\core\event\course_module_updated::create_from_cm($cm, $modcontext)->trigger();
     break;
 case 'duplicate':
     require_capability('moodle/course:manageactivities', $modcontext);
     require_capability('moodle/backup:backuptargetimport', $modcontext);
     require_capability('moodle/restore:restoretargetimport', $modcontext);
     if (!course_allowed_module($course, $cm->modname)) {
         throw new moodle_exception('No permission to create that activity');
     }
     $sr = optional_param('sr', null, PARAM_INT);
     $result = mod_duplicate_activity($course, $cm, $sr);
     echo json_encode($result);
     break;
 case 'groupmode':
     require_capability('moodle/course:manageactivities', $modcontext);
     set_coursemodule_groupmode($cm->id, $value);
     \core\event\course_module_updated::create_from_cm($cm, $modcontext)->trigger();
     break;
 case 'indent':
     require_capability('moodle/course:manageactivities', $modcontext);
     $cm->indent = $value;
     if ($cm->indent >= 0) {
         $DB->update_record('course_modules', $cm);
         rebuild_course_cache($cm->course);
     }
     break;
 case 'move':
     require_capability('moodle/course:manageactivities', $modcontext);
     if (!($section = $DB->get_record('course_sections', array('course' => $course->id, 'section' => $sectionid)))) {
         throw new moodle_exception('AJAX commands.php: Bad section ID ' . $sectionid);
     }

     }
     if (SITEID == $cm->course) {
         redirect($CFG->wwwroot);
     } else {
         redirect("view.php?id={$cm->course}#{$sectionreturn}");
     }
     exit;
 } else {
     if (isset($_GET['groupmode']) and confirm_sesskey()) {
         if (!($cm = get_record("course_modules", "id", $_GET['id']))) {
             error("This course module doesn't exist");
         }
         if (!isteacheredit($cm->course)) {
             error("You can't modify this course!");
         }
         set_coursemodule_groupmode($cm->id, $_GET['groupmode']);
         rebuild_course_cache($cm->course);
         if (SITEID == $cm->course) {
             redirect($CFG->wwwroot);
         } else {
             redirect("view.php?id={$cm->course}#{$sectionreturn}");
         }
         exit;
     } else {
         if (isset($_GET['copy']) and confirm_sesskey()) {
             // value = course module
             if (!($cm = get_record("course_modules", "id", $_GET['copy']))) {
                 error("This course module doesn't exist");
             }
             if (!isteacheredit($cm->course)) {
                 error("You can't modify this course!");

         redirect($CFG->wwwroot);
     } else {
         redirect("view.php?id={$cm->course}#section-{$sectionreturn}");
     }
     exit;
 } else {
     if ($groupmode > -1 and confirm_sesskey()) {
         $id = required_param('id', PARAM_INT);
         if (!($cm = get_record("course_modules", "id", $id))) {
             error("This course module doesn't exist");
         }
         require_login($cm->course);
         // needed to setup proper $COURSE
         $context = get_context_instance(CONTEXT_COURSE, $cm->course);
         require_capability('moodle/course:manageactivities', $context);
         set_coursemodule_groupmode($cm->id, $groupmode);
         rebuild_course_cache($cm->course);
         if (SITEID == $cm->course) {
             redirect($CFG->wwwroot);
         } else {
             redirect("view.php?id={$cm->course}#section-{$sectionreturn}");
         }
         exit;
     } else {
         if (!empty($copy) and confirm_sesskey()) {
             // value = course module
             if (!($cm = get_record("course_modules", "id", $copy))) {
                 error("This course module doesn't exist");
             }
             require_login($cm->course);
             // needed to setup proper $COURSE

     $fromform->name = $fromform->modulename;
 }
 if (!empty($fromform->update)) {
     if (!empty($course->groupmodeforce) or !isset($fromform->groupmode)) {
         $fromform->groupmode = $cm->groupmode;
         // keep original
     }
     $returnfromfunc = $updateinstancefunction($fromform);
     if (!$returnfromfunc) {
         error("Could not update the {$fromform->modulename}", "view.php?id={$course->id}");
     }
     if (is_string($returnfromfunc)) {
         error($returnfromfunc, "view.php?id={$course->id}");
     }
     set_coursemodule_visible($fromform->coursemodule, $fromform->visible);
     set_coursemodule_groupmode($fromform->coursemodule, $fromform->groupmode);
     set_coursemodule_groupingid($fromform->coursemodule, $fromform->groupingid);
     set_coursemodule_groupmembersonly($fromform->coursemodule, $fromform->groupmembersonly);
     if (isset($fromform->cmidnumber)) {
         //label
         // set cm idnumber
         set_coursemodule_idnumber($fromform->coursemodule, $fromform->cmidnumber);
     }
     add_to_log($course->id, "course", "update mod", "../mod/{$fromform->modulename}/view.php?id={$fromform->coursemodule}", "{$fromform->modulename} {$fromform->instance}");
     add_to_log($course->id, $fromform->modulename, "update", "view.php?id={$fromform->coursemodule}", "{$fromform->instance}", $fromform->coursemodule);
 } else {
     if (!empty($fromform->add)) {
         if (!empty($course->groupmodeforce) or !isset($fromform->groupmode)) {
             $fromform->groupmode = 0;
             // do not set groupmode
         }

    public function test_get_graders() {
        $this->create_extra_users();
        $this->setUser($this->editingteachers[0]);
        $assign = $this->create_instance();

        $this->assertCount(self::DEFAULT_TEACHER_COUNT +
                           self::DEFAULT_EDITING_TEACHER_COUNT +
                           self::EXTRA_TEACHER_COUNT +
                           self::EXTRA_EDITING_TEACHER_COUNT,
                           $assign->testable_get_graders($this->students[0]->id));

        $assign = $this->create_instance();
        // Force create an assignment with SEPARATEGROUPS.
        $generator = $this->getDataGenerator()->get_plugin_generator('mod_assign');
        $params = array('course'=>$this->course->id);
        $instance = $generator->create_instance($params);
        $cm = get_coursemodule_from_instance('assign', $instance->id);
        set_coursemodule_groupmode($cm->id, SEPARATEGROUPS);
        $cm->groupmode = SEPARATEGROUPS;
        $context = context_module::instance($cm->id);
        $assign = new testable_assign($context, $cm, $this->course);

        $this->setUser($this->students[1]);
        $this->assertCount(4, $assign->testable_get_graders($this->students[0]->id));
    }

//.........这里部分代码省略.........
     $record->course = $course->id;
     // Set Aggregate type = Average of ratings.
     $record->assessed = RATING_AGGREGATE_AVERAGE;
     $forum = self::getDataGenerator()->create_module('forum', $record);
     $contextid = context_module::instance($forum->cmid)->id;
     // Add discussion to the forums.
     $record = new stdClass();
     $record->course = $course->id;
     $record->userid = $student->id;
     $record->forum = $forum->id;
     $discussion = self::getDataGenerator()->get_plugin_generator('mod_forum')->create_discussion($record);
     // Retrieve the first post.
     $post = $DB->get_record('forum_posts', array('discussion' => $discussion->id));
     // Rete the discussion as teacher1.
     $rating1 = new stdClass();
     $rating1->contextid = $contextid;
     $rating1->component = 'mod_forum';
     $rating1->ratingarea = 'post';
     $rating1->itemid = $post->id;
     $rating1->rating = 90;
     $rating1->scaleid = 100;
     $rating1->userid = $teacher1->id;
     $rating1->timecreated = time();
     $rating1->timemodified = time();
     $rating1->id = $DB->insert_record('rating', $rating1);
     // Rete the discussion as teacher2.
     $rating2 = new stdClass();
     $rating2->contextid = $contextid;
     $rating2->component = 'mod_forum';
     $rating2->ratingarea = 'post';
     $rating2->itemid = $post->id;
     $rating2->rating = 95;
     $rating2->scaleid = 100;
     $rating2->userid = $teacher2->id;
     $rating2->timecreated = time() + 1;
     $rating2->timemodified = time() + 1;
     $rating2->id = $DB->insert_record('rating', $rating2);
     // Delete teacher2, we must still receive the ratings.
     delete_user($teacher2);
     // Teachers can see all the ratings.
     $this->setUser($teacher1);
     $ratings = core_rating_external::get_item_ratings('module', $forum->cmid, 'mod_forum', 'post', $post->id, 100, '');
     // We need to execute the return values cleaning process to simulate the web service server.
     $ratings = external_api::clean_returnvalue(core_rating_external::get_item_ratings_returns(), $ratings);
     $this->assertCount(2, $ratings['ratings']);
     $indexedratings = array();
     foreach ($ratings['ratings'] as $rating) {
         $indexedratings[$rating['id']] = $rating;
     }
     $this->assertEquals($rating1->rating . ' / ' . $rating1->scaleid, $indexedratings[$rating1->id]['rating']);
     $this->assertEquals($rating2->rating . ' / ' . $rating2->scaleid, $indexedratings[$rating2->id]['rating']);
     $this->assertEquals($rating1->userid, $indexedratings[$rating1->id]['userid']);
     $this->assertEquals($rating2->userid, $indexedratings[$rating2->id]['userid']);
     // Student can see ratings.
     $this->setUser($student);
     $ratings = core_rating_external::get_item_ratings('module', $forum->cmid, 'mod_forum', 'post', $post->id, 100, '');
     // We need to execute the return values cleaning process to simulate the web service server.
     $ratings = external_api::clean_returnvalue(core_rating_external::get_item_ratings_returns(), $ratings);
     $this->assertCount(2, $ratings['ratings']);
     // Invalid item.
     try {
         $ratings = core_rating_external::get_item_ratings('module', $forum->cmid, 'mod_forum', 'post', 0, 100, '');
         $this->fail('Exception expected due invalid itemid.');
     } catch (moodle_exception $e) {
         $this->assertEquals('invalidrecord', $e->errorcode);
     }
     // Invalid area.
     try {
         $ratings = core_rating_external::get_item_ratings('module', $forum->cmid, 'mod_forum', 'xyz', $post->id, 100, '');
         $this->fail('Exception expected due invalid rating area.');
     } catch (moodle_exception $e) {
         $this->assertEquals('invalidratingarea', $e->errorcode);
     }
     // Invalid context. invalid_parameter_exception.
     try {
         $ratings = core_rating_external::get_item_ratings('module', 0, 'mod_forum', 'post', $post->id, 100, '');
         $this->fail('Exception expected due invalid context.');
     } catch (invalid_parameter_exception $e) {
         $this->assertEquals('invalidparameter', $e->errorcode);
     }
     // Test for groupmode.
     set_coursemodule_groupmode($forum->cmid, SEPARATEGROUPS);
     $group = $this->getDataGenerator()->create_group(array('courseid' => $course->id));
     groups_add_member($group, $teacher1);
     $discussion->groupid = $group->id;
     $DB->update_record('forum_discussions', $discussion);
     // Error for teacher3 and 2 ratings for teacher1 should be returned.
     $this->setUser($teacher1);
     $ratings = core_rating_external::get_item_ratings('module', $forum->cmid, 'mod_forum', 'post', $post->id, 100, '');
     // We need to execute the return values cleaning process to simulate the web service server.
     $ratings = external_api::clean_returnvalue(core_rating_external::get_item_ratings_returns(), $ratings);
     $this->assertCount(2, $ratings['ratings']);
     $this->setUser($teacher3);
     try {
         $ratings = core_rating_external::get_item_ratings('module', $forum->cmid, 'mod_forum', 'post', $post->id, 100, '');
         $this->fail('Exception expected due invalid group permissions.');
     } catch (moodle_exception $e) {
         $this->assertEquals('noviewrate', $e->errorcode);
     }
 }

    public function test_get_graders() {
        $this->create_extra_users();
        $this->setUser($this->editingteachers[0]);

        // Create an assignment with no groups.
        $assign = $this->create_instance();
        $this->assertCount(self::DEFAULT_TEACHER_COUNT +
                           self::DEFAULT_EDITING_TEACHER_COUNT +
                           self::EXTRA_TEACHER_COUNT +
                           self::EXTRA_EDITING_TEACHER_COUNT,
                           $assign->testable_get_graders($this->students[0]->id));

        // Force create an assignment with SEPARATEGROUPS.
        $data = new stdClass();
        $data->courseid = $this->course->id;
        $data->name = 'Grouping';
        $groupingid = groups_create_grouping($data);
        groups_assign_grouping($groupingid, $this->groups[0]->id);

        $generator = $this->getDataGenerator()->get_plugin_generator('mod_assign');
        $params = array('course'=>$this->course->id);
        $instance = $generator->create_instance($params);
        $cm = get_coursemodule_from_instance('assign', $instance->id);
        set_coursemodule_groupmode($cm->id, SEPARATEGROUPS);
        $cm->groupmode = SEPARATEGROUPS;
        $cm->groupingid = $groupingid;
        $context = context_module::instance($cm->id);
        $assign = new testable_assign($context, $cm, $this->course);

        $this->setUser($this->students[1]);
        $this->assertCount(4, $assign->testable_get_graders($this->students[0]->id));
        // Note the second student is in a group that is not in the grouping.
        // This means that we get all graders that are not in a group in the grouping.
        $this->assertCount(10, $assign->testable_get_graders($this->students[1]->id));
    }

 /**
  * Test get_item_ratings
  */
 public function test_get_item_ratings()
 {
     global $DB;
     // Rete the discussion as teacher1.
     $rating1 = new stdClass();
     $rating1->contextid = $this->contextid;
     $rating1->component = 'mod_forum';
     $rating1->ratingarea = 'post';
     $rating1->itemid = $this->post->id;
     $rating1->rating = 90;
     $rating1->scaleid = 100;
     $rating1->userid = $this->teacher1->id;
     $rating1->timecreated = time();
     $rating1->timemodified = time();
     $rating1->id = $DB->insert_record('rating', $rating1);
     // Rete the discussion as teacher2.
     $rating2 = new stdClass();
     $rating2->contextid = $this->contextid;
     $rating2->component = 'mod_forum';
     $rating2->ratingarea = 'post';
     $rating2->itemid = $this->post->id;
     $rating2->rating = 95;
     $rating2->scaleid = 100;
     $rating2->userid = $this->teacher2->id;
     $rating2->timecreated = time() + 1;
     $rating2->timemodified = time() + 1;
     $rating2->id = $DB->insert_record('rating', $rating2);
     // Delete teacher2, we must still receive the ratings.
     delete_user($this->teacher2);
     // Teachers can see all the ratings.
     $this->setUser($this->teacher1);
     $ratings = core_rating_external::get_item_ratings('module', $this->forum->cmid, 'mod_forum', 'post', $this->post->id, 100, '');
     // We need to execute the return values cleaning process to simulate the web service server.
     $ratings = external_api::clean_returnvalue(core_rating_external::get_item_ratings_returns(), $ratings);
     $this->assertCount(2, $ratings['ratings']);
     $indexedratings = array();
     foreach ($ratings['ratings'] as $rating) {
         $indexedratings[$rating['id']] = $rating;
     }
     $this->assertEquals($rating1->rating . ' / ' . $rating1->scaleid, $indexedratings[$rating1->id]['rating']);
     $this->assertEquals($rating2->rating . ' / ' . $rating2->scaleid, $indexedratings[$rating2->id]['rating']);
     $this->assertEquals($rating1->userid, $indexedratings[$rating1->id]['userid']);
     $this->assertEquals($rating2->userid, $indexedratings[$rating2->id]['userid']);
     // Student can see ratings.
     $this->setUser($this->student1);
     $ratings = core_rating_external::get_item_ratings('module', $this->forum->cmid, 'mod_forum', 'post', $this->post->id, 100, '');
     // We need to execute the return values cleaning process to simulate the web service server.
     $ratings = external_api::clean_returnvalue(core_rating_external::get_item_ratings_returns(), $ratings);
     $this->assertCount(2, $ratings['ratings']);
     // Invalid item.
     try {
         $ratings = core_rating_external::get_item_ratings('module', $this->forum->cmid, 'mod_forum', 'post', 0, 100, '');
         $this->fail('Exception expected due invalid itemid.');
     } catch (moodle_exception $e) {
         $this->assertEquals('invalidrecord', $e->errorcode);
     }
     // Invalid area.
     try {
         $ratings = core_rating_external::get_item_ratings('module', $this->forum->cmid, 'mod_forum', 'xyz', $this->post->id, 100, '');
         $this->fail('Exception expected due invalid rating area.');
     } catch (moodle_exception $e) {
         $this->assertEquals('invalidratingarea', $e->errorcode);
     }
     // Invalid context. invalid_parameter_exception.
     try {
         $ratings = core_rating_external::get_item_ratings('module', 0, 'mod_forum', 'post', $this->post->id, 100, '');
         $this->fail('Exception expected due invalid context.');
     } catch (invalid_parameter_exception $e) {
         $this->assertEquals('invalidparameter', $e->errorcode);
     }
     // Test for groupmode.
     set_coursemodule_groupmode($this->forum->cmid, SEPARATEGROUPS);
     $group = $this->getDataGenerator()->create_group(array('courseid' => $this->course->id));
     groups_add_member($group, $this->teacher1);
     $this->discussion->groupid = $group->id;
     $DB->update_record('forum_discussions', $this->discussion);
     // Error for teacher3 and 2 ratings for teacher1 should be returned.
     $this->setUser($this->teacher1);
     $ratings = core_rating_external::get_item_ratings('module', $this->forum->cmid, 'mod_forum', 'post', $this->post->id, 100, '');
     // We need to execute the return values cleaning process to simulate the web service server.
     $ratings = external_api::clean_returnvalue(core_rating_external::get_item_ratings_returns(), $ratings);
     $this->assertCount(2, $ratings['ratings']);
     $this->setUser($this->teacher3);
     try {
         $ratings = core_rating_external::get_item_ratings('module', $this->forum->cmid, 'mod_forum', 'post', $this->post->id, 100, '');
         $this->fail('Exception expected due invalid group permissions.');
     } catch (moodle_exception $e) {
         $this->assertEquals('noviewrate', $e->errorcode);
     }
 }