings = CourseManager :: get_access_settings($course_system_code);
  2533. $course_id = isset($course_info['course_id']) ? $course_info['course_id'] : null;
  2534. $course_visibility = $course_access_settings['visibility'];
  2535. $user_in_course_status = CourseManager :: get_user_in_course_status(api_get_user_id(), $course_system_code);
  2536. // Function logic - act on the data.
  2537. $is_virtual_course = CourseManager :: is_virtual_course_from_system_code($my_course['k']);
  2538. if ($is_virtual_course) {
  2539. // If the current user is also subscribed in the real course to which this
  2540. // virtual course is linked, we don't need to display the virtual course entry in
  2541. // the course list - it is combined with the real course entry.
  2542. $target_course_code = CourseManager :: get_target_of_linked_course($course_system_code);
  2543. $is_subscribed_in_target_course = CourseManager :: is_user_subscribed_in_course(api_get_user_id(), $target_course_code);
  2544. if ($is_subscribed_in_target_course) {
  2545. return; //do not display this course entry
  2546. }
  2547. }
  2548. $has_virtual_courses = CourseManager :: has_virtual_courses_from_code($course_system_code, api_get_user_id());
  2549. if ($has_virtual_courses) {
  2550. $return_result = CourseManager :: determine_course_title_from_course_info(api_get_user_id(), $course_info);
  2551. $course_display_title = $return_result['title'];
  2552. $course_display_code = $return_result['code'];
  2553. } else {
  2554. $course_display_title = $course_title;
  2555. $course_display_code = $course_visual_code;
  2556. }
  2557. $s_course_status = $my_course['status'];
  2558. $is_coach = api_is_coach($my_course['id_session'],$course['code']);
  2559. $s_htlm_status_icon = '';
  2560. $s_htlm_status_icon = Display::return_icon('blackboard_blue.png', get_lang('Course'), array('width' => '48px'));
  2561. /*
  2562. if ($s_course_status == 1) {
  2563. $s_htlm_status_icon = Display::return_icon('course.gif', get_lang('Course')).' '.Display::return_icon('teachers.gif', get_lang('Status').': '.get_lang('Teacher'), array('style' => 'width: 11px; height: 11px;'));
  2564. }
  2565. if ($s_course_status == 2 || ($is_coach && $s_course_status != 1)) {
  2566. $s_htlm_status_icon = Display::return_icon('course.gif', get_lang('Course')).' '.Display::return_icon('coachs.gif', get_lang('Status').': '.get_lang('GeneralCoach'), array('style' => 'width: 11px; height: 11px;'));
  2567. }
  2568. if (($s_course_status == 5 && !$is_coach) || empty($s_course_status)) {
  2569. $s_htlm_status_icon = Display::return_icon('course.gif', get_lang('Course')).' '.Display::return_icon('students.gif', get_lang('Status').': '.get_lang('Student'), array('style' => 'width: 11px; height: 11px;'));
  2570. }
  2571. */
  2572. // Display course entry.
  2573. $result .= '<li class="'.$class.'"><div class="coursestatusicons">'.$s_htlm_status_icon.'</div>';
  2574. // Show a hyperlink to the course, unless the course is closed and user is not course admin.
  2575. if ($session_accessible) {
  2576. if ($course_visibility != COURSE_VISIBILITY_CLOSED || $user_in_course_status == COURSEMANAGER) {
  2577. if (api_get_setting('use_session_mode') == 'true' && !$nosession) {
  2578. if (empty($my_course['id_session'])) {
  2579. $my_course['id_session'] = 0;
  2580. }
  2581. if ($user_in_course_status == COURSEMANAGER || ($date_start <= $now && $date_end >= $now) || $date_start == '0000-00-00') {
  2582. $result .= '<a href="'.api_get_path(WEB_COURSE_PATH).$course_directory.'/?id_session='.$my_course['id_session'].'">'.$course_display_title.'</a>';
  2583. }
  2584. } else {
  2585. $result .= '<a href="'.api_get_path(WEB_COURSE_PATH).$course_directory.'/">'.$course_display_title.'</a>';
  2586. }
  2587. } else {
  2588. $result .= $course_display_title.' '.Display::tag('span',get_lang('CourseClosed'), array('class'=>'item_closed'));
  2589. }
  2590. } else {
  2591. $result .= $course_display_title;
  2592. }
  2593. // Show the course_code and teacher if chosen to display this.
  2594. if (api_get_setting('display_coursecode_in_courselist') == 'true' || api_get_setting('display_teacher_in_courselist') == 'true') {
  2595. $result .= '<br />';
  2596. }
  2597. if (api_get_setting('display_coursecode_in_courselist') == 'true') {
  2598. $result .= $course_display_code;
  2599. }
  2600. if (api_get_setting('display_teacher_in_courselist') == 'true') {
  2601. if (api_get_setting('use_session_mode')=='true' && !$nosession) {
  2602. $coachs_course = api_get_coachs_from_course($my_course['id_session'], $course['code']);
  2603. $course_coachs = array();
  2604. if (is_array($coachs_course)) {
  2605. foreach ($coachs_course as $coach_course) {
  2606. $course_coachs[] = api_get_person_name($coach_course['firstname'], $coach_course['lastname']);
  2607. }
  2608. }
  2609. if ($s_course_status == 1 || ($s_course_status == 5 && empty($my_course['id_session'])) || empty($s_course_status)) {
  2610. $result .= $course_teacher;
  2611. }
  2612. if (($s_course_status == 5 && !empty($my_course['id_session'])) || ($is_coach && $s_course_status != 1)) {
  2613. if (is_array($course_coachs) && count($course_coachs)> 0 ) {
  2614. if (api_get_setting('display_coursecode_in_courselist') == 'true' && api_get_setting('display_teacher_in_courselist') == 'true') {
  2615. $result .= ' &ndash; ';
  2616. }
  2617. $result .= get_lang('Coachs').': '.implode(', ',$course_coachs);
  2618. }
  2619. }
  2620. } else {
  2621. $result .= $course_teacher;
  2622. }
  2623. if(!empty($course_teacher_email)) {
  2624. $result .= ' ('.$course_teacher_email.')';
  2625. }
  2626. }
  2627. $result .= isset($course['special_course']) ? ' '.Display::return_icon('klipper.png', get_lang('CourseAutoRegister')) : '';
  2628. $current_course_settings = CourseManager :: get_access_settings($my_course['k']);
  2629. // Display the "what's new" icons.
  2630. $result .= Display :: show_notification($my_course);
  2631. if ((CONFVAL_showExtractInfo == SCRIPTVAL_InCourseList || CONFVAL_showExtractInfo == SCRIPTVAL_Both) && $nbDigestEntries > 0) {
  2632. reset($digest);
  2633. $result .= '
  2634. <ul>';
  2635. while (list($key2) = each($digest[$thisCourseSysCode])) {
  2636. $result .= '<li>';
  2637. if ($orderKey[1] == 'keyTools') {
  2638. $result .= "<a href=\"$toolsList[$key2] [\"path\"] $thisCourseSysCode \">";
  2639. $result .= "$toolsList[$key2][\"name\"]</a>";
  2640. } else {
  2641. $result .= api_convert_and_format_date($key2, DATE_FORMAT_LONG, date_default_timezone_get());
  2642. }
  2643. $result .= '</li>';
  2644. $result .= '<ul>';
  2645. reset ($digest[$thisCourseSysCode][$key2]);
  2646. while (list ($key3, $dataFromCourse) = each($digest[$thisCourseSysCode][$key2])) {
  2647. $result .= '<li>';
  2648. if ($orderKey[2] == 'keyTools') {
  2649. $result .= "<a href=\"$toolsList[$key3] [\"path\"] $thisCourseSysCode \">";
  2650. $result .= "$toolsList[$key3][\"name\"]</a>";
  2651. } else {
  2652. $result .= api_convert_and_format_date($key3, DATE_FORMAT_LONG, date_default_timezone_get());
  2653. }
  2654. $result .= '<ul compact="compact">';
  2655. reset($digest[$thisCourseSysCode][$key2][$key3]);
  2656. while (list ($key4, $dataFromCourse) = each($digest[$thisCourseSysCode][$key2][$key3])) {
  2657. $result .= '<li>';
  2658. $result .= @htmlspecialchars(api_substr(strip_tags($dataFromCourse), 0, CONFVAL_NB_CHAR_FROM_CONTENT), ENT_QUOTES, $charset);
  2659. $result .= '</li>';
  2660. }
  2661. $result .= '</ul>';
  2662. $result .= '</li>';
  2663. }
  2664. $result .= '</ul>';
  2665. $result .= '</li>';
  2666. }
  2667. $result .= '</ul>';
  2668. }
  2669. $result .= '</li>';
  2670. if (api_get_setting('use_session_mode') == 'true' && !$nosession) {
  2671. $session = '';
  2672. $active = false;
  2673. if (!empty($my_course['session_name'])) {
  2674. // Request for the name of the general coach
  2675. $sql = 'SELECT lastname, firstname,sc.name
  2676. FROM '.$tbl_session.' ts
  2677. LEFT JOIN '.$main_user_table .' tu
  2678. ON ts.id_coach = tu.user_id
  2679. INNER JOIN '.$tbl_session_category.' sc ON ts.session_category_id = sc.id
  2680. WHERE ts.id='.(int) $my_course['id_session']. ' LIMIT 1';
  2681. $rs = Database::query($sql);
  2682. $sessioncoach = Database::store_result($rs);
  2683. $sessioncoach = $sessioncoach[0];
  2684. $session = array();
  2685. $session['title'] = $my_course['session_name'];
  2686. $session_category_id = CourseManager::get_session_category_id_by_session_id($my_course['id_session']);
  2687. $session['category'] = $sessioncoach['name'];
  2688. if ($my_course['date_start'] == '0000-00-00') {
  2689. $session['dates'] = get_lang('WithoutTimeLimits');
  2690. if (api_get_setting('show_session_coach') === 'true') {
  2691. $session['coach'] = get_lang('GeneralCoach').': '.api_get_person_name($sessioncoach['firstname'], $sessioncoach['lastname']);
  2692. }
  2693. $active = true;
  2694. } else {
  2695. $session ['dates'] = ' - '.get_lang('From').' '.$my_course['date_start'].' '.get_lang('To').' '.$my_course['date_end'];
  2696. if (api_get_setting('show_session_coach') === 'true') {
  2697. $session['coach'] = get_lang('GeneralCoach').': '.api_get_person_name($sessioncoach['firstname'], $sessioncoach['lastname']);
  2698. }
  2699. $active = ($date_start <= $now && $date_end >= $now);
  2700. }
  2701. }
  2702. $output = array ($my_course['user_course_cat'], $result, $my_course['id_session'], $session, 'active' => $active, 'session_category_id' => $session_category_id);
  2703. } else {
  2704. $output = array ($my_course['user_course_cat'], $result);
  2705. }
  2706. return $output;
  2707. }
  2708. /**
  2709. *
  2710. * @param string source course code
  2711. * @param int source session id
  2712. * @param string destination course code
  2713. * @param int destination session id
  2714. * @return bool
  2715. */
  2716. function copy_course($source_course_code, $source_session_id, $destination_course_code, $destination_session_id) {
  2717. require_once api_get_path(SYS_CODE_PATH).'coursecopy/classes/CourseBuilder.class.php';
  2718. require_once api_get_path(SYS_CODE_PATH).'coursecopy/classes/CourseRestorer.class.php';
  2719. require_once api_get_path(SYS_CODE_PATH).'coursecopy/classes/CourseSelectForm.class.php';
  2720. $course_info = api_get_course_info($source_course_code);
  2721. if (!empty($course_info)) {
  2722. $cb = new CourseBuilder('', $course_info);
  2723. $course = $cb->build($source_session_id,$source_session_id['code']);
  2724. $course_restorer = new CourseRestorer($course);
  2725. $course_restorer->restore($destination_course_code, $destination_session_id, true);
  2726. return true;
  2727. }
  2728. return false;
  2729. }
  2730. /**
  2731. * A simpler version of the copy_course, the function creates an empty course
  2732. *
  2733. * @param string course title
  2734. * @param string source course code
  2735. * @param int source session id
  2736. * @return
  2737. */
  2738. function copy_course_simple($new_title, $source_course_code, $source_session_id = 0) {
  2739. $source_course_info = api_get_course_info($source_course_code);
  2740. if (!empty($source_course_info)) {
  2741. $new_course_code = self::generate_nice_next_course_code($source_course_code);
  2742. if ($new_course_code) {
  2743. $new_course_info = self::create_course($new_title, $new_course_code, false);
  2744. if (!empty($new_course_info['code'])) {
  2745. $result = self::copy_course($source_course_code, $source_session_id, $new_course_info['code'], 0);
  2746. if ($result) {
  2747. return $new_course_info;
  2748. }
  2749. }
  2750. }
  2751. }
  2752. return false;
  2753. }
  2754. /**
  2755. * Creates a new course code based in given code
  2756. *
  2757. * @param string wanted code
  2758. * @example $wanted_code = 'curse' if there are in the DB codes like curse1 curse2 the function will return: course3
  2759. * if the course code doest not exist in the DB the same course code will be returned
  2760. * @return string wanted unused code
  2761. */
  2762. function generate_nice_next_course_code($wanted_code) {
  2763. require_once api_get_path(LIBRARY_PATH).'add_course.lib.inc.php';
  2764. $course_code_ok = !self::course_code_exists($wanted_code);
  2765. if (!$course_code_ok) {
  2766. $wanted_code = generate_course_code($wanted_code);
  2767. $table = Database::get_main_table(TABLE_MAIN_COURSE);
  2768. $wanted_code = Database::escape_string($wanted_code);
  2769. $sql = "SELECT count(*) as count FROM $table WHERE code LIKE '$wanted_code%'";
  2770. $result = Database::query($sql);
  2771. if (Database::num_rows($result) > 0 ) {
  2772. $row = Database::fetch_array($result);
  2773. $count = $row['count'] + 1;
  2774. $wanted_code = $wanted_code.'_'.$count;
  2775. $result = api_get_course_info($wanted_code);
  2776. if (empty($result)) {
  2777. return $wanted_code;
  2778. }
  2779. }
  2780. return false;
  2781. }
  2782. return $wanted_code;
  2783. }
  2784. /**
  2785. * Creates a course very fast (the function doesn't need a lot of parameters)
  2786. *
  2787. * @param string course title
  2788. * @param bool add example content or not
  2789. * @param mixed false if the course was not created, array with the course info
  2790. *
  2791. Coded found in create_course/add_course.php
  2792. */
  2793. function create_course($title, $wanted_code = '', $exemplary_content = false) {
  2794. require_once api_get_path(LIBRARY_PATH).'add_course.lib.inc.php';
  2795. global $_configuration, $firstExpirationDelay;
  2796. if (empty($title)) {
  2797. return false;
  2798. }
  2799. if (empty($wanted_code)) {
  2800. $wanted_code = $title;
  2801. // Check whether the requested course code has already been occupied.
  2802. $dbnamelength = strlen($_configuration['db_prefix']);
  2803. // Ensure the database prefix + database name do not get over 40 characters.
  2804. $maxlength = 40 - $dbnamelength;
  2805. $wanted_code = generate_course_code(api_substr($title, 0, $maxlength));
  2806. }
  2807. // Create the course immediately
  2808. $keys = define_course_keys($wanted_code, '', $_configuration['db_prefix']);
  2809. if (count($keys)) {
  2810. $visual_code = $keys['currentCourseCode'];
  2811. $code = $keys['currentCourseId'];
  2812. $db_name = $keys['currentCourseDbName'];
  2813. $directory = $keys['currentCourseRepository'];
  2814. $code_info = api_get_course_info($code);
  2815. if (empty($code_info)) {
  2816. $expiration_date = time() + $firstExpirationDelay;
  2817. prepare_course_repository($directory, $code);
  2818. update_Db_course($db_name);
  2819. $pictures_array = fill_course_repository($directory, $exemplary_content);
  2820. fill_Db_course($db_name, $directory, $course_language, $pictures_array, $exemplary_content);
  2821. $course_language = api_get_setting('platformLanguage');
  2822. $result = register_course($code, $visual_code, $directory, $db_name, '', '', $title, $course_language, api_get_user_id(), $expiration_date);
  2823. $course_info = api_get_course_info($code);
  2824. if (!empty($course_info)) {
  2825. return $course_info;
  2826. }
  2827. }
  2828. }
  2829. return false;
  2830. }
  2831. } //end class CourseManager