// the data about student interaction with the questions. The functions to do
// that are included with the following library
require_once("$CFG->dirroot/question/backuplib.php");
-
+
/*
- * Insert necessary category ids to backup_ids table. Called during backup_check.html
+ * Insert necessary category ids to backup_ids table. Called during backup_check.html.
+ * This backs up ids for quiz module. It backs up :
+ * all categories and questions in course
+ * all categories and questions in contexts of quiz module instances which have been selected for backup
+ * all categories and questions in contexts above course level that are used by quizzes that have been selected for backup
*/
function insert_category_and_question_ids($course, $backup_unique_code, $instances = null) {
global $CFG;
-
+ $status = true;
+
// Create missing categories and reasign orphaned questions.
fix_orphaned_questions($course);
- // First, all categories from this course's context.
+
$coursecontext = get_context_instance(CONTEXT_COURSE, $course);
- $status = execute_sql("INSERT INTO {$CFG->prefix}backup_ids
- (backup_code, table_name, old_id, info)
- SELECT '$backup_unique_code', 'question_categories', qc.id, ''
- FROM {$CFG->prefix}question_categories qc
- WHERE qc.contextid = {$coursecontext->id}", false);
-
-
- // then, all categories from this course's modules' contexts.
- // using 'dummykeyname' in sql because otherwise get_records_sql_menu returns an error
- // if two key names are the same.
- $cmcontexts = get_records_sql_menu("SELECT c.id, c.id AS dummykeyname FROM {$CFG->prefix}modules m,
- {$CFG->prefix}course_modules cm,
- {$CFG->prefix}context c
- WHERE m.name = 'quiz' AND m.id = cm.module AND cm.id = c.instanceid
- AND c.contextlevel = ".CONTEXT_MODULE." AND cm.course = $course");
- if ($cmcontexts){
- $status = $status && execute_sql("INSERT INTO {$CFG->prefix}backup_ids
- (backup_code, table_name, old_id, info)
- SELECT '$backup_unique_code', 'question_categories', qc.id, ''
- FROM {$CFG->prefix}question_categories qc
- WHERE qc.contextid IN (".join(array_keys($cmcontexts), ', ').")", false);
- }
- //put the ids of the questions from all these categories into the db.
- $status = $status && execute_sql("INSERT INTO {$CFG->prefix}backup_ids
- (backup_code, table_name, old_id, info)
- SELECT '$backup_unique_code', 'question', q.id, ''
- FROM {$CFG->prefix}question q, {$CFG->prefix}backup_ids bk
- WHERE q.category = bk.old_id AND bk.table_name = 'question_categories' AND
- bk.backup_code = '$backup_unique_code'", false);
+ $status = $status && question_insert_c_and_q_ids_for_course($coursecontext, $backup_unique_code);
+
+ // then, all categories and questions from this course's modules' contexts.
+ $status = $status && question_insert_c_and_q_ids_for_module($backup_unique_code, $course, 'quiz', $instances);
+
// Then categories from parent contexts used by the quizzes we are backing up.
//TODO this will need generalising when we have modules other than quiz using shared questions above course level.
}
return $status;
}
-
+
/**
* Helper function adding the id of all the subcategories of a category to an array.
*/
////Return an array of info (name,value)
/// $instances is an array with key = instanceid, value = object (name,id,userdata)
function quiz_check_backup_mods($course,$user_data= false,$backup_unique_code,$instances=null) {
- //Deletes data from mdl_backup_ids (categories section)
- delete_ids ($backup_unique_code, 'question_categories');
- delete_ids ($backup_unique_code, 'question');
//this function selects all the questions / categories to be backed up.
insert_category_and_question_ids($course, $backup_unique_code, $instances);
if ($course != SITEID){
WHERE backup_code = '$backup_unique_code' AND
table_name = 'question'");
}
+
+ //Function for inserting question and category ids into db that are all called from
+ // quiz_check_backup_mods during execution of backup_check.html
- //Delete category ids from backup_ids table
- function delete_ids ($backup_unique_code, $tablename) {
+
+ function question_insert_c_and_q_ids_for_course($coursecontext, $backup_unique_code){
+ global $CFG;
+ // First, all categories from this course's context.
+ $status = execute_sql("INSERT INTO {$CFG->prefix}backup_ids
+ (backup_code, table_name, old_id, info)
+ SELECT '$backup_unique_code', 'question_categories', qc.id, 'course'
+ FROM {$CFG->prefix}question_categories qc
+ WHERE qc.contextid = {$coursecontext->id}", false);
+ $status = $status && question_insert_q_ids($backup_unique_code, 'course');
+ return $status;
+ }
+ /*
+ * Insert all question ids for categories whose ids have already been inserted in the backup_ids table
+ * Insert code to identify categories to later insert all question ids later eg. course, quiz or other module name.
+ */
+ function question_insert_q_ids($backup_unique_code, $info){
+ global $CFG;
+ //put the ids of the questions from all these categories into the db.
+ $status = execute_sql("INSERT INTO {$CFG->prefix}backup_ids
+ (backup_code, table_name, old_id, info)
+ SELECT '$backup_unique_code', 'question', q.id, ''
+ FROM {$CFG->prefix}question q, {$CFG->prefix}backup_ids bk
+ WHERE q.category = bk.old_id AND bk.table_name = 'question_categories'
+ AND bk.info = '$info'
+ AND bk.backup_code = '$backup_unique_code'", false);
+ return $status;
+ }
+
+ function question_insert_c_and_q_ids_for_module($backup_unique_code, $course, $modulename, $instances){
global $CFG;
- $status = execute_sql("DELETE FROM {$CFG->prefix}backup_ids
- WHERE backup_code = '$backup_unique_code' AND table_name = '$tablename'",false);
+ $status = true;
+ // using 'dummykeyname' in sql because otherwise get_records_sql_menu returns an error
+ // if two key names are the same.
+ $cmcontexts = get_records_sql_menu("SELECT c.id, c.id AS dummykeyname FROM {$CFG->prefix}modules m,
+ {$CFG->prefix}course_modules cm,
+ {$CFG->prefix}context c
+ WHERE m.name = 'quiz' AND m.id = cm.module AND cm.id = c.instanceid
+ AND c.contextlevel = ".CONTEXT_MODULE." AND cm.course = $course
+ AND cm.instance IN (".implode(',',array_keys($instances)).")");
+
+ if ($cmcontexts){
+ $status = $status && execute_sql("INSERT INTO {$CFG->prefix}backup_ids
+ (backup_code, table_name, old_id, info)
+ SELECT '$backup_unique_code', 'question_categories', qc.id, '$modulename'
+ FROM {$CFG->prefix}question_categories qc
+ WHERE qc.contextid IN (".join(array_keys($cmcontexts), ', ').")", false);
+ }
+ $status = $status && question_insert_q_ids($backup_unique_code, $modulename);
return $status;
}
+
function question_insert_site_file_names($course, $backup_unique_code){
global $QTYPES, $CFG;
$status = true;
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