//.........这里部分代码省略.........
                    $items[$id] = $cm->name;
                }
            }
            if (count($items)) {
                asort($items);
                $conditioncmidmenu = $basemenuitems + $items;
            }
        }
        $conditionfieldnamemenu = array('' => get_string('none', 'moodle'));
        $conditionfieldoperatormenu = array();
        $filepath = $CFG->dirroot . '/availability/condition/profile/classes/frontend.php';
        if (file_exists($filepath)) {
            // Moodle >= 2.7
            $contents = file_get_contents($filepath);
            $search = "/'([a-zA-Z0-9]+)' => get_user_field_name\\('\\1'\\)/";
            if (preg_match_all($search, $contents, $items)) {
                foreach ($items[1] as $item) {
                    $conditionfieldnamemenu[$item] = get_user_field_name($item);
                }
            }
            $search = "/(?<=')op_([a-zA-Z0-9]+)(?=')/";
            if (preg_match_all($search, $contents, $items)) {
                foreach ($items[1] as $i => $item) {
                    $conditionfieldoperatormenu[$item] = get_string($items[0][$i], 'availability_profile');
                }
            }
            require_once $CFG->dirroot . '/user/profile/lib.php';
            if ($items = profile_get_custom_fields(true)) {
                foreach ($items as $item) {
                    $conditionfieldnamemenu[$item->shortname] = $item->name;
                }
            }
        } else {
            if (method_exists('condition_info', 'get_condition_user_fields')) {
                // Moodle >= 2.4
                if ($items = condition_info::get_condition_user_fields(array('context' => $course->context))) {
                    $conditionfieldnamemenu += $items;
                }
                $conditionfieldoperatormenu = condition_info::get_condition_user_field_operators();
            } else {
                // Moodle <= 2.3 doesn't have conditional user fields
                $conditionfieldnamemenu = array();
            }
        }
        if ($dbman->field_exists('course_modules', 'availability')) {
            // Moodle >= 2.7
            if ($items = groups_get_all_groups($course->id)) {
                foreach ($items as $item) {
                    $name = $item->name;
                    $name = block_taskchain_navigation::filter_text($name);
                    $name = block_taskchain_navigation::trim_text($name);
                    $conditiongroupidmenu[$item->id] = $name;
                }
            }
            if ($items = groups_get_all_groupings($course->id)) {
                foreach ($items as $item) {
                    $name = $item->name;
                    $name = block_taskchain_navigation::filter_text($name);
                    $name = block_taskchain_navigation::trim_text($name);
                    $conditiongroupingidmenu[$item->id] = $name;
                }
            }
        }
        $str = new stdClass();
        if ($strman->string_exists('accessrestrictions', 'availability')) {
            // Moodle >= 2.7

//.........这里部分代码省略.........
    if ($oldversion < 2011110102) {
        require_once $CFG->libdir . '/conditionlib.php';
        $table = new xmldb_table('certificate');
        // It is possible for these fields not to be added, ever, it is included in the upgrade
        // process but fresh certificate 1.9 install from CVS MOODLE_19_STABLE set the Moodle version
        // to 2009080900, which means it missed all the earlier code written for upgrading to 2.0.
        $reissuefield = new xmldb_field('reissuecert', XMLDB_TYPE_INTEGER, '2', null, XMLDB_NOTNULL, null, '0', 'reportcert');
        $orientationfield = new xmldb_field('orientation', XMLDB_TYPE_CHAR, '10', null, XMLDB_NOTNULL, null, ' ', 'certificatetype');
        // Have to check, may be added during earlier upgrade, or may be missing due to not being included in install.xml
        if (!$dbman->field_exists($table, $reissuefield)) {
            $dbman->add_field($table, $reissuefield);
        }
        if (!$dbman->field_exists($table, $orientationfield)) {
            $dbman->add_field($table, $orientationfield);
        }
        // Fresh 2.0 installs won't have this table, but upgrades from 1.9 will
        if ($dbman->table_exists('certificate_linked_modules')) {
            // No longer need lock grade, or required grade, but first need to
            // convert so that the restrictions are still in place for Moodle 2.0
            if ($certs = $DB->get_records('certificate')) {
                foreach ($certs as $cert) {
                    if ($cert->lockgrade == 0) {
                        // Can skip this certificate, no course grade required
                        continue;
                    }
                    if (!($cm = get_coursemodule_from_instance('certificate', $cert->id))) {
                        // Not valid skip it
                        continue;
                    }
                    if (!($gradeitem = $DB->get_record('grade_items', array('courseid' => $cm->course, 'itemtype' => 'course')))) {
                        // Not valid skip it
                        continue;
                    }
                    $condition_info = new condition_info($cm, CONDITION_MISSING_EVERYTHING);
                    $condition_info->add_grade_condition($gradeitem->id, $cert->requiredgrade, '110');
                }
            }
            // Fresh installs won't have this table, but upgrades will
            // Lock grade and required grade field are not needed anymore
            if ($dbman->field_exists($table, 'lockgrade')) {
                $field = new xmldb_field('lockgrade');
                $dbman->drop_field($table, $field);
            }
            if ($dbman->field_exists($table, 'requiredgrade')) {
                $field = new xmldb_field('requiredgrade');
                $dbman->drop_field($table, $field);
            }
            // Now we need to loop through the restrictions in the certificate_linked_modules
            // table and convert it into the new Moodle 2.0 restrictions
            if ($certlinks = $DB->get_records('certificate_linked_modules')) {
                foreach ($certlinks as $link) {
                    // If the link id is '-1' then the setting applies to the time spent in the course and is not
                    // related to a module, meaning we can skip it for this section
                    if ($link->linkid == '-1') {
                        continue;
                    }
                    // Get the course module
                    if (!($cm = get_coursemodule_from_instance('certificate', $link->certificate_id))) {
                        // Not valid skip it
                        continue;
                    }
                    // Get grade item for module specified - is there an API function for this ??
                    $sql = "SELECT gi.id\n                            FROM {course_modules} cm\n                            INNER JOIN {modules} m\n                            ON cm.module = m.id\n                            INNER JOIN {grade_items} gi\n                            ON m.name = gi.itemmodule\n                            WHERE cm.id = :cmid\n                            AND cm.course = :courseid\n                            AND cm.instance = gi.iteminstance";
                    if (!($gradeitem = $DB->get_record_sql($sql, array('cmid' => $link->linkid, 'courseid' => $cm->course)))) {
                        // Not valid skip it
                        continue;

//.........这里部分代码省略.........
            }
            // Completion
            $completion = $hidecompletion ? COMPLETION_TRACKING_NONE : $completioninfo->is_enabled($mod);
            if ($completion != COMPLETION_TRACKING_NONE && isloggedin() && !isguestuser() && $mod->uservisible) {
                $completiondata = $completioninfo->get_data($mod, true);
                $completionicon = '';
                if ($isediting) {
                    switch ($completion) {
                        case COMPLETION_TRACKING_MANUAL:
                            $completionicon = 'manual-enabled';
                            break;
                        case COMPLETION_TRACKING_AUTOMATIC:
                            $completionicon = 'auto-enabled';
                            break;
                        default:
                            // wtf
                    }
                } else {
                    if ($completion == COMPLETION_TRACKING_MANUAL) {
                        switch ($completiondata->completionstate) {
                            case COMPLETION_INCOMPLETE:
                                $completionicon = 'manual-n';
                                break;
                            case COMPLETION_COMPLETE:
                                $completionicon = 'manual-y';
                                break;
                        }
                    } else {
                        // Automatic
                        switch ($completiondata->completionstate) {
                            case COMPLETION_INCOMPLETE:
                                $completionicon = 'auto-n';
                                break;
                            case COMPLETION_COMPLETE:
                                $completionicon = 'auto-y';
                                break;
                            case COMPLETION_COMPLETE_PASS:
                                $completionicon = 'auto-pass';
                                break;
                            case COMPLETION_COMPLETE_FAIL:
                                $completionicon = 'auto-fail';
                                break;
                        }
                    }
                }
                if ($completionicon) {
                    $imgsrc = $OUTPUT->pix_url('i/completion-' . $completionicon);
                    $imgalt = s(get_string('completion-alt-' . $completionicon, 'completion', $mod->name));
                    if ($completion == COMPLETION_TRACKING_MANUAL && !$isediting) {
                        $imgtitle = s(get_string('completion-title-' . $completionicon, 'completion', $mod->name));
                        $newstate = $completiondata->completionstate == COMPLETION_COMPLETE ? COMPLETION_INCOMPLETE : COMPLETION_COMPLETE;
                        // In manual mode the icon is a toggle form...
                        // If this completion state is used by the
                        // conditional activities system, we need to turn
                        // off the JS.
                        if (!empty($CFG->enableavailability) && condition_info::completion_value_used_as_condition($course, $mod)) {
                            $extraclass = ' preventjs';
                        } else {
                            $extraclass = '';
                        }
                        echo "\n<form class='togglecompletion{$extraclass}' method='post' action='" . $CFG->wwwroot . "/course/togglecompletion.php'><div>\n<input type='hidden' name='id' value='{$mod->id}' />\n<input type='hidden' name='modulename' value='" . s($mod->name) . "' />\n<input type='hidden' name='sesskey' value='" . sesskey() . "' />\n<input type='hidden' name='completionstate' value='{$newstate}' />\n<input type='image' src='{$imgsrc}' alt='{$imgalt}' title='{$imgtitle}' />\n</div></form>";
                    } else {
                        // In auto mode, or when editing, the icon is just an image
                        echo "<span class='autocompletion'>";
                        echo "<img src='{$imgsrc}' alt='{$imgalt}' title='{$imgalt}' /></span>";
                    }
                }
            }
            // If there is content AND a link, then display the content here
            // (AFTER any icons). Otherwise it was displayed before
            if (!empty($url)) {
                echo $contentpart;
            }
            // Show availability information (for someone who isn't allowed to
            // see the activity itself, or for staff)
            if (!$mod->uservisible) {
                echo '<div class="availabilityinfo">' . $mod->availableinfo . '</div>';
            } else {
                if ($canviewhidden && !empty($CFG->enableavailability)) {
                    $ci = new condition_info($mod);
                    $fullinfo = $ci->get_full_information();
                    if ($fullinfo) {
                        echo '<div class="availabilityinfo">' . get_string($mod->showavailability ? 'userrestriction_visible' : 'userrestriction_hidden', 'condition', $fullinfo) . '</div>';
                    }
                }
            }
            echo html_writer::end_tag('div');
            echo html_writer::end_tag('li') . "\n";
        }
    } elseif ($ismoving) {
        echo "<ul class=\"section\">\n";
    }
    if ($ismoving) {
        echo '<li><a title="' . $strmovefull . '"' . ' href="' . $CFG->wwwroot . '/course/mod.php?movetosection=' . $section->id . '&amp;sesskey=' . sesskey() . '">' . '<img class="movetarget" src="' . $OUTPUT->pix_url('movehere') . '" ' . ' alt="' . $strmovehere . '" /></a></li>
             ';
    }
    if (!empty($section->sequence) || $ismoving) {
        echo "</ul><!--class='section'-->\n\n";
    }
}

    /**
     * If dynamic data for this course-module is not yet available, gets it.
     *
     * This function is automatically called when requesting any course_modinfo property
     * that can be modified by modules (have a set_xxx method).
     *
     * Dynamic data is data which does not come directly from the cache but is calculated at
     * runtime based on the current user. Primarily this concerns whether the user can access
     * the module or not.
     *
     * As part of this function, the module's _cm_info_dynamic function from its lib.php will
     * be called (if it exists).
     * @return void
     */
    private function obtain_dynamic_data() {
        global $CFG;
        $userid = $this->modinfo->get_user_id();
        if ($this->state >= self::STATE_BUILDING_DYNAMIC || $userid == -1) {
            return;
        }
        $this->state = self::STATE_BUILDING_DYNAMIC;

        if (!empty($CFG->enableavailability)) {
            require_once($CFG->libdir. '/conditionlib.php');
            // Get availability information
            $ci = new condition_info($this);
            // Note that the modinfo currently available only includes minimal details (basic data)
            // but we know that this function does not need anything more than basic data.
            $this->available = $ci->is_available($this->availableinfo, true,
                    $userid, $this->modinfo);

            // Check parent section
            $parentsection = $this->modinfo->get_section_info($this->sectionnum);
            if (!$parentsection->available) {
                // Do not store info from section here, as that is already
                // presented from the section (if appropriate) - just change
                // the flag
                $this->available = false;
            }
        } else {
            $this->available = true;
        }

        // Update visible state for current user
        $this->update_user_visible();

        // Let module make dynamic changes at this point
        $this->call_mod_function('cm_info_dynamic');
        $this->state = self::STATE_DYNAMIC;
    }

//.........这里部分代码省略.........
        $fromform->groupmode = 0;
        // do not set groupmode
    }
    if (!course_allowed_module($course, $fromform->modulename)) {
        print_error('moduledisable', '', '', $fromform->modulename);
    }
    // first add course_module record because we need the context
    $newcm = new stdClass();
    $newcm->course = $course->id;
    $newcm->module = $fromform->module;
    $newcm->instance = 0;
    // not known yet, will be updated later (this is similar to restore code)
    $newcm->visible = $fromform->visible;
    $newcm->groupmode = $fromform->groupmode;
    $newcm->groupingid = $fromform->groupingid;
    $newcm->groupmembersonly = $fromform->groupmembersonly;
    $completion = new completion_info($course);
    if ($completion->is_enabled()) {
        $newcm->completion = $fromform->completion;
        $newcm->completiongradeitemnumber = $fromform->completiongradeitemnumber;
        $newcm->completionview = $fromform->completionview;
        $newcm->completionexpected = $fromform->completionexpected;
    }
    if (!empty($CFG->enableavailability)) {
        $newcm->availablefrom = $fromform->availablefrom;
        $newcm->availableuntil = $fromform->availableuntil;
        $newcm->showavailability = $fromform->showavailability;
    }
    if (isset($fromform->showdescription)) {
        $newcm->showdescription = $fromform->showdescription;
    } else {
        $newcm->showdescription = 0;
    }
    if (!($fromform->coursemodule = add_course_module($newcm))) {
        print_error('cannotaddcoursemodule');
    }
    if (plugin_supports('mod', $fromform->modulename, FEATURE_MOD_INTRO, true)) {
        $draftid_editor = file_get_submitted_draft_itemid('introeditor');
        file_prepare_draft_area($draftid_editor, null, null, null, null);
        $fromform->introeditor = array('text' => '', 'format' => FORMAT_HTML, 'itemid' => $draftid_editor);
        // TODO: add better default
    }
    if (plugin_supports('mod', $fromform->modulename, FEATURE_MOD_INTRO, true)) {
        $introeditor = $fromform->introeditor;
        unset($fromform->introeditor);
        $fromform->intro = $introeditor['text'];
        $fromform->introformat = $introeditor['format'];
    }
    $addinstancefunction = $fromform->modulename . "_add_instance";
    $updateinstancefunction = $fromform->modulename . "_update_instance";
    $returnfromfunc = $addinstancefunction($fromform, $mform);
    //	$returnfromfunc = url_add_instance($fromform, $mform);
    if (!$returnfromfunc or !is_number($returnfromfunc)) {
        // undo everything we can
        $modcontext = get_context_instance(CONTEXT_MODULE, $fromform->coursemodule);
        delete_context(CONTEXT_MODULE, $fromform->coursemodule);
        $DB->delete_records('course_modules', array('id' => $fromform->coursemodule));
        if (!is_number($returnfromfunc)) {
            print_error('invalidfunction', '', course_get_url($course, $cw->section));
        } else {
            print_error('cannotaddnewmodule', '', course_get_url($course, $cw->section), $fromform->modulename);
        }
    }
    $fromform->instance = $returnfromfunc;
    $DB->set_field('course_modules', 'instance', $returnfromfunc, array('id' => $fromform->coursemodule));
    // update embedded links and save files
    $modcontext = get_context_instance(CONTEXT_MODULE, $fromform->coursemodule);
    if (!empty($introeditor)) {
        $fromform->intro = file_save_draft_area_files($introeditor['itemid'], $modcontext->id, 'mod_' . $fromform->modulename, 'intro', 0, array('subdirs' => true), $introeditor['text']);
        $DB->set_field($fromform->modulename, 'intro', $fromform->intro, array('id' => $fromform->instance));
    }
    // course_modules and course_sections each contain a reference
    // to each other, so we have to update one of them twice.
    $sectionid = add_mod_to_section($fromform);
    $DB->set_field('course_modules', 'section', $sectionid, array('id' => $fromform->coursemodule));
    // make sure visibility is set correctly (in particular in calendar)
    set_coursemodule_visible($fromform->coursemodule, $fromform->visible);
    if (isset($fromform->cmidnumber)) {
        //label
        // set cm idnumber
        set_coursemodule_idnumber($fromform->coursemodule, $fromform->cmidnumber);
    }
    // Set up conditions
    if ($CFG->enableavailability) {
        condition_info::update_cm_from_form((object) array('id' => $fromform->coursemodule), $fromform, false);
    }
    $eventname = 'mod_created';
    add_to_log($course->id, "course", "add mod", "../mod/{$fromform->modulename}/view.php?id={$fromform->coursemodule}", "{$fromform->modulename} {$fromform->instance}");
    add_to_log($course->id, $fromform->modulename, "add", "view.php?id={$fromform->coursemodule}", "{$fromform->instance}", $fromform->coursemodule);
    // Trigger mod_created/mod_updated event with information about this module.
    $eventdata = new stdClass();
    $eventdata->modulename = $fromform->modulename;
    $eventdata->name = $fromform->name;
    $eventdata->cmid = $fromform->coursemodule;
    $eventdata->courseid = $course->id;
    $eventdata->userid = $USER->id;
    events_trigger($eventname, $eventdata);
    rebuild_course_cache($course->id);
    return 1;
}

 /**
  * If dynamic data for this course-module is not yet available, gets it.
  *
  * This function is automatically called when constructing course_modinfo, so users don't
  * need to call it.
  *
  * Dynamic data is data which does not come directly from the cache but is calculated at
  * runtime based on the current user. Primarily this concerns whether the user can access
  * the module or not.
  *
  * As part of this function, the module's _cm_info_dynamic function from its lib.php will
  * be called (if it exists).
  * @return void
  */
 public function obtain_dynamic_data()
 {
     global $CFG;
     if ($this->state >= self::STATE_DYNAMIC) {
         return;
     }
     $userid = $this->modinfo->get_user_id();
     if (!empty($CFG->enableavailability)) {
         // Get availability information
         $ci = new condition_info($this);
         // Note that the modinfo currently available only includes minimal details (basic data)
         // so passing it to this function is a bit dangerous as it would cause infinite
         // recursion if it tried to get dynamic data, however we know that this function only
         // uses basic data.
         $this->available = $ci->is_available($this->availableinfo, true, $userid, $this->modinfo);
     } else {
         $this->available = true;
     }
     // Update visible state for current user
     $this->update_user_visible();
     // Let module make dynamic changes at this point
     $this->call_mod_function('cm_info_dynamic');
     $this->state = self::STATE_DYNAMIC;
 }

 public function definition_after_data()
 {
     global $CFG, $DB;
     $mform = $this->_form;
     $course = $this->_customdata['course'];
     $context = context_course::instance($course->id);
     if (!empty($CFG->enableavailability)) {
         $mform->addElement('header', 'availabilityconditions', get_string('availabilityconditions', 'condition'));
         $mform->setExpanded('availabilityconditions', false);
         // String used by conditions more than once
         $strcondnone = get_string('none', 'condition');
         // Grouping conditions - only if grouping is enabled at site level
         if (!empty($CFG->enablegroupmembersonly)) {
             $options = array();
             if ($groupings = $DB->get_records('groupings', array('courseid' => $course->id))) {
                 foreach ($groupings as $grouping) {
                     $options[$grouping->id] = format_string($grouping->name, true, array('context' => $context));
                 }
             }
             collatorlib::asort($options);
             $options = array(0 => get_string('none')) + $options;
             $mform->addElement('select', 'groupingid', get_string('groupingsection', 'group'), $options);
             $mform->addHelpButton('groupingid', 'groupingsection', 'group');
         }
         // Available from/to defaults to midnight because then the display
         // will be nicer where it tells users when they can access it (it
         // shows only the date and not time).
         $date = usergetdate(time());
         $midnight = make_timestamp($date['year'], $date['mon'], $date['mday']);
         // Date and time conditions.
         $mform->addElement('date_time_selector', 'availablefrom', get_string('availablefrom', 'condition'), array('optional' => true, 'defaulttime' => $midnight));
         $mform->addElement('date_time_selector', 'availableuntil', get_string('availableuntil', 'condition'), array('optional' => true, 'defaulttime' => $midnight));
         // Conditions based on grades
         $gradeoptions = array();
         $items = grade_item::fetch_all(array('courseid' => $course->id));
         $items = $items ? $items : array();
         foreach ($items as $id => $item) {
             $gradeoptions[$id] = $item->get_name();
         }
         asort($gradeoptions);
         $gradeoptions = array(0 => $strcondnone) + $gradeoptions;
         $grouparray = array();
         $grouparray[] = $mform->createElement('select', 'conditiongradeitemid', '', $gradeoptions);
         $grouparray[] = $mform->createElement('static', '', '', ' ' . get_string('grade_atleast', 'condition') . ' ');
         $grouparray[] = $mform->createElement('text', 'conditiongrademin', '', array('size' => 3));
         $grouparray[] = $mform->createElement('static', '', '', '% ' . get_string('grade_upto', 'condition') . ' ');
         $grouparray[] = $mform->createElement('text', 'conditiongrademax', '', array('size' => 3));
         $grouparray[] = $mform->createElement('static', '', '', '%');
         $group = $mform->createElement('group', 'conditiongradegroup', get_string('gradecondition', 'condition'), $grouparray);
         // Get full version (including condition info) of section object
         $ci = new condition_info_section($this->_customdata['cs']);
         $fullcs = $ci->get_full_section();
         $count = count($fullcs->conditionsgrade) + 1;
         // Grade conditions
         $this->repeat_elements(array($group), $count, array('conditiongradegroup[conditiongrademin]' => array('type' => PARAM_RAW), 'conditiongradegroup[conditiongrademax]' => array('type' => PARAM_RAW)), 'conditiongraderepeats', 'conditiongradeadds', 2, get_string('addgrades', 'condition'), true);
         $mform->addHelpButton('conditiongradegroup[0]', 'gradecondition', 'condition');
         // Conditions based on user fields
         $operators = condition_info::get_condition_user_field_operators();
         $useroptions = condition_info::get_condition_user_fields(array('context' => $context));
         asort($useroptions);
         $useroptions = array(0 => $strcondnone) + $useroptions;
         $grouparray = array();
         $grouparray[] =& $mform->createElement('select', 'conditionfield', '', $useroptions);
         $grouparray[] =& $mform->createElement('select', 'conditionfieldoperator', '', $operators);
         $grouparray[] =& $mform->createElement('text', 'conditionfieldvalue');
         $group = $mform->createElement('group', 'conditionfieldgroup', get_string('userfield', 'condition'), $grouparray);
         $fieldcount = count($fullcs->conditionsfield) + 1;
         $this->repeat_elements(array($group), $fieldcount, array('conditionfieldgroup[conditionfieldvalue]' => array('type' => PARAM_RAW)), 'conditionfieldrepeats', 'conditionfieldadds', 2, get_string('adduserfields', 'condition'), true);
         $mform->addHelpButton('conditionfieldgroup[0]', 'userfield', 'condition');
         // Conditions based on completion
         $completion = new completion_info($course);
         if ($completion->is_enabled()) {
             $completionoptions = array();
             $modinfo = get_fast_modinfo($course);
             foreach ($modinfo->cms as $id => $cm) {
                 // Add each course-module if it:
                 // (a) has completion turned on
                 // (b) does not belong to current course-section
                 if ($cm->completion && $fullcs->id != $cm->section) {
                     $completionoptions[$id] = $cm->name;
                 }
             }
             asort($completionoptions);
             $completionoptions = array(0 => $strcondnone) + $completionoptions;
             $completionvalues = array(COMPLETION_COMPLETE => get_string('completion_complete', 'condition'), COMPLETION_INCOMPLETE => get_string('completion_incomplete', 'condition'), COMPLETION_COMPLETE_PASS => get_string('completion_pass', 'condition'), COMPLETION_COMPLETE_FAIL => get_string('completion_fail', 'condition'));
             $grouparray = array();
             $grouparray[] = $mform->createElement('select', 'conditionsourcecmid', '', $completionoptions);
             $grouparray[] = $mform->createElement('select', 'conditionrequiredcompletion', '', $completionvalues);
             $group = $mform->createElement('group', 'conditioncompletiongroup', get_string('completioncondition', 'condition'), $grouparray);
             $count = count($fullcs->conditionscompletion) + 1;
             $this->repeat_elements(array($group), $count, array(), 'conditioncompletionrepeats', 'conditioncompletionadds', 2, get_string('addcompletions', 'condition'), true);
             $mform->addHelpButton('conditioncompletiongroup[0]', 'completionconditionsection', 'condition');
         }
         // Availability conditions - set up form values
         if (!empty($CFG->enableavailability)) {
             $num = 0;
             foreach ($fullcs->conditionsgrade as $gradeitemid => $minmax) {
                 $groupelements = $mform->getElement('conditiongradegroup[' . $num . ']')->getElements();
                 $groupelements[0]->setValue($gradeitemid);
                 $groupelements[2]->setValue(is_null($minmax->min) ? '' : format_float($minmax->min, 5, true, true));
//.........这里部分代码省略.........

             $DB->set_field($fromform->modulename, 'intro', $fromform->intro, array('id' => $fromform->instance));
         }
         // course_modules and course_sections each contain a reference
         // to each other, so we have to update one of them twice.
         $sectionid = add_mod_to_section($fromform);
         $DB->set_field('course_modules', 'section', $sectionid, array('id' => $fromform->coursemodule));
         // make sure visibility is set correctly (in particular in calendar)
         set_coursemodule_visible($fromform->coursemodule, $fromform->visible);
         if (isset($fromform->cmidnumber)) {
             //label
             // set cm idnumber - uniqueness is already verified by form validation
             set_coursemodule_idnumber($fromform->coursemodule, $fromform->cmidnumber);
         }
         // Set up conditions
         if ($CFG->enableavailability) {
             condition_info::update_cm_from_form((object) array('id' => $fromform->coursemodule), $fromform, false);
         }
         // Trigger mod_created event with information about this module.
         $eventdata = new stdClass();
         $eventdata->modulename = $fromform->modulename;
         $eventdata->name = $fromform->name;
         $eventdata->cmid = $fromform->coursemodule;
         $eventdata->courseid = $course->id;
         $eventdata->userid = $USER->id;
         events_trigger('mod_created', $eventdata);
         add_to_log($course->id, "course", "add mod", "../mod/{$fromform->modulename}/view.php?id={$fromform->coursemodule}", "{$fromform->modulename} {$fromform->instance}");
         add_to_log($course->id, $fromform->modulename, "add", "view.php?id={$fromform->coursemodule}", "{$fromform->instance}", $fromform->coursemodule);
     } else {
         print_error('invaliddata');
     }
 }

 function get_course_mods($id, $username = '')
 {
     global $CFG, $DB;
     $username = utf8_decode($username);
     $username = strtolower($username);
     if ($username) {
         $user = get_complete_user_data('username', $username);
     }
     $sections = get_all_sections($id);
     $forum = forum_get_course_forum($id, 'news');
     $news_forum_id = $forum->id;
     get_all_mods($id, $mods, $modnames, $modnamesplural, $modnamesused);
     $context = get_context_instance(CONTEXT_COURSE, $id);
     $e = array();
     foreach ($sections as $section) {
         if (!$section->visible) {
             continue;
         }
         $sectionmods = explode(",", $section->sequence);
         foreach ($sectionmods as $modnumber) {
             if (empty($mods[$modnumber])) {
                 continue;
             }
             $mod = $mods[$modnumber];
             $resource['completion_info'] = '';
             if ($username) {
                 $cm = get_coursemodule_from_id(false, $mod->id);
                 if (!coursemodule_visible_for_user($cm, $user->id)) {
                     if (!$mod->showavailability) {
                         // Mod not visible, and no completion info to show
                         continue;
                     }
                     $resource['available'] = 0;
                     $ci = new condition_info($mod);
                     $resource['completion_info'] = $ci->get_full_information();
                 } else {
                     $resource['available'] = 1;
                 }
             } else {
                 $resource['available'] = 1;
             }
             $e[$section->section]['section'] = $section->section;
             $e[$section->section]['name'] = $section->name;
             $e[$section->section]['summary'] = file_rewrite_pluginfile_urls($section->summary, 'pluginfile.php', $context->id, 'course', 'section', $section->id);
             $e[$section->section]['summary'] = str_replace('pluginfile.php', '/auth/joomdle/pluginfile_joomdle.php', $e[$section->section]['summary']);
             $resource['id'] = $mod->id;
             $resource['name'] = $mod->name;
             $resource['mod'] = $mod->modname;
             // Format for mod->icon is: f/type-24
             $type = substr($mod->icon, 2);
             $parts = explode('-', $type);
             $type = $parts[0];
             $resource['type'] = $type;
             //In forum, type is unused, so we use it for forum type: news/general
             if ($mod->modname == 'forum') {
                 $cm = get_coursemodule_from_id('forum', $mod->id);
                 if ($cm->instance == $news_forum_id) {
                     $resource['type'] = 'news';
                 }
             }
             $e[$section->section]['mods'][] = $resource;
         }
     }
     return $e;
 }

//.........这里部分代码省略.........
        if (file_exists($CFG->dataroot . '/' . SITEID . '/maintenance.html')) {
            print_maintenance_message();
            exit;
        }
    }
    /// groupmembersonly access control
    if (!empty($CFG->enablegroupings) and $cm and $cm->groupmembersonly and !has_capability('moodle/site:accessallgroups', get_context_instance(CONTEXT_MODULE, $cm->id))) {
        if (isguestuser() or !groups_has_membership($cm)) {
            print_error('groupmembersonlyerror', 'group', $CFG->wwwroot . '/course/view.php?id=' . $cm->course);
        }
    }
    // Fetch the course context, and prefetch its child contexts
    if (!isset($COURSE->context)) {
        if (!($COURSE->context = get_context_instance(CONTEXT_COURSE, $COURSE->id))) {
            print_error('nocontext');
        }
    }
    if (!empty($cm) && !isset($cm->context)) {
        if (!($cm->context = get_context_instance(CONTEXT_MODULE, $cm->id))) {
            print_error('nocontext');
        }
    }
    // Conditional activity access control
    if (!empty($CFG->enableavailability) and $cm) {
        // We cache conditional access in session
        if (!isset($SESSION->conditionaccessok)) {
            $SESSION->conditionaccessok = array();
        }
        // If you have been allowed into the module once then you are allowed
        // in for rest of session, no need to do conditional checks
        if (!array_key_exists($cm->id, $SESSION->conditionaccessok)) {
            // Get condition info (does a query for the availability table)
            require_once $CFG->libdir . '/conditionlib.php';
            $ci = new condition_info($cm, CONDITION_MISSING_EXTRATABLE);
            // Check condition for user (this will do a query if the availability
            // information depends on grade or completion information)
            if ($ci->is_available($junk) || has_capability('moodle/course:viewhiddenactivities', $cm->context)) {
                $SESSION->conditionaccessok[$cm->id] = true;
            } else {
                print_error('activityiscurrentlyhidden');
            }
        }
    }
    if ($COURSE->id == SITEID) {
        /// Eliminate hidden site activities straight away
        if (!empty($cm) && !$cm->visible && !has_capability('moodle/course:viewhiddenactivities', $cm->context)) {
            redirect($CFG->wwwroot, get_string('activityiscurrentlyhidden'));
        }
        user_accesstime_log($COURSE->id);
        /// Access granted, update lastaccess times
        return;
    } else {
        /// Check if the user can be in a particular course
        if (empty($USER->access['rsw'][$COURSE->context->path])) {
            //
            // MDL-13900 - If the course or the parent category are hidden
            // and the user hasn't the 'course:viewhiddencourses' capability, prevent access
            //
            if (!($COURSE->visible && course_parent_visible($COURSE)) && !has_capability('moodle/course:viewhiddencourses', $COURSE->context)) {
                print_header_simple();
                notice(get_string('coursehidden'), $CFG->wwwroot . '/');
            }
        }
        /// Non-guests who don't currently have access, check if they can be allowed in as a guest
        if ($USER->username != 'guest' and !has_capability('moodle/course:view', $COURSE->context)) {
            if ($COURSE->guest == 1) {

 /**
  * Checks whether a user can be subscribed to the forum, regardless of
  * subscription option. Includes a variety of other checks. [These are
  * supposed to be the same as checks done when building the list of people
  * for email.]
  * @param int $userid User ID or 0 for current
  * @return bool True if user can be subscribed
  */
 private function can_be_subscribed($userid = 0)
 {
     global $USER;
     $userid = mod_forumng_utils::get_real_userid($userid);
     $cm = $this->get_course_module();
     $course = $this->get_course();
     $context = $this->get_context();
     // Guests cannot subscribe
     if (!isloggedin() || isguestuser($userid)) {
         return false;
     }
     // Get from cache if possible
     if (!isset($this->cache->can_be_subscribed)) {
         $this->cache->can_be_subscribed = array();
     }
     if (array_key_exists($userid, $this->cache->can_be_subscribed)) {
         return $this->cache->can_be_subscribed[$userid];
     }
     // This is not a loop, just so I can use break
     do {
         // Check user can see forum
         if (!has_capability('mod/forumng:viewdiscussion', $context, $userid)) {
             $result = false;
             break;
         }
         // For current user, can take shortcut
         if ($userid == $USER->id) {
             if (empty($cm->uservisible)) {
                 $uservisible = false;
             } else {
                 $uservisible = true;
             }
             if (!$uservisible) {
                 $result = false;
                 break;
             }
         } else {
             $visible = $cm->visible;
             // Note: It is pretty terrible that this code is placed here.
             // Shouldn't there be a function in cm_info to do this? :(
             // Unfortunately I didn't think of that when redesigning
             // cm_info, it can only work for current user.
             $conditioninfo = new condition_info($cm);
             $visible = $visible && $conditioninfo->is_available($crap, false, $userid);
             if (!$visible && !has_capability('moodle/site:viewhiddenactivities', $context, $userid)) {
                 $result = false;
                 break;
             }
             if ($cm->groupmembersonly && !has_capability('moodle/site:accessallgroups', $context, $userid)) {
                 // If the forum is restricted to group members only, then
                 // limit it to people within groups on the course - or
                 // groups in the grouping, if one is selected
                 $groupobjs = groups_get_all_groups($course->id, $userid, $cm->groupingid, 'g.id');
                 if (!$groupobjs || count($groupobjs) == 0) {
                     $result = false;
                     break;
                 }
             }
         }
         $result = true;
         break;
     } while (false);
     $this->cache->can_be_subscribed[$userid] = $result;
     return $result;
 }

 /**
  * Adds all the standard elements to a form to edit the settings for an activity module.
  */
 function standard_coursemodule_elements()
 {
     global $COURSE, $CFG, $DB;
     $mform =& $this->_form;
     $outcomesused = false;
     if ($this->_features->outcomes) {
         if ($outcomes = grade_outcome::fetch_all_available($COURSE->id)) {
             $outcomesused = true;
             $mform->addElement('header', 'modoutcomes', get_string('outcomes', 'grades'));
             foreach ($outcomes as $outcome) {
                 $mform->addElement('advcheckbox', 'outcome_' . $outcome->id, $outcome->get_name());
             }
         }
     }
     $mform->addElement('header', 'modstandardelshdr', get_string('modstandardels', 'form'));
     if ($this->_features->groups) {
         $options = array(NOGROUPS => get_string('groupsnone'), SEPARATEGROUPS => get_string('groupsseparate'), VISIBLEGROUPS => get_string('groupsvisible'));
         $mform->addElement('select', 'groupmode', get_string('groupmode'), $options, NOGROUPS);
         $mform->setHelpButton('groupmode', array('groupmode', get_string('groupmode')));
     }
     if (!empty($CFG->enablegroupings)) {
         if ($this->_features->groupings or $this->_features->groupmembersonly) {
             //groupings selector - used for normal grouping mode or also when restricting access with groupmembersonly
             $options = array();
             $options[0] = get_string('none');
             if ($groupings = $DB->get_records('groupings', array('courseid' => $COURSE->id))) {
                 foreach ($groupings as $grouping) {
                     $options[$grouping->id] = format_string($grouping->name);
                 }
             }
             $mform->addElement('select', 'groupingid', get_string('grouping', 'group'), $options);
             $mform->setHelpButton('groupingid', array('grouping', get_string('grouping', 'group')));
             $mform->setAdvanced('groupingid');
         }
         if ($this->_features->groupmembersonly) {
             $mform->addElement('checkbox', 'groupmembersonly', get_string('groupmembersonly', 'group'));
             $mform->setHelpButton('groupmembersonly', array('groupmembersonly', get_string('groupmembersonly', 'group')));
             $mform->setAdvanced('groupmembersonly');
         }
     }
     $mform->addElement('modvisible', 'visible', get_string('visible'));
     if ($this->_features->idnumber) {
         $mform->addElement('text', 'cmidnumber', get_string('idnumbermod'));
         $mform->setHelpButton('cmidnumber', array('cmidnumber', get_string('idnumbermod')), true);
     }
     if ($this->_features->gradecat) {
         $categories = grade_get_categories_menu($COURSE->id, $outcomesused);
         $mform->addElement('select', 'gradecat', get_string('gradecategory', 'grades'), $categories);
     }
     if (!empty($CFG->enableavailability)) {
         // Conditional availability
         $mform->addElement('header', '', get_string('availabilityconditions', 'condition'));
         $mform->addElement('date_selector', 'availablefrom', get_string('availablefrom', 'condition'), array('optional' => true));
         $mform->setHelpButton('availablefrom', array('conditiondates', get_string('help_conditiondates', 'condition'), 'condition'));
         $mform->addElement('date_selector', 'availableuntil', get_string('availableuntil', 'condition'), array('optional' => true));
         $mform->setHelpButton('availableuntil', array('conditiondates', get_string('help_conditiondates', 'condition'), 'condition'));
         // Conditions based on grades
         $gradeoptions = array();
         $items = grade_item::fetch_all(array('courseid' => $COURSE->id));
         $items = $items ? $items : array();
         foreach ($items as $id => $item) {
             // Do not include grades for current item
             if (!empty($this->_cm) && $this->_cm->instance == $item->iteminstance && $this->_cm->modname == $item->itemmodule && $item->itemtype == 'mod') {
                 continue;
             }
             $gradeoptions[$id] = $item->get_name();
         }
         asort($gradeoptions);
         $gradeoptions = array(0 => get_string('none', 'condition')) + $gradeoptions;
         $grouparray = array();
         $grouparray[] =& $mform->createElement('select', 'conditiongradeitemid', '', $gradeoptions);
         $grouparray[] =& $mform->createElement('static', '', '', ' ' . get_string(