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- <?php
- /* For licensing terms, see /license.txt*/
- /**
- * This is the course library for Chamilo.
- *
- * All main course functions should be placed here.
- *
- * Many functions of this library deal with providing support for
- * virtual/linked/combined courses (this was already used in several universities
- * but not available in standard Chamilo).
- *
- * The implementation changed, initially a course was a real course
- * if target_course_code was 0 , this was changed to NULL.
- * There are probably some places left with the wrong code.
- *
- * @package chamilo.library
- */
- /**
- DOCUMENTATION
- (list not up to date, you can auto generate documentation with phpDocumentor)
- CourseManager::get_real_course_code_select_html($element_name, $has_size=true, $only_current_user_courses=true)
- CourseManager::check_parameter($parameter, $error_message)
- CourseManager::check_parameter_or_fail($parameter, $error_message)
- CourseManager::course_code_exists($wanted_course_code)
- CourseManager::get_real_course_list()
- CourseManager::get_virtual_course_list()
- GENERAL COURSE FUNCTIONS
- CourseManager::get_access_settings($course_code)
- CourseManager::set_course_tool_visibility($tool_table_id, $visibility)
- CourseManager::get_user_in_course_status($user_id, $course_code)
- CourseManager::add_user_to_course($user_id, $course_code)
- CourseManager::get_virtual_course_info($real_course_code)
- CourseManager::is_virtual_course_from_visual_code($visual_code)
- CourseManager::is_virtual_course_from_system_code($system_code)
- CourseManager::get_virtual_courses_linked_to_real_course($real_course_code)
- CourseManager::get_list_of_virtual_courses_for_specific_user_and_real_course($user_id, $real_course_code)
- CourseManager::has_virtual_courses_from_code($real_course_code, $user_id)
- CourseManager::get_target_of_linked_course($virtual_course_code)
- TITLE AND CODE FUNCTIONS
- CourseManager::determine_course_title_from_course_info($user_id, $course_info)
- CourseManager::create_combined_name($user_is_registered_in_real_course, $real_course_name, $virtual_course_list)
- CourseManager::create_combined_code($user_is_registered_in_real_course, $real_course_code, $virtual_course_list)
- USER FUNCTIONS
- CourseManager::get_real_course_list_of_user_as_course_admin($user_id)
- CourseManager::get_course_list_of_user_as_course_admin($user_id)
- CourseManager::is_user_subscribed_in_course($user_id, $course_code)
- CourseManager::is_user_subscribed_in_real_or_linked_course($user_id, $course_code)
- CourseManager::get_user_list_from_course_code($course_code)
- CourseManager::get_real_and_linked_user_list($course_code);
- GROUP FUNCTIONS
- CourseManager::get_group_list_of_course($course_code)
- CREATION FUNCTIONS
- CourseManager::attempt_create_virtual_course($real_course_code, $course_title, $wanted_course_code, $course_language, $course_category)
- */
- /* INIT SECTION */
- /**
- * Configuration files
- */
- require_once api_get_path(CONFIGURATION_PATH).'add_course.conf.php';
- require_once api_get_path(LIBRARY_PATH).'add_course.lib.inc.php';
- /**
- * Constants definition
- */
- //LOGIC: course visibility and registration settings
- /*
- COURSE VISIBILITY
- MAPPING OLD SETTINGS TO NEW SETTINGS
- -----------------------
- NOT_VISIBLE_NO_SUBSCRIPTION_ALLOWED
- --> COURSE_VISIBILITY_REGISTERED, SUBSCRIBE_NOT_ALLOWED
- NOT_VISIBLE_SUBSCRIPTION_ALLOWED
- --> COURSE_VISIBILITY_REGISTERED, SUBSCRIBE_ALLOWED
- VISIBLE_SUBSCRIPTION_ALLOWED
- --> COURSE_VISIBILITY_OPEN_PLATFORM, SUBSCRIBE_ALLOWED
- VISIBLE_NO_SUBSCRIPTION_ALLOWED
- --> COURSE_VISIBILITY_OPEN_PLATFORM, SUBSCRIBE_NOT_ALLOWED
- */
- //OLD SETTINGS
- define('NOT_VISIBLE_NO_SUBSCRIPTION_ALLOWED', 0);
- define('NOT_VISIBLE_SUBSCRIPTION_ALLOWED', 1);
- define('VISIBLE_SUBSCRIPTION_ALLOWED', 2);
- define('VISIBLE_NO_SUBSCRIPTION_ALLOWED', 3);
- /**
- * Variables
- */
- $TABLECOURSE = Database::get_main_table(TABLE_MAIN_COURSE);
- $TABLECOURSDOMAIN = Database::get_main_table(TABLE_MAIN_CATEGORY);
- $TABLEUSER = Database::get_main_table(TABLE_MAIN_USER);
- $TABLECOURSUSER = Database::get_main_table(TABLE_MAIN_COURSE_USER);
- $TABLEANNOUNCEMENTS = 'announcement';
- $coursesRepositories = $_configuration['root_sys'];
- /**
- * CourseManager Class
- * @package chamilo.library
- */
- class CourseManager {
-
- var $columns = array();
-
-
- /**
- * Creates a course
- * @param array with the columns in the main.course table
- * @param mixed false if the course was not created, array with the course info
- */
- function create_course($params) {
- global $_configuration;
-
- if (empty($params['title'])) {
- return false;
- }
-
- if (empty($params['wanted_code'])) {
- $params['wanted_code'] = $params['title'];
- // Check whether the requested course code has already been occupied.
- $dbnamelength = strlen($_configuration['db_prefix']);
- // Ensure the database prefix + database name do not get over 40 characters.
- $maxlength = 40 - $dbnamelength;
- $params['wanted_code'] = generate_course_code(api_substr($params['title'], 0, $maxlength));
- }
- // Create the course immediately
- $keys = define_course_keys($params['wanted_code']);
-
- $params['exemplary_content'] = isset($params['exemplary_content']) ? $params['exemplary_content'] : false;
-
- if (count($keys)) {
-
- $params['code'] = $keys['currentCourseCode'];
- $params['visual_code'] = $keys['currentCourseId'];
- $params['directory'] = $keys['currentCourseRepository'];
-
- $course_info = api_get_course_info($params['code']);
-
- if (empty($course_info)) {
- $course_id = register_course($params);
- $course_info = api_get_course_info_by_id($course_id);
-
- if (!empty($course_info)) {
- prepare_course_repository($course_info['directory'], $course_info['code']);
- $pictures_array = fill_course_repository($course_info['directory'], $params['exemplary_content']);
- fill_Db_course($course_id, $course_info['directory'], $course_info['course_language'], $pictures_array, $params['exemplary_content']);
-
- self::update_course_ranking($course_info['real_id'], 0);
-
- return $course_info;
- }
- }
- }
- return false;
- }
- /**
- * Returns all the information of a given coursecode
- * @param string $course_code, the course code
- * @return an array with all the fields of the course table
- * @author Patrick Cool <patrick.cool@UGent.be>, Ghent University
- */
- public static function get_course_information($course_code) {
- return Database::fetch_array(Database::query(
- "SELECT *, id as real_id FROM ".Database::get_main_table(TABLE_MAIN_COURSE)."
- WHERE code='".Database::escape_string($course_code)."'"),'ASSOC'
- );
- }
-
- /**
- * Returns all the information of a given coursecode
- * @param int the course id
- * @return an array with all the fields of the course table
- */
- public static function get_course_information_by_id($course_id) {
- return Database::select('*, id as real_id', Database::get_main_table(TABLE_MAIN_COURSE), array('where'=>array('id = ?' =>intval($course_id))),'first');
- }
-
- /**
- * Returns a list of courses. Should work with quickform syntax
- * @param integer Offset (from the 7th = '6'). Optional.
- * @param integer Number of results we want. Optional.
- * @param string The column we want to order it by. Optional, defaults to first column.
- * @param string The direction of the order (ASC or DESC). Optional, defaults to ASC.
- * @param string The visibility of the course, or all by default.
- * @param string If defined, only return results for which the course *title* begins with this string
- */
- public static function get_courses_list($from = 0, $howmany = 0, $orderby = 1, $orderdirection = 'ASC', $visibility = -1, $startwith = '') {
- $sql = "SELECT * FROM ".Database::get_main_table(TABLE_MAIN_COURSE)." ";
- if (!empty($startwith)) {
- $sql .= "WHERE title LIKE '".Database::escape_string($startwith)."%' ";
- if ($visibility !== -1 && $visibility == strval(intval($visibility))) {
- $sql .= " AND visibility = $visibility ";
- }
- } else {
- $sql .= "WHERE 1 ";
- if ($visibility !== -1 && $visibility == strval(intval($visibility))) {
- $sql .= " AND visibility = $visibility ";
- }
- }
- if (!empty($orderby)) {
- $sql .= " ORDER BY ".Database::escape_string($orderby)." ";
- } else {
- $sql .= " ORDER BY 1 ";
- }
- if (!in_array($orderdirection, array('ASC', 'DESC'))) {
- $sql .= 'ASC';
- } else {
- $sql .= Database::escape_string($orderdirection);
- }
- if (!empty($howmany) && is_int($howmany) and $howmany > 0) {
- $sql .= ' LIMIT '.Database::escape_string($howmany);
- } else {
- $sql .= ' LIMIT 1000000'; //virtually no limit
- }
- if (!empty($from)) {
- $from = intval($from);
- $sql .= ' OFFSET '.Database::escape_string($from);
- } else {
- $sql .= ' OFFSET 0';
- }
-
- return Database::store_result(Database::query($sql));
- }
- /**
- * Returns the access settings of the course:
- * which visibility;
- * wether subscribing is allowed;
- * wether unsubscribing is allowed.
- *
- * @param string $course_code, the course code
- * @todo for more consistency: use course_info call from database API
- * @return an array with int fields "visibility", "subscribe", "unsubscribe"
- */
- public static function get_access_settings($course_code) {
- return Database::fetch_array(Database::query(
- "SELECT visibility, subscribe, unsubscribe from ".Database::get_main_table(TABLE_MAIN_COURSE)."
- WHERE code = '".Database::escape_string($course_code)."'")
- );
- }
- /**
- * Returns the status of a user in a course, which is COURSEMANAGER or STUDENT.
- * @param int User ID
- * @param string Course code
- * @return int the status of the user in that course
- */
- public static function get_user_in_course_status($user_id, $course_code) {
- $result = Database::fetch_array(Database::query(
- "SELECT status FROM ".Database::get_main_table(TABLE_MAIN_COURSE_USER)."
- WHERE course_code = '".Database::escape_string($course_code)."' AND user_id = ".Database::escape_string($user_id))
- );
- return $result['status'];
- }
-
- public static function get_tutor_in_course_status($user_id, $course_code) {
- $result = Database::fetch_array(Database::query(
- "SELECT tutor_id FROM ".Database::get_main_table(TABLE_MAIN_COURSE_USER)."
- WHERE course_code = '".Database::escape_string($course_code)."' AND user_id = ".Database::escape_string($user_id))
- );
- return $result['tutor_id'];
- }
-
- /**
- * Unsubscribe one or more users from a course
- *
- * @param mixed user_id or an array with user ids
- * @param int session id
- * @param string course code
- *
- */
- public static function unsubscribe_user($user_id, $course_code, $session_id = 0) {
- if (!is_array($user_id)) {
- $user_id = array($user_id);
- }
- if (count($user_id) == 0) {
- return;
- }
- $table_user = Database :: get_main_table(TABLE_MAIN_USER);
-
- if (!empty($session_id)) {
- $session_id = intval($session_id);
- } else {
- $session_id = intval($_SESSION['id_session']);
- }
- //Cleaning the $user_id variable
- if (is_array($user_id)) {
- $new_user_id_list = array();
- foreach($user_id as $my_user_id) {
- $new_user_id_list[]= intval($my_user_id);
- }
- $new_user_id_list = array_filter($new_user_id_list);
- $user_ids = implode(',', $new_user_id_list);
- } else {
- $user_ids = intval($user_id);
- }
-
- $course_info = api_get_course_info($course_code);
- $course_id = $course_info['real_id'];
- // Unsubscribe user from all groups in the course.
- Database::query("DELETE FROM ".Database::get_course_table(TABLE_GROUP_USER)." WHERE c_id = $course_id AND user_id IN (".$user_ids.")");
- Database::query("DELETE FROM ".Database::get_course_table(TABLE_GROUP_TUTOR)." WHERE c_id = $course_id AND user_id IN (".$user_ids.")");
- // Erase user student publications (works) in the course - by André Boivin
- //@todo field student_publication.author should be the user id
-
- $sqlu = "SELECT * FROM $table_user WHERE user_id IN (".$user_ids.")";
- $resu = Database::query($sqlu);
- $username = Database::fetch_array($resu,'ASSOC');
- $userfirstname = $username['firstname'];
- $userlastname = $username['lastname'];
- $publication_name = $userfirstname.' '.$userlastname ;
-
- $table_course_user_publication = Database :: get_course_table(TABLE_STUDENT_PUBLICATION);
- $sql = "DELETE FROM $table_course_user_publication WHERE c_id = $course_id AND author = '".Database::escape_string($publication_name)."'";
- Database::query($sql);
- // Unsubscribe user from all blogs in the course.
- Database::query("DELETE FROM ".Database::get_course_table(TABLE_BLOGS_REL_USER)." WHERE c_id = $course_id AND user_id IN (".$user_ids.")");
- Database::query("DELETE FROM ".Database::get_course_table(TABLE_BLOGS_TASKS_REL_USER)."WHERE c_id = $course_id AND user_id IN (".$user_ids.")");
- //Deleting users in forum_notification and mailqueue course tables
- $sql_delete_forum_notification = "DELETE FROM ".Database::get_course_table(TABLE_FORUM_NOTIFICATION)." WHERE c_id = $course_id AND user_id IN (".$user_ids.")";
- Database::query($sql_delete_forum_notification);
- $sql_delete_mail_queue = "DELETE FROM ".Database::get_course_table(TABLE_FORUM_MAIL_QUEUE)." WHERE c_id = $course_id AND user_id IN (".$user_ids.")";
- Database::query($sql_delete_mail_queue);
- // Unsubscribe user from the course.
- if (!empty($session_id)) {
- // Delete in table session_rel_course_rel_user
- Database::query("DELETE FROM ".Database::get_main_table(TABLE_MAIN_SESSION_COURSE_USER)."
- WHERE id_session ='".$session_id."' AND course_code = '".Database::escape_string($_SESSION['_course']['id'])."' AND id_user IN ($user_ids)");
- foreach ($user_id as $uid) {
- // check if a user is register in the session with other course
- $sql = "SELECT id_user FROM ".Database::get_main_table(TABLE_MAIN_SESSION_COURSE_USER)." WHERE id_session='$session_id' AND id_user='$uid'";
- $rs = Database::query($sql);
- if (Database::num_rows($rs) == 0) {
- // Delete in table session_rel_user
- Database::query("DELETE FROM ".Database::get_main_table(TABLE_MAIN_SESSION_USER)."
- WHERE id_session ='".$session_id."' AND id_user='$uid' AND relation_type<>".SESSION_RELATION_TYPE_RRHH."");
- }
- }
- // Update the table session
- $row = Database::fetch_array(Database::query("SELECT COUNT(*) FROM ".Database::get_main_table(TABLE_MAIN_SESSION_USER)."
- WHERE id_session = '".$session_id."' AND relation_type<>".SESSION_RELATION_TYPE_RRHH." "));
- $count = $row[0]; // number of users by session
- $result = Database::query("UPDATE ".Database::get_main_table(TABLE_MAIN_SESSION)." SET nbr_users = '$count'
- WHERE id = '".$session_id."'");
- // Update the table session_rel_course
- $row = Database::fetch_array(@Database::query("SELECT COUNT(*) FROM ".Database::get_main_table(TABLE_MAIN_SESSION_COURSE_USER)." WHERE id_session = '$session_id' AND course_code = '$course_code' AND status<>2" ));
- $count = $row[0]; // number of users by session and course
- $result = @Database::query("UPDATE ".Database::get_main_table(TABLE_MAIN_SESSION_COURSE)." SET nbr_users = '$count' WHERE id_session = '$session_id' AND course_code = '$course_code' ");
- } else {
- Database::query("DELETE FROM ".Database::get_main_table(TABLE_MAIN_COURSE_USER)."
- WHERE user_id IN (".$user_ids.") AND relation_type<>".COURSE_RELATION_TYPE_RRHH." AND course_code = '".$course_code."'");
- // add event to system log
- $user_id = api_get_user_id();
- event_system(LOG_UNSUBSCRIBE_USER_FROM_COURSE, LOG_COURSE_CODE, $course_code, api_get_utc_datetime(), $user_id);
- }
- }
- /**
- * Subscribe a user to a course. No checks are performed here to see if
- * course subscription is allowed.
- * @param int User ID
- * @param string Course code
- * @param int Status (STUDENT, COURSEMANAGER, COURSE_ADMIN, NORMAL_COURSE_MEMBER)
- * @return bool True on success, false on failure
- * @see add_user_to_course
- */
- public static function subscribe_user($user_id, $course_code, $status = STUDENT, $session_id = 0) {
- if ($user_id != strval(intval($user_id))) {
- return false; //detected possible SQL injection
- }
- $course_code = Database::escape_string($course_code);
- if (empty ($user_id) || empty ($course_code)) {
- return false;
- }
-
- if (!empty($session_id)) {
- $session_id = intval($session_id);
- } else {
- $session_id = intval($_SESSION['id_session']);
- }
- $status = ($status == STUDENT || $status == COURSEMANAGER) ? $status : STUDENT;
- $role_id = ($status == COURSEMANAGER) ? COURSE_ADMIN : NORMAL_COURSE_MEMBER;
- // A preliminary check whether the user has bben already registered on the platform.
- if (Database::num_rows(@Database::query("SELECT status FROM ".Database::get_main_table(TABLE_MAIN_USER)."
- WHERE user_id = '$user_id' ")) == 0) {
- return false; // The user has not been registered to the platform.
- }
- // Check whether the user has not been already subscribed to the course.
- if (empty($session_id)) {
- if (Database::num_rows(@Database::query("SELECT * FROM ".Database::get_main_table(TABLE_MAIN_COURSE_USER)."
- WHERE user_id = '$user_id' AND relation_type<>".COURSE_RELATION_TYPE_RRHH." AND course_code = '$course_code'")) > 0) {
- return false; // The user has been already subscribed to the course.
- }
- }
- if (!empty($session_id)) {
- // Check whether the user has not already been stored in the session_rel_course_user table
- if (Database::num_rows(@Database::query("SELECT * FROM ".Database::get_main_table(TABLE_MAIN_SESSION_COURSE_USER)."
- WHERE course_code = '".$_SESSION['_course']['id']."'
- AND id_session ='".$session_id."'
- AND id_user = '".$user_id."'")) > 0) {
- return false;
- }
- // check if the user is registered in the session with other course
- $sql = "SELECT id_user FROM ".Database::get_main_table(TABLE_MAIN_SESSION_COURSE_USER)." WHERE id_session='".$session_id."' AND id_user='$user_id'";
- $rs = Database::query($sql);
- if (Database::num_rows($rs) == 0) {
- // Check whether the user has not already been stored in the session_rel_user table
- if (Database::num_rows(@Database::query("SELECT * FROM ".Database::get_main_table(TABLE_MAIN_SESSION_USER)."
- WHERE id_session ='".$session_id."'
- AND id_user = '".$user_id."' AND relation_type<>".SESSION_RELATION_TYPE_RRHH." ")) > 0) {
- return false;
- }
- }
- // Add him/her in the table session_rel_course_rel_user
- @Database::query("INSERT INTO ".Database::get_main_table(TABLE_MAIN_SESSION_COURSE_USER)."
- SET id_session ='".$session_id."',
- course_code = '".$_SESSION['_course']['id']."',
- id_user = '".$user_id."'");
- // Add him/her in the table session_rel_user
- @Database::query("INSERT INTO ".Database::get_main_table(TABLE_MAIN_SESSION_USER)."
- SET id_session ='".$session_id."',
- id_user = '".$user_id."'");
- // Update the table session
- $row = Database::fetch_array(@Database::query("SELECT COUNT(*) FROM ".Database::get_main_table(TABLE_MAIN_SESSION_USER)." WHERE id_session = '".$session_id."' AND relation_type<>".SESSION_RELATION_TYPE_RRHH.""));
- $count = $row[0]; // number of users by session
- $result = @Database::query("UPDATE ".Database::get_main_table(TABLE_MAIN_SESSION)." SET nbr_users = '$count' WHERE id = '".$session_id."'");
- // Update the table session_rel_course
- $row = Database::fetch_array(@Database::query("SELECT COUNT(*) FROM ".Database::get_main_table(TABLE_MAIN_SESSION_COURSE_USER)." WHERE id_session = '".$session_id."' AND course_code = '$course_code' AND status<>2" ));
- $count = $row[0]; // number of users by session
- $result = @Database::query("UPDATE ".Database::get_main_table(TABLE_MAIN_SESSION_COURSE)." SET nbr_users = '$count' WHERE id_session = '".$session_id."' AND course_code = '$course_code' ");
- } else {
- $course_sort = self::userCourseSort($user_id, $course_code);
- $result = @Database::query("INSERT INTO ".Database::get_main_table(TABLE_MAIN_COURSE_USER)."
- SET course_code = '$course_code',
- user_id = '$user_id',
- status = '".$status."',
- sort = '". ($course_sort)."'");
- // Add event to the system log
- $user_id = api_get_user_id();
- event_system(LOG_SUBSCRIBE_USER_TO_COURSE, LOG_COURSE_CODE, $course_code, api_get_utc_datetime(), $user_id);
- }
- return (bool)$result;
- }
- /**
- * Get the course id based on the original id and field name in the extra fields. Returns 0 if course was not found
- *
- * @param string Original course id
- * @param string Original field name
- * @return int Course id
- */
- public static function get_course_code_from_original_id($original_course_id_value, $original_course_id_name) {
- $t_cfv = Database::get_main_table(TABLE_MAIN_COURSE_FIELD_VALUES);
- $table_field = Database::get_main_table(TABLE_MAIN_COURSE_FIELD);
- $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'";
- $res = Database::query($sql_course);
- $row = Database::fetch_object($res);
- if ($row) {
- return $row->course_code;
- } else {
- return 0;
- }
- }
- /**
- * Gets the course code from the course id. Returns null if course id was not found
- *
- * @param int Course id
- * @return string Course code
- */
- public static function get_course_code_from_course_id($id) {
- $table = Database::get_main_table(TABLE_MAIN_COURSE);
- $id = intval($id);
- $sql = "SELECT code FROM $table WHERE id = '$id' ";
- $res = Database::query($sql);
- $row = Database::fetch_object($res);
- if ($row) {
- return $row->code;
- } else {
- return null;
- }
- }
- /**
- * Subscribe a user $user_id to a course $course_code.
- * @author Hugues Peeters
- * @author Roan Embrechts
- *
- * @param int $user_id the id of the user
- * @param string $course_code the course code
- * @param string $status (optional) The user's status in the course
- *
- * @return boolean true if subscription succeeds, boolean false otherwise.
- */
- public static function add_user_to_course($user_id, $course_code, $status = STUDENT) {
- $user_table = Database::get_main_table(TABLE_MAIN_USER);
- $course_table = Database::get_main_table(TABLE_MAIN_COURSE);
- $course_user_table = Database::get_main_table(TABLE_MAIN_COURSE_USER);
- $status = ($status == STUDENT || $status == COURSEMANAGER) ? $status : STUDENT;
- if (empty($user_id) || empty($course_code) || ($user_id != strval(intval($user_id)))) {
- return false;
- }
- $course_code = Database::escape_string($course_code);
- // Check in advance whether the user has already been registered on the platform.
- if (Database::num_rows(Database::query("SELECT status FROM ".$user_table." WHERE user_id = '$user_id' ")) == 0) {
- return false; // Thehe user has not been registered to the platform.
- }
- // Check whether the user has already been subscribed to this course.
- 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 = '$course_code'")) > 0) {
- return false; // The user has been subscribed to the course.
- }
- // Check in advance whether subscription is allowed or not for this course.
- if (Database::num_rows(Database::query("SELECT code, visibility FROM ".$course_table." WHERE code = '$course_code' AND subscribe = '".SUBSCRIBE_NOT_ALLOWED."'")) > 0) {
- return false; // Subscription is not allowed for this course.
- }
- // Ok, subscribe the user.
- $max_sort = api_max_sort_value('0', $user_id);
- return (bool)Database::query("INSERT INTO ".$course_user_table."
- SET course_code = '$course_code',
- user_id = '$user_id',
- status = '".$status."',
- sort = '". ($max_sort + 1)."'");
- }
- /**
- * Checks wether a parameter exists.
- * If it doesn't, the function displays an error message.
- *
- * @return true if parameter is set and not empty, false otherwise
- * @todo move function to better place, main_api ?
- */
- public static function check_parameter($parameter, $error_message) {
- if (empty($parameter)) {
- Display::display_normal_message($error_message);
- return false;
- }
- return true;
- }
- /**
- * Lets the script die when a parameter check fails.
- * @todo move function to better place, main_api ?
- */
- public static function check_parameter_or_fail($parameter, $error_message) {
- if (!self::check_parameter($parameter, $error_message)) {
- die();
- }
- }
- /**
- * @return true if there already are one or more courses
- * with the same code OR visual_code (visualcode), false otherwise
- */
- public static function course_code_exists($wanted_course_code) {
- $wanted_course_code = Database::escape_string($wanted_course_code);
- $result = Database::fetch_array(Database::query("SELECT COUNT(*) as number FROM ".Database::get_main_table(TABLE_MAIN_COURSE)."WHERE code = '$wanted_course_code' OR visual_code = '$wanted_course_code'"));
- return $result['number'] > 0;
- }
- /**
- * @return an array with the course info of all real courses on the platform
- */
- public static function get_real_course_list() {
- $sql_result = Database::query("SELECT * FROM ".Database::get_main_table(TABLE_MAIN_COURSE)." WHERE target_course_code IS NULL");
- $real_course_list = array();
- while ($result = Database::fetch_array($sql_result)) {
- $real_course_list[$result['code']] = $result;
- }
- return $real_course_list;
- }
- /**
- * Lists all virtual courses
- * @return array Course info (course code => details) of all virtual courses on the platform
- */
- public static function get_virtual_course_list() {
- $sql_result = Database::query("SELECT * FROM ".Database::get_main_table(TABLE_MAIN_COURSE)." WHERE target_course_code IS NOT NULL");
- $virtual_course_list = array();
- while ($result = Database::fetch_array($sql_result)) {
- $virtual_course_list[$result['code']] = $result;
- }
- return $virtual_course_list;
- }
- /**
- * Returns an array with the course info of the real courses of which
- * the current user is course admin
- * @return array A list of courses details for courses to which the user is subscribed as course admin (status = 1)
- */
- public static function get_real_course_list_of_user_as_course_admin($user_id) {
- $result_array = array();
- if ($user_id != strval(intval($user_id))) {
- return $result_array;
- }
- $sql_result = Database::query("SELECT *
- FROM ".Database::get_main_table(TABLE_MAIN_COURSE)." course
- LEFT JOIN ".Database::get_main_table(TABLE_MAIN_COURSE_USER)." course_user
- ON course.code = course_user.course_code
- WHERE course.target_course_code IS NULL
- AND course_user.user_id = '$user_id'
- AND course_user.status = '1'");
- if ($sql_result === false) { return $result_array; }
- while ($result = Database::fetch_array($sql_result)) {
- $result_array[] = $result;
- }
- return $result_array;
- }
-
- /**
- * Get course list as coach
- *
- * @param int user id
- * @return array course list
- *
- * */
- public static function get_course_list_as_coach($user_id, $include_courses_in_sessions = false) {
-
- //1. Getting courses as teacher (No session)
- $courses_temp = CourseManager::get_course_list_of_user_as_course_admin($user_id);
- $courses_as_admin = array();
-
- if (!empty($courses_temp)) {
- foreach($courses_temp as $course_item) {
- $courses_as_admin[0][$course_item['course_code']] = $course_item['course_code'];
- }
- }
-
- //2. Include courses in sessions
- if ($include_courses_in_sessions) {
- $sessions = Tracking::get_sessions_coached_by_user($user_id);
-
- if (!empty($sessions)) {
- foreach($sessions as $session_item) {
- $courses = Tracking :: get_courses_followed_by_coach($user_id, $session_item['id']);
- foreach($courses as $course_item) {
- $courses_as_admin[$session_item['id']][$course_item] = $course_item;
- }
- }
- }
- }
- return $courses_as_admin;
- }
-
- public static function get_user_list_from_courses_as_coach($user_id, $include_sessions = true) {
- $courses_as_admin = $students_in_courses = array();
-
- $sessions = CourseManager::get_course_list_as_coach($user_id, true);
-
- if (!empty($sessions)) {
- foreach($sessions as $session_id => $courses) {
- if (!$include_sessions) {
- if (!empty($session_id)) {
- continue;
- }
- }
- if (empty($session_id)) {
- foreach($courses as $course_code) {
- $students_in_course = CourseManager::get_user_list_from_course_code($course_code);
-
- foreach($students_in_course as $user_item) {
- //Only students
- if ($user_item['status_rel'] == STUDENT)
- $students_in_courses[$user_item['user_id']] = $user_item['user_id'];
- }
- }
- } else {
- $students_in_course = SessionManager::get_users_by_session($session_id, '0');
-
- foreach($students_in_course as $user_item) {
- $students_in_courses[$user_item['user_id']] = $user_item['user_id'];
- }
- }
- }
- }
-
- $students = Tracking :: get_student_followed_by_coach($user_id);
- if (!empty($students_in_courses)) {
- if (!empty($students)) {
- $students = array_merge($students, $students_in_courses);
- } else {
- $students = $students_in_courses;
- }
- }
-
- if (!empty($students)) {
- $students = array_unique($students);
- }
- return $students;
- }
-
-
-
-
- /**
- * @return an array with the course info of all the courses (real and virtual) of which
- * the current user is course admin
- */
- public static function get_course_list_of_user_as_course_admin($user_id) {
- if ($user_id != strval(intval($user_id))) {
- return array();
- }
- // Definitions database tables and variables
- $tbl_course = Database::get_main_table(TABLE_MAIN_COURSE);
- $tbl_course_user = Database::get_main_table(TABLE_MAIN_COURSE_USER);
- $user_id = intval($user_id);
- $data = array();
- $sql_nb_cours = "SELECT course_rel_user.course_code, course.title, course.id, course.db_name, course.id as real_id
- FROM $tbl_course_user as course_rel_user
- INNER JOIN $tbl_course as course
- ON course.code = course_rel_user.course_code
- WHERE course_rel_user.user_id='$user_id' AND course_rel_user.status='1'
- ORDER BY course.title";
- if (api_get_multiple_access_url()) {
- $tbl_course_rel_access_url = Database::get_main_table(TABLE_MAIN_ACCESS_URL_REL_COURSE);
- $access_url_id = api_get_current_access_url_id();
- if ($access_url_id != -1) {
- $sql_nb_cours = " SELECT course_rel_user.course_code, course.title, course.id, course.db_name, course.id as real_id
- FROM $tbl_course_user as course_rel_user
- INNER JOIN $tbl_course as course
- ON course.code = course_rel_user.course_code
- INNER JOIN $tbl_course_rel_access_url course_rel_url
- ON (course_rel_url.course_code= course.code)
- WHERE access_url_id = $access_url_id AND course_rel_user.user_id='$user_id' AND course_rel_user.status='1'
- ORDER BY course.title";
- }
- }
- $result_nb_cours = Database::query($sql_nb_cours);
- if (Database::num_rows($result_nb_cours) > 0) {
- while ($row = Database::fetch_array($result_nb_cours,'ASSOC')) {
- $data[$row['course_code']] = $row;
- }
- }
- return $data;
- }
- /**
- * Find out for which courses the user is registered and determine a visual course code and course title from that.
- * Takes virtual courses into account
- *
- * Default case: the name and code stay what they are.
- *
- * Scenarios:
- * - User is registered in real course and virtual courses; name / code become a mix of all
- * - User is registered in real course only: name stays that of real course
- * - User is registered in virtual course only: name becomes that of virtual course
- * - user is not registered to any of the real/virtual courses: name stays that of real course
- * (I'm not sure about the last case, but this seems not too bad)
- *
- * @author Roan Embrechts
- * @param $user_id, the id of the user
- * @param $course_info, an array with course info that you get using Database::get_course_info($course_system_code);
- * @return an array with indices
- * $return_result['title'] - the course title of the combined courses
- * $return_result['code'] - the course code of the combined courses
- */
- public static function determine_course_title_from_course_info($user_id, $course_info) {
- if ($user_id != strval(intval($user_id))) {
- return array();
- }
- $real_course_id = $course_info['system_code'];
- $real_course_info = Database::get_course_info($real_course_id);
- $real_course_name = $real_course_info['title'];
- $real_course_visual_code = $real_course_info['visual_code'];
- $real_course_real_code = Database::escape_string($course_info['system_code']);
- //is the user registered in the real course?
- $result = Database::fetch_array(Database::query("SELECT * FROM ".Database::get_main_table(TABLE_MAIN_COURSE_USER)."
- WHERE user_id = '$user_id' AND relation_type<>".COURSE_RELATION_TYPE_RRHH." AND course_code = '$real_course_real_code'"));
- $user_is_registered_in_real_course = !empty($result);
- //get a list of virtual courses linked to the current real course and to which the current user is subscribed
- $user_subscribed_virtual_course_list = self::get_list_of_virtual_courses_for_specific_user_and_real_course($user_id, $real_course_id);
- $virtual_courses_exist = count($user_subscribed_virtual_course_list) > 0;
- //now determine course code and name
- if ($user_is_registered_in_real_course && $virtual_courses_exist) {
- $course_info['name'] = self::create_combined_name($user_is_registered_in_real_course, $real_course_name, $user_subscribed_virtual_course_list);
- $course_info['official_code'] = self::create_combined_code($user_is_registered_in_real_course, $real_course_visual_code, $user_subscribed_virtual_course_list);
- }
- elseif ($user_is_registered_in_real_course) {
- //course name remains real course name
- $course_info['name'] = $real_course_name;
- $course_info['official_code'] = $real_course_visual_code;
- }
- elseif ($virtual_courses_exist) {
- $course_info['name'] = self::create_combined_name($user_is_registered_in_real_course, $real_course_name, $user_subscribed_virtual_course_list);
- $course_info['official_code'] = self::create_combined_code($user_is_registered_in_real_course, $real_course_visual_code, $user_subscribed_virtual_course_list);
- } else {
- //course name remains real course name
- $course_info['name'] = $real_course_name;
- $course_info['official_code'] = $real_course_visual_code;
- }
- $return_result['title'] = $course_info['name'];
- $return_result['code'] = $course_info['official_code'];
- return $return_result;
- }
- /**
- * Create a course title based on all real and virtual courses the user is registered in.
- * @param boolean $user_is_registered_in_real_course
- * @param string $real_course_name, the title of the real course
- * @param array $virtual_course_list, the list of virtual courses
- */
- public static function create_combined_name($user_is_registered_in_real_course, $real_course_name, $virtual_course_list) {
- $complete_course_name = array();
- if ($user_is_registered_in_real_course) {
- // Add the real name to the result.
- $complete_course_name[] = $real_course_name;
- }
- // Add course titles of all virtual courses.
- foreach ($virtual_course_list as $current_course) {
- $complete_course_name[] = $current_course['title'];
- }
- // 'CombinedCourse' is from course_home language file.
- return (($user_is_registered_in_real_course || count($virtual_course_list) > 1) ? get_lang('CombinedCourse').' ' : '').implode(' & ', $complete_course_name);
- }
- /**
- * Create a course code based on all real and virtual courses the user is registered in.
- */
- public static function create_combined_code($user_is_registered_in_real_course, $real_course_code, $virtual_course_list) {
- $complete_course_code = array();
- if ($user_is_registered_in_real_course) {
- // Add the real code to the result
- $complete_course_code[] = $real_course_code;
- }
- // Add codes of all virtual courses.
- foreach ($virtual_course_list as $current_course) {
- $complete_course_code[] = $current_course['visual_code'];
- }
- return implode(' & ', $complete_course_code);
- }
- /**
- * Return course info array of virtual course
- *
- * Note this is different from getting information about a real course!
- *
- * @param $real_course_code, the id of the real course which the virtual course is linked to
- */
- public static function get_virtual_course_info($real_course_code) {
- $sql_result = Database::query("SELECT * FROM ".Database::get_main_table(TABLE_MAIN_COURSE)."
- WHERE target_course_code = '".Database::escape_string($real_course_code)."'");
- $result = array();
- while ($virtual_course = Database::fetch_array($sql_result)) {
- $result[] = $virtual_course;
- }
- return $result;
- }
- /**
- * @param string $system_code, the system code of the course
- * @return true if the course is a virtual course, false otherwise
- */
- public static function is_virtual_course_from_system_code($system_code) {
- $result = Database::fetch_array(Database::query("SELECT target_course_code FROM ".Database::get_main_table(TABLE_MAIN_COURSE)."
- WHERE code = '".Database::escape_string($system_code)."'"));
- return !empty($result['target_course_code']);
- }
- /**
- * Returns whether the course code given is a visual code
- * @param string Visual course code
- * @return true if the course is a virtual course, false otherwise
- */
- public static function is_virtual_course_from_visual_code($visual_code) {
- $result = Database::fetch_array(Database::query("SELECT target_course_code FROM ".Database::get_main_table(TABLE_MAIN_COURSE)."
- WHERE visual_code = '".Database::escape_string($visual_code)."'"));
- return !empty($result['target_course_code']);
- }
- /**
- * @return true if the real course has virtual courses that the user is subscribed to, false otherwise
- */
- public static function has_virtual_courses_from_code($real_course_code, $user_id) {
- return count(self::get_list_of_virtual_courses_for_specific_user_and_real_course($user_id, $real_course_code)) > 0;
- }
- /**
- * Return an array of arrays, listing course info of all virtual course
- * linked to the real course ID $real_course_code
- *
- * @param string The id of the real course which the virtual courses are linked to
- * @return array List of courses details
- */
- public static function get_virtual_courses_linked_to_real_course($real_course_code) {
- $sql_result = Database::query("SELECT * FROM ".Database::get_main_table(TABLE_MAIN_COURSE)."
- WHERE target_course_code = '".Database::get_main_table(TABLE_MAIN_COURSE)."'");
- $result_array = array();
- while ($result = Database::fetch_array($sql_result)) {
- $result_array[] = $result;
- }
- return $result_array;
- }
- /**
- * This function returns the course code of the real course
- * to which a virtual course is linked.
- *
- * @param the course code of the virtual course
- * @return the course code of the real course
- */
- public static function get_target_of_linked_course($virtual_course_code) {
- //get info about the virtual course
- $result = Database::fetch_array(Database::query("SELECT * FROM ".Database::get_main_table(TABLE_MAIN_COURSE)."
- WHERE code = '".Database::escape_string($virtual_course_code)."'"));
- return $result['target_course_code'];
- }
- /*
- USER FUNCTIONS
- */
- /**
- * Check if user is subscribed inside a course
- * @param int User id
- * @param string Course code, if this parameter is null, it'll check for all courses
- * @param bool True for checking inside sessions too, by default is not checked
- * @return bool true if the user is registered in the course, false otherwise
- */
- public static function is_user_subscribed_in_course($user_id, $course_code = null, $in_a_session = false, $session_id = null) {
- $user_id = intval($user_id);
-
- if (empty($session_id)) {
- $session_id = api_get_session_id();
- } else {
- $session_id = intval($session_id);
- }
- $condition_course = '';
- if (isset($course_code)) {
- $course_code = Database::escape_string($course_code);
- $condition_course = ' AND course_code = "'.$course_code.'" ';
- }
- $result = Database::fetch_array(Database::query("SELECT * FROM ".Database::get_main_table(TABLE_MAIN_COURSE_USER)."
- WHERE user_id = $user_id AND relation_type<>".COURSE_RELATION_TYPE_RRHH." $condition_course "));
-
- if (!empty($result)) {
- return true; // The user has been registered in this course.
- }
-
- if (!$in_a_session) {
- return false; // The user has not been registered in this course.
- }
- if (Database::num_rows(Database::query('SELECT 1 FROM '.Database::get_main_table(TABLE_MAIN_SESSION_COURSE_USER).
- ' WHERE id_user = '.$user_id.' '.$condition_course.' ')) > 0) {
- return true;
- }
- if (Database::num_rows(Database::query('SELECT 1 FROM '.Database::get_main_table(TABLE_MAIN_SESSION_COURSE_USER).
- ' WHERE id_user = '.$user_id.' AND status=2 '.$condition_course.' ')) > 0) {
- return true;
- }
- if (Database::num_rows(Database::query('SELECT 1 FROM '.Database::get_main_table(TABLE_MAIN_SESSION).
- ' WHERE id='.$session_id.' AND id_coach='.$user_id)) > 0) {
- return true;
- }
- return false;
- }
- /**
- * Is the user a teacher in the given course?
- *
- * @param $user_id, the id (int) of the user
- * @param $course_code, the course code
- *
- * @return true if the user is a teacher in the course, false otherwise
- */
- public static function is_course_teacher($user_id, $course_code) {
- if ($user_id != strval(intval($user_id))) {
- return false;
- }
- $sql_result = Database::query('SELECT status FROM '.Database::get_main_table(TABLE_MAIN_COURSE_USER).
- ' WHERE course_code="'.Database::escape_string($course_code).'" and user_id="'.$user_id.'"');
- if (Database::num_rows($sql_result) > 0) {
- return Database::result($sql_result, 0, 'status') == 1;
- }
- return false;
- }
- /**
- * Is the user subscribed in the real course or linked courses?
- *
- * @param int the id of the user
- * @param array info about the course (comes from course table, see database lib)
- *
- * @return true if the user is registered in the real course or linked courses, false otherwise
- */
- public static function is_user_subscribed_in_real_or_linked_course ($user_id, $course_code, $session_id = '') {
- if ($user_id != strval(intval($user_id))) {
- return false;
- }
- $course_code = Database::escape_string($course_code);
- if ($session_id == '') {
- $result = Database::fetch_array(Database::query("SELECT *
- FROM ".Database::get_main_table(TABLE_MAIN_COURSE)." course
- LEFT JOIN ".Database::get_main_table(TABLE_MAIN_COURSE_USER)." course_user
- ON course.code = course_user.course_code
- WHERE course_user.user_id = '$user_id' AND course_user.relation_type<>".COURSE_RELATION_TYPE_RRHH." AND ( course.code = '$course_code' OR target_course_code = '$course_code')"));
- return !empty($result);
- }
- // From here we trust session id.
- // Is he/she subscribed to the session's course?
- // A user?
- if (Database::num_rows(Database::query("SELECT id_user
- FROM ".Database::get_main_table(TABLE_MAIN_SESSION_COURSE_USER)."
- WHERE id_session='".$_SESSION['id_session']."'
- AND id_user='$user_id'"))) {
- return true;
- }
- // A course coach?
- if (Database::num_rows(Database::query("SELECT id_user
- FROM ".Database::get_main_table(TABLE_MAIN_SESSION_COURSE_USER)."
- WHERE id_session='".$_SESSION['id_session']."'
- AND id_user = '$user_id' AND status = 2
- AND course_code='$course_code'"))) {
- return true;
- }
- // A session coach?
- if (Database::num_rows(Database::query("SELECT id_coach
- FROM ".Database::get_main_table(TABLE_MAIN_SESSION)." AS session
- WHERE session.id='".$_SESSION['id_session']."'
- AND id_coach='$user_id'"))) {
- return true;
- }
- return false;
- }
- /**
- * Return user info array of all users registered in the specified real or virtual course
- * This only returns the users that are registered in this actual course, not linked courses.
- *
- * @param string $course_code the code of the course
- * @param boolean $with_session determines if the course is used in a session or not
- * @param integer $session_id the id of the session
- * @param string $limit the LIMIT statement of the sql statement
- * @param string $order_by the field to order the users by. Valid values are 'lastname', 'firstname', 'username', 'email', 'official_code' OR a part of a SQL statement that starts with ORDER BY ...
- * @return array
- */
- public static function get_user_list_from_course_code($course_code, $session_id = 0, $limit = '', $order_by = '') {
- // variable initialisation
- $session_id = intval($session_id);
- $course_code = Database::escape_string($course_code);
- $where = array();
- // if the $order_by does not contain 'ORDER BY' we have to check if it is a valid field that can be sorted on
- if (!strstr($order_by,'ORDER BY')) {
- if (!empty($order_by) AND in_array($order_by, array('lastname', 'firstname', 'username', 'email', 'official_code'))){
- $order_by = 'ORDER BY user.'.$order_by;
- } else {
- $order_by = '';
- }
- }
- $sql = $session_id == 0
- ? 'SELECT DISTINCT course_rel_user.status as status_rel, user.user_id, course_rel_user.role, course_rel_user.tutor_id, user.* '
- : 'SELECT DISTINCT user.user_id, session_course_user.status as status_session, user.* ';
- $sql .= ' FROM '.Database::get_main_table(TABLE_MAIN_USER).' as user ';
- if (!empty($session_id)) {
- $sql .= ' LEFT JOIN '.Database::get_main_table(TABLE_MAIN_SESSION_COURSE_USER).' as session_course_user
- ON user.user_id = session_course_user.id_user
- AND session_course_user.course_code="'.$course_code.'"
- AND session_course_user.id_session = '.$session_id;
- $where[] = ' session_course_user.course_code IS NOT NULL ';
- } else {
- $sql .= ' LEFT JOIN '.Database::get_main_table(TABLE_MAIN_COURSE_USER).' as course_rel_user
- ON user.user_id = course_rel_user.user_id AND course_rel_user.relation_type<>'.COURSE_RELATION_TYPE_RRHH.'
- AND course_rel_user.course_code="'.$course_code.'"';
- $where[] = ' course_rel_user.course_code IS NOT NULL ';
- }
- $multiple_access_url = api_get_multiple_access_url();
- if ($multiple_access_url) {
- $sql .= ' LEFT JOIN '.Database::get_main_table(TABLE_MAIN_ACCESS_URL_REL_USER).' au ON (au.user_id = user.user_id) ';
- }
- $sql .= ' WHERE '.implode(' OR ', $where);
- if ($multiple_access_url) {
- $current_access_url_id = api_get_current_access_url_id();
- $sql .= " AND (access_url_id = $current_access_url_id ) ";
- }
- $sql .= ' '.$order_by.' '.$limit;
-
- $rs = Database::query($sql);
- $users = array();
-
- if (Database::num_rows($rs)) {
- while ($user = Database::fetch_array($rs)) {
- //$user_info = Database::get_user_info_from_id($user['user_id']);
- $user_info = $user;
- $user_info['status'] = $user['status'];
-
- if (isset($user['role'])) {
- $user_info['role'] = $user['role'];
- }
- if (isset($user['tutor_id'])) {
- $user_info['tutor_id'] = $user['tutor_id'];
- }
-
- if (!empty($session_id)) {
- $user_info['status_session'] = $user['status_session'];
- }
-
- $users[$user['user_id']] = $user_info;
- }
- }
- return $users;
- }
-
- /**
- * Gets subscribed users in a course or in a course/session
- *
- * @param string $course_code
- * @param int $session_id
- * @return int
- */
- public static function get_users_count_in_course($course_code, $session_id = 0) {
- // variable initialisation
- $session_id = intval($session_id);
- $course_code = Database::escape_string($course_code);
- $sql .= 'SELECT DISTINCT count(*) as count FROM '.Database::get_main_table(TABLE_MAIN_USER).' as user ';
- $where = array();
- if (!empty($session_id)) {
- $sql .= ' LEFT JOIN '.Database::get_main_table(TABLE_MAIN_SESSION_COURSE_USER).' as session_course_user
- ON user.user_id = session_course_user.id_user
- AND session_course_user.course_code = "'.$course_code.'"
- AND session_course_user.id_session = '.$session_id;
-
- $where[] = ' session_course_user.course_code IS NOT NULL ';
- } else {
- $sql .= ' LEFT JOIN '.Database::get_main_table(TABLE_MAIN_COURSE_USER).' as course_rel_user
- ON user.user_id = course_rel_user.user_id AND course_rel_user.relation_type<>'.COURSE_RELATION_TYPE_RRHH.'
- AND course_rel_user.course_code="'.$course_code.'"';
- $where[] = ' course_rel_user.course_code IS NOT NULL ';
- }
-
- $multiple_access_url = api_get_multiple_access_url();
- if ($multiple_access_url) {
- $sql .= ' LEFT JOIN '.Database::get_main_table(TABLE_MAIN_ACCESS_URL_REL_USER).' au ON (au.user_id = user.user_id) ';
- }
- $sql .= ' WHERE '.implode(' OR ', $where);
- if ($multiple_access_url) {
- $current_access_url_id = api_get_current_access_url_id();
- $sql .= " AND (access_url_id = $current_access_url_id ) ";
- }
- $rs = Database::query($sql);
- $users = array();
- $count = 0;
- if (Database::num_rows($rs)) {
- $user = Database::fetch_array($rs);
- $count = $user['count'];
- }
- return $count;
- }
- /**
- * Get a list of coaches of a course and a session
- * @param string Course code
- * @param int Session ID
- * @return array List of users
- */
- public static function get_coach_list_from_course_code($course_code, $session_id) {
- if ($session_id != strval(intval($session_id))) {
- return array();
- }
- $course_code = Database::escape_string($course_code);
- $users = array();
- // We get the coach for the given course in a given session.
- $rs = Database::query('SELECT id_user FROM '.Database::get_main_table(TABLE_MAIN_SESSION_COURSE_USER).
- ' WHERE id_session="'.$session_id.'" AND course_code="'.$course_code.'" AND status = 2');
- while ($user = Database::fetch_array($rs)) {
- $user_info = Database::get_user_info_from_id($user['id_user']);
- $user_info['status'] = $user['status'];
- $user_info['role'] = $user['role'];
- $user_info['tutor_id'] = $user['tutor_id'];
- $user_info['email'] = $user['email'];
- $users[$user['id_user']] = $user_info;
- }
- // We get the session coach.
- $rs = Database::query('SELECT id_coach FROM '.Database::get_main_table(TABLE_MAIN_SESSION).
- ' WHERE id="'.$session_id.'"');
- $user_info = array();
- $session_id_coach = Database::result($rs, 0, 'id_coach');
- $user_info = Database::get_user_info_from_id($session_id_coach);
- $user_info['status'] = $user['status'];
- $user_info['role'] = $user['role'];
- $user_info['tutor_id'] = $user['tutor_id'];
- $user_info['email'] = $user['email'];
- $users[$session_id_coach] = $user_info;
- return $users;
- }
- /**
- * Return user info array of all users registered in the specified real or virtual course
- * This only returns the users that are registered in this actual course, not linked courses.
- *
- * @param string $course_code
- * @param boolean $full list to true if we want sessions students too
- * @return array with user id
- */
- public static function get_student_list_from_course_code($course_code, $with_session = false, $session_id = 0) {
- $session_id = intval($session_id);
- $course_code = Database::escape_string($course_code);
- $students = array();
- if ($session_id == 0) {
- // students directly subscribed to the course
- $rs = Database::query("SELECT * FROM ".Database::get_main_table(TABLE_MAIN_COURSE_USER)."
- WHERE course_code = '$course_code' AND status = 5");
- while ($student = Database::fetch_array($rs)) {
- $students[$student['user_id']] = $student;
- }
- }
- // students subscribed to the course through a session
- if (api_get_setting('use_session_mode') == 'true' && $with_session) {
- $sql_query = "SELECT * FROM ".Database::get_main_table(TABLE_MAIN_SESSION_COURSE_USER)." WHERE course_code = '$course_code' AND status<>2";
- if ($session_id != 0) {
- $sql_query .= ' AND id_session = '.$session_id;
- }
- $rs = Database::query($sql_query);
- while($student = Database::fetch_array($rs)) {
- $students[$student['id_user']] = $student;
- }
- }
- return $students;
- }
- /**
- * Return user info array of all teacher-users registered in the specified real or virtual course
- * This only returns the users that are registered in this actual course, not linked courses.
- *
- * @param string $course_code
- * @return array with user id
- */
- public static function get_teacher_list_from_course_code($course_code) {
- $course_code = Database::escape_string($course_code);
- // teachers directly subscribed to the course
- $teachers = array();
- // TODO: This query is not optimal.
- $rs = Database::query("SELECT u.user_id, u.lastname, u.firstname, u.email, u.username, u.status " .
- "FROM ".Database::get_main_table(TABLE_MAIN_COURSE_USER)." cu, ".Database::get_main_table(TABLE_MAIN_USER)." u ".
- "WHERE cu.course_code = '$course_code' " .
- "AND cu.status = 1 " .
- "AND cu.user_id = u.user_id");
- while ($teacher = Database::fetch_array($rs)) {
- $teachers[$teacher['user_id']] = $teacher;
- }
- return $teachers;
- }
-
- public static function get_teacher_list_from_course_code_to_string($course_code) {
- $teacher_list = self::get_teacher_list_from_course_code($course_code);
- $teacher_string = '';
- $list = array();
- if (!empty($teacher_list)) {
- foreach($teacher_list as $teacher) {
- $list[]= api_get_person_name($teacher['firstname'], $teacher['lastname']);
- }
- if (!empty($list)) {
- $teacher_string = implode (', ', $list);
- }
- }
- return $teacher_string;
- }
- /**
- * Return user info array of all users registered in the specified course
- * this includes the users of the course itsel and the users of all linked courses.
- *
- * @param array $course_info
- * @return array with user info
- */
- public static function get_real_and_linked_user_list($course_code, $with_sessions = true, $session_id = 0) {
- //get list of virtual courses
- $virtual_course_list = self::get_virtual_courses_linked_to_real_course($course_code);
- //get users from real course
- $user_list = self::get_user_list_from_course_code($course_code, $session_id);
- foreach ($user_list as $this_user) {
- $complete_user_list[] = $this_user;
- }
- //get users from linked courses
- foreach ($virtual_course_list as $this_course) {
- $course_code = $this_course['code'];
- $user_list = self::get_user_list_from_course_code($course_code, $session_id);
- foreach ($user_list as $this_user) {
- $complete_user_list[] = $this_user;
- }
- }
- return $complete_user_list;
- }
- /**
- * Return an array of arrays, listing course info of all courses in the list
- * linked to the real course $real_course_code, to which the user $user_id is subscribed.
- *
- * @param $user_id, the id (int) of the user
- * @param $real_course_code, the id (char) of the real course
- *
- * @return array of course info arrays
- */
- public static function get_list_of_virtual_courses_for_specific_user_and_real_course($user_id, $course_code) {
- $result_array = array();
- if ($user_id != strval(intval($user_id))) {
- return $result_array;
- }
- $course_code = Database::escape_string($course_code);
- $sql = "SELECT *
- FROM ".Database::get_main_table(TABLE_MAIN_COURSE)." course
- LEFT JOIN ".Database::get_main_table(TABLE_MAIN_COURSE_USER)." course_user
- ON course.code = course_user.course_code
- WHERE course.target_course_code = '$course_code' AND course_user.user_id = '$user_id' AND course_user.relation_type<>".COURSE_RELATION_TYPE_RRHH." ";
- $sql_result = Database::query($sql);
- while ($result = Database::fetch_array($sql_result)) {
- $result_array[] = $result;
- }
- return $result_array;
- }
- /*
- GROUP FUNCTIONS
- */
- /**
- * Get the list of groups from the course
- * @param string Course code
- * @param int Session ID (optional)
- * @return array List of groups info
- */
- public static function get_group_list_of_course($course_code, $session_id = 0) {
- $course_info = Database::get_course_info($course_code);
- $course_id = $course_info['real_id'];
- $group_list = array();
- $session_id != 0 ? $session_condition = ' WHERE g.session_id IN(1,'.intval($session_id).')' : $session_condition = ' WHERE g.session_id = 0';
- $sql = "SELECT g.id, g.name, COUNT(gu.id) userNb
- FROM ".Database::get_course_table(TABLE_GROUP)." AS g
- LEFT JOIN ".Database::get_course_table(TABLE_GROUP_USER)." gu
- ON g.id = gu.group_id
- $session_condition AND
- g.c_id = $course_id
- GROUP BY g.id
- ORDER BY g.name";
- $result = Database::query($sql);
- while ($group_data = Database::fetch_array($result)) {
- $group_list[$group_data['id']] = $group_data;
- }
- return $group_list;
- }
- /**
- * Checks all parameters needed to create a virtual course.
- * If they are all set, the virtual course creation procedure is called.
- *
- * Call this function instead of create_virtual_course
- * @param string Course code
- * @param string Course title
- * @param string Wanted course code
- * @param string Course language
- * @param string Course category
- * @return bool True on success, false on error
- */
- public static function attempt_create_virtual_course($real_course_code, $course_title, $wanted_course_code, $course_language, $course_category) {
- //better: create parameter list, check the entire list, when false display errormessage
- self::check_parameter_or_fail($real_course_code, 'Unspecified parameter: real course id.');
- self::check_parameter_or_fail($course_title, 'Unspecified parameter: course title.');
- self::check_parameter_or_fail($wanted_course_code, 'Unspecified parameter: wanted course code.');
- self::check_parameter_or_fail($course_language, 'Unspecified parameter: course language.');
- self::check_parameter_or_fail($course_category, 'Unspecified parameter: course category.');
- return self::create_virtual_course($real_course_code, $course_title, $wanted_course_code, $course_language, $course_category);
- }
- /**
- * This function creates a virtual course.
- * It assumes all parameters have been checked and are not empty.
- * It checks wether a course with the $wanted_course_code already exists.
- *
- * Users of this library should consider this function private,
- * please call attempt_create_virtual_course instead of this one.
- *
- * note: The virtual course 'owner' id (the first course admin) is set to the CURRENT user id.
- * @param string Course code
- * @param string Course title
- * @param string Wanted course code
- * @param string Course language
- * @param string Course category
- * @return true if the course creation succeeded, false otherwise
- * @todo research: expiration date of a course
- */
- public static function create_virtual_course($real_course_code, $course_title, $wanted_course_code, $course_language, $course_category) {
- global $firstExpirationDelay;
- $user_id = api_get_user_id();
- $real_course_info = Database::get_course_info($real_course_code);
- $real_course_code = $real_course_info['system_code'];
- //check: virtual course creation fails if another course has the same
- //code, real or fake.
- if (self::course_code_exists($wanted_course_code)) {
- Display::display_error_message($wanted_course_code.' - '.get_lang('CourseCodeAlreadyExists'));
- return false;
- }
- //add data to course table, course_rel_user
- $course_sys_code = $wanted_course_code;
- $course_screen_code = $wanted_course_code;
- $course_repository = $real_course_info['directory'];
- $course_db_name = $real_course_info['db_name'];
- $responsible_teacher = $real_course_info['tutor_name'];
- $faculty_shortname = $course_category;
- // $course_title = $course_title;
- // $course_language = $course_language;
- $teacher_id = $user_id;
- //HACK ----------------------------------------------------------------
- $expiration_date = time() + $firstExpirationDelay;
- //END HACK ------------------------------------------------------------
- register_course($course_sys_code, $course_screen_code, $course_repository, $course_db_name, $responsible_teacher, $faculty_shortname, $course_title, $course_language, $teacher_id, $expiration_date);
- //above was the normal course creation table update call,
- //now one more thing: fill in the target_course_code field
- Database::query("UPDATE ".Database::get_main_table(TABLE_MAIN_COURSE)." SET target_course_code = '$real_course_code'
- WHERE code = '".Database::escape_string($course_sys_code)."' LIMIT 1 ");
- return true;
- }
- /**
- * Delete a course
- * This function deletes a whole course-area from the platform. When the
- * given course is a virtual course, the database and directory will not be
- * deleted.
- * When the given course is a real course, also all virtual courses refering
- * to the given course will be deleted.
- * Considering the fact that we remove all traces of the course in the main
- * database, it makes sense to remove all tracking as well (if stats databases exist)
- * so that a new course created with this code would not use the remains of an older
- * course.
- *
- * @param string The code of the course to delete
- * @todo When deleting a virtual course: unsubscribe users from that virtual
- * course from the groups in the real course if they are not subscribed in
- * that real course.
- * @todo Remove globals
- */
- public static function delete_course($code) {
- global $_configuration;
- $table_course = Database::get_main_table(TABLE_MAIN_COURSE);
- $table_course_user = Database::get_main_table(TABLE_MAIN_COURSE_USER);
- $table_course_class = Database::get_main_table(TABLE_MAIN_COURSE_CLASS);
- $user_role_table = Database::get_main_table(MAIN_USER_ROLE_TABLE);
- $location_table = Database::get_main_table(MAIN_LOCATION_TABLE);
- $role_right_location_table = Database::get_main_table(MAIN_ROLE_RIGHT_LOCATION_TABLE);
- $table_session_course = Database::get_main_table(TABLE_MAIN_SESSION_COURSE);
- $table_session_course_user = Database::get_main_table(TABLE_MAIN_SESSION_COURSE_USER);
- $table_course_survey = Database::get_main_table(TABLE_MAIN_SHARED_SURVEY);
- $table_course_survey_question = Database::get_main_table(TABLE_MAIN_SHARED_SURVEY_QUESTION);
- $table_course_survey_question_option= Database::get_main_table(TABLE_MAIN_SHARED_SURVEY_QUESTION_OPTION);
-
- $table_stats_hotpots = Database::get_statistic_table(TABLE_STATISTIC_TRACK_E_HOTPOTATOES);
- $table_stats_attempt = Database::get_statistic_table(TABLE_STATISTIC_TRACK_E_ATTEMPT);
- $table_stats_exercises = Database::get_statistic_table(TABLE_STATISTIC_TRACK_E_EXERCICES);
- $table_stats_access = Database::get_statistic_table(TABLE_STATISTIC_TRACK_E_ACCESS);
- $table_stats_lastaccess = Database::get_statistic_table(TABLE_STATISTIC_TRACK_E_LASTACCESS);
- $table_stats_course_access = Database::get_statistic_table(TABLE_STATISTIC_TRACK_E_COURSE_ACCESS);
- $table_stats_online = Database::get_statistic_table(TABLE_STATISTIC_TRACK_E_ONLINE);
- $table_stats_default = Database::get_statistic_table(TABLE_STATISTIC_TRACK_E_DEFAULT);
- $table_stats_downloads = Database::get_statistic_table(TABLE_STATISTIC_TRACK_E_DOWNLOADS);
- $table_stats_links = Database::get_statistic_table(TABLE_STATISTIC_TRACK_E_LINKS);
- $table_stats_uploads = Database::get_statistic_table(TABLE_STATISTIC_TRACK_E_UPLOADS);
-
- $code = Database::escape_string($code);
- $sql = "SELECT * FROM $table_course WHERE code='".$code."'";
- $res = Database::query($sql);
- if (Database::num_rows($res) == 0) {
- return;
- }
- $this_course = Database::fetch_array($res);
- $db_name = $this_course['db_name'];
- self::create_database_dump($code);
- if (!self::is_virtual_course_from_system_code($code)) {
- // If this is not a virtual course, look for virtual courses that depend on this one, if any
- $virtual_courses = self::get_virtual_courses_linked_to_real_course($code);
- foreach ($virtual_courses as $index => $virtual_course) {
- // Unsubscribe all classes from the virtual course
- $sql = "DELETE FROM $table_course_class WHERE course_code='".$virtual_course['code']."'";
- Database::query($sql);
- // Unsubscribe all users from the virtual course
- $sql = "DELETE FROM $table_course_user WHERE course_code='".$virtual_course['code']."'";
- Database::query($sql);
- // Delete the course from the sessions tables
- $sql = "DELETE FROM $table_session_course WHERE course_code='".$virtual_course['code']."'";
- Database::query($sql);
- $sql = "DELETE FROM $table_session_course_user WHERE course_code='".$virtual_course['code']."'";
- Database::query($sql);
- // Delete the course from the survey tables
- $sql = "DELETE FROM $table_course_survey WHERE course_code='".$virtual_course['code']."'";
- Database::query($sql);
- $sql = "DELETE FROM $table_course_survey_user WHERE db_name='".$virtual_course['db_name']."'";
- Database::query($sql);
- $sql = "DELETE FROM $table_course_survey_reminder WHERE db_name='".$virtual_course['db_name']."'";
- Database::query($sql);
- // Delete the course from the stats tables
-
- $sql = "DELETE FROM $table_stats_hotpots WHERE exe_cours_id = '".$virtual_course['code']."'";
- Database::query($sql);
- $sql = "DELETE FROM $table_stats_attempt WHERE course_code = '".$virtual_course['code']."'";
- Database::query($sql);
- $sql = "DELETE FROM $table_stats_exercises WHERE exe_cours_id = '".$virtual_course['code']."'";
- Database::query($sql);
- $sql = "DELETE FROM $table_stats_access WHERE access_cours_code = '".$virtual_course['code']."'";
- Database::query($sql);
- $sql = "DELETE FROM $table_stats_lastaccess WHERE access_cours_code = '".$virtual_course['code']."'";
- Database::query($sql);
- $sql = "DELETE FROM $table_stats_course_access WHERE course_code = '".$virtual_course['code']."'";
- Database::query($sql);
- $sql = "DELETE FROM $table_stats_online WHERE course = '".$virtual_course['code']."'";
- Database::query($sql);
- $sql = "DELETE FROM $table_stats_default WHERE default_cours_code = '".$virtual_course['code']."'";
- Database::query($sql);
- $sql = "DELETE FROM $table_stats_downloads WHERE down_cours_id = '".$virtual_course['code']."'";
- Database::query($sql);
- $sql = "DELETE FROM $table_stats_links WHERE links_cours_id = '".$virtual_course['code']."'";
- Database::query($sql);
- $sql = "DELETE FROM $table_stats_uploads WHERE upload_cours_id = '".$virtual_course['code']."'";
- Database::query($sql);
-
- // Delete the course from the course table
- $sql = "DELETE FROM $table_course WHERE code='".$virtual_course['code']."'";
- Database::query($sql);
- }
- $sql = "SELECT * FROM $table_course WHERE code='".$code."'";
- $res = Database::query($sql);
- $course = Database::fetch_array($res);
- $course_tables = get_course_tables();
-
- //Cleaning c_x tables
- if (!empty($course['id'])) {
- foreach($course_tables as $table) {
- $table = Database::get_course_table($table);
- $sql = "DELETE FROM $table WHERE c_id = {$course['id']} ";
- Database::query($sql);
- }
- }
- $course_dir = api_get_path(SYS_COURSE_PATH).$course['directory'];
- $archive_dir = api_get_path(SYS_ARCHIVE_PATH).$course['directory'].'_'.time();
- if (is_dir($course_dir)) {
- rename($course_dir, $archive_dir);
- }
- }
- // Unsubscribe all classes from the course
- $sql = "DELETE FROM $table_course_class WHERE course_code='".$code."'";
- Database::query($sql);
- // Unsubscribe all users from the course
- $sql = "DELETE FROM $table_course_user WHERE course_code='".$code."'";
- Database::query($sql);
- // Delete the course from the sessions tables
- $sql = "DELETE FROM $table_session_course WHERE course_code='".$code."'";
- Database::query($sql);
- $sql = "DELETE FROM $table_session_course_user WHERE course_code='".$code."'";
- Database::query($sql);
- $sql = 'SELECT survey_id FROM '.$table_course_survey.' WHERE course_code="'.$code.'"';
- $result_surveys = Database::query($sql);
- while($surveys = Database::fetch_array($result_surveys)) {
- $survey_id = $surveys[0];
- $sql = 'DELETE FROM '.$table_course_survey_question.' WHERE survey_id="'.$survey_id.'"';
- Database::query($sql);
- $sql = 'DELETE FROM '.$table_course_survey_question_option.' WHERE survey_id="'.$survey_id.'"';
- Database::query($sql);
- $sql = 'DELETE FROM '.$table_course_survey.' WHERE survey_id="'.$survey_id.'"';
- Database::query($sql);
- }
- // Delete the course from the stats tables
-
- $sql = "DELETE FROM $table_stats_hotpots WHERE exe_cours_id = '".$code."'";
- Database::query($sql);
- $sql = "DELETE FROM $table_stats_attempt WHERE course_code = '".$code."'";
- Database::query($sql);
- $sql = "DELETE FROM $table_stats_exercises WHERE exe_cours_id = '".$code."'";
- Database::query($sql);
- $sql = "DELETE FROM $table_stats_access WHERE access_cours_code = '".$code."'";
- Database::query($sql);
- $sql = "DELETE FROM $table_stats_lastaccess WHERE access_cours_code = '".$code."'";
- Database::query($sql);
- $sql = "DELETE FROM $table_stats_course_access WHERE course_code = '".$code."'";
- Database::query($sql);
- $sql = "DELETE FROM $table_stats_online WHERE course = '".$code."'";
- Database::query($sql);
- $sql = "DELETE FROM $table_stats_default WHERE default_cours_code = '".$code."'";
- Database::query($sql);
- $sql = "DELETE FROM $table_stats_downloads WHERE down_cours_id = '".$code."'";
- Database::query($sql);
- $sql = "DELETE FROM $table_stats_links WHERE links_cours_id = '".$code."'";
- Database::query($sql);
- $sql = "DELETE FROM $table_stats_uploads WHERE upload_cours_id = '".$code."'";
- Database::query($sql);
-
- global $_configuration;
- if ($_configuration['multiple_access_urls']) {
- require_once api_get_path(LIBRARY_PATH).'urlmanager.lib.php';
- $url_id = 1;
- if (api_get_current_access_url_id() != -1) {
- $url_id = api_get_current_access_url_id();
- }
- UrlManager::delete_url_rel_course($code, $url_id);
- }
- // Delete the course from the database
- $sql = "DELETE FROM $table_course WHERE code='".$code."'";
- Database::query($sql);
- // delete extra course fields
- $t_cf = Database::get_main_table(TABLE_MAIN_COURSE_FIELD);
- $t_cfv = Database::get_main_table(TABLE_MAIN_COURSE_FIELD_VALUES);
- $sql = "SELECT distinct field_id FROM $t_cfv WHERE course_code = '$code'";
- $res_field_ids = @Database::query($sql);
- while($row_field_id = Database::fetch_row($res_field_ids)){
- $field_ids[] = $row_field_id[0];
- }
- //delete from table_course_field_value from a given course_code
- $sql_course_field_value = "DELETE FROM $t_cfv WHERE course_code = '$code'";
- @Database::query($sql_course_field_value);
- $sql = "SELECT distinct field_id FROM $t_cfv";
- $res_field_all_ids = @Database::query($sql);
- while($row_field_all_id = Database::fetch_row($res_field_all_ids)){
- $field_all_ids[] = $row_field_all_id[0];
- }
- if (is_array($field_ids) && count($field_ids) > 0) {
- foreach ($field_ids as $field_id) {
- // check if field id is used into table field value
- if (is_array($field_all_ids)) {
- if (in_array($field_id, $field_all_ids)) {
- continue;
- } else {
- $sql_course_field = "DELETE FROM $t_cf WHERE id = '$field_id'";
- Database::query($sql_course_field);
- }
- }
- }
- }
- // Add event to system log
- $user_id = api_get_user_id();
- event_system(LOG_COURSE_DELETE, LOG_COURSE_CODE, $code, api_get_utc_datetime(), $user_id, $code);
- }
- /**
- * Creates a file called mysql_dump.sql in the course folder
- * @param $course_code The code of the course
- * @todo Implementation for single database
- */
- public static function create_database_dump($course_code) {
- global $_configuration;
- if ($_configuration['single_database']) {
- return;
- }
- $sql_dump = '';
- $course_code = Database::escape_string($course_code);
- $table_course = Database::get_main_table(TABLE_MAIN_COURSE);
- $sql = "SELECT * FROM $table_course WHERE code = '$course_code'";
- $res = Database::query($sql);
- $course = Database::fetch_array($res);
-
- $course_tables = get_course_tables();
-
- if (!empty($course['id'])) {
- //Cleaning c_x tables
- foreach($course_tables as $table) {
- $table = Database::get_course_table($table);
- $sql = "SELECT * FROM $table WHERE c_id = {$course['id']} ";
- $res_table = Database::query($sql);
-
- while ($row = Database::fetch_array($res_table, 'ASSOC')) {
- $row_to_save = array();
- foreach ($row as $key => $value) {
- $row_to_save[$key] = $key."='".Database::escape_string($row[$key])."'";
- }
- $sql_dump .= "\nINSERT INTO $table SET ".implode(', ', $row_to_save).';';
- }
- }
- }
-
- if (is_dir(api_get_path(SYS_COURSE_PATH).$course['directory'])) {
- $file_name = api_get_path(SYS_COURSE_PATH).$course['directory'].'/mysql_dump.sql';
- $handle = fopen($file_name, 'a+');
- if ($handle !== false) {
- fwrite($handle, $sql_dump);
- fclose($handle);
- } else {
- //TODO trigger exception in a try-catch
- }
- }
- }
- /**
- * Sort courses for a specific user ??
- * @param int User ID
- * @param string Course code
- * @return int Minimum course order
- * @todo Review documentation
- */
- public static function userCourseSort($user_id, $course_code) {
- if ($user_id != strval(intval($user_id))) {
- return false;
- }
- $course_code = Database::escape_string($course_code);
- $TABLECOURSE = Database::get_main_table(TABLE_MAIN_COURSE);
- $TABLECOURSUSER = Database::get_main_table(TABLE_MAIN_COURSE_USER);
- $course_title = Database::result(Database::query('SELECT title FROM '.$TABLECOURSE.
- ' WHERE code="'.$course_code.'"'), 0, 0);
- $result = Database::query('SELECT course.code as code, course.title as title, cu.sort as sort FROM '.$TABLECOURSUSER.' as cu, '.$TABLECOURSE.' as course
- WHERE course.code = cu.course_code
- AND user_id = "'.$user_id.'"
- AND cu.relation_type<>'.COURSE_RELATION_TYPE_RRHH.'
- AND user_course_cat=0 ORDER BY cu.sort');
- $course_title_precedent = '';
- $counter = 0;
- $course_found = false;
- $course_sort = 1;
- while ($courses = Database::fetch_array($result)){
- if ($course_title_precedent == '') {
- $course_title_precedent = $courses['title'];
- }
- if (api_strcasecmp($course_title_precedent, $course_title) < 0) {
- $course_found = true;
- $course_sort = $courses['sort'];
- if ($counter == 0) {
- $sql = 'UPDATE '.$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.'"';
- $course_sort++;
- } else {
- $sql = 'UPDATE '.$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.'"';
- }
- Database::query($sql);
- break;
- } else {
- $course_title_precedent = $courses['title'];
- }
- $counter++;
- }
- // We must register the course in the beginning of the list
- if (Database::num_rows($result) > 0 && !$course_found) {
- $course_sort = Database::result(Database::query('SELECT min(sort) as min_sort FROM '.$TABLECOURSUSER.
- ' WHERE user_id="'.$user_id.'" AND user_course_cat="0"'), 0, 0);
- Database::query('UPDATE '.$TABLECOURSUSER.' SET sort = sort+1
- WHERE user_id= "'.$user_id.'" AND user_course_cat="0"');
- }
- return $course_sort;
- }
- /**
- * create recursively all categories as option of the select passed in paramater.
- *
- * @param object $select_element the quickform select where the options will be added
- * @param string $category_selected_code the option value to select by default (used mainly for edition of courses)
- * @param string $parent_code the parent category of the categories added (default=null for root category)
- * @param string $padding the indent param (you shouldn't indicate something here)
- */
- public static function select_and_sort_categories($select_element, $category_selected_code = '', $parent_code = null , $padding = '') {
-
- $sql = "SELECT code, name, auth_course_child, auth_cat_child
- FROM ".Database::get_main_table(TABLE_MAIN_CATEGORY)."
- WHERE parent_id ".(is_null($parent_code) ? "IS NULL" : "='".Database::escape_string($parent_code)."'")."
- ORDER BY code";
- $res = Database::query($sql);
- while ($cat = Database::fetch_array($res)) {
- $params = $cat['auth_course_child'] == 'TRUE' ? '' : 'disabled';
- $params .= ($cat['code'] == $category_selected_code) ? ' selected' : '';
- $select_element->addOption($padding.'('.$cat['code'].') '.$cat['name'], $cat['code'], $params);
- if ($cat['auth_cat_child']) {
- self::select_and_sort_categories($select_element, $category_selected_code, $cat['code'], $padding.' - ');
- }
- }
- }
- /**
- * check if course exists
- * @param string course_code
- * @param string whether to accept virtual course codes or not
- * @return true if exists, false else
- */
- public static function course_exists($course_code, $accept_virtual = false) {
- if ($accept_virtual === true) {
- $sql = 'SELECT 1 FROM '.Database::get_main_table(TABLE_MAIN_COURSE).' WHERE code="'.Database::escape_string($course_code).'" OR visual_code="'.Database::escape_string($course_code).'"';
- } else {
- $sql = 'SELECT 1 FROM '.Database::get_main_table(TABLE_MAIN_COURSE).' WHERE code="'.Database::escape_string($course_code).'"';
- }
- return Database::num_rows(Database::query($sql));
- }
- /**
- * Send an email to tutor after the auth-suscription of a student in your course
- * @author Carlos Vargas <carlos.vargas@dokeos.com>, Dokeos Latino
- * @param int $user_id the id of the user
- * @param string $course_code the course code
- * @param string $send_to_tutor_also
- * @return string we return the message that is displayed when the action is succesfull
- */
- public static function email_to_tutor($user_id, $course_code, $send_to_tutor_also = false) {
- if ($user_id != strval(intval($user_id))) {
- return false;
- }
- $course_code = Database::escape_string($course_code);
- $student = Database::fetch_array(Database::query("SELECT * FROM ".Database::get_main_table(TABLE_MAIN_USER)."
- WHERE user_id='".$user_id."'"));
- $information = self::get_course_information($course_code);
- $name_course = $information['title'];
- $sql = "SELECT * FROM ".Database::get_main_table(TABLE_MAIN_COURSE_USER)." WHERE course_code='".$course_code."'";
- // TODO: Ivan: This is a mistake, please, have a look at it. Intention here is diffcult to be guessed.
- //if ($send_to_tutor_also = true) {
- // Proposed change:
- if ($send_to_tutor_also) {
- //
- $sql .= " AND tutor_id=1";
- } else {
- $sql .= " AND status=1";
- }
- $result = Database::query($sql);
- while ($row = Database::fetch_array($result)) {
- $tutor = Database::fetch_array(Database::query("SELECT * FROM ".Database::get_main_table(TABLE_MAIN_USER)."
- WHERE user_id='".$row['user_id']."'"));
- $emailto = $tutor['email'];
- $emailsubject = get_lang('NewUserInTheCourse').': '.$name_course;
- $emailbody = get_lang('Dear').': '. api_get_person_name($tutor['firstname'], $tutor['lastname'])."\n";
- $emailbody .= get_lang('MessageNewUserInTheCourse').': '.$name_course."\n";
- $emailbody .= get_lang('UserName').': '.$student['username']."\n";
- if (api_is_western_name_order()) {
- $emailbody .= get_lang('FirstName').': '.$student['firstname']."\n";
- $emailbody .= get_lang('LastName').': '.$student['lastname']."\n";
- } else {
- $emailbody .= get_lang('LastName').': '.$student['lastname']."\n";
- $emailbody .= get_lang('FirstName').': '.$student['firstname']."\n";
- }
- $emailbody .= get_lang('Email').': '.$student['email']."\n\n";
- $recipient_name = api_get_person_name($tutor['firstname'], $tutor['lastname'], null, PERSON_NAME_EMAIL_ADDRESS);
- $sender_name = api_get_person_name(api_get_setting('administratorName'), api_get_setting('administratorSurname'), null, PERSON_NAME_EMAIL_ADDRESS);
- $email_admin = api_get_setting('emailAdministrator');
- @api_mail($recipient_name, $emailto, $emailsubject, $emailbody, $sender_name,$email_admin);
- }
- }
-
- public static function get_special_course_list() {
- $tbl_course_field = Database :: get_main_table(TABLE_MAIN_COURSE_FIELD);
- $tbl_course_field_value = Database :: get_main_table(TABLE_MAIN_COURSE_FIELD_VALUES);
-
- //we filter the courses from the URL
- $join_access_url = $where_access_url='';
- if (api_get_multiple_access_url()) {
- $access_url_id = api_get_current_access_url_id();
- if ($access_url_id != -1) {
- $tbl_url_course = Database :: get_main_table(TABLE_MAIN_ACCESS_URL_REL_COURSE);
- $join_access_url= "LEFT JOIN $tbl_url_course url_rel_course ON url_rel_course.course_code= tcfv.course_code ";
- $where_access_url =" AND access_url_id = $access_url_id ";
- }
- }
-
- // get course list auto-register
- $sql = "SELECT DISTINCT(tcfv.course_code) FROM $tbl_course_field_value tcfv INNER JOIN $tbl_course_field tcf
- ON tcfv.field_id = tcf.id $join_access_url
- WHERE tcf.field_variable = 'special_course' AND tcfv.field_value = 1 $where_access_url";
- $special_course_result = Database::query($sql);
- $special_course_list = array();
-
- if (Database::num_rows($special_course_result)>0) {
- $special_course_list = array();
- while ($result_row = Database::fetch_array($special_course_result)) {
- $special_course_list[] = $result_row['course_code'];
- }
- }
- return $special_course_list;
- }
- /**
- * Get list of courses for a given user
- * @param int user ID
- * @param boolean Whether to include courses from session or not
- * @return array List of codes and db names
- * @author isaac flores paz
- */
- public static function get_courses_list_by_user_id($user_id, $include_sessions = false) {
- $user_id = intval($user_id);
- $course_list = array();
- $codes = array();
- $tbl_course = Database::get_main_table(TABLE_MAIN_COURSE);
- $tbl_course_user = Database::get_main_table(TABLE_MAIN_COURSE_USER);
- $tbl_user_course_category = Database::get_user_personal_table(TABLE_USER_COURSE_CATEGORY);
-
-
- $special_course_list = self::get_special_course_list();
-
- $with_special_courses = $without_special_courses = '';
- if (!empty($special_course_list)) {
- $sc_string = '"'.implode('","',$special_course_list).'"';
- $with_special_courses = ' course.code IN ('.$sc_string.')';
- $without_special_courses = ' AND course.code NOT IN ('.$sc_string.')';
- }
-
- if (!empty($with_special_courses)) {
- $sql = "SELECT DISTINCT(course.code), course.db_name db_name, course.title , course.id as course_id, course.id as real_id
- FROM ".$tbl_course_user." course_rel_user
- LEFT JOIN ".$tbl_course." course
- ON course.code = course_rel_user.course_code
- LEFT JOIN ".$tbl_user_course_category." user_course_category
- ON course_rel_user.user_course_cat = user_course_category.id
- WHERE $with_special_courses
- GROUP BY course.code
- ORDER BY user_course_category.sort,course.title,course_rel_user.sort ASC";
- $rs_special_course = Database::query($sql);
- if (Database::num_rows($rs_special_course) > 0) {
- while ($result_row = Database::fetch_array($rs_special_course)) {
- $result_row['special_course'] = 1;
- $course_list[] = $result_row;
- $codes[] = $result_row['code'];
- }
- }
- }
- // get course list not auto-register. Use Distinct to avoid multiple
- // entries when a course is assigned to a HRD (DRH) as watcher
- $sql = "SELECT DISTINCT(course.code),course.db_name,course.title , course.id as course_id, course.id as real_id
- FROM $tbl_course course
- INNER JOIN $tbl_course_user cru
- ON course.code=cru.course_code
- WHERE cru.user_id='$user_id' $without_special_courses";
- $result = Database::query($sql);
- if (Database::num_rows($result)) {
- while ($row = Database::fetch_array($result, 'ASSOC')) {
- $course_list[] = $row;
- $codes[] = $row['code'];
- }
- }
- if ($include_sessions === true) {
- $r = Database::query("SELECT DISTINCT(c.code), c.db_name, c.title, c.id as course_id, c.id as real_id
- FROM ".Database::get_main_table(TABLE_MAIN_SESSION_COURSE_USER)." s, ".Database::get_main_table(TABLE_MAIN_COURSE)." c
- WHERE id_user = $user_id AND s.course_code=c.code");
- while ($row = Database::fetch_array($r, 'ASSOC')) {
- if (!in_array($row['code'], $codes)) {
- $course_list[] = $row;
- }
- }
- }
- return $course_list;
- }
- /**
- * Get course ID from a given course directory name
- * @param string Course directory (without any slash)
- * @return string Course code, or false if not found
- */
- public static function get_course_id_from_path ($path) {
- $path = Database::escape_string(str_replace('.', '', str_replace('/', '', $path)));
- $res = Database::query("SELECT code FROM ".Database::get_main_table(TABLE_MAIN_COURSE)."
- WHERE directory LIKE BINARY '$path'");
- if ($res === false) {
- return false;
- }
- if (Database::num_rows($res) != 1) {
- return false;
- }
- $row = Database::fetch_array($res);
- return $row['code'];
- }
- /**
- * Get course code(s) from visual code
- * @param string Visual code
- * @return array List of codes for the given visual code
- */
- public static function get_courses_info_from_visual_code($code) {
- $result = array();
- $sql_result = Database::query("SELECT * FROM ".Database::get_main_table(TABLE_MAIN_COURSE)."
- WHERE visual_code = '".Database::escape_string($code)."'");
- while ($virtual_course = Database::fetch_array($sql_result)) {
- $result[] = $virtual_course;
- }
- return $result;
- }
- /**
- * Get emails of tutors to course
- * @param string Visual code
- * @return array List of emails of tutors to course
- * @author @author Carlos Vargas <carlos.vargas@dokeos.com>, Dokeos Latino
- * */
- public static function get_emails_of_tutors_to_course($code) {
- $list = array();
- $res = Database::query("SELECT user_id FROM ".Database::get_main_table(TABLE_MAIN_COURSE_USER)."
- WHERE course_code='".Database::escape_string($code)."' AND status=1");
- while ($list_users = Database::fetch_array($res)) {
- $result = Database::query("SELECT * FROM ".Database::get_main_table(TABLE_MAIN_USER)."
- WHERE user_id=".$list_users['user_id']);
- while ($row_user = Database::fetch_array($result)){
- $name_teacher = api_get_person_name($row_user['firstname'], $row_user['lastname'], null, PERSON_NAME_EMAIL_ADDRESS);
- $list[] = array($row_user['email'] => $name_teacher);
- }
- }
- return $list;
- }
- /**
- * Get coachs' emails by session
- * @param int session id
- * @param string course code
- * @return array array(email => name_tutor) by coach
- * @author Carlos Vargas <carlos.vargas@dokeos.com>
- */
- public static function get_email_of_tutor_to_session($session_id,$course_code) {
- $tbl_session_course_user = Database::get_main_table(TABLE_MAIN_SESSION_COURSE_USER);
- $tbl_user = Database::get_main_table(TABLE_MAIN_USER);
- $coachs_emails = array();
- $course_code = Database::escape_string($course_code);
- $session_id = intval($session_id);
- $sql = "SELECT id_user FROM $tbl_session_course_user WHERE id_session='$session_id' AND course_code='$course_code' AND status =2";
- $rs = Database::query($sql);
- if (Database::num_rows($rs) > 0) {
- $user_ids = array();
- while ($row = Database::fetch_array($rs)) {
- $user_ids[] = $row['id_user'];
- }
- $sql = "SELECT firstname,lastname,email FROM $tbl_user WHERE user_id IN (".implode(",",$user_ids).")";
- $rs_user = Database::query($sql);
- while ($row_emails = Database::fetch_array($rs_user)) {
- $name_tutor = api_get_person_name($row_emails['firstname'], $row_emails['lastname'], null, PERSON_NAME_EMAIL_ADDRESS);
- $mail_tutor = array($row_emails['email'] => $name_tutor);
- $coachs_emails[] = $mail_tutor;
- }
- }
- return $coachs_emails;
- }
- /**
- * Creates a new extra field for a given course
- * @param string Field's internal variable name
- * @param int Field's type
- * @param string Field's language var name
- * @return int new extra field id
- */
- public static function create_course_extra_field($fieldvarname, $fieldtype, $fieldtitle) {
- // database table definition
- $t_cfv = Database::get_main_table(TABLE_MAIN_COURSE_FIELD_VALUES);
- $t_cf = Database::get_main_table(TABLE_MAIN_COURSE_FIELD);
- $fieldvarname = Database::escape_string($fieldvarname);
- $fieldtitle = Database::escape_string($fieldtitle);
- $fieldtype = (int)$fieldtype;
- $time = time();
- $sql_field = "SELECT id FROM $t_cf WHERE field_variable = '$fieldvarname'";
- $res_field = Database::query($sql_field);
- $r_field = Database::fetch_row($res_field);
- if (Database::num_rows($res_field) > 0) {
- return $r_field[0];
- }
- // save new fieldlabel into course_field table
- $sql = "SELECT MAX(field_order) FROM $t_cf";
- $res = Database::query($sql);
- $order = 0;
- if (Database::num_rows($res) > 0) {
- $row = Database::fetch_row($res);
- $order = $row[0] + 1;
- }
- $sql = "INSERT INTO $t_cf
- SET field_type = '$fieldtype',
- field_variable = '$fieldvarname',
- field_display_text = '$fieldtitle',
- field_order = '$order',
- tms = FROM_UNIXTIME($time)";
- Database::query($sql);
- return Database::insert_id();
- }
- /**
- * Updates course attribute. Note that you need to check that your attribute is valid before you use this function
- *
- * @param int Course id
- * @param string Attribute name
- * @param string Attribute value
- * @return bool True if attribute was successfully updated, false if course was not found or attribute name is invalid
- */
- public static function update_attribute($id, $name, $value) {
- $id = (int)$id;
- $table = Database::get_main_table(TABLE_MAIN_COURSE);
- $sql = "UPDATE $table SET $name = '".Database::escape_string($value)."' WHERE id = '$id';";
- return Database::query($sql);
- }
- /**
- * 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
- *
- * @param int Course id
- * @param array Associative array with field names as keys and field values as values
- * @return bool True if update was successful, false otherwise
- */
- public static function update_attributes($id, $attributes) {
- $id = (int)$id;
- $table = Database::get_main_table(TABLE_MAIN_COURSE);
- $sql = "UPDATE $table SET ";
- $i = 0;
- foreach($attributes as $name => $value) {
- if($value != '') {
- if($i > 0) {
- $sql .= ", ";
- }
- $sql .= " $name = '".Database::escape_string($value)."'";
- $i++;
- }
- }
- $sql .= " WHERE id = '$id';";
- return Database::query($sql);
- }
- /**
- * Update an extra field value for a given course
- * @param integer Course ID
- * @param string Field variable name
- * @param string Field value
- * @return boolean true if field updated, false otherwise
- */
- public static function update_course_extra_field_value($course_code, $fname, $fvalue = '') {
- $t_cfv = Database::get_main_table(TABLE_MAIN_COURSE_FIELD_VALUES);
- $t_cf = Database::get_main_table(TABLE_MAIN_COURSE_FIELD);
- $fname = Database::escape_string($fname);
- $course_code = Database::escape_string($course_code);
- $fvalues = '';
- if (is_array($fvalue)) {
- foreach ($fvalue as $val) {
- $fvalues .= Database::escape_string($val).';';
- }
- if (!empty($fvalues)) {
- $fvalues = substr($fvalues, 0, -1);
- }
- } else {
- $fvalues = Database::escape_string($fvalue);
- }
- $sqlcf = "SELECT * FROM $t_cf WHERE field_variable='$fname'";
- $rescf = Database::query($sqlcf);
- if (Database::num_rows($rescf) == 1) {
- // Ok, the field exists
- // Check if enumerated field, if the option is available
- $rowcf = Database::fetch_array($rescf);
- $tms = time();
- $sqlcfv = "SELECT * FROM $t_cfv WHERE course_code = '$course_code' AND field_id = '".$rowcf['id']."' ORDER BY id";
- $rescfv = Database::query($sqlcfv);
- $n = Database::num_rows($rescfv);
- if ($n > 1) {
- //problem, we already have to values for this field and user combination - keep last one
- while ($rowcfv = Database::fetch_array($rescfv)) { // See the TODO note below.
- if ($n > 1) {
- $sqld = "DELETE FROM $t_cfv WHERE id = ".$rowcfv['id'];
- $resd = Database::query($sqld);
- $n--;
- }
- $rowcfv = Database::fetch_array($rescfv);
- if ($rowcfv['field_value'] != $fvalues) {
- $sqlu = "UPDATE $t_cfv SET field_value = '$fvalues', tms = FROM_UNIXTIME($tms) WHERE id = ".$rowcfv['id'];
- $resu = Database::query($sqlu);
- return ($resu ? true : false);
- }
- return true; // TODO: Sure exit from the function occures in this "while" cycle. Logic should checked. Maybe "if" instead of "while"? It is not clear...
- }
- } elseif ($n == 1) {
- //we need to update the current record
- $rowcfv = Database::fetch_array($rescfv);
- if ($rowcfv['field_value'] != $fvalues) {
- $sqlu = "UPDATE $t_cfv SET field_value = '$fvalues', tms = FROM_UNIXTIME($tms) WHERE id = ".$rowcfv['id'];
- //error_log('UM::update_extra_field_value: '.$sqlu);
- $resu = Database::query($sqlu);
- return ($resu ? true : false);
- }
- return true;
- } else {
- $sqli = "INSERT INTO $t_cfv (course_code,field_id,field_value,tms) " .
- "VALUES ('$course_code',".$rowcf['id'].",'$fvalues',FROM_UNIXTIME($tms))";
- //error_log('UM::update_extra_field_value: '.$sqli);
- $resi = Database::query($sqli);
- return ($resi ? true : false);
- }
- } else {
- return false; //field not found
- }
- }
- /**
- * Get the course id of an course by the database name
- * @param string The database name
- * @return string The course id
- */
- public static function get_course_id_by_database_name($db_name) {
- return Database::result(Database::query('SELECT code FROM '.Database::get_main_table(TABLE_MAIN_COURSE).
- ' WHERE db_name="'.Database::escape_string($db_name).'"'), 0, 'code');
- }
- public static function get_session_category_id_by_session_id($session_id) {
- return Database::result(Database::query('SELECT sc.id session_category
- FROM '.Database::get_main_table(TABLE_MAIN_SESSION_CATEGORY).' sc
- INNER JOIN '.Database::get_main_table(TABLE_MAIN_SESSION).' s
- ON sc.id=s.session_category_id WHERE s.id="'.Database::escape_string($session_id).'"'),
- 0, 'session_category');
- }
- /**
- * Get the course id of an course by the database name
- * @param string The database name
- * @return string The course id
- */
- public static function get_course_extra_field_list($code) {
- $tbl_course_field = Database::get_main_table(TABLE_MAIN_COURSE_FIELD);
- $tbl_course_field_value = Database::get_main_table(TABLE_MAIN_COURSE_FIELD_VALUES);
- $sql_field = "SELECT id, field_type, field_variable, field_display_text, field_default_value
- FROM $tbl_course_field WHERE field_visible = '1' ";
- $res_field = Database::query($sql_field);
- $extra_fields = array();
- while($rowcf = Database::fetch_array($res_field)) {
- $extra_field_id = $rowcf['id'];
- $sql_field_value = "SELECT field_value FROM $tbl_course_field_value WHERE course_code = '$code' AND field_id = '$extra_field_id' ";
- $res_field_value = Database::query($sql_field_value);
- if(Database::num_rows($res_field_value) > 0 ) {
- $r_field_value = Database::fetch_row($res_field_value);
- $rowcf['extra_field_value'] = $r_field_value[0];
- }
- $extra_fields[] = $rowcf;
- }
- return $extra_fields;
- }
- /**
- * Gets the value of a course extra field. Returns null if it was not found
- *
- * @param string Name of the extra field
- * @param string Course code
- * @return string Value
- */
- public static function get_course_extra_field_value($field_name, $code) {
- $tbl_course_field = Database::get_main_table(TABLE_MAIN_COURSE_FIELD);
- $tbl_course_field_value = Database::get_main_table(TABLE_MAIN_COURSE_FIELD_VALUES);
- $sql = "SELECT id FROM $tbl_course_field WHERE field_visible = '1' AND field_variable = '$field_name';";
- $res = Database::query($sql);
- $row = Database::fetch_object($res);
- if(!$row) {
- return null;
- } else {
- $sql_field_value = "SELECT field_value FROM $tbl_course_field_value WHERE course_code = '$code' AND field_id = '{$row->id}';";
- $res_field_value = Database::query($sql_field_value);
- $row_field_value = Database::fetch_object($res_field_value);
- if(!$row_field_value) {
- return null;
- } else {
- return $row_field_value['field_value'];
- }
- }
- }
- /**
- * Get the database name of a course by the code
- * @param string The course code
- * @return string The database name
- */
- public static function get_name_database_course($course_code) {
- return Database::result(Database::query('SELECT db_name FROM '.Database::get_main_table(TABLE_MAIN_COURSE).
- ' WHERE code="'.Database::escape_string($course_code).'"'), 0, 'db_name');
- }
- /**
- * Lists details of the course description
- * @param array The course description
- * @param string The encoding
- * @param bool If true is displayed if false is hidden
- * @return string The course description in html
- */
- public static function get_details_course_description_html($descriptions, $charset, $action_show = true) {
- if (isset($descriptions) && count($descriptions) > 0) {
- $data = '';
- foreach ($descriptions as $id => $description) {
- $data .= '<div class="sectiontitle">';
- if (api_is_allowed_to_edit() && $action_show) {
- //delete
- $data .= '<a href="'.api_get_self().'?'.api_get_cidreq().'&action=delete&description_id='.$description->id.'" onclick="javascript:if(!confirm(\''.addslashes(api_htmlentities(get_lang('ConfirmYourChoice'), ENT_QUOTES, $charset)).'\')) return false;">';
- $data .= Display::return_icon('delete.gif', get_lang('Delete'), array('style' => 'vertical-align:middle;float:right;'));
- $data .= '</a> ';
- //edit
- $data .= '<a href="'.api_get_self().'?'.api_get_cidreq().'&description_id='.$description->id.'">';
- $data .= Display::return_icon('edit.png', get_lang('Edit'), array('style' => 'vertical-align:middle;float:right; padding-right:4px;'), 22);
- $data .= '</a> ';
- }
- $data .= $description->title;
- $data .= '</div>';
- $data .= '<div class="sectioncomment">';
- $data .= text_filter($description->content);
- $data .= '</div>';
- }
- } else {
- $data .= '<em>'.get_lang('ThisCourseDescriptionIsEmpty').'</em>';
- }
- return $data;
- }
- /**
- * Returns the details of a course category
- *
- * @param string Category code
- * @return array Course category
- */
- public static function get_course_category($code) {
- $table_categories = Database::get_main_table(TABLE_MAIN_CATEGORY);
- $sql = "SELECT * FROM $table_categories WHERE code = '$code';";
- return Database::fetch_array(Database::query($sql));
- }
- /*
- ==============================================================================
- DEPRECATED METHODS
- ==============================================================================
- */
- /**
- * This code creates a select form element to let the user
- * choose a real course to link to.
- *
- * A good non-display library should not use echo statements, but just return text/html
- * so users of the library can choose when to display.
- *
- * We display the course code, but internally store the course id.
- *
- * @param boolean $has_size, true the select tag gets a size element, false it stays a dropdownmenu
- * @param boolean $only_current_user_courses, true only the real courses of which the
- * current user is course admin are displayed, false all real courses are shown.
- * @param string $element_name the name of the select element
- * @return a string containing html code for a form select element.
- * @deprecated Function not in use
- */
- public static function get_real_course_code_select_html($element_name, $has_size = true, $only_current_user_courses = true, $user_id) {
- if ($only_current_user_courses) {
- $real_course_list = self::get_real_course_list_of_user_as_course_admin($user_id);
- } else {
- $real_course_list = self::get_real_course_list();
- }
- if ($has_size) {
- $size_element = "size=\"".SELECT_BOX_SIZE."\"";
- } else {
- $size_element = "";
- }
- $html_code = "<select name=\"$element_name\" $size_element >\n";
- foreach ($real_course_list as $real_course) {
- $course_code = $real_course["code"];
- $html_code .= "<option value=\"".$course_code."\">";
- $html_code .= $course_code;
- $html_code .= "</option>\n";
- }
- $html_code .= "</select>\n";
- return $html_code;
- }
- /**
- * Get count rows of a table inside a course database
- * @param string The table of which the rows should be counted
- * @param int optionally count rows by session id
- * @return int The number of rows in the given table.
- */
- public static function count_rows_course_table($table, $session_id = '', $course_id = null) {
- $condition_session = '';
- if ($session_id !== '') {
- $session_id = intval($session_id);
- $condition_session = " AND session_id = '$session_id' ";
- }
- if (!empty($course_id)) {
- $course_id = intval($course_id);
- } else {
- $course_id = api_get_course_int_id();
- }
- $condition_session .= " AND c_id = '$course_id' ";
-
- $sql = "SELECT COUNT(*) AS n FROM $table WHERE 1=1 $condition_session ";
- $rs = Database::query($sql);
- $row = Database::fetch_row($rs);
- return $row[0];
- }
- /**
- * Subscribes courses to human resource manager (Dashboard feature)
- * @param int Human Resource Manager id
- * @param array Courses code
- * @param int Relation type
- **/
- public static function suscribe_courses_to_hr_manager($hr_manager_id,$courses_list) {
- global $_configuration;
- // Database Table Definitions
- $tbl_course = Database::get_main_table(TABLE_MAIN_COURSE);
- $tbl_course_rel_user = Database::get_main_table(TABLE_MAIN_COURSE_USER);
- $tbl_course_rel_access_url = Database::get_main_table(TABLE_MAIN_ACCESS_URL_REL_COURSE);
- $hr_manager_id = intval($hr_manager_id);
- $affected_rows = 0;
- //Deleting assigned courses to hrm_id
- if ($_configuration['multiple_access_urls']) {
- $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()."";
- } else {
- $sql = "SELECT course_code FROM $tbl_course_rel_user WHERE user_id = $hr_manager_id AND relation_type=".COURSE_RELATION_TYPE_RRHH." ";
- }
- $result = Database::query($sql);
- if (Database::num_rows($result) > 0) {
- while ($row = Database::fetch_array($result)) {
- $sql = "DELETE FROM $tbl_course_rel_user WHERE course_code = '{$row['course_code']}' AND user_id = $hr_manager_id AND relation_type=".COURSE_RELATION_TYPE_RRHH." ";
- Database::query($sql);
- }
- }
- // inserting new courses list
- if (is_array($courses_list)) {
- foreach ($courses_list as $course_code) {
- $course_code = Database::escape_string($course_code);
- $insert_sql = "INSERT IGNORE INTO $tbl_course_rel_user(course_code, user_id, status, relation_type) VALUES('$course_code', $hr_manager_id, '".DRH."', '".COURSE_RELATION_TYPE_RRHH."')";
- Database::query($insert_sql);
- if (Database::affected_rows()) {
- $affected_rows++;
- }
- }
- }
- return $affected_rows;
- }
- /**
- * get courses followed by human resources manager
- * @param int human resources manager id
- * @return array courses
- */
- public static function get_courses_followed_by_drh($hr_dept_id) {
- // Database Table Definitions
- $tbl_course = Database::get_main_table(TABLE_MAIN_COURSE);
- $tbl_course_rel_user = Database::get_main_table(TABLE_MAIN_COURSE_USER);
- $tbl_course_rel_access_url = Database::get_main_table(TABLE_MAIN_ACCESS_URL_REL_COURSE);
- $hr_dept_id = intval($hr_dept_id);
- $assigned_courses_to_hrm = array();
- if (api_get_multiple_access_url()) {
- $sql = "SELECT * FROM $tbl_course c
- 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()."";
- } else {
- $sql = "SELECT * FROM $tbl_course c
- 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."' ";
- }
- $rs_assigned_courses = Database::query($sql);
- if (Database::num_rows($rs_assigned_courses) > 0) {
- while ($row_assigned_courses = Database::fetch_array($rs_assigned_courses)) {
- $assigned_courses_to_hrm[$row_assigned_courses['code']] = $row_assigned_courses;
- }
- }
- return $assigned_courses_to_hrm;
- }
- /**
- * check if a course is special (autoregister)
- * @param string course code
- */
- public static function is_special_course($course_code){
- $tbl_course_field_value = Database::get_main_table(TABLE_MAIN_COURSE_FIELD_VALUES);
- $tbl_course_field = Database::get_main_table(TABLE_MAIN_COURSE_FIELD);
- $is_special = false;
- $sql = "SELECT course_code FROM $tbl_course_field_value tcfv INNER JOIN $tbl_course_field tcf ON " .
- " tcfv.field_id = tcf.id WHERE tcf.field_variable = 'special_course' AND tcfv.field_value = 1 AND course_code='$course_code'";
- $result = Database::query($sql);
- $num_rows = Database::num_rows($result);
- if ($num_rows > 0){
- $is_special = true;
- }
- return $is_special;
- }
- /**
- * Update course picture
- * @param string Course code
- * @param string File name
- * @param string The full system name of the image from which course picture will be created.
- * @return bool Returns the resulting. In case of internal error or negative validation returns FALSE.
- */
- public static function update_course_picture($course_code, $filename, $source_file = null) {
- $course_info = api_get_course_info($course_code);
- $store_path = api_get_path(SYS_COURSE_PATH).$course_info['path']; // course path
- $course_image = $store_path.'/course-pic.png'; // image name for courses
- $course_medium_image = $store_path.'/course-pic85x85.png';
- $extension = strtolower(substr(strrchr($filename, '.'), 1));
- $result = false;
- if (file_exists($course_image)) {
- @unlink($course_image);
- }
- if (file_exists($course_medium_image)) {
- @unlink($course_medium_image);
- }
- $my_course_image = new Image($source_file);
- $result = $my_course_image->send_image($course_image, -1, 'png');
- //Redimension image to 100x85
- if ($result) {
- $medium = new Image($course_image);
- $picture_infos = $medium->get_image_size();
- $medium->resize(100, 85, 0, false);
- $rs = $medium->send_image($store_path.'/course-pic85x85.png', -1, 'png');
- }
- return $result;
- }
- /**
- * @deprecated See CourseManager::course_code_exists()
- */
- public static function is_existing_course_code($wanted_course_code) {
- return self::course_code_exists($wanted_course_code);
- }
- /**
- * Display special courses (and only these) as several HTML divs of class userportal-course-item
- *
- * Special courses are courses that stick on top of the list and are "auto-registerable"
- * in the sense that any user clicking them is registered as a student
- * @param int User id
- * @param bool Whether to show the document quick-loader or not
- * @return void
- */
- function display_special_courses($user_id, $load_dirs = false) {
- $user_id = intval($user_id);
- $user_info = api_get_user_info($user_id);
-
- $tbl_course = Database::get_main_table(TABLE_MAIN_COURSE);
- $tbl_course_user = Database::get_main_table(TABLE_MAIN_COURSE_USER);
- $tbl_user_course_category = Database::get_user_personal_table(TABLE_USER_COURSE_CATEGORY);
- $special_course_list = self::get_special_course_list();
-
- $with_special_courses = $without_special_courses = '';
- if (!empty($special_course_list)) {
- $with_special_courses = ' course.code IN ("'.implode('","',$special_course_list).'")';
- }
- if (!empty($with_special_courses)) {
- $sql = "SELECT course.id, course.code, course.visual_code, course.subscribe subscr, course.unsubscribe unsubscr,
- course.title title, course.tutor_name tutor, course.db_name, course.directory, course_rel_user.status status,
- course_rel_user.sort sort, course_rel_user.user_course_cat user_course_cat, course_rel_user.user_id, course.visibility
- FROM $tbl_course course
- LEFT JOIN $tbl_course_user course_rel_user ON course.code = course_rel_user.course_code AND course_rel_user.user_id = '$user_id'
- WHERE $with_special_courses group by course.code";
- $rs_special_course = Database::query($sql);
- $number_of_courses = Database::num_rows($rs_special_course);
- $key = 0;
- $status_icon = '';
- if ($number_of_courses > 0) {
- while ($course = Database::fetch_array($rs_special_course)) {
- // Get notifications.
- $my_course = array();
- $my_course['db'] = $course['db_name'];
- $my_course['k'] = $course['code'];
- $my_course['id_session'] = null;
- $my_course['s'] = $course['status'];
- $show_notification = Display::show_notification($my_course);
- if (empty($course['user_id'])) {
- $course['status'] = $user_info['status'];
- }
- $status_icon = Display::return_icon('blackboard.png', get_lang('Course'), array('width'=>'48px'));
- /*
- if ($course['status'] == 1) {
- $status_icon = Display::return_icon('course.gif', get_lang('Course')).' '.Display::return_icon('teachers.gif', get_lang('Status').': '.get_lang('Teacher'), array('style' => 'width: 11px; height: 11px;'));
- }
- if (($course['status'] == 5 && !api_is_coach()) || empty($course['status'])) {
- $status_icon = Display::return_icon('course.gif', get_lang('Course')).' '.Display::return_icon('students.gif', get_lang('Status').': '.get_lang('Student'), array('style' => 'width: 11px; height: 11px;'));
- }*/
- echo '<div class="userportal-course-item">';
- if (api_is_platform_admin()) {
- echo '<div style="float:right;">';
-
- if ($load_dirs) {
- echo '<a id="document_preview_'.$course['id'].'_0" class="document_preview" href="javascript:void(0);">'.Display::return_icon('folder.png', get_lang('Documents'), array('align' => 'absmiddle'),22).'</a>';
- echo '<a href="'.api_get_path(WEB_CODE_PATH).'course_info/infocours.php?cidReq='.$course['code'].'">'.Display::return_icon('edit.png', get_lang('Edit'), array('align' => 'absmiddle'),22).'</a>';
- echo Display::div('', array('id' => 'document_result_'.$course['id'].'_0', 'class'=>'document_preview_container'));
- } else {
- echo '<a href="'.api_get_path(WEB_CODE_PATH).'course_info/infocours.php?cidReq='.$course['code'].'">'.Display::return_icon('edit.png', get_lang('Edit'), array('align' => 'absmiddle'),22).'</a>';
- }
-
- if ($course['status'] == COURSEMANAGER) {
- //echo Display::return_icon('teachers.gif', get_lang('Status').': '.get_lang('Teacher'), array('style'=>'width: 11px; height: 11px;'));
- }
- echo '</div>';
- } else {
- echo '<div style="float:right;">';
- if ($load_dirs) {
- echo '<a id="document_preview_'.$course['id'].'_0" class="document_preview" href="javascript:void(0);">'.Display::return_icon('folder.png', get_lang('Documents'), array('align' => 'absmiddle'),22).'</a>';
- echo Display::div('', array('id' => 'document_result_'.$course['id'].'_0', 'class'=>'document_preview_container'));
- }
- echo '</div>';
- }
- $course_visibility = $course['visibility'];
- if ($course_visibility != COURSE_VISIBILITY_CLOSED || $course['status'] == COURSEMANAGER) {
- $course_title = '<a href="'.api_get_path(WEB_COURSE_PATH).$course['directory'].'/?id_session=0&autoreg=1">'.$course['title'].'</a>';
- } else {
- $course_title = $course['title']." ".Display::tag('span',get_lang('CourseClosed'), array('class'=>'item_closed'));
- }
- echo '<div style="float: left; margin-right: 10px;">'.$status_icon.'</div><span class="userportal-course-item-title">'.$course_title.'</span><br />';
- if (api_get_setting('display_coursecode_in_courselist') == 'true') {
- echo $course['visual_code'];
- }
- if (api_get_setting('display_coursecode_in_courselist') == 'true' && api_get_setting('display_teacher_in_courselist') == 'true') {
- echo ' - ';
- }
- if (api_get_setting('display_teacher_in_courselist') == 'true') {
- echo $course['tutor'];
- }
- echo ' ';
- echo Display::return_icon('klipper.png', get_lang('CourseAutoRegister'));
- // Show notifications.
- echo $show_notification;
- echo '</div>';
- $key++;
- }
- }
- }
- }
- /**
- * Display courses (without special courses) as several HTML divs
- * of course categories, as class userportal-catalog-item.
- * @uses display_courses_in_category() to display the courses themselves
- * @param int user id
- * @param bool Whether to show the document quick-loader or not
- * @return void
- */
- function display_courses($user_id, $load_dirs = false) {
-
- global $_user, $_configuration;
-
- // Building an array that contains all the id's of the user defined course categories.
- // Initially this was inside the display_courses_in_category function but when we do it here we have fewer
- // sql executions = performance increase.
- $all_user_categories = self :: get_user_course_categories();
-
- // Step 0: We display the course without a user category.
- self :: display_courses_in_category(0, $load_dirs);
-
- // Step 1: We get all the categories of the user.
- $tucc = Database::get_user_personal_table(TABLE_USER_COURSE_CATEGORY);
- $sql = "SELECT id, title FROM $tucc WHERE user_id='".$_user['user_id']."' ORDER BY sort ASC";
- $result = Database::query($sql);
- while ($row = Database::fetch_array($result)) {
- // We simply display the title of the category.
- echo '<div class="userportal-catalog-item">';
- echo '<ul class="catalog_box">';
- echo '<li>';
- echo Display::return_icon('folder_yellow.png', get_lang('Category'), array('width' => '48px', 'align' => 'absmiddle'));
- echo '<span>';
- echo '<a name="category'.$row['id'].'"></a>'; // Display an internal anchor.
- echo $row['title'];
- echo '</span>';
- echo '</li>';
- self :: display_courses_in_category($row['id'], $load_dirs);
- echo '</ul>';
- echo '</div>';
- }
- }
- /**
- * Display courses inside a category (without special courses) as HTML dics of
- * class userportal-course-item.
- * @param int User category id
- * @param bool Whether to show the document quick-loader or not
- * @return void
- */
- function display_courses_in_category($user_category_id, $load_dirs = false) {
-
- global $_user;
- // Table definitions
- $TABLECOURS = Database :: get_main_table(TABLE_MAIN_COURSE);
- $TABLECOURSUSER = Database :: get_main_table(TABLE_MAIN_COURSE_USER);
- $TABLE_ACCESS_URL_REL_COURSE = Database :: get_main_table(TABLE_MAIN_ACCESS_URL_REL_COURSE);
- $TABLE_USER_COURSE_CATEGORY = Database :: get_user_personal_table(TABLE_USER_COURSE_CATEGORY);
- $current_url_id = api_get_current_access_url_id();
-
- // Get course list auto-register
- $special_course_list = self::get_special_course_list();
-
- $without_special_courses = '';
- if (!empty($special_course_list)) {
- $without_special_courses = ' AND course.code NOT IN ("'.implode('","',$special_course_list).'")';
- }
-
- $sql_select_courses = "SELECT course.id, course.code, course.visual_code, course.subscribe subscr, course.unsubscribe unsubscr,
- course.title title, course.tutor_name tutor, course.db_name, course.directory, course_rel_user.status status,
- course_rel_user.sort sort, course_rel_user.user_course_cat user_course_cat, course.visibility
- FROM $TABLECOURS course,
- $TABLECOURSUSER course_rel_user, ".$TABLE_ACCESS_URL_REL_COURSE." url
- WHERE course.code = course_rel_user.course_code AND url.course_code = course.code
- AND course_rel_user.user_id = '".$_user['user_id']."'
- AND course_rel_user.relation_type<>".COURSE_RELATION_TYPE_RRHH."
- AND course_rel_user.user_course_cat='".$user_category_id."' $without_special_courses ";
- // If multiple URL access mode is enabled, only fetch courses
- // corresponding to the current URL.
- if (api_get_multiple_access_url() && $current_url_id != -1){
- $sql_select_courses .= " AND url.course_code=course.code AND access_url_id='".$current_url_id."'";
- }
- // Use user's classification for courses (if any).
- $sql_select_courses .= " ORDER BY course_rel_user.user_course_cat, course_rel_user.sort ASC";
- $result = Database::query($sql_select_courses);
- $number_of_courses = Database::num_rows($result);
- $key = 0;
- $status_icon = '';
-
- // Browse through all courses.
- while ($course = Database::fetch_array($result)) {
- // Get notifications.
- $my_course = array();
- $my_course['db'] = $course['db_name'];
- $my_course['k'] = $course['code'];
- $my_course['id_session'] = null;
- $my_course['s'] = $course['status'];
- // For each course, get if there is any notification icon to show
- // (something that would have changed since the user's last visit).
- $show_notification = Display :: show_notification($my_course);
- // New code displaying the user's status in respect to this course.
- $status_icon = Display::return_icon('blackboard.png', get_lang('Course'), array('width' => '48px'));
-
- echo '<div class="userportal-course-item">';
-
- if (api_is_platform_admin()) {
- echo '<div style="float:right;">';
-
- if ($load_dirs) {
- echo '<a id="document_preview_'.$course['id'].'_0" class="document_preview" href="javascript:void(0);">'.Display::return_icon('folder.png', get_lang('Documents'), array('align' => 'absmiddle'),22).'</a>';
- echo '<a href="'.api_get_path(WEB_CODE_PATH).'course_info/infocours.php?cidReq='.$course['code'].'">'.Display::return_icon('edit.png', get_lang('Edit'), array('align' => 'absmiddle'),22).'</a>';
- echo Display::div('', array('id' => 'document_result_'.$course['id'].'_0', 'class'=>'document_preview_container'));
- } else {
- echo '<a href="'.api_get_path(WEB_CODE_PATH).'course_info/infocours.php?cidReq='.$course['code'].'">'.Display::return_icon('edit.png', get_lang('Edit'), array('align' => 'absmiddle'),22).'</a>';
- }
-
- if ($course['status'] == COURSEMANAGER) {
- //echo Display::return_icon('teachers.gif', get_lang('Status').': '.get_lang('Teacher'), array('style'=>'width: 11px; height: 11px;'));
- }
- echo '</div>';
- } else {
- echo '<div style="float:right;">';
- if ($load_dirs) {
- echo '<a id="document_preview_'.$course['id'].'_0" class="document_preview" href="javascript:void(0);">'.Display::return_icon('folder.png', get_lang('Documents'), array('align' => 'absmiddle'),22).'</a>';
- echo Display::div('', array('id' => 'document_result_'.$course['id'].'_0', 'class'=>'document_preview_container'));
- }
- echo '</div>';
-
- }
-
- // Function logic - act on the data (check if the course is virtual, if yes change the link).
- $is_virtual_course = CourseManager :: is_virtual_course_from_system_code($course['code']);
- if ($is_virtual_course) {
- // If the current user is also subscribed in the real course to which this
- // virtual course is linked, we don't need to display the virtual course entry in
- // the course list - it is combined with the real course entry.
- $target_course_code = CourseManager :: get_target_of_linked_course($course['code']);
- $is_subscribed_in_target_course = CourseManager :: is_user_subscribed_in_course(api_get_user_id(), $target_course_code);
- if ($is_subscribed_in_target_course) {
- return; // Do not display this course entry.
- }
- }
- // Check if the course has virtual courses attached. If yes change the course title and display code.
- $has_virtual_courses = CourseManager :: has_virtual_courses_from_code($course['code'], api_get_user_id());
- if ($has_virtual_courses) {
- $course_info = api_get_course_info($course['code']);
- $return_result = CourseManager :: determine_course_title_from_course_info(api_get_user_id(), $course_info);
- $course_title = $return_result['title'];
- $course_display_code = $return_result['code'];
- } else {
- $course_title = $course['title'];
- $course_display_code = $course['visual_code'];
- }
-
- // Show a hyperlink to the course, unless the course is closed and user is not course admin.
- $course_visibility = $course['visibility'];
- $course_title_url = '';
- if ($course_visibility != COURSE_VISIBILITY_CLOSED || $course['status'] == COURSEMANAGER) {
- $course_title_url = api_get_path(WEB_COURSE_PATH).$course['directory'].'/?id_session=0';
- $course_title = Display::url($course['title'], $course_title_url);
-
- } else {
- $course_title = $course['title']." ".Display::tag('span',get_lang('CourseClosed'), array('class'=>'item_closed'));
- }
- if (!empty($course_title_url)) {
- $status_icon = Display::url($status_icon, $course_title_url);
- }
- // Start displaying the course block itself.
- echo '<div style="float: left; margin-right: 10px;">'.$status_icon.'</div><span class="userportal-course-item-title">'.$course_title.'</span><br />';
-
- if (api_get_setting('display_coursecode_in_courselist') == 'true') {
- echo $course_display_code;
- }
- if (api_get_setting('display_coursecode_in_courselist') == 'true' && api_get_setting('display_teacher_in_courselist') == 'true') {
- echo ' - ';
- }
- if (api_get_setting('display_teacher_in_courselist') == 'true') {
- if (!empty($course['tutor']))
- echo $course['tutor'];
- }
- // Show notifications.
- echo $show_notification;
- echo '</div>';
- $key++;
- }
- }
- /**
- * Retrieves the user defined course categories
- * @author Patrick Cool <patrick.cool@UGent.be>, Ghent University
- * @return array containing all the titles of the user defined courses with the id as key of the array
- */
- function get_user_course_categories() {
- global $_user;
- $output = array();
- $table_category = Database::get_user_personal_table(TABLE_USER_COURSE_CATEGORY);
- $sql = "SELECT * FROM ".$table_category." WHERE user_id='".Database::escape_string($_user['user_id'])."'";
- $result = Database::query($sql);
- while ($row = Database::fetch_array($result)) {
- $output[$row['id']] = $row['title'];
- }
- return $output;
- }
- /**
- * Get the course id based on the original id and field name in the extra fields. Returns 0 if course was not found
- *
- * @param string Original course id
- * @param string Original field name
- * @return int Course id
- */
- public static function get_course_id_from_original_id($original_course_id_value, $original_course_id_name) {
- $t_cfv = Database::get_main_table(TABLE_MAIN_COURSE_FIELD_VALUES);
- $table_field = Database::get_main_table(TABLE_MAIN_COURSE_FIELD);
- $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'";
- $res = Database::query($sql_course);
- $row = Database::fetch_object($res);
- if($row != false) {
- return $row->id;
- } else {
- return 0;
- }
- }
- /**
- * Display code for one specific course a logged in user is subscribed to.
- * Shows a link to the course, what's new icons...
- *
- * $my_course['d'] - course directory
- * $my_course['i'] - course title
- * $my_course['c'] - visual course code
- * $my_course['k'] - system course code
- * $my_course['db'] - course database
- *
- * @param array Course details
- * @param integer Session ID
- * @param string CSS class to apply to course entry
- * @param boolean Whether the session is supposedly accessible now (not in the case it has passed and is in invisible/unaccessible mode)
- * @param bool Whether to show the document quick-loader or not
- * @return string The HTML to be printed for the course entry
- *
- * @version 1.0.3
- * @todo refactor into different functions for database calls | logic | display
- * @todo replace single-character $my_course['d'] indices
- * @todo move code for what's new icons to a separate function to clear things up
- * @todo add a parameter user_id so that it is possible to show the courselist of other users (=generalisation). This will prevent having to write a new function for this.
- */
- function get_logged_user_course_html($course, $session_id = 0, $class = 'courses', $session_accessible = true, $load_dirs = false) {
- global $nosession, $nbDigestEntries, $digest, $thisCourseSysCode, $orderKey;
- $charset = api_get_system_encoding();
-
- $current_uid = api_get_user_id();
- $info = api_get_course_info($course['code']);
- $status_course = CourseManager::get_user_in_course_status($current_uid, $course['code']);
-
- if (!is_array($course['code'])) {
- $my_course = api_get_course_info($course['code']);
- $my_course['k'] = $my_course['id'];
- $my_course['db'] = $my_course['dbName'];
- $my_course['c'] = $my_course['official_code'];
- $my_course['i'] = $my_course['name'];
- $my_course['d'] = $my_course['path'];
- $my_course['t'] = $my_course['titular'];
- $my_course['id_session'] = $session_id;
- $my_course['status'] = empty($session_id) ? $status_course : 5;
- }
-
- if (api_get_setting('use_session_mode') == 'true' && !$nosession) {
- global $now, $date_start, $date_end;
- }
-
- // Initialise.
- $result = '';
-
- // Table definitions
- $main_user_table = Database :: get_main_table(TABLE_MAIN_USER);
- $tbl_session = Database :: get_main_table(TABLE_MAIN_SESSION);
- $tbl_session_category = Database :: get_main_table(TABLE_MAIN_SESSION_CATEGORY);
-
- $user_id = api_get_user_id();
- $course_system_code = $my_course['k'];
- $course_visual_code = $my_course['c'];
- $course_title = $my_course['i'];
- $course_directory = $my_course['d'];
- $course_teacher = $my_course['t'];
- $course_teacher_email = isset($my_course['email']) ? $my_course['email'] : '';
- $course_info = Database :: get_course_info($course_system_code);
- $course_access_settings = CourseManager :: get_access_settings($course_system_code);
- $course_id = isset($course_info['course_id']) ? $course_info['course_id'] : null;
- $course_visibility = $course_access_settings['visibility'];
-
- $user_in_course_status = CourseManager :: get_user_in_course_status(api_get_user_id(), $course_system_code);
-
- // Function logic - act on the data.
- $is_virtual_course = CourseManager :: is_virtual_course_from_system_code($my_course['k']);
- if ($is_virtual_course) {
- // If the current user is also subscribed in the real course to which this
- // virtual course is linked, we don't need to display the virtual course entry in
- // the course list - it is combined with the real course entry.
- $target_course_code = CourseManager :: get_target_of_linked_course($course_system_code);
- $is_subscribed_in_target_course = CourseManager :: is_user_subscribed_in_course(api_get_user_id(), $target_course_code);
- if ($is_subscribed_in_target_course) {
- return; //do not display this course entry
- }
- }
- $has_virtual_courses = CourseManager :: has_virtual_courses_from_code($course_system_code, api_get_user_id());
- if ($has_virtual_courses) {
- $return_result = CourseManager :: determine_course_title_from_course_info(api_get_user_id(), $course_info);
- $course_display_title = $return_result['title'];
- $course_display_code = $return_result['code'];
- } else {
- $course_display_title = $course_title;
- $course_display_code = $course_visual_code;
- }
-
- $s_course_status = $my_course['status'];
- $is_coach = api_is_coach($my_course['id_session'], $course['code']);
-
- $s_htlm_status_icon = Display::return_icon('blackboard_blue.png', get_lang('Course'), array('width' => '48px'));
-
- // Display course entry.
- // Show a hyperlink to the course, unless the course is closed and user is not course admin.
- $session_url = '';
- $session_title = '';
- if ($session_accessible) {
- if ($course_visibility != COURSE_VISIBILITY_CLOSED || $user_in_course_status == COURSEMANAGER) {
- if (api_get_setting('use_session_mode') == 'true' && !$nosession) {
- if (empty($my_course['id_session'])) {
- $my_course['id_session'] = 0;
- }
- if ($user_in_course_status == COURSEMANAGER || ($date_start <= $now && $date_end >= $now) || $date_start == '0000-00-00') {
- $session_url = api_get_path(WEB_COURSE_PATH).$course_directory.'/?id_session='.$my_course['id_session'];
- $session_title = '<a href="'.api_get_path(WEB_COURSE_PATH).$course_directory.'/?id_session='.$my_course['id_session'].'">'.$course_display_title.'</a>';
- }
- } else {
- $session_url = api_get_path(WEB_COURSE_PATH).$course_directory.'/';
- $session_title = '<a href="'.api_get_path(WEB_COURSE_PATH).$course_directory.'/">'.$course_display_title.'</a>';
- }
- } else {
- $session_title = $course_display_title.' '.Display::tag('span',get_lang('CourseClosed'), array('class'=>'item_closed'));
- }
- } else {
- $session_title = $course_display_title;
- }
-
- if (!empty($session_url)) {
- $s_htlm_status_icon = Display::url($s_htlm_status_icon, $session_url);
- }
-
- $result .= '<li class="'.$class.'"><div class="coursestatusicons">'.$s_htlm_status_icon.'</div>';
- $result .= $session_title;
-
-
- if ($load_dirs) {
- $result .= '<div style="float:right;">';
- $result .= '<a id="document_preview_'.$info['real_id'].'_'.$my_course['id_session'].'" class="document_preview" href="javascript:void(0);">'.Display::return_icon('folder.png', get_lang('Documents'), array('align' => 'absmiddle'),22).'</a>';
- $result .= Display::div('', array('id' => 'document_result_'.$info['real_id'].'_'.$my_course['id_session'], 'class'=>'document_preview_container'));
- $result .= '</div>';
- }
-
-
- // Show the course_code and teacher if chosen to display this.
- if (api_get_setting('display_coursecode_in_courselist') == 'true' || api_get_setting('display_teacher_in_courselist') == 'true') {
- $result .= '<br />';
- }
-
- if (api_get_setting('display_coursecode_in_courselist') == 'true') {
- $result .= $course_display_code;
- }
-
- if (api_get_setting('display_teacher_in_courselist') == 'true') {
- if (api_get_setting('use_session_mode')=='true' && !$nosession) {
- $coachs_course = api_get_coachs_from_course($my_course['id_session'], $course['code']);
- $course_coachs = array();
- if (is_array($coachs_course)) {
- foreach ($coachs_course as $coach_course) {
- $course_coachs[] = api_get_person_name($coach_course['firstname'], $coach_course['lastname']);
- }
- }
-
- if ($s_course_status == 1 || ($s_course_status == 5 && empty($my_course['id_session'])) || empty($s_course_status)) {
- $result .= $course_teacher;
- }
-
- if (($s_course_status == 5 && !empty($my_course['id_session'])) || ($is_coach && $s_course_status != 1)) {
- if (is_array($course_coachs) && count($course_coachs)> 0 ) {
- if (api_get_setting('display_coursecode_in_courselist') == 'true' && api_get_setting('display_teacher_in_courselist') == 'true') {
- $result .= ' – ';
- }
- $result .= get_lang('Coachs').': '.implode(', ',$course_coachs);
- }
- }
-
- } else {
- $result .= $course_teacher;
- }
-
- if(!empty($course_teacher_email)) {
- $result .= ' ('.$course_teacher_email.')';
- }
- }
-
- $result .= isset($course['special_course']) ? ' '.Display::return_icon('klipper.png', get_lang('CourseAutoRegister')) : '';
-
- $current_course_settings = CourseManager :: get_access_settings($my_course['k']);
-
- // Display the "what's new" icons.
- $result .= Display :: show_notification($my_course);
-
- if ((CONFVAL_showExtractInfo == SCRIPTVAL_InCourseList || CONFVAL_showExtractInfo == SCRIPTVAL_Both) && $nbDigestEntries > 0) {
-
- reset($digest);
- $result .= '
- <ul>';
- while (list($key2) = each($digest[$thisCourseSysCode])) {
- $result .= '<li>';
- if ($orderKey[1] == 'keyTools') {
- $result .= "<a href=\"$toolsList[$key2] [\"path\"] $thisCourseSysCode \">";
- $result .= "$toolsList[$key2][\"name\"]</a>";
- } else {
- $result .= api_convert_and_format_date($key2, DATE_FORMAT_LONG, date_default_timezone_get());
- }
- $result .= '</li>';
- $result .= '<ul>';
- reset ($digest[$thisCourseSysCode][$key2]);
- while (list ($key3, $dataFromCourse) = each($digest[$thisCourseSysCode][$key2])) {
- $result .= '<li>';
- if ($orderKey[2] == 'keyTools') {
- $result .= "<a href=\"$toolsList[$key3] [\"path\"] $thisCourseSysCode \">";
- $result .= "$toolsList[$key3][\"name\"]</a>";
- } else {
- $result .= api_convert_and_format_date($key3, DATE_FORMAT_LONG, date_default_timezone_get());
- }
- $result .= '<ul compact="compact">';
- reset($digest[$thisCourseSysCode][$key2][$key3]);
- while (list ($key4, $dataFromCourse) = each($digest[$thisCourseSysCode][$key2][$key3])) {
- $result .= '<li>';
- $result .= @htmlspecialchars(api_substr(strip_tags($dataFromCourse), 0, CONFVAL_NB_CHAR_FROM_CONTENT), ENT_QUOTES, $charset);
- $result .= '</li>';
- }
- $result .= '</ul>';
- $result .= '</li>';
- }
- $result .= '</ul>';
- $result .= '</li>';
- }
- $result .= '</ul>';
- }
- $result .= '</li>';
- $session_category_id = null;
- if (api_get_setting('use_session_mode') == 'true' && !$nosession) {
- $session = '';
- $active = false;
- if (!empty($my_course['session_name'])) {
-
- // Request for the name of the general coach
- $sql = 'SELECT lastname, firstname,sc.name
- FROM '.$tbl_session.' ts
- LEFT JOIN '.$main_user_table .' tu
- ON ts.id_coach = tu.user_id
- INNER JOIN '.$tbl_session_category.' sc ON ts.session_category_id = sc.id
- WHERE ts.id='.(int) $my_course['id_session']. ' LIMIT 1';
-
- $rs = Database::query($sql);
- $sessioncoach = Database::store_result($rs);
- $sessioncoach = $sessioncoach[0];
-
- $session = array();
- $session['title'] = $my_course['session_name'];
- $session_category_id = CourseManager::get_session_category_id_by_session_id($my_course['id_session']);
- $session['category'] = $sessioncoach['name'];
- if ($my_course['date_start'] == '0000-00-00') {
- //$session['dates'] = get_lang('WithoutTimeLimits');
- $session['dates'] = '';
- if (api_get_setting('show_session_coach') === 'true') {
- $session['coach'] = get_lang('GeneralCoach').': '.api_get_person_name($sessioncoach['firstname'], $sessioncoach['lastname']);
- }
- $active = true;
- } else {
- $session ['dates'] = ' - '.get_lang('From').' '.$my_course['date_start'].' '.get_lang('To').' '.$my_course['date_end'];
- if (api_get_setting('show_session_coach') === 'true') {
- $session['coach'] = get_lang('GeneralCoach').': '.api_get_person_name($sessioncoach['firstname'], $sessioncoach['lastname']);
- }
- $active = ($date_start <= $now && $date_end >= $now);
- }
- }
- $user_course_category = '';
- if (isset($my_course['user_course_cat'])) {
- $user_course_category = $my_course['user_course_cat'];
- }
- $output = array ($user_course_category, $result, $my_course['id_session'], $session, 'active' => $active, 'session_category_id' => $session_category_id);
- } else {
- $output = array ($my_course['user_course_cat'], $result);
- }
-
- return $output;
- }
-
- /**
- *
- * @param string source course code
- * @param int source session id
- * @param string destination course code
- * @param int destination session id
- * @return bool
- */
- function copy_course($source_course_code, $source_session_id, $destination_course_code, $destination_session_id, $params = array()) {
- require_once api_get_path(SYS_CODE_PATH).'coursecopy/classes/CourseBuilder.class.php';
- require_once api_get_path(SYS_CODE_PATH).'coursecopy/classes/CourseRestorer.class.php';
- require_once api_get_path(SYS_CODE_PATH).'coursecopy/classes/CourseSelectForm.class.php';
- $course_info = api_get_course_info($source_course_code);
-
- if (!empty($course_info)) {
- $cb = new CourseBuilder('', $course_info);
- $course = $cb->build($source_session_id, $source_course_code, true);
- $course_restorer = new CourseRestorer($course);
- $course_restorer->skip_content = $params;
- $course_restorer->restore($destination_course_code, $destination_session_id, true, true);
- return true;
- }
- return false;
- }
-
-
- /**
- * A simpler version of the copy_course, the function creates an empty course with an autogenerated course code
- *
- * @param string new course title
- * @param string source course code
- * @param int source session id
- * @param int destination session id
- * @param bool new copied tools (Exercises and LPs)will be set to invisible by default?
- *
- * @return array
- */
- function copy_course_simple($new_title, $source_course_code, $source_session_id = 0, $destination_session_id = 0, $params = array()) {
- $source_course_info = api_get_course_info($source_course_code);
- if (!empty($source_course_info)) {
- $new_course_code = self::generate_nice_next_course_code($source_course_code);
- if ($new_course_code) {
- $new_course_info = self::create_course($new_title, $new_course_code, false);
- if (!empty($new_course_info['code'])) {
- $result = self::copy_course($source_course_code, $source_session_id, $new_course_info['code'], $destination_session_id, $params);
- if ($result) {
- return $new_course_info;
- }
- }
- }
- }
- return false;
- }
-
-
-
- /**
- * Creates a new course code based in given code
- *
- * @param string wanted code
- * <code> $wanted_code = 'curse' if there are in the DB codes like curse1 curse2 the function will return: course3</code>
- * if the course code doest not exist in the DB the same course code will be returned
- * @return string wanted unused code
- */
- function generate_nice_next_course_code($wanted_code) {
- require_once api_get_path(LIBRARY_PATH).'add_course.lib.inc.php';
- $course_code_ok = !self::course_code_exists($wanted_code);
- if (!$course_code_ok) {
- $wanted_code = generate_course_code($wanted_code);
- $table = Database::get_main_table(TABLE_MAIN_COURSE);
- $wanted_code = Database::escape_string($wanted_code);
- $sql = "SELECT count(*) as count FROM $table WHERE code LIKE '$wanted_code%'";
- $result = Database::query($sql);
- if (Database::num_rows($result) > 0 ) {
- $row = Database::fetch_array($result);
- $count = $row['count'] + 1;
- $wanted_code = $wanted_code.'_'.$count;
- $result = api_get_course_info($wanted_code);
- if (empty($result)) {
- return $wanted_code;
- }
- }
- return false;
- }
- return $wanted_code;
- }
-
-
- function is_user_accepted_legal($user_id, $course_code, $session_id = null) {
- $user_id = intval($user_id);
- $course_code = Database::escape_string($course_code);
- $session_id = intval($session_id);
- if (empty($session_id)) {
- $table = Database::get_main_table(TABLE_MAIN_COURSE_USER);
- $sql = "SELECT legal_agreement FROM $table
- WHERE user_id = $user_id AND course_code ='$course_code' ";
- $result = Database::query($sql);
- if (Database::num_rows($result) > 0 ) {
- $result = Database::fetch_array($result);
- if ($result['legal_agreement'] == 1 ) {
- return true;
- }
- }
- return false;
- } else {
- $table = Database::get_main_table(TABLE_MAIN_SESSION_COURSE_USER);
- $sql = "SELECT legal_agreement FROM $table
- WHERE id_user = $user_id AND course_code ='$course_code' AND id_session = $session_id";
- $result = Database::query($sql);
- if (Database::num_rows($result) > 0 ) {
- $result = Database::fetch_array($result);
- if ($result['legal_agreement'] == 1 ) {
- return true;
- }
- }
- return false;
- }
- return false;
- }
-
- function save_user_legal($user_id, $course_code, $session_id = null) {
-
- $user_id = intval($user_id);
- $course_code = Database::escape_string($course_code);
- $session_id = intval($session_id);
- if (empty($session_id)) {
- $table = Database::get_main_table(TABLE_MAIN_COURSE_USER);
- $sql = "UPDATE $table SET legal_agreement = '1'
- WHERE user_id = $user_id AND course_code ='$course_code' ";
- $result = Database::query($sql);
- } else {
- $table = Database::get_main_table(TABLE_MAIN_SESSION_COURSE_USER);
- $sql = "UPDATE $table SET legal_agreement = '1'
- WHERE id_user = $user_id AND course_code = '$course_code' AND id_session = $session_id";
- $result = Database::query($sql);
- }
- }
-
- public function get_user_course_vote($user_id, $course_id, $session_id = null, $url_id = null) {
- $table_user_course_vote = Database::get_main_table(TABLE_MAIN_USER_REL_COURSE_VOTE);
-
- $session_id = !isset($session_id) ? api_get_session_id() : intval($session_id);
- $url_id = empty($url_id) ? api_get_current_access_url_id() : intval($url_id);
-
- $user_id = intval($user_id);
-
- if (empty($user_id)) {
- return false;
- }
-
- $params = array(
- 'user_id' => $user_id,
- 'c_id' => $course_id,
- 'session_id' => $session_id,
- 'url_id' => $url_id
- );
-
- $result = Database::select('vote', $table_user_course_vote, array('where' => array('user_id = ? AND c_id = ? AND session_id = ? AND url_id = ?' => $params)), 'first');
- if (!empty($result)) {
- return $result['vote'];
- }
- return false;
- }
-
- public function get_course_ranking($course_id, $session_id = null, $url_id = null) {
- $table_course_ranking = Database::get_main_table(TABLE_STATISTIC_TRACK_COURSE_RANKING);
-
- $session_id = !isset($session_id) ? api_get_session_id() : intval($session_id);
- $url_id = empty($url_id) ? api_get_current_access_url_id() : intval($url_id);
-
- $params = array(
- 'c_id' => $course_id,
- 'session_id' => $session_id,
- 'url_id' => $url_id,
- 'creation_date' => $now,
- );
- $result = Database::select('c_id, accesses, total_score, users', $table_course_ranking, array('where' => array('c_id = ? AND session_id = ? AND url_id = ?' => $params)), 'first');
-
- $point_average_in_percentage = 0;
- $point_average_in_star = 0;
- $users_who_voted = 0;
-
- if (!empty($result['users'])) {
- $users_who_voted = $result['users'];
- $point_average_in_percentage = round($result['total_score']/$result['users'] * 100 / 5, 2);
- $point_average_in_star = round($result['total_score']/$result['users'], 1);
- }
-
- $result['user_vote'] = false;
-
- if (!api_is_anonymous()) {
- $result['user_vote'] = self::get_user_course_vote(api_get_user_id(), $course_id, $session_id,$url_id);
- }
-
- $result['point_average'] = $point_average_in_percentage;
- $result['point_average_star'] = $point_average_in_star;
- $result['users_who_voted'] = $users_who_voted;
- return $result;
- }
-
- /**
- *
- * Updates the course ranking
- * @param int course id
- * @param int session id
- * @param id url id
- *
- **/
- public static function update_course_ranking($course_id = null, $session_id = null, $url_id = null, $points_to_add = null, $add_access = true, $add_user = true) {
- //Course catalog stats modifications see #4191
- $table_course_ranking = Database::get_main_table(TABLE_STATISTIC_TRACK_COURSE_RANKING);
-
- $now = api_get_utc_datetime();
-
- $course_id = empty($course_id) ? api_get_course_int_id() : intval($course_id);
- $session_id = !isset($session_id) ? api_get_session_id() : intval($session_id);
- $url_id = empty($url_id) ? api_get_current_access_url_id() : intval($url_id);
-
- $params = array(
- 'c_id' => $course_id,
- 'session_id' => $session_id,
- 'url_id' => $url_id,
- 'creation_date' => $now,
- );
-
- $result = Database::select('id, accesses, total_score, users', $table_course_ranking, array('where' => array('c_id = ? AND session_id = ? AND url_id = ?' => $params)), 'first');
-
- // Problem here every thime we load the courses/XXXX/index.php course home page we update the access
-
- if (empty($result)) {
- if ($add_access) {
- $params['accesses'] = 1;
- }
- //The votes and users are empty
- if (isset($points_to_add) && !empty($points_to_add)) {
- $params['total_score'] = intval($points_to_add);
- }
- if ($add_user) {
- $params['users'] = 1;
- }
- $result = Database::insert($table_course_ranking, $params);
- } else {
- $my_params = array();
-
- if ($add_access) {
- $my_params['accesses'] = intval($result['accesses']) + 1;
- }
- if (isset($points_to_add) && !empty($points_to_add)) {
- $my_params['total_score'] = $result['total_score'] + $points_to_add;
- }
- if ($add_user) {
- $my_params['users'] = $result['users'] + 1;
- }
- if (!empty($my_params)) {
- $result = Database::update($table_course_ranking, $my_params, array('c_id = ? AND session_id = ? AND url_id = ?' => $params));
- }
- }
- return $result;
- }
- /**
- * Add user vote to a course
- *
- * @param int user id
- * @param int vote [1..5]
- * @param int course id
- * @param int session id
- * @param int url id
- * @return mixed 'added', 'updated' or 'nothing'
- *
- */
-
- public function add_course_vote($user_id, $vote, $course_id, $session_id = null, $url_id = null) {
- $table_user_course_vote = Database::get_main_table(TABLE_MAIN_USER_REL_COURSE_VOTE);
- $course_id = empty($course_id) ? api_get_course_int_id() : intval($course_id);
-
- if (empty($course_id) || empty($user_id)) {
- return false;
- }
-
- if (!in_array($vote, array(1,2,3,4,5))) {
- return false;
- }
-
- $session_id = !isset($session_id) ? api_get_session_id() : intval($session_id);
- $url_id = empty($url_id) ? api_get_current_access_url_id() : intval($url_id);
- $vote = intval($vote);
-
- $params = array(
- 'user_id' => intval($user_id),
- 'c_id' => $course_id,
- 'session_id' => $session_id,
- 'url_id' => $url_id,
- 'vote' => $vote
- );
-
- $action_done = 'nothing';
-
- $result = Database::select('id, vote', $table_user_course_vote, array('where' => array('user_id = ? AND c_id = ? AND session_id = ? AND url_id = ?' => $params)), 'first');
-
- if (empty($result)) {
- $result = Database::insert($table_user_course_vote, $params);
- $points_to_add = $vote;
- $add_user = true;
- $action_done = 'added';
- } else {
- $my_params = array('vote' => $vote);
- $points_to_add = $vote - $result['vote'];
- $add_user = false;
-
- $result = Database::update($table_user_course_vote, $my_params, array('user_id = ? AND c_id = ? AND session_id = ? AND url_id = ?' => $params));
- $action_done = 'updated';
- }
-
- //Current points
- if (!empty($points_to_add)) {
- self::update_course_ranking($course_id, $session_id, $url_id, $points_to_add, false, $add_user);
- }
- return $action_done;
- }
-
- /**
- * Remove course ranking + user votes
- *
- * @param int course id
- * @param int session id
- * @param int url id
- *
- */
- public function remove_course_ranking($course_id, $session_id, $url_id = null) {
- $table_course_ranking = Database::get_main_table(TABLE_STATISTIC_TRACK_COURSE_RANKING);
- $table_user_course_vote = Database::get_main_table(TABLE_MAIN_USER_REL_COURSE_VOTE);
- if (!empty($course_id) && isset($session_id)) {
-
- $url_id = empty($url_id) ? api_get_current_access_url_id() : intval($url_id);
- $params = array(
- 'c_id' => $course_id,
- 'session_id' => $session_id,
- 'url_id' => $url_id,
- );
- Database::delete($table_course_ranking, array('c_id = ? AND session_id = ? AND url_id = ?' => $params));
- Database::delete($table_user_course_vote, array('c_id = ? AND session_id = ? AND url_id = ?' => $params));
- }
- }
-
- //Stats functions
-
- function return_hot_courses($days = 30, $limit = 5) {
- $limit = intval($limit);
- $table_course_access = Database::get_main_table(TABLE_STATISTIC_TRACK_E_COURSE_ACCESS);
-
- //@todo all dates in the tracking_course_access, last_access are in the DB time (NOW) not UTC
- /*
- $today = api_get_utc_datetime();
- $today_diff = time() -intval($days)*24*60*60;
- $today_diff = api_get_utc_datetime($today_diff);
- * */
-
- //WHERE login_course_date <= '$today' AND login_course_date >= '$today_diff'
-
- //$table_course_access table uses the now() and interval ...
-
- $sql = "SELECT COUNT(course_access_id) course_count, course_code FROM $table_course_access
- WHERE login_course_date <= now() AND login_course_date > DATE_SUB(now(), INTERVAL $days DAY)
- GROUP BY course_code
- ORDER BY course_count DESC
- LIMIT $limit";
-
- $result = Database::query($sql);
- $courses = array();
- if (Database::num_rows($result)) {
- $courses = Database::store_result($result, 'ASSOC');
- foreach ($courses as &$my_course) {
- $course_info = api_get_course_info($my_course['course_code']);
- $my_course['extra_info'] = $course_info;
- $ajax_url = api_get_path(WEB_AJAX_PATH).'course.ajax.php?a=add_course_vote';
-
- $point_info = self::get_course_ranking($course_info['real_id'], 0);
- $my_course['extra_info']['rating_html'] = Display::return_rating_system('star_'.$course_info['real_id'], $ajax_url.'&course_id='.$course_info['real_id'], $point_info);
- }
- }
- return $courses;
- }
-
- function return_most_accessed_courses($limit = 5) {
- $table_course_ranking = Database::get_main_table(TABLE_STATISTIC_TRACK_COURSE_RANKING);
- $params['url_id'] = api_get_current_access_url_id();
-
- $result = Database::select('c_id, accesses, total_score, users', $table_course_ranking, array('where' => array('url_id = ?' => $params), 'order' => 'accesses DESC', 'limit' => $limit), 'all', true);
- return $result;
- }
- } //end class CourseManager
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