Merge branch 'wip-MDL-35260-master' of git://github.com/marinaglancy/moodle

admin/courseformats.php

@@ -0,0 +1,131 @@
+<?php
+// This file is part of Moodle - http://moodle.org/
+//
+// Moodle is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Moodle is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
+/**
+ * Allows the admin to enable, disable and uninstall course formats
+ *
+ * @package    core_admin
+ * @copyright  2012 Marina Glancy
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+require_once('../config.php');
+require_once($CFG->libdir.'/adminlib.php');
+require_once($CFG->libdir.'/pluginlib.php');
+
+$action  = required_param('action', PARAM_ALPHANUMEXT);
+$formatname   = required_param('format', PARAM_PLUGIN);
+$confirm = optional_param('confirm', 0, PARAM_BOOL);
+
+$syscontext = context_system::instance();
+$PAGE->set_url('/admin/courseformats.php');
+$PAGE->set_context($syscontext);
+
+require_login();
+require_capability('moodle/site:config', $syscontext);
+require_sesskey();
+
+$return = new moodle_url('/admin/settings.php', array('section' => 'manageformats'));
+
+$allplugins = plugin_manager::instance()->get_plugins();
+$formatplugins = $allplugins['format'];
+$sortorder = array_flip(array_keys($formatplugins));
+
+if (!isset($formatplugins[$formatname])) {
+    print_error('courseformatnotfound', 'error', $return, $formatname);
+}
+
+switch ($action) {
+    case 'disable':
+        if ($formatplugins[$formatname]->is_enabled()) {
+            if (get_config('moodlecourse', 'format') === $formatname) {
+                print_error('cannotdisableformat', 'error', $return);
+            }
+            set_config('disabled', 1, 'format_'. $formatname);
+        }
+        break;
+    case 'enable':
+        if (!$formatplugins[$formatname]->is_enabled()) {
+            unset_config('disabled', 'format_'. $formatname);
+        }
+        break;
+    case 'up':
+        if ($sortorder[$formatname]) {
+            $currentindex = $sortorder[$formatname];
+            $seq = array_keys($formatplugins);
+            $seq[$currentindex] = $seq[$currentindex-1];
+            $seq[$currentindex-1] = $formatname;
+            set_config('format_plugins_sortorder', implode(',', $seq));
+        }
+        break;
+    case 'down':
+        if ($sortorder[$formatname] < count($sortorder)-1) {
+            $currentindex = $sortorder[$formatname];
+            $seq = array_keys($formatplugins);
+            $seq[$currentindex] = $seq[$currentindex+1];
+            $seq[$currentindex+1] = $formatname;
+            set_config('format_plugins_sortorder', implode(',', $seq));
+        }
+        break;
+    case 'uninstall':
+        echo $OUTPUT->header();
+        echo $OUTPUT->heading(get_string('courseformats', 'moodle'));
+
+        $coursecount = $DB->count_records('course', array('format' => $formatname));
+        if ($coursecount) {
+            // Check that default format is set. It will be used to convert courses
+            // using this format
+            $defaultformat = get_config('moodlecourse', 'format');
+            $defaultformat = $formatplugins[get_config('moodlecourse', 'format')];
+            if (!$defaultformat) {
+                echo $OUTPUT->error_text(get_string('defaultformatnotset', 'admin'));
+                echo $OUTPUT->footer();
+                exit;
+            }
+        }
+
+        $format = $formatplugins[$formatname];
+        $deleteurl = $format->get_uninstall_url();
+        if (!$deleteurl) {
+            // somebody was trying to cheat and type non-existing link
+            echo $OUTPUT->error_text(get_string('cannotuninstall', 'admin', $format->displayname));
+            echo $OUTPUT->footer();
+            exit;
+        }
+
+        if (!$confirm) {
+            if ($coursecount) {
+                $message = get_string('formatuninstallwithcourses', 'admin',
+                        (object)array('count' => $coursecount, 'format' => $format->displayname,
+                            'defaultformat' => $defaultformat->displayname));
+            } else {
+                $message = get_string('formatuninstallconfirm', 'admin', $format->displayname);
+            }
+            $deleteurl->param('confirm', 1);
+            echo $OUTPUT->confirm($message, $deleteurl, $return);            
+        } else {
+            $a = new stdClass();
+            $a->plugin = $format->displayname;
+            $a->directory = $format->rootdir;
+            uninstall_plugin('format', $formatname);
+            echo $OUTPUT->notification(get_string('formatuninstalled', 'admin', $a), 'notifysuccess');
+            echo $OUTPUT->continue_button($return);
+        }
+
+        echo $OUTPUT->footer();
+        exit;
+}
+redirect($return);

admin/settings/courses.php

@@ -15,9 +15,10 @@ if ($hassiteconfig
 /// NOTE: these settings must be applied after all other settings because they depend on them
     ///main course settings
     $temp = new admin_settingpage('coursesettings', new lang_string('coursesettings'));
-    $courseformats = get_plugin_list('format');
+    require_once($CFG->dirroot.'/course/lib.php');
+    $courseformats = get_sorted_course_formats(true);
     $formcourseformats = array();
-    foreach ($courseformats as $courseformat => $courseformatdir) {
+    foreach ($courseformats as $courseformat) {
         $formcourseformats[$courseformat] = new lang_string('pluginname', "format_$courseformat");
     }
     $temp->add(new admin_setting_configselect('moodlecourse/format', new lang_string('format'), new lang_string('coursehelpformat'), 'weeks',$formcourseformats));

admin/settings/plugins.php

@@ -20,6 +20,15 @@ if ($hassiteconfig) {
     // hidden script for converting journals to online assignments (or something like that) linked from elsewhere
     $ADMIN->add('modsettings', new admin_externalpage('oacleanup', 'Online Assignment Cleanup', $CFG->wwwroot.'/'.$CFG->admin.'/oacleanup.php', 'moodle/site:config', true));
 
+    // course formats
+    $ADMIN->add('modules', new admin_category('formatsettings', new lang_string('courseformats')));
+    $temp = new admin_settingpage('manageformats', new lang_string('manageformats', 'core_admin'));
+    $temp->add(new admin_setting_manageformats());
+    $ADMIN->add('formatsettings', $temp);
+    foreach ($allplugins['format'] as $format) {
+        $format->load_settings($ADMIN, 'formatsettings', $hassiteconfig);
+    }
+
     // blocks
     $ADMIN->add('modules', new admin_category('blocksettings', new lang_string('blocks')));
     $ADMIN->add('blocksettings', new admin_page_manageblocks());

course/edit_form.php

@@ -113,11 +113,20 @@ class course_edit_form extends moodleform {
             $mform->hardFreeze('summary_editor');
         }
 
-        $courseformats = get_plugin_list('format');
+        $courseformats = get_sorted_course_formats(true);
         $formcourseformats = array();
-        foreach ($courseformats as $courseformat => $formatdir) {
+        foreach ($courseformats as $courseformat) {
             $formcourseformats[$courseformat] = get_string('pluginname', "format_$courseformat");
         }
+        if (isset($course->format)) {
+            $course->format = course_get_format($course)->get_format(); // replace with default if not found
+            if (!in_array($course->format, $courseformats)) {
+                // this format is disabled. Still display it in the dropdown
+                $formcourseformats[$course->format] = get_string('withdisablednote', 'moodle',
+                        get_string('pluginname', 'format_'.$course->format));
+            }
+        }
+
         $mform->addElement('select', 'format', get_string('format'), $formcourseformats);
         $mform->addHelpButton('format', 'format');
         $mform->setDefault('format', $courseconfig->format);

course/format/formatlegacy.php

@@ -339,9 +339,21 @@ class format_legacy extends format_base {
         if ($oldcourse !== null) {
             $data = (array)$data;
             $oldcourse = (array)$oldcourse;
-            foreach ($this->course_format_options() as $key => $unused) {
+            $options = $this->course_format_options();
-                if (array_key_exists($key, $oldcourse) && !array_key_exists($key, $data)) {
+            foreach ($options as $key => $unused) {
-                    $data[$key] = $oldcourse[$key];
+                if (!array_key_exists($key, $data)) {
+                    if (array_key_exists($key, $oldcourse)) {
+                        $data[$key] = $oldcourse[$key];
+                    } else if ($key === 'numsections') {
+                        // If previous format does not have the field 'numsections' and this one does,
+                        // and $data['numsections'] is not set fill it with the maximum section number from the DB
+                        $maxsection = $DB->get_field_sql('SELECT max(section) from {course_sections}
+                            WHERE course = ?', array($this->courseid));
+                        if ($maxsection) {
+                            // If there are no sections, or just default 0-section, 'numsections' will be set to default
+                            $data['numsections'] = $maxsection;
+                        }
+                    }
                 }
             }
         }

course/format/lib.php

@@ -97,13 +97,21 @@ abstract class format_base {
         if ($format === 'site') {
             return $format;
         }
-        $plugins = get_plugin_list('format'); // TODO MDL-35260 filter only enabled
+        $plugins = get_sorted_course_formats();
-        if (isset($plugins[$format])) {
+        if (in_array($format, $plugins)) {
             return $format;
         }
         // Else return default format
-        $defaultformat = reset($plugins); // TODO MDL-35260 get default format from config
+        $defaultformat = get_config('moodlecourse', 'format');
-        debugging('Format plugin format_'.$format.' is not found or is not enabled. Using default format_'.$defaultformat, DEBUG_DEVELOPER);
+        if (!in_array($defaultformat, $plugins)) {
+            // when default format is not set correctly, use the first available format
+            $defaultformat = reset($plugins);
+        }
+        static $warningprinted = array();
+        if (empty($warningprinted[$format])) {
+            debugging('Format plugin format_'.$format.' is not found. Using default format_'.$defaultformat, DEBUG_DEVELOPER);
+            $warningprinted[$format] = true;
+        }
         return $defaultformat;
     }
 

course/format/upgrade.txt

@@ -12,6 +12,7 @@ format.
   functions callback_XXXX_request_key() are no longer used (where XXXX is the course format name)
 * functions get_generic_section_name(), get_all_sections(), add_mod_to_section(), get_all_mods()
   are deprecated. See their phpdocs in lib/deprecatedlib.php on how to replace them
+* Course formats may now have their settings.php file as the most of other plugin types
 
 === 2.3 ===
 

course/lib.php

@@ -4512,6 +4512,35 @@ function include_course_ajax($course, $usedmodules = array(), $enabledmodules =
     return true;
 }
 
+/**
+ * Returns the sorted list of available course formats, filtered by enabled if necessary
+ *
+ * @param bool $enabledonly return only formats that are enabled
+ * @return array array of sorted format names
+ */
+function get_sorted_course_formats($enabledonly = false) {
+    global $CFG;
+    $formats = get_plugin_list('format');
+
+    if (!empty($CFG->format_plugins_sortorder)) {
+        $order = explode(',', $CFG->format_plugins_sortorder);
+        $order = array_merge(array_intersect($order, array_keys($formats)),
+                    array_diff(array_keys($formats), $order));
+    } else {
+        $order = array_keys($formats);
+    }
+    if (!$enabledonly) {
+        return $order;
+    }
+    $sortedformats = array();
+    foreach ($order as $formatname) {
+        if (!get_config('format_'.$formatname, 'disabled')) {
+            $sortedformats[] = $formatname;
+        }
+    }
+    return $sortedformats;
+}
+
 /**
  * The URL to use for the specified course (with section)
  *

lang/en/admin.php

@@ -95,6 +95,7 @@ $string['calendarexportsalt'] = 'Calendar export salt';
 $string['calendarsettings'] = 'Calendar';
 $string['calendar_weekend'] = 'Weekend days';
 $string['cannotdeletemodfilter'] = 'You cannot uninstall the \'{$a->filter}\' because it is part of the \'{$a->module}\' module.';
+$string['cannotuninstall'] = '{$a} can not be uninstalled.';
 $string['cfgwwwrootslashwarning'] = 'You have defined $CFG->wwwroot incorrectly in your config.php file. You have included a \'/\' character at the end. Please remove it, or you will experience strange bugs like <a href=\'http://tracker.moodle.org/browse/MDL-11061\'>MDL-11061</a>.';
 $string['cfgwwwrootwarning'] = 'You have defined $CFG->wwwroot incorrectly in your config.php file. It does not match the URL you are using to access this page. Please correct it, or you will experience strange bugs like <a href=\'http://tracker.moodle.org/browse/MDL-11061\'>MDL-11061</a>.';
 $string['clamfailureonupload'] = 'On clam AV failure';
@@ -417,6 +418,7 @@ $string['debugstringids_desc'] = 'This option is designed to help translators. W
 $string['debugvalidators'] = 'Show validator links';
 $string['defaultcity'] = 'Default city';
 $string['defaultcity_help'] = 'A city entered here will be the default city when creating new user accounts.';
+$string['defaultformatnotset'] = 'Error determining default course format. Please check site settings.';
 $string['defaulthomepage'] = 'Default home page for users';
 $string['defaultrequestcategory'] = 'Default category for course requests';
 $string['defaultsettinginfo'] = 'Default: {$a}';
@@ -533,6 +535,9 @@ $string['forceloginforprofileimage'] = 'Force users to login to view user pictur
 $string['forceloginforprofileimage_help'] = 'If enabled, users must login in order to view user profile pictures and the default user picture will be used in all notification emails.';
 $string['forceloginforprofiles'] = 'Force users to login for profiles';
 $string['forcetimezone'] = 'Force default timezone';
+$string['formatuninstallwithcourses'] = 'There are {$a->count} courses using {$a->format}. Their format will be changed to {$a->defaultformat} (default format for this site). Some format-specific data may be lost. Are you sure you want to proceed?';
+$string['formatuninstallconfirm'] = '{$a} will be uninstalled. No courses currently use it. Continue?';
+$string['formatuninstalled'] = 'All data associated with the format plugin \'{$a->plugin}\' has been deleted from the database.  To complete the deletion (and prevent the plugin re-installing itself), you should now delete this directory from your server: {$a->directory}';
 $string['frontpage'] = 'Front page';
 $string['frontpagebackup'] = 'Front page backup';
 $string['frontpagedefaultrole'] = 'Default frontpage role';
@@ -641,6 +646,8 @@ $string['longtimewarning'] = '<b>Please note that this process can take a long t
 $string['maintenancemode'] = 'In maintenance mode';
 $string['maintfileopenerror'] = 'Error opening maintenance files!';
 $string['maintinprogress'] = 'Maintenance is in progress...';
+$string['manageformats'] = 'Manage course formats';
+$string['manageformatsgotosettings'] = 'Default format can be changed in {$a}';
 $string['managelang'] = 'Manage';
 $string['managelicenses'] = 'Manage licences';
 $string['manageqbehaviours'] = 'Manage question behaviours';

lang/en/error.php

@@ -65,6 +65,7 @@ $string['cannotdeletefile'] = 'Cannot delete this file';
 $string['cannotdeleterole'] = 'It cannot be deleted, because {$a}';
 $string['cannotdeleterolewithid'] = 'Could not delete role with ID {$a}';
 $string['cannotdeletethisrole'] = 'You cannot delete this role because it is used by the system, or because it is the last role with administrator capabilities.';
+$string['cannotdisableformat'] = 'You can not disable the default format';
 $string['cannotdownloadcomponents'] = 'Cannot download components';
 $string['cannotdownloadlanguageupdatelist'] = 'Cannot download list of language updates from download.moodle.org';
 $string['cannotdownloadzipfile'] = 'Cannot download ZIP file';

lang/en/moodle.php

@@ -297,7 +297,7 @@ $string['coursecompletions'] = 'Course completions';
 $string['coursecreators'] = 'Course creator';
 $string['coursecreatorsdescription'] = 'Course creators can create new courses.';
 $string['coursedisplay'] = 'Course layout';
-$string['coursedisplay_help'] = 'This setting determines whether the whole course is displayed on one page or split over several pages. The setting has no affect on certain course formats, such as SCORM format.';
+$string['coursedisplay_help'] = 'This setting determines whether the whole course is displayed on one page or split over several pages.';
 $string['coursedisplay_single'] = 'Show all sections on one page';
 $string['coursedisplay_multi'] = 'Show one section per page';
 $string['coursedeleted'] = 'Deleted course {$a}';
@@ -1805,6 +1805,7 @@ $string['whattocallzip'] = 'What do you want to call the zip file?';
 $string['whattodo'] = 'What to do';
 $string['windowclosing'] = 'This window should close automatically. If not, please close it now.';
 $string['withchosenfiles'] = 'With chosen files';
+$string['withdisablednote'] = '{$a} (disabled)';
 $string['withoutuserdata'] = 'without user data';
 $string['withselectedusers'] = 'With selected users...';
 $string['withselectedusers_help'] = '* Send message - For sending a message to one or more participants

lib/adminlib.php

@@ -266,6 +266,16 @@ function uninstall_plugin($type, $name) {
             // Delete block
             $DB->delete_records('block', array('id'=>$block->id));
         }
+    } else if ($type === 'format') {
+        if (($defaultformat = get_config('moodlecourse', 'format')) && $defaultformat !== $name) {
+            $courses = $DB->get_records('course', array('format' => $name), 'id');
+            $data = (object)array('id' => null, 'format' => $defaultformat);
+            foreach ($courses as $record) {
+                $data->id = $record->id;
+                update_course($data);
+            }
+        }
+        $DB->delete_records('course_format_options', array('format' => $name));
     }
 
     // perform clean-up task common for all the plugin/subplugin types
@@ -5897,6 +5907,147 @@ class admin_setting_managelicenses extends admin_setting {
     }
 }
 
+/**
+ * Course formats manager. Allows to enable/disable formats and jump to settings
+ */
+class admin_setting_manageformats extends admin_setting {
+
+    /**
+     * Calls parent::__construct with specific arguments
+     */
+    public function __construct() {
+        $this->nosave = true;
+        parent::__construct('formatsui', new lang_string('manageformats', 'core_admin'), '', '');
+    }
+
+    /**
+     * Always returns true
+     *
+     * @return true
+     */
+    public function get_setting() {
+        return true;
+    }
+
+    /**
+     * Always returns true
+     *
+     * @return true
+     */
+    public function get_defaultsetting() {
+        return true;
+    }
+
+    /**
+     * Always returns '' and doesn't write anything
+     *
+     * @param mixed $data string or array, must not be NULL
+     * @return string Always returns ''
+     */
+    public function write_setting($data) {
+        // do not write any setting
+        return '';
+    }
+
+    /**
+     * Search to find if Query is related to format plugin
+     *
+     * @param string $query The string to search for
+     * @return bool true for related false for not
+     */
+    public function is_related($query) {
+        if (parent::is_related($query)) {
+            return true;
+        }
+        $allplugins = plugin_manager::instance()->get_plugins();
+        $formats = $allplugins['format'];
+        foreach ($formats as $format) {
+            if (strpos($format->component, $query) !== false ||
+                    strpos(textlib::strtolower($format->displayname), $query) !== false) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    /**
+     * Return XHTML to display control
+     *
+     * @param mixed $data Unused
+     * @param string $query
+     * @return string highlight
+     */
+    public function output_html($data, $query='') {
+        global $CFG, $OUTPUT;
+        $return = '';
+        $return = $OUTPUT->heading(new lang_string('courseformats'), 3, 'main');
+        $return .= $OUTPUT->box_start('generalbox formatsui');
+
+        $allplugins = plugin_manager::instance()->get_plugins();
+        $formats = $allplugins['format'];
+
+        // display strings
+        $txt = get_strings(array('settings', 'name', 'enable', 'disable', 'up', 'down', 'default', 'delete'));
+        $txt->updown = "$txt->up/$txt->down";
+
+        $table = new html_table();
+        $table->head  = array($txt->name, $txt->enable, $txt->updown, $txt->delete, $txt->settings);
+        $table->align = array('left', 'center', 'center', 'center', 'center');
+        $table->width = '90%';
+        $table->attributes['class'] = 'manageformattable generaltable';
+        $table->data  = array();
+
+        $cnt = 0;
+        $defaultformat = get_config('moodlecourse', 'format');
+        $spacer = $OUTPUT->pix_icon('spacer', '', 'moodle', array('class' => 'icon'));
+        foreach ($formats as $format) {
+            $url = new moodle_url('/admin/courseformats.php',
+                    array('sesskey' => sesskey(), 'format' => $format->name));
+            $isdefault = '';
+            if ($format->is_enabled()) {
+                $strformatname = html_writer::tag('span', $format->displayname);
+                if ($defaultformat === $format->name) {
+                    $hideshow = $txt->default;
+                } else {
+                    $hideshow = html_writer::link($url->out(false, array('action' => 'disable')),
+                            $OUTPUT->pix_icon('i/hide', $txt->disable, 'moodle', array('class' => 'icon')));
+                }
+            } else {
+                $strformatname = html_writer::tag('span', $format->displayname, array('class' => 'dimmed_text'));
+                $hideshow = html_writer::link($url->out(false, array('action' => 'enable')),
+                    $OUTPUT->pix_icon('i/show', $txt->enable, 'moodle', array('class' => 'icon')));
+            }
+            $updown = '';
+            if ($cnt) {
+                $updown .= html_writer::link($url->out(false, array('action' => 'up')),
+                    $OUTPUT->pix_icon('t/up', $txt->up, 'moodle')). ' ';
+            } else {
+                $updown .= $spacer;
+            }
+            if ($cnt < count($formats) - 1) {
+                $updown .= '&nbsp;'.html_writer::link($url->out(false, array('action' => 'down')),
+                    $OUTPUT->pix_icon('t/down', $txt->down, 'moodle'));
+            } else {
+                $updown .= $spacer;
+            }
+            $cnt++;
+            $settings = '';
+            if ($format->get_settings_url()) {
+                $settings = html_writer::link($format->get_settings_url(), $txt->settings);
+            }
+            $uninstall = '';
+            if ($defaultformat !== $format->name) {
+                $uninstall = html_writer::link($format->get_uninstall_url(), $txt->delete);
+            }
+            $table->data[] =array($strformatname, $hideshow, $updown, $uninstall, $settings);
+        }
+        $return .= html_writer::table($table);
+        $link = html_writer::link(new moodle_url('/admin/settings.php', array('section' => 'coursesettings')), new lang_string('coursesettings'));
+        $return .= html_writer::tag('p', get_string('manageformatsgotosettings', 'admin', $link));
+        $return .= $OUTPUT->box_end();
+        return highlight($query, $return);
+    }
+}
 
 /**
  * Special class for filter administration.

lib/moodlelib.php

@@ -4572,7 +4572,8 @@ function delete_course($courseorid, $showfeedback = true) {
     // which should know about this updated property, as this event is meant to pass the full course record
     $course->timemodified = time();
 
-    $DB->delete_records("course", array("id"=>$courseid));
+    $DB->delete_records("course", array("id" => $courseid));
+    $DB->delete_records("course_format_options", array("courseid" => $courseid));
 
     //trigger events
     $course->context = $context; // you can not fetch context in the event because it was already deleted

lib/pluginlib.php

@@ -3362,3 +3362,61 @@ class plugininfo_webservice extends plugininfo_base {
                 array('sesskey' => sesskey(), 'action' => 'uninstall', 'webservice' => $this->name));
     }
 }
+
+/**
+ * Class for course formats
+ */
+class plugininfo_format extends plugininfo_base {
+
+    /**
+     * Gathers and returns the information about all plugins of the given type
+     *
+     * @param string $type the name of the plugintype, eg. mod, auth or workshopform
+     * @param string $typerootdir full path to the location of the plugin dir
+     * @param string $typeclass the name of the actually called class
+     * @return array of plugintype classes, indexed by the plugin name
+     */
+    public static function get_plugins($type, $typerootdir, $typeclass) {
+        global $CFG;
+        $formats = parent::get_plugins($type, $typerootdir, $typeclass);
+        require_once($CFG->dirroot.'/course/lib.php');
+        $order = get_sorted_course_formats();
+        $sortedformats = array();
+        foreach ($order as $formatname) {
+            $sortedformats[$formatname] = $formats[$formatname];
+        }
+        return $sortedformats;
+    }
+
+    public function get_settings_section_name() {
+        return 'formatsetting' . $this->name;
+    }
+
+    public function load_settings(part_of_admin_tree $adminroot, $parentnodename, $hassiteconfig) {
+        global $CFG, $USER, $DB, $OUTPUT, $PAGE; // in case settings.php wants to refer to them
+        $ADMIN = $adminroot; // also may be used in settings.php
+        $section = $this->get_settings_section_name();
+
+        $settings = null;
+        if ($hassiteconfig && file_exists($this->full_path('settings.php'))) {
+            $settings = new admin_settingpage($section, $this->displayname,
+                    'moodle/site:config', $this->is_enabled() === false);
+            include($this->full_path('settings.php')); // this may also set $settings to null
+        }
+        if ($settings) {
+            $ADMIN->add($parentnodename, $settings);
+        }
+    }
+
+    public function is_enabled() {
+        return !get_config($this->component, 'disabled');
+    }
+
+    public function get_uninstall_url() {
+        if ($this->name !== get_config('moodlecourse', 'format') && $this->name !== 'site') {
+            return new moodle_url('/admin/courseformats.php',
+                    array('sesskey' => sesskey(), 'action' => 'uninstall', 'format' => $this->name));
+        }
+        return parent::get_uninstall_url();
+    }
+}