1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374757677787980818283848586878889909192939495969798991001011021031041051061071081091101111121131141151161171181191201211221231241251261271281291301311321331341351361371381391401411421431441451461471481491501511521531541551561571581591601611621631641651661671681691701711721731741751761771781791801811821831841851861871881891901911921931941951961971981992002012022032042052062072082092102112122132142152162172182192202212222232242252262272282292302312322332342352362372382392402412422432442452462472482492502512522532542552562572582592602612622632642652662672682692702712722732742752762772782792802812822832842852862872882892902912922932942952962972982993003013023033043053063073083093103113123133143153163173183193203213223233243253263273283293303313323333343353363373383393403413423433443453463473483493503513523533543553563573583593603613623633643653663673683693703713723733743753763773783793803813823833843853863873883893903913923933943953963973983994004014024034044054064074084094104114124134144154164174184194204214224234244254264274284294304314324334344354364374384394404414424434444454464474484494504514524534544554564574584594604614624634644654664674684694704714724734744754764774784794804814824834844854864874884894904914924934944954964974984995005015025035045055065075085095105115125135145155165175185195205215225235245255265275285295305315325335345355365375385395405415425435445455465475485495505515525535545555565575585595605615625635645655665675685695705715725735745755765775785795805815825835845855865875885895905915925935945955965975985996006016026036046056066076086096106116126136146156166176186196206216226236246256266276286296306316326336346356366376386396406416426436446456466476486496506516526536546556566576586596606616626636646656666676686696706716726736746756766776786796806816826836846856866876886896906916926936946956966976986997007017027037047057067077087097107117127137147157167177187197207217227237247257267277287297307317327337347357367377387397407417427437447457467477487497507517527537547557567577587597607617627637647657667677687697707717727737747757767777787797807817827837847857867877887897907917927937947957967977987998008018028038048058068078088098108118128138148158168178188198208218228238248258268278288298308318328338348358368378388398408418428438448458468478488498508518528538548558568578588598608618628638648658668678688698708718728738748758768778788798808818828838848858868878888898908918928938948958968978988999009019029039049059069079089099109119129139149159169179189199209219229239249259269279289299309319329339349359369379389399409419429439449459469479489499509519529539549559569579589599609619629639649659669679689699709719729739749759769779789799809819829839849859869879889899909919929939949959969979989991000100110021003100410051006100710081009101010111012101310141015101610171018101910201021102210231024102510261027102810291030103110321033103410351036103710381039104010411042104310441045104610471048104910501051105210531054105510561057105810591060106110621063106410651066106710681069107010711072107310741075107610771078107910801081108210831084108510861087108810891090109110921093109410951096109710981099110011011102110311041105110611071108110911101111111211131114111511161117111811191120112111221123112411251126112711281129113011311132113311341135113611371138113911401141114211431144114511461147114811491150115111521153115411551156115711581159116011611162116311641165116611671168116911701171117211731174117511761177117811791180118111821183118411851186118711881189119011911192119311941195119611971198119912001201120212031204120512061207120812091210121112121213121412151216121712181219122012211222122312241225122612271228122912301231123212331234123512361237123812391240124112421243124412451246124712481249125012511252125312541255125612571258125912601261126212631264126512661267126812691270127112721273127412751276127712781279128012811282128312841285128612871288128912901291129212931294129512961297129812991300130113021303130413051306130713081309131013111312131313141315 |
- <?php
- /* For licensing terms, see /license.txt */
- /**
- * This is the main database library for Chamilo.
- * Include/require it in your code to use its functionality.
- * Because this library contains all the basic database calls, it could be
- * replaced by another library for say, PostgreSQL, to actually use Chamilo
- * with another database (this is not ready yet because a lot of code still
- * uses the MySQL database functions extensively).
- *
- * @package chamilo.library
- * @todo the table constants have all to start with TABLE_
- * This is because of the analogy with the tool constants TOOL_
- */
- /* CONSTANTS */
- // Main database tables
- define('TABLE_MAIN_COURSE', 'course');
- define('TABLE_MAIN_USER', 'user');
- define('TABLE_MAIN_CLASS', 'class');
- define('TABLE_MAIN_ADMIN', 'admin');
- define('TABLE_MAIN_COURSE_CLASS', 'course_rel_class');
- define('TABLE_MAIN_COURSE_USER', 'course_rel_user');
- define('TABLE_MAIN_CLASS_USER', 'class_user');
- define('TABLE_MAIN_CATEGORY', 'course_category');
- define('TABLE_MAIN_COURSE_MODULE', 'course_module');
- define('TABLE_MAIN_SYSTEM_ANNOUNCEMENTS', 'sys_announcement');
- define('TABLE_MAIN_LANGUAGE', 'language');
- define('TABLE_MAIN_SETTINGS_OPTIONS', 'settings_options');
- define('TABLE_MAIN_SETTINGS_CURRENT', 'settings_current');
- define('TABLE_MAIN_SESSION', 'session');
- define('TABLE_MAIN_SESSION_CATEGORY', 'session_category');
- define('TABLE_MAIN_SESSION_COURSE', 'session_rel_course');
- define('TABLE_MAIN_SESSION_USER', 'session_rel_user');
- define('TABLE_MAIN_SESSION_CLASS', 'session_rel_class');
- define('TABLE_MAIN_SESSION_COURSE_USER', 'session_rel_course_rel_user');
- define('TABLE_MAIN_SHARED_SURVEY', 'shared_survey');
- define('TABLE_MAIN_SHARED_SURVEY_QUESTION', 'shared_survey_question');
- define('TABLE_MAIN_SHARED_SURVEY_QUESTION_OPTION', 'shared_survey_question_option');
- define('TABLE_MAIN_TEMPLATES', 'templates');
- define('TABLE_MAIN_SYSTEM_TEMPLATE', 'system_template');
- define('TABLE_MAIN_OPENID_ASSOCIATION', 'openid_association');
- // Gradebook
- define('TABLE_MAIN_GRADEBOOK_CATEGORY', 'gradebook_category');
- define('TABLE_MAIN_GRADEBOOK_EVALUATION', 'gradebook_evaluation');
- define('TABLE_MAIN_GRADEBOOK_LINKEVAL_LOG', 'gradebook_linkeval_log');
- define('TABLE_MAIN_GRADEBOOK_RESULT', 'gradebook_result');
- define('TABLE_MAIN_GRADEBOOK_RESULT_LOG', 'gradebook_result_log');
- define('TABLE_MAIN_GRADEBOOK_LINK', 'gradebook_link');
- define('TABLE_MAIN_GRADEBOOK_SCORE_DISPLAY','gradebook_score_display');
- define('TABLE_MAIN_GRADEBOOK_CERTIFICATE', 'gradebook_certificate');
- //Profiling
- define('TABLE_MAIN_USER_FIELD', 'user_field');
- define('TABLE_MAIN_USER_FIELD_OPTIONS', 'user_field_options');
- define('TABLE_MAIN_USER_FIELD_VALUES', 'user_field_values');
- //User tags
- define('TABLE_MAIN_TAG', 'tag');
- define('TABLE_MAIN_USER_REL_TAG', 'user_rel_tag');
- //User groups
- define('TABLE_MAIN_GROUP', 'groups');
- define('TABLE_MAIN_USER_REL_GROUP', 'group_rel_user');
- define('TABLE_MAIN_GROUP_REL_TAG', 'group_rel_tag');
- // Search engine
- define('TABLE_MAIN_SPECIFIC_FIELD', 'specific_field');
- define('TABLE_MAIN_SPECIFIC_FIELD_VALUES', 'specific_field_values');
- define('TABLE_MAIN_SEARCH_ENGINE_REF', 'search_engine_ref');
- // Access URLs
- define('TABLE_MAIN_ACCESS_URL', 'access_url');
- define('TABLE_MAIN_ACCESS_URL_REL_USER', 'access_url_rel_user');
- define('TABLE_MAIN_ACCESS_URL_REL_COURSE', 'access_url_rel_course');
- define('TABLE_MAIN_ACCESS_URL_REL_SESSION', 'access_url_rel_session');
- // Global calendar
- define('TABLE_MAIN_SYSTEM_CALENDAR', 'sys_calendar');
- // Reservation System
- define('TABLE_MAIN_RESERVATION_ITEM', 'reservation_item');
- define('TABLE_MAIN_RESERVATION_RESERVATION', 'reservation_main');
- define('TABLE_MAIN_RESERVATION_SUBSCRIBTION', 'reservation_subscription');
- define('TABLE_MAIN_RESERVATION_CATEGORY', 'reservation_category');
- define('TABLE_MAIN_RESERVATION_ITEM_RIGHTS', 'reservation_item_rights');
- // Social networking
- define('TABLE_MAIN_USER_REL_USER', 'user_rel_user');
- define('TABLE_MAIN_USER_FRIEND_RELATION_TYPE', 'user_friend_relation_type');
- // Web services
- define('TABLE_MAIN_USER_API_KEY', 'user_api_key');
- define('TABLE_MAIN_COURSE_FIELD', 'course_field');
- define('TABLE_MAIN_COURSE_FIELD_VALUES', 'course_field_values');
- define('TABLE_MAIN_SESSION_FIELD', 'session_field');
- define('TABLE_MAIN_SESSION_FIELD_VALUES', 'session_field_values');
- // Message
- define('TABLE_MAIN_MESSAGE', 'message');
- // Term and conditions
- define('TABLE_MAIN_LEGAL', 'legal');
- // Dashboard blocks plugin
- define('TABLE_MAIN_BLOCK', 'block');
- // Statistic database tables
- define('TABLE_STATISTIC_TRACK_E_LASTACCESS', 'track_e_lastaccess');
- define('TABLE_STATISTIC_TRACK_E_ACCESS', 'track_e_access');
- define('TABLE_STATISTIC_TRACK_E_LOGIN', 'track_e_login');
- define('TABLE_STATISTIC_TRACK_E_DOWNLOADS', 'track_e_downloads');
- define('TABLE_STATISTIC_TRACK_E_LINKS', 'track_e_links');
- define('TABLE_STATISTIC_TRACK_E_ONLINE', 'track_e_online');
- define('TABLE_STATISTIC_TRACK_E_HOTPOTATOES', 'track_e_hotpotatoes');
- define('TABLE_STATISTIC_TRACK_E_COURSE_ACCESS', 'track_e_course_access');
- define('TABLE_STATISTIC_TRACK_E_EXERCICES', 'track_e_exercices');
- define('TABLE_STATISTIC_TRACK_E_ATTEMPT', 'track_e_attempt');
- define('TABLE_STATISTIC_TRACK_E_ATTEMPT_RECORDING', 'track_e_attempt_recording');
- define('TABLE_STATISTIC_TRACK_E_DEFAULT', 'track_e_default');
- define('TABLE_STATISTIC_TRACK_E_UPLOADS', 'track_e_uploads');
- define('TABLE_STATISTIC_TRACK_E_HOTSPOT', 'track_e_hotspot');
- define('TABLE_STATISTIC_TRACK_E_ITEM_PROPERTY', 'track_e_item_property');
- // SCORM database tables
- define('TABLE_SCORM_MAIN', 'scorm_main');
- define('TABLE_SCORM_SCO_DATA', 'scorm_sco_data');
- // Course tables
- define('TABLE_AGENDA', 'calendar_event');
- define('TABLE_AGENDA_REPEAT', 'calendar_event_repeat');
- define('TABLE_AGENDA_REPEAT_NOT', 'calendar_event_repeat_not');
- define('TABLE_AGENDA_ATTACHMENT', 'calendar_event_attachment');
- define('TABLE_ANNOUNCEMENT', 'announcement');
- define('TABLE_ANNOUNCEMENT_ATTACHMENT', 'announcement_attachment');
- define('TABLE_CHAT_CONNECTED', 'chat_connected'); // @todo: probably no longer in use !!!
- define('TABLE_COURSE_DESCRIPTION', 'course_description');
- define('TABLE_DOCUMENT', 'document');
- define('TABLE_ITEM_PROPERTY', 'item_property');
- define('TABLE_LINK', 'link');
- define('TABLE_LINK_CATEGORY', 'link_category');
- define('TABLE_TOOL_LIST', 'tool');
- define('TABLE_TOOL_INTRO', 'tool_intro');
- define('TABLE_SCORMDOC', 'scormdocument');
- define('TABLE_STUDENT_PUBLICATION', 'student_publication');
- define('TABLE_STUDENT_PUBLICATION_ASSIGNMENT', 'student_publication_assignment');
- define('CHAT_CONNECTED_TABLE', 'chat_connected');
- // Course forum tables
- define('TABLE_FORUM_CATEGORY', 'forum_category');
- define('TABLE_FORUM', 'forum_forum');
- define('TABLE_FORUM_THREAD', 'forum_thread');
- define('TABLE_FORUM_POST', 'forum_post');
- define('TABLE_FORUM_ATTACHMENT', 'forum_attachment');
- define('TABLE_FORUM_MAIL_QUEUE', 'forum_mailcue');
- define('TABLE_FORUM_THREAD_QUALIFY', 'forum_thread_qualify');
- define('TABLE_FORUM_THREAD_QUALIFY_LOG', 'forum_thread_qualify_log');
- define('TABLE_FORUM_NOTIFICATION', 'forum_notification');
- // Course group tables
- define('TABLE_GROUP', 'group_info');
- define('TABLE_GROUP_USER', 'group_rel_user');
- define('TABLE_GROUP_TUTOR', 'group_rel_tutor');
- define('TABLE_GROUP_CATEGORY', 'group_category');
- // Course dropbox tables
- define('TABLE_DROPBOX_CATEGORY','dropbox_category');
- define('TABLE_DROPBOX_FEEDBACK','dropbox_feedback');
- define('TABLE_DROPBOX_POST', 'dropbox_post');
- define('TABLE_DROPBOX_FILE', 'dropbox_file');
- define('TABLE_DROPBOX_PERSON', 'dropbox_person');
- // Course quiz (or test, or exercice) tables
- define('TABLE_QUIZ_QUESTION', 'quiz_question');
- define('TABLE_QUIZ_TEST', 'quiz');
- define('TABLE_QUIZ_ANSWER', 'quiz_answer');
- define('TABLE_QUIZ_TEST_QUESTION', 'quiz_rel_question');
- // Linked resource table
- define('TABLE_LINKED_RESOURCES', 'resource');
- // New SCORM tables
- define('TABLE_LP_MAIN', 'lp');
- define('TABLE_LP_ITEM', 'lp_item');
- define('TABLE_LP_VIEW', 'lp_view');
- define('TABLE_LP_ITEM_VIEW', 'lp_item_view');
- define('TABLE_LP_IV_INTERACTION', 'lp_iv_interaction'); // IV = Item View
- define('TABLE_LP_IV_OBJECTIVE', 'lp_iv_objective'); // IV = Item View
- // Smartblogs (Kevin Van Den Haute::kevin@develop-it.be)
- // Permission tables
- define('TABLE_PERMISSION_USER', 'permission_user');
- define('TABLE_PERMISSION_TASK', 'permission_task');
- define('TABLE_PERMISSION_GROUP', 'permission_group');
- // Role tables
- define('TABLE_ROLE', 'role');
- define('TABLE_ROLE_PERMISSION', 'role_permissions');
- define('TABLE_ROLE_USER', 'role_user');
- define('TABLE_ROLE_GROUP', 'role_group');
- // Blog tables
- define('TABLE_BLOGS', 'blog');
- define('TABLE_BLOGS_POSTS', 'blog_post');
- define('TABLE_BLOGS_COMMENTS', 'blog_comment');
- define('TABLE_BLOGS_REL_USER', 'blog_rel_user');
- define('TABLE_BLOGS_TASKS', 'blog_task');
- define('TABLE_BLOGS_TASKS_REL_USER', 'blog_task_rel_user');
- define('TABLE_BLOGS_RATING', 'blog_rating');
- define('TABLE_BLOGS_ATTACHMENT', 'blog_attachment');
- define('TABLE_BLOGS_TASKS_PERMISSIONS', 'permission_task');
- //end of Smartblogs
- // User information tables
- define('TABLE_USER_INFO', 'userinfo_def');
- define('TABLE_USER_INFO_CONTENT', 'userinfo_content');
- // Course settings table
- define('TABLE_COURSE_SETTING', 'course_setting');
- // Course online tables
- define('TABLE_ONLINE_LINK', 'online_link');
- define('TABLE_ONLINE_CONNECTED','online_connected');
- // User database
- define('TABLE_PERSONAL_AGENDA', 'personal_agenda');
- define('TABLE_PERSONAL_AGENDA_REPEAT', 'personal_agenda_repeat');
- define('TABLE_PERSONAL_AGENDA_REPEAT_NOT', 'personal_agenda_repeat_not');
- define('TABLE_USER_COURSE_CATEGORY', 'user_course_category');
- // Survey
- // @TODO: Are these MAIN tables or course tables?
- // @TODO: Probably these constants are obsolete.
- define('TABLE_MAIN_SURVEY', 'survey');
- define('TABLE_MAIN_SURVEYQUESTION', 'questions');
- // Survey
- define('TABLE_SURVEY', 'survey');
- define('TABLE_SURVEY_QUESTION', 'survey_question');
- define('TABLE_SURVEY_QUESTION_OPTION', 'survey_question_option');
- define('TABLE_SURVEY_INVITATION', 'survey_invitation');
- define('TABLE_SURVEY_ANSWER', 'survey_answer');
- define('TABLE_SURVEY_QUESTION_GROUP', 'survey_group');
- define('TABLE_SURVEY_REPORT', 'survey_report');
- // Wiki tables
- define('TABLE_WIKI', 'wiki');
- define('TABLE_WIKI_CONF', 'wiki_conf');
- define('TABLE_WIKI_DISCUSS', 'wiki_discuss');
- define('TABLE_WIKI_MAILCUE', 'wiki_mailcue');
- // Glossary
- define('TABLE_GLOSSARY', 'glossary');
- // Notebook
- define('TABLE_NOTEBOOK', 'notebook');
- // Message
- define('TABLE_MESSAGE', 'message');
- define('TABLE_MESSAGE_ATTACHMENT', 'message_attachment');
- // Metadata
- define('TABLE_METADATA', 'metadata');
- // Attendance Sheet
- define('TABLE_ATTENDANCE', 'attendance');
- define('TABLE_ATTENDANCE_CALENDAR', 'attendance_calendar');
- define('TABLE_ATTENDANCE_SHEET', 'attendance_sheet');
- define('TABLE_ATTENDANCE_RESULT', 'attendance_result');
- // Thematic
- define('TABLE_THEMATIC','thematic');
- define('TABLE_THEMATIC_PLAN', 'thematic_plan');
- define('TABLE_THEMATIC_ADVANCE','thematic_advance');
- /* DATABASE CLASS
- The class and its methods
- */
- class Database {
- /*
- Accessor methods
- Usually, you won't need these directly but instead
- rely on of the get_xxx_table methods.
- */
- /**
- * Returns the name of the main database.
- */
- public static function get_main_database() {
- global $_configuration;
- return $_configuration['main_database'];
- }
- /**
- * Returns the name of the statistics database.
- */
- public static function get_statistic_database() {
- global $_configuration;
- return $_configuration['statistics_database'];
- }
- /**
- * Returns the name of the SCORM database.
- * @deprecated
- */
- public static function get_scorm_database() {
- global $_configuration;
- return $_configuration['scorm_database'];
- }
- /**
- * Returns the name of the database where all the personal stuff of the user is stored
- */
- public static function get_user_personal_database() {
- global $_configuration;
- return $_configuration['user_personal_database'];
- }
- /**
- * Returns the name of the current course database.
- * @return mixed Glued database name of false if undefined
- */
- public static function get_current_course_database() {
- $course_info = api_get_course_info();
- if (empty($course_info['dbName'])) {
- return false;
- }
- return $course_info['dbName'];
- }
- /**
- * Returns the glued name of the current course database.
- * @return mixed Glued database name of false if undefined
- */
- public static function get_current_course_glued_database() {
- $course_info = api_get_course_info();
- if (empty($course_info['dbNameGlu'])) {
- return false;
- }
- return $course_info['dbNameGlu'];
- }
- /**
- * The glue is the string needed between database and table.
- * The trick is: in multiple databases, this is a period (with backticks).
- * In single database, this can be e.g. an underscore so we just fake
- * there are multiple databases and the code can be written independent
- * of the single / multiple database setting.
- */
- public static function get_database_glue() {
- global $_configuration;
- return $_configuration['db_glue'];
- }
- /**
- * Returns the database prefix.
- * All created COURSE databases are prefixed with this string.
- *
- * TIP: This can be convenient e.g. if you have multiple system installations
- * on the same physical server.
- */
- public static function get_database_name_prefix() {
- global $_configuration;
- return $_configuration['db_prefix'];
- }
- /**
- * Returns the course table prefix for single database.
- * Not certain exactly when this is used.
- * Do research.
- * It's used in local.inc.php.
- */
- public static function get_course_table_prefix() {
- global $_configuration;
- return $_configuration['table_prefix'];
- }
- /*
- Table name methods
- Use these methods to get table names for queries,
- instead of constructing them yourself.
- Backticks automatically surround the result,
- e.g. `COURSE_NAME`.`link`
- so the queries can look cleaner.
- Example:
- $table = Database::get_course_table(TABLE_DOCUMENT);
- $sql_query = "SELECT * FROM $table WHERE $condition";
- $sql_result = Database::query($sql_query);
- $result = Database::fetch_array($sql_result);
- */
- /**
- * A more generic method than the other get_main_xxx_table methods,
- * This one returns the correct complete name of any table of the main database of which you pass
- * the short name as a parameter.
- * Please, define table names as constants in this library and use them
- * instead of directly using magic words in your tool code.
- *
- * @param string $short_table_name, the name of the table
- */
- public static function get_main_table($short_table_name) {
- return self::format_table_name(self::get_main_database(), $short_table_name);
- }
- /**
- * A more generic method than the older get_course_xxx_table methods,
- * This one can return the correct complete name of any course table of which you pass
- * the short name as a parameter.
- * Please, define table names as constants in this library and use them
- * instead of directly using magic words in your tool code.
- *
- * @param string $short_table_name, the name of the table
- * @param string $database_name, optional, name of the course database
- * - if you don't specify this, you work on the current course.
- */
- public static function get_course_table($short_table_name, $database_name = '') {
- return self::format_glued_course_table_name(self::fix_database_parameter($database_name), $short_table_name);
- }
- /**
- * Gets a complete course table name from a course code
- *
- * @param string $course_code
- * @param string $table the name of the table
- */
- public static function get_course_table_from_code($course_code, $table) {
- $course_table = self::get_main_table(TABLE_MAIN_COURSE);
- $course_cat_table = self::get_main_table(TABLE_MAIN_CATEGORY);
- $result = self::fetch_array(self::query(
- "SELECT $course_table.db_name, $course_cat_table.code
- FROM $course_table
- LEFT JOIN $course_cat_table
- ON $course_table.category_code = $course_cat_table.code
- WHERE $course_table.code = '$course_code'
- LIMIT 1"));
- return sprintf("%s.%s", $result[0], $table);
- }
- /**
- * This generic method returns the correct and complete name of any statistic table
- * of which you pass the short name as a parameter.
- * Please, define table names as constants in this library and use them
- * instead of directly using magic words in your tool code.
- *
- * @param string $short_table_name, the name of the table
- */
- public static function get_statistic_table($short_table_name) {
- return self::format_table_name(self::get_statistic_database(), $short_table_name);
- }
- /**
- * This generic method returns the correct and complete name of any scorm
- * table of which you pass the short name as a parameter. Please, define
- * table names as constants in this library and use them instead of directly
- * using magic words in your tool code.
- *
- * @param string $short_table_name, the name of the table
- */
- public static function get_scorm_table($short_table_name) {
- return self::format_table_name(self::get_scorm_database(), $short_table_name);
- }
- /**
- * This generic method returns the correct and complete name of any scorm
- * table of which you pass the short name as a parameter. Please, define
- * table names as constants in this library and use them instead of directly
- * using magic words in your tool code.
- *
- * @param string $short_table_name, the name of the table
- */
- public static function get_user_personal_table($short_table_name) {
- return self::format_table_name(self::get_user_personal_database(), $short_table_name);
- }
- public static function get_course_chat_connected_table($database_name = '') {
- return self::format_glued_course_table_name(self::fix_database_parameter($database_name), CHAT_CONNECTED_TABLE);
- }
- /*
- Query methods
- These methods execute a query and return the result(s).
- */
- /**
- * @return a list (array) of all courses.
- * @todo shouldn't this be in the course.lib.php script?
- */
- public static function get_course_list() {
- $table = self::get_main_table(TABLE_MAIN_COURSE);
- return self::store_result(self::query("SELECT * FROM $table"));
- }
- /**
- * Returns an array with all database fields for the specified course.
- *
- * @param the real (system) code of the course (ID from inside the main course table)
- * @todo shouldn't this be in the course.lib.php script?
- */
- public static function get_course_info($course_code) {
- $course_code = self::escape_string($course_code);
- $table = self::get_main_table(TABLE_MAIN_COURSE);
- $result = self::generate_abstract_course_field_names(
- self::fetch_array(self::query("SELECT * FROM $table WHERE `code` = '$course_code'")));
- return $result === false ? array('db_name' => '') : $result;
- }
- /**
- * @param $user_id (integer): the id of the user
- * @return $user_info (array): user_id, lastname, firstname, username, email, ...
- * @author Patrick Cool <patrick.cool@UGent.be>, expanded to get info for any user
- * @author Roan Embrechts, first version + converted to Database API
- * @version 30 September 2004
- * @desc find all the information about a specified user. Without parameter this is the current user.
- * @todo shouldn't this be in the user.lib.php script?
- */
- public static function get_user_info_from_id($user_id = '') {
- if (empty($user_id)) {
- return $GLOBALS['_user'];
- }
- $table = self::get_main_table(TABLE_MAIN_USER);
- $user_id = self::escape_string($user_id);
- return self::generate_abstract_user_field_names(
- self::fetch_array(self::query("SELECT * FROM $table WHERE user_id = '$user_id'")));
- }
- /**
- * Returns course code from a given gradebook category's id
- * @param int Category ID
- * @return string Course code
- * @todo move this function in a gradebook-related library
- */
- public static function get_course_by_category($category_id) {
- $info = self::fetch_array(self::query('SELECT course_code FROM '.self::get_main_table(TABLE_MAIN_GRADEBOOK_CATEGORY).' WHERE id='.$category_id), 'ASSOC');
- return $info ? $info['course_code'] : false;
- }
- /**
- * This method creates an abstraction layer between database field names
- * and field names expected in code.
- *
- * This approach helps when changing database names.
- * It's also useful now to get rid of the 'franglais'.
- *
- * @todo add more array entries to abstract course info from field names
- * @author Roan Embrechts
- *
- * @todo What's the use of this method. I think this is better removed.
- * There should be consistency in the variable names and the use throughout the scripts
- * for the database name we should consistently use or db_name or database (db_name probably being the better one)
- */
- public static function generate_abstract_course_field_names($result_array) {
- $visual_code = isset($result_array['visual_code']) ? $result_array['visual_code'] : null;
- $code = isset($result_array['code']) ? $result_array['code'] : null;
- $title = isset($result_array['title']) ? $result_array['title'] : null;
- $db_name = isset($result_array['db_name']) ? $result_array['db_name'] : null;
- $category_code = isset($result_array['category_code']) ? $result_array['category_code'] : null;
- $result_array['official_code'] = $visual_code;
- $result_array['visual_code'] = $visual_code;
- $result_array['real_code'] = $code;
- $result_array['system_code'] = $code;
- $result_array['title'] = $title;
- $result_array['database'] = $db_name;
- $result_array['faculty'] = $category_code;
- //$result_array['directory'] = $result_array['directory'];
- /*
- still to do: (info taken from local.inc.php)
- $_course['id' ] = $cData['cours_id' ]; //auto-assigned integer
- $_course['name' ] = $cData['title' ];
- $_course['official_code'] = $cData['visual_code' ]; // use in echo
- $_course['sysCode' ] = $cData['code' ]; // use as key in db
- $_course['path' ] = $cData['directory' ]; // use as key in path
- $_course['dbName' ] = $cData['db_name' ]; // use as key in db list
- $_course['dbNameGlu' ] = $_configuration['table_prefix'] . $cData['dbName'] . $_configuration['db_glue']; // use in all queries
- $_course['titular' ] = $cData['tutor_name' ];
- $_course['language' ] = $cData['course_language' ];
- $_course['extLink' ]['url' ] = $cData['department_url' ];
- $_course['extLink' ]['name'] = $cData['department_name'];
- $_course['categoryCode'] = $cData['faCode' ];
- $_course['categoryName'] = $cData['faName' ];
- $_course['visibility' ] = (bool) ($cData['visibility'] == 2 || $cData['visibility'] == 3);
- $_course['registrationAllowed'] = (bool) ($cData['visibility'] == 1 || $cData['visibility'] == 2);
- */
- return $result_array;
- }
- /**
- * This method creates an abstraction layer between database field names
- * and field names expected in code.
- *
- * This helps when changing database names.
- * It's also useful now to get rid of the 'franglais'.
- *
- * @todo add more array entries to abstract user info from field names
- * @author Roan Embrechts
- * @author Patrick Cool
- *
- * @todo what's the use of this function. I think this is better removed.
- * There should be consistency in the variable names and the use throughout the scripts
- */
- public static function generate_abstract_user_field_names($result_array) {
- $result_array['firstName'] = $result_array['firstname'];
- $result_array['lastName'] = $result_array['lastname'];
- $result_array['mail'] = $result_array['email'];
- #$result_array['picture_uri'] = $result_array['picture_uri'];
- #$result_array ['user_id'] = $result_array['user_id'];
- return $result_array;
- }
- /**
- * Counts the number of rows in a table
- * @param string $table The table of which the rows should be counted
- * @return int The number of rows in the given table.
- */
- public static function count_rows($table) {
- $obj = self::fetch_object(self::query("SELECT COUNT(*) AS n FROM $table"));
- return $obj->n;
- }
- /*
- An intermediate API-layer between the system and the dabase server.
- */
- /**
- * Returns the number of affected rows in the last database operation.
- * @param resource $connection (optional) The database server connection, for detailed description see the method query().
- * @return int Returns the number of affected rows on success, and -1 if the last query failed.
- */
- public static function affected_rows($connection = null) {
- return self::use_default_connection($connection) ? mysql_affected_rows() : mysql_affected_rows($connection);
- }
- /**
- * Closes non-persistent database connection.
- * @param resource $connection (optional) The database server connection, for detailed description see the method query().
- * @return bool Returns TRUE on success or FALSE on failure.
- */
- public static function close($connection = null) {
- return self::use_default_connection($connection) ? mysql_close() : mysql_close($connection);
- }
- /**
- * Opens a connection to a database server.
- * @param array $parameters (optional) An array that contains the necessary parameters for accessing the server.
- * @return resource/boolean Returns a database connection on success or FALSE on failure.
- * Note: Currently the array could contain MySQL-specific parameters:
- * $parameters['server'], $parameters['username'], $parameters['password'],
- * $parameters['new_link'], $parameters['client_flags'], $parameters['persistent'].
- * For details see documentation about the functions mysql_connect() and mysql_pconnect().
- * @link http://php.net/manual/en/function.mysql-connect.php
- * @link http://php.net/manual/en/function.mysql-pconnect.php
- */
- public static function connect($parameters = array()) {
- // A MySQL-specific implementation.
- if (!isset($parameters['server'])) {
- $parameters['server'] = @ini_get('mysql.default_host');
- if (empty($parameters['server'])) {
- $parameters['server'] = 'localhost:3306';
- }
- }
- if (!isset($parameters['username'])) {
- $parameters['username'] = @ini_get('mysql.default_user');
- }
- if (!isset($parameters['password'])) {
- $parameters['password'] = @ini_get('mysql.default_password');
- }
- if (!isset($parameters['new_link'])) {
- $parameters['new_link'] = false;
- }
- if (!isset($parameters['client_flags'])) {
- $parameters['client_flags'] = 0;
- }
- return $parameters['persistent']
- ? mysql_pconnect($parameters['server'], $parameters['username'], $parameters['password'], $parameters['client_flags'])
- : mysql_connect($parameters['server'], $parameters['username'], $parameters['password'], $parameters['new_link'], $parameters['client_flags']);
- }
- /**
- * Returns the error number from the last operation done on the database server.
- * @param resource $connection (optional) The database server connection, for detailed description see the method query().
- * @return int Returns the error number from the last database (operation, or 0 (zero) if no error occurred.
- */
- public static function errno($connection = null) {
- return self::use_default_connection($connection) ? mysql_errno() : mysql_errno($connection);
- }
- /**
- * Returns the error text from the last operation done on the database server.
- * @param resource $connection (optional) The database server connection, for detailed description see the method query().
- * @return string Returns the error text from the last database operation, or '' (empty string) if no error occurred.
- */
- public static function error($connection = null) {
- return self::use_default_connection($connection) ? mysql_error() : mysql_error($connection);
- }
- /**
- * Escapes a string to insert into the database as text
- * @param string The string to escape
- * @param resource $connection (optional) The database server connection, for detailed description see the method query().
- * @return string The escaped string
- * @author Yannick Warnier <yannick.warnier@dokeos.com>
- * @author Patrick Cool <patrick.cool@UGent.be>, Ghent University
- */
- public static function escape_string($string, $connection = null) {
- return get_magic_quotes_gpc()
- ? (self::use_default_connection($connection)
- ? mysql_real_escape_string(stripslashes($string))
- : mysql_real_escape_string(stripslashes($string), $connection))
- : (self::use_default_connection($connection)
- ? mysql_real_escape_string($string)
- : mysql_real_escape_string($string, $connection));
- }
- /**
- * Gets the array from a SQL result (as returned by Database::query) - help achieving database independence
- * @param resource The result from a call to sql_query (e.g. Database::query)
- * @param string Optional: "ASSOC","NUM" or "BOTH", as the constant used in mysql_fetch_array.
- * @return array Array of results as returned by php
- * @author Yannick Warnier <yannick.warnier@dokeos.com>
- */
- public static function fetch_array($result, $option = 'BOTH') {
- return $option == 'ASSOC' ? mysql_fetch_array($result, MYSQL_ASSOC) : ($option == 'NUM' ? mysql_fetch_array($result, MYSQL_NUM) : mysql_fetch_array($result));
- }
- /**
- * Gets an associative array from a SQL result (as returned by Database::query).
- * This method is equivalent to calling Database::fetch_array() with 'ASSOC' value for the optional second parameter.
- * @param resource $result The result from a call to sql_query (e.g. Database::query).
- * @return array Returns an associative array that corresponds to the fetched row and moves the internal data pointer ahead.
- */
- public static function fetch_assoc($result) {
- return mysql_fetch_assoc($result);
- }
- /**
- * Gets the next row of the result of the SQL query (as returned by Database::query) in an object form
- * @param resource The result from a call to sql_query (e.g. Database::query)
- * @param string Optional class name to instanciate
- * @param array Optional array of parameters
- * @return object Object of class StdClass or the required class, containing the query result row
- * @author Yannick Warnier <yannick.warnier@dokeos.com>
- */
- public static function fetch_object($result, $class = null, $params = null) {
- return !empty($class) ? (is_array($params) ? mysql_fetch_object($result, $class, $params) : mysql_fetch_object($result, $class)) : mysql_fetch_object($result);
- }
- /**
- * Gets the array from a SQL result (as returned by Database::query) - help achieving database independence
- * @param resource The result from a call to sql_query (see Database::query()).
- * @return array Array of results as returned by php (mysql_fetch_row)
- */
- public static function fetch_row($result) {
- return mysql_fetch_row($result);
- }
- /**
- * Frees all the memory associated with the provided result identifier.
- * @return bool Returns TRUE on success or FALSE on failure.
- * Notes: Use this method if you are concerned about how much memory is being used for queries that return large result sets.
- * Anyway, all associated result memory is automatically freed at the end of the script's execution.
- */
- public static function free_result($result) {
- return mysql_free_result($result);
- }
- /**
- * Returns the database client library version.
- * @return strung Returns a string that represents the client library version.
- */
- public function get_client_info() {
- return mysql_get_client_info();
- }
- /**
- * Returns a list of databases created on the server. The list may contain all of the
- * available database names or filtered database names by using a pattern.
- * @param string $pattern (optional) A pattern for filtering database names as if it was needed for the SQL's LIKE clause, for example 'chamilo_%'.
- * @param resource $connection (optional) The database server connection, for detailed description see the method query().
- * @return array Returns in an array the retrieved list of database names.
- */
- public static function get_databases($pattern = '', $connection = null) {
- $result = array();
- $query_result = Database::query(!empty($pattern) ? "SHOW DATABASES LIKE '".self::escape_string($pattern, $connection)."'" : "SHOW DATABASES", $connection);
- while ($row = Database::fetch_row($query_result)) {
- $result[] = $row[0];
- }
- return $result;
- }
- /**
- * Returns a list of the fields that a given table contains. The list may contain all of the available field names or filtered field names by using a pattern.
- * By using a special option, this method is able to return an indexed list of fields' properties, where field names are keys.
- * @param string $table This is the examined table.
- * @param string $pattern (optional) A pattern for filtering field names as if it was needed for the SQL's LIKE clause, for example 'column_%'.
- * @param string $database (optional) The name of the targeted database. If it is omited, the current database is assumed, see Database::select_db().
- * @param bool $including_properties (optional) When this option is true, the returned result has the followong format:
- * array(field_name_1 => array(0 => property_1, 1 => property_2, ...), fieald_name_2 => array(0 => property_1, ...), ...)
- * @param resource $connection (optional) The database server connection, for detailed description see the method query().
- * @return array Returns in an array the retrieved list of field names.
- */
- public static function get_fields($table, $pattern = '', $database = '', $including_properties = false, $connection = null) {
- $result = array();
- $query = "SHOW COLUMNS FROM `".self::escape_string($table, $connection)."`";
- if (!empty($database)) {
- $query .= " FROM `".self::escape_string($database, $connection)."`";
- }
- if (!empty($pattern)) {
- $query .= " LIKE '".self::escape_string($pattern, $connection)."'";
- }
- $query_result = Database::query($query, $connection);
- if ($including_properties) {
- // Making an indexed list of the fields and their properties.
- while ($row = Database::fetch_row($query_result)) {
- $result[$row[0]] = $row;
- }
- } else {
- // Making a plain, flat list.
- while ($row = Database::fetch_row($query_result)) {
- $result[] = $row[0];
- }
- }
- return $result;
- }
- /**
- * Returns information about the type of the current connection and the server host name.
- * @param resource $connection (optional) The database server connection, for detailed description see the method query().
- * @return string/boolean Returns string data on success or FALSE on failure.
- */
- public function get_host_info($connection = null) {
- return self::use_default_connection($connection) ? mysql_get_host_info() : mysql_get_host_info($connection);
- }
- /**
- * Retrieves database client/server protocol version.
- * @param resource $connection (optional) The database server connection, for detailed description see the method query().
- * @return int/boolean Returns the protocol version on success or FALSE on failure.
- */
- public function get_proto_info($connection = null) {
- return self::use_default_connection($connection) ? mysql_get_proto_info() : mysql_get_proto_info($connection);
- }
- /**
- * Retrieves the database server version.
- * @param resource $connection (optional) The database server connection, for detailed description see the method query().
- * @return string/boolean Returns the MySQL server version on success or FALSE on failure.
- */
- public function get_server_info($connection = null) {
- return self::use_default_connection($connection) ? mysql_get_server_info() : mysql_get_server_info($connection);
- }
- /**
- * Returns a list of tables within a database. The list may contain all of the
- * available table names or filtered table names by using a pattern.
- * @param string $database (optional) The name of the examined database. If it is omited, the current database is assumed, see Database::select_db().
- * @param string $pattern (optional) A pattern for filtering table names as if it was needed for the SQL's LIKE clause, for example 'access_%'.
- * @param resource $connection (optional) The database server connection, for detailed description see the method query().
- * @return array Returns in an array the retrieved list of table names.
- */
- public static function get_tables($database = '', $pattern = '', $connection = null) {
- $result = array();
- $query = "SHOW TABLES";
- if (!empty($database)) {
- $query .= " FROM `".self::escape_string($database, $connection)."`";
- }
- if (!empty($pattern)) {
- $query .= " LIKE '".self::escape_string($pattern, $connection)."'";
- }
- $query_result = Database::query($query, $connection);
- while ($row = Database::fetch_row($query_result)) {
- $result[] = $row[0];
- }
- return $result;
- }
- /**
- * Gets the ID of the last item inserted into the database
- * @param resource $connection (optional) The database server connection, for detailed description see the method query().
- * @return int The last ID as returned by the DB function
- * @comment This should be updated to use ADODB at some point
- */
- public static function insert_id($connection = null) {
- return self::use_default_connection($connection) ? mysql_insert_id() : mysql_insert_id($connection);
- }
- /**
- * Gets the number of rows from the last query result - help achieving database independence
- * @param resource The result
- * @return integer The number of rows contained in this result
- * @author Yannick Warnier <yannick.warnier@dokeos.com>
- **/
- public static function num_rows($result) {
- return is_resource($result) ? mysql_num_rows($result) : false;
- }
- /**
- * Acts as the relative *_result() function of most DB drivers and fetches a
- * specific line and a field
- * @param resource The database resource to get data from
- * @param integer The row number
- * @param string Optional field name or number
- * @result mixed One cell of the result, or FALSE on error
- */
- public static function result($resource, $row, $field = '') {
- return self::num_rows($resource) > 0 ? (!empty($field) ? mysql_result($resource, $row, $field) : mysql_result($resource, $row)) : null;
- }
- /**
- * This method returns a resource
- * Documentation has been added by Arthur Portugal
- * Some adaptations have been implemented by Ivan Tcholakov, 2009, 2010
- * @author Olivier Brouckaert
- * @param string $query The SQL query
- * @param resource $connection (optional) The database server (MySQL) connection.
- * If it is not specified, the connection opened by mysql_connect() is assumed.
- * If no connection is found, the server will try to create one as if mysql_connect() was called with no arguments.
- * If no connection is found or established, an E_WARNING level error is generated.
- * @param string $file (optional) On error it shows the file in which the error has been trigerred (use the "magic" constant __FILE__ as input parameter)
- * @param string $line (optional) On error it shows the line in which the error has been trigerred (use the "magic" constant __LINE__ as input parameter)
- * @return resource The returned result from the query
- * Note: The parameter $connection could be skipped. Here are examples of this method usage:
- * Database::query($query);
- * $result = Database::query($query);
- * Database::query($query, $connection);
- * $result = Database::query($query, $connection);
- * The following ways for calling this method are obsolete:
- * Database::query($query, __FILE__, __LINE__);
- * $result = Database::query($query, __FILE__, __LINE__);
- * Database::query($query, $connection, __FILE__, __LINE__);
- * $result = Database::query($query, $connection, __FILE__, __LINE__);
- */
- public static function query($query, $connection = null, $file = null, $line = null) {
- $use_default_connection = self::use_default_connection($connection);
- if ($use_default_connection) {
- // Let us do parameter shifting, thus the method would be similar
- // (in regard to parameter order) to the original function mysql_query().
- $line = $file;
- $file = $connection;
- $connection = null;
- }
- if (!($result = $use_default_connection ? @mysql_query($query) : @mysql_query($query, $connection))) {
- $backtrace = debug_backtrace(); // Retrieving information about the caller statement.
- if (isset($backtrace[0])) {
- $caller = & $backtrace[0];
- } else {
- $caller = array();
- }
- if (isset($backtrace[1])) {
- $owner = & $backtrace[1];
- } else {
- $owner = array();
- }
- if (empty($file)) {
- $file = $caller['file'];
- }
- if (empty($line) && $line !== false) {
- $line = $caller['line'];
- }
- $type = $owner['type'];
- $function = $owner['function'];
- $class = $owner['class'];
- $server_type = api_get_setting('server_type');
- if (!empty($line) && !empty($server_type) && $server_type != 'production') {
- $info = '<pre>' .
- '<strong>DATABASE ERROR #'.self::errno($connection).':</strong><br /> ' .
- self::remove_XSS(self::error($connection)) . '<br />' .
- '<strong>QUERY :</strong><br /> ' .
- self::remove_XSS($query) . '<br />' .
- '<strong>FILE :</strong><br /> ' .
- (empty($file) ? ' unknown ' : $file) . '<br />' .
- '<strong>LINE :</strong><br /> ' .
- (empty($line) ? ' unknown ' : $line) . '<br />';
- if (empty($type)) {
- if (!empty($function)) {
- $info .= '<strong>FUNCTION :</strong><br /> ' . $function;
- }
- } else {
- if (!empty($class) && !empty($function)) {
- $info .= '<strong>CLASS :</strong><br /> ' . $class . '<br />';
- $info .= '<strong>METHOD :</strong><br /> ' . $function;
- }
- }
- $info .= '</pre>';
- echo $info;
- }
- }
- return $result;
- }
- /**
- * Selects a database.
- * @param string $database_name The name of the database that is to be selected.
- * @param resource $connection (optional) The database server connection, for detailed description see the method query().
- * @return bool Returns TRUE on success or FALSE on failure.
- */
- public static function select_db($database_name, $connection = null) {
- return self::use_default_connection($connection) ? mysql_select_db($database_name) : mysql_select_db($database_name, $connection);
- }
- /**
- * Stores a query result into an array.
- *
- * @author Olivier Brouckaert
- * @param resource $result - the return value of the query
- * @param option BOTH, ASSOC, or NUM
- * @return array - the value returned by the query
- */
- public static function store_result($result, $option = 'BOTH') {
- $array = array();
- if ($result !== false) { // For isolation from database engine's behaviour.
- while ($row = self::fetch_array($result, $option)) {
- $array[] = $row;
- }
- }
- return $array;
- }
- /*
- Encodings and collations supported by MySQL database server
- */
- /**
- * Checks whether a given encoding is supported by the database server.
- * @param string $encoding The encoding (a system conventional id, for example 'UTF-8') to be checked.
- * @return bool Returns a boolean value as a check-result.
- * @author Ivan Tcholakov
- */
- public static function is_encoding_supported($encoding) {
- static $supported = array();
- if (!isset($supported[$encoding])) {
- $supported[$encoding] = false;
- if (strlen($db_encoding = self::to_db_encoding($encoding)) > 0) {
- if (self::num_rows(self::query("SHOW CHARACTER SET WHERE Charset = '".self::escape_string($db_encoding)."';")) > 0) {
- $supported[$encoding] = true;
- }
- }
- }
- return $supported[$encoding];
- }
- /**
- * Constructs a SQL clause about default character set and default collation for newly created databases and tables.
- * Example: Database::make_charset_clause('UTF-8', 'bulgarian') returns
- * DEFAULT CHARACTER SET `utf8` DEFAULT COLLATE `utf8_general_ci`
- * @param string $encoding (optional) The default database/table encoding (a system conventional id) to be used.
- * @param string $language (optional) Language (a system conventional id) used for choosing language sensitive collation (if it is possible).
- * @return string Returns the constructed SQL clause or empty string if $encoding is not correct or is not supported.
- * @author Ivan Tcholakov
- */
- public static function make_charset_clause($encoding = null, $language = null) {
- if (empty($encoding)) {
- $encoding = api_get_system_encoding();
- }
- if (empty($language)) {
- $language = api_get_interface_language();
- }
- $charset_clause = '';
- if (self::is_encoding_supported($encoding)) {
- $db_encoding = Database::to_db_encoding($encoding);
- $charset_clause .= " DEFAULT CHARACTER SET `".$db_encoding."`";
- $db_collation = Database::to_db_collation($encoding, $language);
- if (!empty($db_collation)) {
- $charset_clause .= " DEFAULT COLLATE `".$db_collation."`";
- }
- }
- return $charset_clause;
- }
- /**
- * Converts an encoding identificator to MySQL-specific encoding identifictor,
- * i.e. 'UTF-8' --> 'utf8'.
- * @param string $encoding The conventional encoding identificator.
- * @return string Returns the corresponding MySQL-specific encoding identificator if any, otherwise returns NULL.
- * @author Ivan Tcholakov
- */
- public static function to_db_encoding($encoding) {
- static $result = array();
- if (!isset($result[$encoding])) {
- $result[$encoding] = null;
- $encoding_map = & self::get_db_encoding_map();
- foreach ($encoding_map as $key => $value) {
- if (api_equal_encodings($encoding, $key)) {
- $result[$encoding] = $value;
- break;
- }
- }
- }
- return $result[$encoding];
- }
- /**
- * Converts a MySQL-specific encoding identifictor to conventional encoding identificator,
- * i.e. 'utf8' --> 'UTF-8'.
- * @param string $encoding The MySQL-specific encoding identificator.
- * @return string Returns the corresponding conventional encoding identificator if any, otherwise returns NULL.
- * @author Ivan Tcholakov
- */
- public static function from_db_encoding($db_encoding) {
- static $result = array();
- if (!isset($result[$db_encoding])) {
- $result[$db_encoding] = null;
- $encoding_map = & self::get_db_encoding_map();
- foreach ($encoding_map as $key => $value) {
- if (strtolower($db_encoding) == $value) {
- $result[$db_encoding] = $key;
- break;
- }
- }
- }
- return $result[$db_encoding];
- }
- /**
- * Chooses the default MySQL-specific collation from given encoding and language.
- * @param string $encoding A conventional encoding id, i.e. 'UTF-8'
- * @param string $language (optional) A conventional for the system language id, i.e. 'bulgarian'. If it is empty, the chosen collation is the default server value corresponding to the given encoding.
- * @return string Returns a suitable default collation, for example 'utf8_general_ci', or NULL if collation was not found.
- * @author Ivan Tcholakov
- */
- public static function to_db_collation($encoding, $language = null) {
- static $result = array();
- if (!isset($result[$encoding][$language])) {
- $result[$encoding][$language] = null;
- if (self::is_encoding_supported($encoding)) {
- $db_encoding = self::to_db_encoding($encoding);
- if (!empty($language)) {
- $lang = api_purify_language_id($language);
- $res = self::check_db_collation($db_encoding, $lang);
- if (empty($res)) {
- $db_collation_map = & self::get_db_collation_map();
- if (isset($db_collation_map[$lang])) {
- $res = self::check_db_collation($db_encoding, $db_collation_map[$lang]);
- }
- }
- if (empty($res)) {
- $res = self::check_db_collation($db_encoding, null);
- }
- $result[$encoding][$language] = $res;
- } else {
- $result[$encoding][$language] = self::check_db_collation($db_encoding, null);
- }
- }
- }
- return $result[$encoding][$language];
- }
- /*
- Private methods
- You should not access these from outside the class
- No effort is made to keep the names / results the same.
- */
- /**
- * Glues a course database.
- * glue format from local.inc.php.
- */
- private static function glue_course_database_name($database_name) {
- return self::get_course_table_prefix().$database_name.self::get_database_glue();
- }
- /**
- * @param string $database_name, can be empty to use current course db
- *
- * @return the glued parameter if it is not empty,
- * or the current course database (glued) if the parameter is empty.
- */
- private static function fix_database_parameter($database_name) {
- if (empty($database_name)) {
- $course_info = api_get_course_info();
- return $course_info['dbNameGlu'];
- }
- return self::glue_course_database_name($database_name);
- }
- /**
- * Structures a course database and table name to ready them
- * for querying. The course database parameter is considered glued:
- * e.g. COURSE001`.`
- */
- private static function format_glued_course_table_name($database_name_with_glue, $table) {
- return '`'.$database_name_with_glue.$table.'`';
- }
- /**
- * Structures a database and table name to ready them
- * for querying. The database parameter is considered not glued,
- * just plain e.g. COURSE001
- */
- private static function format_table_name($database, $table) {
- return '`'.$database.'`.`'.$table.'`';
- }
- /**
- * This private method is to be used by the other methods in this class for
- * checking whether the input parameter $connection actually has been provided.
- * If the input parameter connection is not a resource or if it is not FALSE (in case of error)
- * then the default opened connection should be used by the called method.
- * @param resource/boolean $connection The checked parameter $connection.
- * @return boolean TRUE means that calling method should use the default connection.
- * FALSE means that (valid) parameter $connection has been provided and it should be used.
- */
- private static function use_default_connection($connection) {
- return !is_resource($connection) && $connection !== false;
- }
- /**
- * This private method tackles the XSS injections. It is similar to Security::remove_XSS() and works always,
- * including the time of initialization when the class Security has not been loaded yet.
- * @param string The input variable to be filtered from XSS, in this class it is expected to be a string.
- * @return string Returns the filtered string as a result.
- */
- private static function remove_XSS(& $var) {
- return class_exists('Security') && class_exists('HTMLPurifier') ? Security::remove_XSS($var) : api_htmlentities($var, ENT_QUOTES);
- }
- /**
- * This private method encapsulates a table with relations between
- * conventional and MuSQL-specific encoding identificators.
- * @author Ivan Tcholakov
- */
- private static function & get_db_encoding_map() {
- static $encoding_map = array(
- 'ARMSCII-8' => 'armscii8',
- 'BIG5' => 'big5',
- 'BINARY' => 'binary',
- 'CP866' => 'cp866',
- 'EUC-JP' => 'ujis',
- 'EUC-KR' => 'euckr',
- 'GB2312' => 'gb2312',
- 'GBK' => 'gbk',
- 'ISO-8859-1' => 'latin1',
- 'ISO-8859-2' => 'latin2',
- 'ISO-8859-7' => 'greek',
- 'ISO-8859-8' => 'hebrew',
- 'ISO-8859-9' => 'latin5',
- 'ISO-8859-13' => 'latin7',
- 'ISO-8859-15' => 'latin1',
- 'KOI8-R' => 'koi8r',
- 'KOI8-U' => 'koi8u',
- 'SHIFT-JIS' => 'sjis',
- 'TIS-620' => 'tis620',
- 'US-ASCII' => 'ascii',
- 'UTF-8' => 'utf8',
- 'WINDOWS-1250' => 'cp1250',
- 'WINDOWS-1251' => 'cp1251',
- 'WINDOWS-1252' => 'latin1',
- 'WINDOWS-1256' => 'cp1256',
- 'WINDOWS-1257' => 'cp1257'
- );
- return $encoding_map;
- }
- /**
- * A helper language id translation table for choosing some collations.
- * @author Ivan Tcholakov
- */
- private static function & get_db_collation_map() {
- static $db_collation_map = array(
- 'german' => 'german2',
- 'simpl_chinese' => 'chinese',
- 'trad_chinese' => 'chinese',
- 'turkce' => 'turkish'
- );
- return $db_collation_map;
- }
- /**
- * Constructs a MySQL-specific collation and checks whether it is supported by the database server.
- * @param string $db_encoding A MySQL-specific encoding id, i.e. 'utf8'
- * @param string $language A MySQL-compatible language id, i.e. 'bulgarian'
- * @return string Returns a suitable default collation, for example 'utf8_general_ci', or NULL if collation was not found.
- * @author Ivan Tcholakov
- */
- private static function check_db_collation($db_encoding, $language) {
- if (empty($db_encoding)) {
- return null;
- }
- if (empty($language)) {
- $result = self::fetch_array(self::query("SHOW COLLATION WHERE Charset = '".self::escape_string($db_encoding)."' AND `Default` = 'Yes';"), 'NUM');
- return $result ? $result[0] : null;
- }
- $collation = $db_encoding.'_'.$language.'_ci';
- $query_result = self::query("SHOW COLLATION WHERE Charset = '".self::escape_string($db_encoding)."';");
- while ($result = self::fetch_array($query_result, 'NUM')) {
- if ($result[0] == $collation) {
- return $collation;
- }
- }
- return null;
- }
- /*
- DEPRECATED METHODS
- */
- /**
- * @deprecated Use api_get_language_isocode($language) instead.
- */
- public static function get_language_isocode($language) {
- return api_get_language_isocode($language);
- }
- /**
- * @deprecated Use Database::insert_id() instead.
- */
- public static function get_last_insert_id() {
- return mysql_insert_id();
- }
- }
- //end class Database
|