MDL-30635 enable standard cron for all question and quiz plugin types.

* Support for old non-standard cron for quiz reports dropped. (Standard
cron support was added in 2.2

* Cron support added for qbehaviour, qformat and quizacces plugins.

* qtypes were already supported in the standard way.

lib/cronlib.php

@@ -300,35 +300,6 @@ function cron_run() {
     mtrace('Finished blocks');
 
 
-    //TODO: get rid of this bloody hardcoded quiz module stuff, this must be done from quiz_cron()!
-    mtrace("Starting quiz reports");
-    if ($reports = $DB->get_records_select('quiz_reports', "cron > 0 AND ((? - lastcron) > cron)", array($timenow))) {
-        foreach ($reports as $report) {
-            $cronfile = "$CFG->dirroot/mod/quiz/report/$report->name/cron.php";
-            if (file_exists($cronfile)) {
-                include_once($cronfile);
-                $cron_function = 'quiz_report_'.$report->name."_cron";
-                if (function_exists($cron_function)) {
-                    mtrace("Processing quiz report cron function $cron_function ...", '');
-                    $pre_dbqueries = null;
-                    $pre_dbqueries = $DB->perf_get_queries();
-                    $pre_time      = microtime(1);
-                    if ($cron_function()) {
-                        $DB->set_field('quiz_reports', "lastcron", $timenow, array("id"=>$report->id));
-                    }
-                    if (isset($pre_dbqueries)) {
-                        mtrace("... used " . ($DB->perf_get_queries() - $pre_dbqueries) . " dbqueries");
-                        mtrace("... used " . (microtime(1) - $pre_time) . " seconds");
-                    }
-                    @set_time_limit(0);
-                    mtrace("done.");
-                }
-            }
-        }
-    }
-    mtrace("Finished quiz reports");
-
-
     mtrace('Starting admin reports');
     cron_execute_plugin_type('report');
     mtrace('Finished admin reports');
@@ -428,6 +399,8 @@ function cron_run() {
     // TODO: Repository lib.php files are messed up (include many other files, etc), so it is
     // currently not possible to implement repository plugin cron using this infrastructure
     // cron_execute_plugin_type('repository', 'repository plugins');
+    cron_execute_plugin_type('qbehaviour', 'question behaviours');
+    cron_execute_plugin_type('qformat', 'question import/export formats');
     cron_execute_plugin_type('qtype', 'question types');
     cron_execute_plugin_type('plagiarism', 'plagiarism plugins');
     cron_execute_plugin_type('theme', 'themes');

mod/quiz/accessrule/upgrade.txt

@@ -0,0 +1,15 @@
+This files describes API changes for quiz access rule plugins.
+
+Overview of this plugin type at http://docs.moodle.org/dev/Quiz_access_rules
+
+
+=== 2.2 ===
+
+* This plugin type was new in Moodle 2.2!
+
+
+=== 2.3 ===
+
+* This plugin type now supports cron in the standard way. If required, Create a
+  lib.php file containing
+function quizaccess_mypluginname_cron() {};

mod/quiz/db/install.xml

@@ -140,10 +140,8 @@
       <FIELDS>
         <FIELD NAME="id" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="true" NEXT="name"/>
         <FIELD NAME="name" TYPE="char" LENGTH="255" NOTNULL="false" SEQUENCE="false" COMMENT="name of the report, same as the directory name" PREVIOUS="id" NEXT="displayorder"/>
-        <FIELD NAME="displayorder" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="false" COMMENT="display order for report tabs" PREVIOUS="name" NEXT="lastcron"/>
-        <FIELD NAME="lastcron" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" COMMENT="timestamp when cron was last run for this report." PREVIOUS="displayorder" NEXT="cron"/>
-        <FIELD NAME="cron" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false" COMMENT="0 if there is no cron for this report (default) or the time between crons otherwise." PREVIOUS="lastcron" NEXT="capability"/>
-        <FIELD NAME="capability" TYPE="char" LENGTH="255" NOTNULL="false" SEQUENCE="false" COMMENT="Capability required to see this report. May be blank which means use the default of mod/quiz:viewreport. This is used when deciding which tabs to render." PREVIOUS="cron"/>
+        <FIELD NAME="displayorder" TYPE="int" LENGTH="10" NOTNULL="true" UNSIGNED="true" SEQUENCE="false" COMMENT="display order for report tabs" PREVIOUS="name" NEXT="capability"/>
+        <FIELD NAME="capability" TYPE="char" LENGTH="255" NOTNULL="false" SEQUENCE="false" COMMENT="Capability required to see this report. May be blank which means use the default of mod/quiz:viewreport. This is used when deciding which tabs to render." PREVIOUS="displayorder"/>
       </FIELDS>
       <KEYS>
         <KEY NAME="primary" TYPE="primary" FIELDS="id"/>

mod/quiz/db/upgrade.php

@@ -40,6 +40,36 @@ function xmldb_quiz_upgrade($oldversion) {
     // Moodle v2.2.0 release upgrade line
     // Put any upgrade step following this
 
+    if ($oldversion < 2011120700) {
+
+        // Define field lastcron to be dropped from quiz_reports
+        $table = new xmldb_table('quiz_reports');
+        $field = new xmldb_field('lastcron');
+
+        // Conditionally launch drop field lastcron
+        if ($dbman->field_exists($table, $field)) {
+            $dbman->drop_field($table, $field);
+        }
+
+        // quiz savepoint reached
+        upgrade_mod_savepoint(true, 2011120700, 'quiz');
+    }
+
+    if ($oldversion < 2011120701) {
+
+        // Define field cron to be dropped from quiz_reports
+        $table = new xmldb_table('quiz_reports');
+        $field = new xmldb_field('cron');
+
+        // Conditionally launch drop field cron
+        if ($dbman->field_exists($table, $field)) {
+            $dbman->drop_field($table, $field);
+        }
+
+        // quiz savepoint reached
+        upgrade_mod_savepoint(true, 2011120701, 'quiz');
+    }
+
     return true;
 }
 

mod/quiz/lib.php

@@ -435,14 +435,13 @@ function quiz_user_complete($course, $user, $mod, $quiz) {
 }
 
 /**
- * Function to be run periodically according to the moodle cron
- * This function searches for things that need to be done, such
- * as sending out mail, toggling flags etc ...
- *
- * @return bool true
+ * Quiz periodic clean-up tasks.
  */
 function quiz_cron() {
-    return true;
+
+    // Run cron for our sub-plugin types.
+    cron_execute_plugin_type('quiz', 'quiz reports');
+    cron_execute_plugin_type('quizaccess', 'quiz access rules');
 }
 
 /**

mod/quiz/report/statistics/db/install.php

@@ -37,7 +37,6 @@ function xmldb_quiz_statistics_install() {
     $record = new stdClass();
     $record->name         = 'statistics';
     $record->displayorder = 8000;
-    $record->cron         = 18000;
     $record->capability   = 'quiz/statistics:view';
 
     if ($dbman->table_exists('quiz_reports')) {

mod/quiz/report/statistics/lib.php

@@ -24,6 +24,9 @@
  */
 
 
+defined('MOODLE_INTERNAL') || die();
+
+
 /**
  * Serve questiontext files in the question text when they are displayed in this report.
  * @param context $context the context
@@ -44,3 +47,37 @@ function quiz_statistics_questiontext_preview_pluginfile($context, $questionid,
 
     question_send_questiontext_file($questionid, $args, $forcedownload);
 }
+
+/**
+* Quiz statistics report cron code. Deletes cached data more than a certain age.
+*/
+function quiz_report_statistics_cron() {
+    global $DB;
+
+    $expiretime = time() - 5*HOURSECS;
+    $todelete = $DB->get_records_select_menu('quiz_statistics', 'timemodified < ?',
+    array($expiretime), '', 'id, 1');
+
+    if (!$todelete) {
+        return true;
+    }
+
+    list($todeletesql, $todeleteparams) = $DB->get_in_or_equal(array_keys($todelete));
+
+    if (!$DB->delete_records_select('quiz_question_statistics',
+            'quizstatisticsid ' . $todeletesql, $todeleteparams)) {
+    mtrace('Error deleting out of date quiz_question_statistics records.');
+    }
+
+    if (!$DB->delete_records_select('quiz_question_response_stats',
+            'quizstatisticsid ' . $todeletesql, $todeleteparams)) {
+    mtrace('Error deleting out of date quiz_question_response_stats records.');
+    }
+
+    if (!$DB->delete_records_select('quiz_statistics',
+            'id ' . $todeletesql, $todeleteparams)) {
+    mtrace('Error deleting out of date quiz_statistics records.');
+    }
+
+    return true;
+}

mod/quiz/report/statistics/version.php

@@ -25,6 +25,7 @@
 
 defined('MOODLE_INTERNAL') || die();
 
-$plugin->version  = 2011062600;
-$plugin->requires = 2011060313;
+$plugin->version   = 2011062600;
+$plugin->requires  = 2011060313;
+$plugin->cron      = 18000;
 $plugin->component = 'quiz_statistics';

mod/quiz/report/upgrade.txt

@@ -0,0 +1,22 @@
+This files describes API changes for quiz report plugins.
+
+Overview of this plugin type at http://docs.moodle.org/dev/Quiz_reports
+
+
+=== earlier versions ===
+
+* ... API changes were not documented properly. Sorry. (There weren't many!)
+
+
+=== 2.2 ===
+
+* Plugins should be converted to implement cron in the standard way. In lib.php,
+define a
+function quiz_myreportname_cron() {};
+This replaces the old way of having a separate cron.php file. Also, the cron
+frequency should be defined in version.php, not in the quiz_reports table.
+
+
+=== 2.3 ===
+
+* Support for the old way of doing cron in a separate cron.php file has been removed.

mod/quiz/version.php

@@ -25,7 +25,7 @@
 
 defined('MOODLE_INTERNAL') || die();
 
-$module->version   = 2011112900;       // The current module version (Date: YYYYMMDDXX)
+$module->version   = 2011120701;       // The current module version (Date: YYYYMMDDXX)
 $module->requires  = 2011112900;       // Requires this Moodle version
 $module->component = 'mod_quiz';       // Full name of the plugin (used for diagnostics)
 $module->cron      = 0;

question/behaviour/upgrade.txt

@@ -14,3 +14,10 @@ $plugin->dependencies = array(
 is_compatible_question method. You should change your behaviour to override the
 new method, not the old one. This change has been implemented in a
 backwards-compatible way, so behaviours will not break.
+
+
+=== 2.3 ===
+
+* This plugin type now supports cron in the standard way. If required, Create a
+  lib.php file containing
+function qbehaviour_mypluginname_cron() {};

question/format/upgrade.txt

@@ -15,3 +15,10 @@ other plugin types.
 $string['pluginname'] = 'Aiken format';
 $string['pluginname_help'] = 'This is a simple format ...';
 $string['pluginname_link'] = 'qformat/aiken';
+
+
+=== 2.3 ===
+
+* This plugin type now supports cron in the standard way. If required, Create a
+  lib.php file containing
+function qformat_mypluginname_cron() {};

question/type/upgrade.txt

@@ -1,5 +1,20 @@
 This files describes API changes for question type plugins.
 
+=== 2.0 ===
+
+* Lots of changes due to all the API changes in Moodle 2.0.
+
+* This plugin type now supports cron in the standard way. If required, Create a
+  lib.php file containing
+function qtype_mypluginname_cron() {};
+
+
+=== 2.1 ===
+
+* Lots of API changes due to the new question engine. See
+http://docs.moodle.org/dev/Developing_a_Question_Type#Converting_a_Moodle_2.0_question_type
+
+
 === 2.2 ===
 
 * The XML import/export base class has had some minor API changes. The