Julio Montoya
11 years ago
commit
59d92d7b55
@ -1,227 +1,227 @@ |
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<?php |
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/* For licensing terms, see /license.txt */ |
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/** |
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* This is the class library for this application. |
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* @package chamilo.library |
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* This is the static class library for this application. |
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* @package chamilo.library |
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*/ |
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/** |
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* Code |
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*/ |
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class ClassManager |
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{ |
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/** |
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* Get class information |
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* note: This function can't be named get_class() because that's a standard |
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* php-function. |
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*/ |
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function get_class_info($class_id) { |
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/** |
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* Get class information |
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* note: This function can't be named get_class() because that's a standard |
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* php-function. |
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*/ |
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public static function get_class_info($class_id) { |
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$class_id = intval($class_id); |
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$table_class = Database :: get_main_table(TABLE_MAIN_CLASS); |
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$sql = "SELECT * FROM $table_class WHERE id='".$class_id."'"; |
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$res = Database::query($sql); |
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return Database::fetch_array($res, 'ASSOC'); |
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} |
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/** |
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* Change the name of a class |
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* @param string $name The new name |
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* @param int $class_id The class id |
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*/ |
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function set_name($name, $class_id) { |
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$table_class = Database :: get_main_table(TABLE_MAIN_CLASS); |
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$sql = "SELECT * FROM $table_class WHERE id='".$class_id."'"; |
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$res = Database::query($sql); |
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return Database::fetch_array($res, 'ASSOC'); |
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} |
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/** |
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* Change the name of a class |
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* @param string $name The new name |
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* @param int $class_id The class id |
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*/ |
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public static function set_name($name, $class_id) { |
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$class_id = intval($class_id); |
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$table_class = Database :: get_main_table(TABLE_MAIN_CLASS); |
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$sql = "UPDATE $table_class SET name='".Database::escape_string($name)."' WHERE id='".$class_id."'"; |
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$res = Database::query($sql); |
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} |
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/** |
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* Create a class |
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* @param string $name |
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*/ |
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function create_class($name) { |
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$table_class = Database :: get_main_table(TABLE_MAIN_CLASS); |
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$sql = "INSERT INTO $table_class SET name='".Database::escape_string($name)."'"; |
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Database::query($sql); |
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return Database::affected_rows() == 1; |
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} |
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/** |
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* Check if a classname is allready in use |
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* @param string $name |
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*/ |
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function class_name_exists($name) { |
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$table_class = Database :: get_main_table(TABLE_MAIN_CLASS); |
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$sql = "SELECT * FROM $table_class WHERE name='".Database::escape_string($name)."'"; |
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$res = Database::query($sql); |
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return Database::num_rows($res) != 0; |
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} |
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/** |
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* Delete a class |
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* @param int $class_id |
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* @todo Add option to unsubscribe class-members from the courses where the |
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* class was subscibed to |
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*/ |
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function delete_class($class_id) { |
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$table_class = Database :: get_main_table(TABLE_MAIN_CLASS); |
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$sql = "UPDATE $table_class SET name='".Database::escape_string($name)."' WHERE id='".$class_id."'"; |
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$res = Database::query($sql); |
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} |
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/** |
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* Create a class |
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* @param string $name |
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*/ |
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public static function create_class($name) { |
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$table_class = Database :: get_main_table(TABLE_MAIN_CLASS); |
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$sql = "INSERT INTO $table_class SET name='".Database::escape_string($name)."'"; |
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Database::query($sql); |
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return Database::affected_rows() == 1; |
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} |
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/** |
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* Check if a classname is allready in use |
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* @param string $name |
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*/ |
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public static function class_name_exists($name) { |
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$table_class = Database :: get_main_table(TABLE_MAIN_CLASS); |
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$sql = "SELECT * FROM $table_class WHERE name='".Database::escape_string($name)."'"; |
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$res = Database::query($sql); |
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return Database::num_rows($res) != 0; |
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} |
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/** |
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* Delete a class |
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* @param int $class_id |
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* @todo Add option to unsubscribe class-members from the courses where the |
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* class was subscibed to |
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*/ |
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public static function delete_class($class_id) { |
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$class_id = intval($class_id); |
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$table_class = Database :: get_main_table(TABLE_MAIN_CLASS); |
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$table_class_course = Database :: get_main_table(TABLE_MAIN_COURSE_CLASS); |
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$table_class_user = Database :: get_main_table(TABLE_MAIN_CLASS_USER); |
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$sql = "DELETE FROM $table_class_user WHERE class_id = '".$class_id."'"; |
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Database::query($sql); |
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$sql = "DELETE FROM $table_class_course WHERE class_id = '".$class_id."'"; |
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Database::query($sql); |
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$sql = "DELETE FROM $table_class WHERE id = '".$class_id."'"; |
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Database::query($sql); |
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} |
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/** |
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* Get all users from a class |
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* @param int $class_id |
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* @return array |
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*/ |
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function get_users($class_id) { |
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$table_class = Database :: get_main_table(TABLE_MAIN_CLASS); |
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$table_class_course = Database :: get_main_table(TABLE_MAIN_COURSE_CLASS); |
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$table_class_user = Database :: get_main_table(TABLE_MAIN_CLASS_USER); |
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$sql = "DELETE FROM $table_class_user WHERE class_id = '".$class_id."'"; |
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Database::query($sql); |
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$sql = "DELETE FROM $table_class_course WHERE class_id = '".$class_id."'"; |
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Database::query($sql); |
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$sql = "DELETE FROM $table_class WHERE id = '".$class_id."'"; |
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Database::query($sql); |
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} |
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/** |
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* Get all users from a class |
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* @param int $class_id |
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* @return array |
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*/ |
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public static function get_users($class_id) { |
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$class_id = intval($class_id); |
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$table_class_user = Database :: get_main_table(TABLE_MAIN_CLASS_USER); |
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$table_user = Database :: get_main_table(TABLE_MAIN_USER); |
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$sql = "SELECT * FROM $table_class_user cu, $table_user u WHERE cu.class_id = '".$class_id."' AND cu.user_id = u.user_id"; |
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$res = Database::query($sql); |
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$users = array (); |
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while ($user = Database::fetch_array($res, 'ASSOC')) { |
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$users[] = $user; |
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} |
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return $users; |
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} |
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/** |
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* Add a user to a class. If the class is subscribed to a course, the new |
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* user will also be subscribed to that course. |
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* @param int $user_id The user id |
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* @param int $class_id The class id |
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*/ |
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function add_user($user_id, $class_id) { |
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$table_class_user = Database :: get_main_table(TABLE_MAIN_CLASS_USER); |
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$table_class_user = Database :: get_main_table(TABLE_MAIN_CLASS_USER); |
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$table_user = Database :: get_main_table(TABLE_MAIN_USER); |
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$sql = "SELECT * FROM $table_class_user cu, $table_user u WHERE cu.class_id = '".$class_id."' AND cu.user_id = u.user_id"; |
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$res = Database::query($sql); |
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$users = array (); |
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while ($user = Database::fetch_array($res, 'ASSOC')) { |
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$users[] = $user; |
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} |
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return $users; |
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} |
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/** |
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* Add a user to a class. If the class is subscribed to a course, the new |
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* user will also be subscribed to that course. |
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* @param int $user_id The user id |
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* @param int $class_id The class id |
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*/ |
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public static function add_user($user_id, $class_id) { |
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$table_class_user = Database :: get_main_table(TABLE_MAIN_CLASS_USER); |
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$user_id = intval($user_id); |
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$class_id = intval($class_id); |
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$sql = "INSERT IGNORE INTO $table_class_user SET user_id = '".$user_id."', class_id='".$class_id."'"; |
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Database::query($sql); |
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$courses = ClassManager :: get_courses($class_id); |
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foreach ($courses as $index => $course) { |
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CourseManager :: subscribe_user($user_id, $course['course_code']); |
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} |
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} |
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/** |
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* Unsubscribe a user from a class. If the class is also subscribed in a |
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* course, the user will be unsubscribed from that course |
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* @param int $user_id The user id |
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* @param int $class_id The class id |
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*/ |
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function unsubscribe_user($user_id, $class_id) { |
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$sql = "INSERT IGNORE INTO $table_class_user SET user_id = '".$user_id."', class_id='".$class_id."'"; |
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Database::query($sql); |
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$courses = ClassManager :: get_courses($class_id); |
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foreach ($courses as $index => $course) { |
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CourseManager :: subscribe_user($user_id, $course['course_code']); |
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} |
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} |
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/** |
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* Unsubscribe a user from a class. If the class is also subscribed in a |
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* course, the user will be unsubscribed from that course |
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* @param int $user_id The user id |
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* @param int $class_id The class id |
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*/ |
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public static function unsubscribe_user($user_id, $class_id) { |
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$class_id = intval($class_id); |
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$user_id = intval($user_id); |
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|
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$table_class_user = Database :: get_main_table(TABLE_MAIN_CLASS_USER); |
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$table_course_class = Database :: get_main_table(TABLE_MAIN_COURSE_CLASS); |
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$courses = ClassManager :: get_courses($class_id); |
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if (count($courses) != 0) { |
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$course_codes = array (); |
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foreach ($courses as $index => $course) { |
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$course_codes[] = $course['course_code']; |
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$sql = "SELECT DISTINCT user_id FROM $table_class_user t1, $table_course_class t2 WHERE t1.class_id=t2.class_id AND course_code = '".$course['course_code']."' AND user_id = $user_id AND t2.class_id<>'$class_id'"; |
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$res = Database::query($sql); |
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if (Database::num_rows($res) == 0 && CourseManager :: get_user_in_course_status($user_id, $course['course_code']) == STUDENT) |
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{ |
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CourseManager :: unsubscribe_user($user_id, $course['course_code']); |
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} |
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} |
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} |
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$sql = "DELETE FROM $table_class_user WHERE user_id='".$user_id."' AND class_id = '".$class_id."'"; |
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Database::query($sql); |
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} |
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/** |
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* Get all courses in which a class is subscribed |
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* @param int $class_id |
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* @return array |
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*/ |
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function get_courses($class_id) { |
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$table_class_user = Database :: get_main_table(TABLE_MAIN_CLASS_USER); |
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$table_course_class = Database :: get_main_table(TABLE_MAIN_COURSE_CLASS); |
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$courses = ClassManager :: get_courses($class_id); |
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if (count($courses) != 0) { |
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$course_codes = array (); |
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foreach ($courses as $index => $course) { |
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$course_codes[] = $course['course_code']; |
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$sql = "SELECT DISTINCT user_id FROM $table_class_user t1, $table_course_class t2 WHERE t1.class_id=t2.class_id AND course_code = '".$course['course_code']."' AND user_id = $user_id AND t2.class_id<>'$class_id'"; |
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$res = Database::query($sql); |
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if (Database::num_rows($res) == 0 && CourseManager :: get_user_in_course_status($user_id, $course['course_code']) == STUDENT) |
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{ |
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CourseManager :: unsubscribe_user($user_id, $course['course_code']); |
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} |
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} |
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} |
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$sql = "DELETE FROM $table_class_user WHERE user_id='".$user_id."' AND class_id = '".$class_id."'"; |
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Database::query($sql); |
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} |
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/** |
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* Get all courses in which a class is subscribed |
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* @param int $class_id |
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* @return array |
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*/ |
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public static function get_courses($class_id) { |
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$class_id = intval($class_id); |
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$table_class_course = Database :: get_main_table(TABLE_MAIN_COURSE_CLASS); |
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$table_course = Database :: get_main_table(TABLE_MAIN_COURSE); |
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$sql = "SELECT * FROM $table_class_course cc, $table_course c WHERE cc.class_id = '".$class_id."' AND cc.course_code = c.code"; |
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$res = Database::query($sql); |
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$courses = array (); |
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while ($course = Database::fetch_array($res, 'ASSOC')) { |
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$courses[] = $course; |
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} |
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return $courses; |
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} |
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/** |
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* Subscribe all members of a class to a course |
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* @param int $class_id The class id |
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* @param string $course_code The course code |
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*/ |
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function subscribe_to_course($class_id, $course_code) { |
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$tbl_course_class = Database :: get_main_table(TABLE_MAIN_COURSE_CLASS); |
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$tbl_class_user = Database :: get_main_table(TABLE_MAIN_CLASS_USER); |
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$tbl_course_user = Database :: get_main_table(TABLE_MAIN_COURSE_USER); |
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$sql = "INSERT IGNORE INTO $tbl_course_class SET course_code = '".Database::escape_string($course_code)."', class_id = '".Database::escape_string($class_id)."'"; |
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Database::query($sql); |
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$sql = "SELECT user_id FROM $tbl_class_user WHERE class_id = '".Database::escape_string($class_id)."'"; |
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$res = Database::query($sql); |
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while ($user = Database::fetch_object($res)) { |
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CourseManager :: subscribe_user($user->user_id, $course_code); |
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} |
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} |
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/** |
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* Unsubscribe a class from a course. |
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* Only students are unsubscribed. If a user is member of 2 classes which |
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* are both subscribed to the course, the user stays in the course. |
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* @param int $class_id The class id |
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* @param string $course_code The course code |
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*/ |
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function unsubscribe_from_course($class_id, $course_code) |
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{ |
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$tbl_course_class = Database :: get_main_table(TABLE_MAIN_COURSE_CLASS); |
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$tbl_class_user = Database :: get_main_table(TABLE_MAIN_CLASS_USER); |
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$sql = "SELECT cu.user_id,COUNT(cc.class_id) FROM $tbl_course_class cc, $tbl_class_user cu WHERE cc.class_id = cu.class_id AND cc.course_code = '".Database::escape_string($course_code)."' GROUP BY cu.user_id HAVING COUNT(cc.class_id) = 1"; |
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$single_class_users = Database::query($sql); |
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while ($single_class_user = Database::fetch_object($single_class_users)) |
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{ |
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$sql = "SELECT * FROM $tbl_class_user WHERE class_id = '".Database::escape_string($class_id)."' AND user_id = '".Database::escape_string($single_class_user->user_id)."'"; |
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$res = Database::query($sql); |
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if (Database::num_rows($res) > 0) |
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{ |
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if (CourseManager :: get_user_in_course_status($single_class_user->user_id, $course_code) == STUDENT) |
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{ |
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CourseManager :: unsubscribe_user($single_class_user->user_id, $course_code); |
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} |
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} |
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} |
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$sql = "DELETE FROM $tbl_course_class WHERE course_code = '".Database::escape_string($course_code)."' AND class_id = '".Database::escape_string($class_id)."'"; |
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Database::query($sql); |
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} |
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$table_class_course = Database :: get_main_table(TABLE_MAIN_COURSE_CLASS); |
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$table_course = Database :: get_main_table(TABLE_MAIN_COURSE); |
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$sql = "SELECT * FROM $table_class_course cc, $table_course c WHERE cc.class_id = '".$class_id."' AND cc.course_code = c.code"; |
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$res = Database::query($sql); |
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$courses = array (); |
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while ($course = Database::fetch_array($res, 'ASSOC')) { |
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$courses[] = $course; |
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} |
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return $courses; |
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} |
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/** |
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* Subscribe all members of a class to a course |
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* @param int $class_id The class id |
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* @param string $course_code The course code |
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*/ |
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public static function subscribe_to_course($class_id, $course_code) { |
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$tbl_course_class = Database :: get_main_table(TABLE_MAIN_COURSE_CLASS); |
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$tbl_class_user = Database :: get_main_table(TABLE_MAIN_CLASS_USER); |
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$tbl_course_user = Database :: get_main_table(TABLE_MAIN_COURSE_USER); |
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$sql = "INSERT IGNORE INTO $tbl_course_class SET course_code = '".Database::escape_string($course_code)."', class_id = '".Database::escape_string($class_id)."'"; |
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Database::query($sql); |
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$sql = "SELECT user_id FROM $tbl_class_user WHERE class_id = '".Database::escape_string($class_id)."'"; |
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$res = Database::query($sql); |
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while ($user = Database::fetch_object($res)) { |
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CourseManager :: subscribe_user($user->user_id, $course_code); |
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} |
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} |
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/** |
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* Unsubscribe a class from a course. |
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* Only students are unsubscribed. If a user is member of 2 classes which |
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* are both subscribed to the course, the user stays in the course. |
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* @param int $class_id The class id |
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* @param string $course_code The course code |
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*/ |
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public static function unsubscribe_from_course($class_id, $course_code) |
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{ |
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$tbl_course_class = Database :: get_main_table(TABLE_MAIN_COURSE_CLASS); |
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$tbl_class_user = Database :: get_main_table(TABLE_MAIN_CLASS_USER); |
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$sql = "SELECT cu.user_id,COUNT(cc.class_id) FROM $tbl_course_class cc, $tbl_class_user cu WHERE cc.class_id = cu.class_id AND cc.course_code = '".Database::escape_string($course_code)."' GROUP BY cu.user_id HAVING COUNT(cc.class_id) = 1"; |
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$single_class_users = Database::query($sql); |
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while ($single_class_user = Database::fetch_object($single_class_users)) |
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{ |
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$sql = "SELECT * FROM $tbl_class_user WHERE class_id = '".Database::escape_string($class_id)."' AND user_id = '".Database::escape_string($single_class_user->user_id)."'"; |
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$res = Database::query($sql); |
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if (Database::num_rows($res) > 0) |
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{ |
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if (CourseManager :: get_user_in_course_status($single_class_user->user_id, $course_code) == STUDENT) |
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{ |
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CourseManager :: unsubscribe_user($single_class_user->user_id, $course_code); |
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} |
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} |
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} |
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$sql = "DELETE FROM $tbl_course_class WHERE course_code = '".Database::escape_string($course_code)."' AND class_id = '".Database::escape_string($class_id)."'"; |
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Database::query($sql); |
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} |
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|
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/** |
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* Get the class-id |
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* @param string $name The class name |
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* @return int the ID of the class |
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*/ |
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function get_class_id($name) { |
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/** |
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* Get the class-id |
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* @param string $name The class name |
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* @return int the ID of the class |
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*/ |
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public static function get_class_id($name) { |
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$name = Database::escape_string($name); |
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$table_class = Database :: get_main_table(TABLE_MAIN_CLASS); |
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$sql = "SELECT * FROM $table_class WHERE name='".$name."'"; |
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$res = Database::query($sql); |
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$obj = Database::fetch_object($res); |
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return $obj->id; |
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} |
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/** |
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* Get all classes subscribed in a course |
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* @param string $course_code |
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* @return array An array with all classes (keys: 'id','code','name') |
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*/ |
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function get_classes_in_course($course_code) { |
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$table_class = Database :: get_main_table(TABLE_MAIN_CLASS); |
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$table_course_class = Database :: get_main_table(TABLE_MAIN_COURSE_CLASS); |
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$sql = "SELECT cl.* FROM $table_class cl, $table_course_class cc WHERE cc.course_code = '".Database::escape_string($course_code)."' AND cc.class_id = cl.id"; |
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$res = Database::query($sql); |
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$classes = array (); |
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while ($class = Database::fetch_array($res, 'ASSOC')) { |
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$classes[] = $class; |
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} |
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return $classes; |
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} |
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$table_class = Database :: get_main_table(TABLE_MAIN_CLASS); |
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$sql = "SELECT * FROM $table_class WHERE name='".$name."'"; |
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$res = Database::query($sql); |
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$obj = Database::fetch_object($res); |
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return $obj->id; |
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} |
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/** |
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* Get all classes subscribed in a course |
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* @param string $course_code |
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* @return array An array with all classes (keys: 'id','code','name') |
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*/ |
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public static function get_classes_in_course($course_code) { |
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$table_class = Database :: get_main_table(TABLE_MAIN_CLASS); |
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$table_course_class = Database :: get_main_table(TABLE_MAIN_COURSE_CLASS); |
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$sql = "SELECT cl.* FROM $table_class cl, $table_course_class cc WHERE cc.course_code = '".Database::escape_string($course_code)."' AND cc.class_id = cl.id"; |
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$res = Database::query($sql); |
||||
$classes = array (); |
||||
while ($class = Database::fetch_array($res, 'ASSOC')) { |
||||
$classes[] = $class; |
||||
} |
||||
return $classes; |
||||
} |
||||
} |
||||
Loading…
Reference in new issue