admin/tool/mobile/classes/api.php

   1 <?php
   2 // This file is part of Moodle - http://moodle.org/
   3 //
   4 // Moodle is free software: you can redistribute it and/or modify
   5 // it under the terms of the GNU General Public License as published by
   6 // the Free Software Foundation, either version 3 of the License, or
   7 // (at your option) any later version.
   8 //
   9 // Moodle is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13 //
  14 // You should have received a copy of the GNU General Public License
  15 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
  16
  17 /**
  18  * Class for Moodle Mobile tools.
  19  *
  20  * @package    tool_mobile
  21  * @copyright  2016 Juan Leyva
  22  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  23  * @since      Moodle 3.1
  24  */
  25 namespace tool_mobile;
  26
  27 use core_component;
  28 use core_plugin_manager;
  29 use context_system;
  30 use moodle_url;
  31 use moodle_exception;
  32 use lang_string;
  33 use curl;
  34
  35 /**
  36  * API exposed by tool_mobile, to be used mostly by external functions and the plugin settings.
  37  *
  38  * @copyright  2016 Juan Leyva
  39  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  40  * @since      Moodle 3.1
  41  */
  42 class api {
  43
  44     /** @var int to identify the login via app. */
  45     const LOGIN_VIA_APP = 1;
  46     /** @var int to identify the login via browser. */
  47     const LOGIN_VIA_BROWSER = 2;
  48     /** @var int to identify the login via an embedded browser. */
  49     const LOGIN_VIA_EMBEDDED_BROWSER = 3;
  50     /** @var int seconds an auto-login key will expire. */
  51     const LOGIN_KEY_TTL = 60;
  52     /** @var string URL of the Moodle Apps Portal */
  53     const MOODLE_APPS_PORTAL_URL = 'https://apps.moodle.com';
  54
  55     /**
  56      * Returns a list of Moodle plugins supporting the mobile app.
  57      *
  58      * @return array an array of objects containing the plugin information
  59      */
  60     public static function get_plugins_supporting_mobile() {
  61         global $CFG;
  62         require_once($CFG->libdir . '/adminlib.php');
  63
  64         $cachekey = 'mobileplugins';
  65         if (!isloggedin()) {
  66             $cachekey = 'authmobileplugins';    // Use a different cache for not logged users.
  67         }
  68
  69         // Check if we can return this from cache.
  70         $cache = \cache::make('tool_mobile', 'plugininfo');
  71         $pluginsinfo = $cache->get($cachekey);
  72         if ($pluginsinfo !== false) {
  73             return (array)$pluginsinfo;
  74         }
  75
  76         $pluginsinfo = [];
  77         // For not logged users return only auth plugins.
  78         // This is to avoid anyone (not being a registered user) to obtain and download all the site remote add-ons.
  79         if (!isloggedin()) {
  80             $plugintypes = array('auth' => $CFG->dirroot.'/auth');
  81         } else {
  82             $plugintypes = core_component::get_plugin_types();
  83         }
  84
  85         foreach ($plugintypes as $plugintype => $unused) {
  86             // We need to include files here.
  87             $pluginswithfile = core_component::get_plugin_list_with_file($plugintype, 'db' . DIRECTORY_SEPARATOR . 'mobile.php');
  88             foreach ($pluginswithfile as $plugin => $notused) {
  89                 $path = core_component::get_plugin_directory($plugintype, $plugin);
  90                 $component = $plugintype . '_' . $plugin;
  91                 $version = get_component_version($component);
  92
  93                 require("$path/db/mobile.php");
  94                 foreach ($addons as $addonname => $addoninfo) {
  95
  96                     // Add handlers (for site add-ons).
  97                     $handlers = !empty($addoninfo['handlers']) ? $addoninfo['handlers'] : array();
  98                     $handlers = json_encode($handlers); // JSON formatted, since it is a complex structure that may vary over time.
  99
 100                     // Now language strings used by the app.
 101                     $lang = array();
 102                     if (!empty($addoninfo['lang'])) {
 103                         $stringmanager = get_string_manager();
 104                         $langs = $stringmanager->get_list_of_translations(true);
 105                         foreach ($langs as $langid => $langname) {
 106                             foreach ($addoninfo['lang'] as $stringinfo) {
 107                                 $lang[$langid][$stringinfo[0]] =
 108                                     $stringmanager->get_string($stringinfo[0], $stringinfo[1], null, $langid);
 109                             }
 110                         }
 111                     }
 112                     $lang = json_encode($lang);
 113
 114                     $plugininfo = array(
 115                         'component' => $component,
 116                         'version' => $version,
 117                         'addon' => $addonname,
 118                         'dependencies' => !empty($addoninfo['dependencies']) ? $addoninfo['dependencies'] : array(),
 119                         'fileurl' => '',
 120                         'filehash' => '',
 121                         'filesize' => 0,
 122                         'handlers' => $handlers,
 123                         'lang' => $lang,
 124                     );
 125
 126                     // All the mobile packages must be under the plugin mobile directory.
 127                     $package = $path . '/mobile/' . $addonname . '.zip';
 128                     if (file_exists($package)) {
 129                         $plugininfo['fileurl'] = $CFG->wwwroot . '' . str_replace($CFG->dirroot, '', $package);
 130                         $plugininfo['filehash'] = sha1_file($package);
 131                         $plugininfo['filesize'] = filesize($package);
 132                     }
 133                     $pluginsinfo[] = $plugininfo;
 134                 }
 135             }
 136         }
 137
 138         $cache->set($cachekey, $pluginsinfo);
 139
 140         return $pluginsinfo;
 141     }
 142
 143     /**
 144      * Returns a list of the site public settings, those not requiring authentication.
 145      *
 146      * @return array with the settings and warnings
 147      */
 148     public static function get_public_config() {
 149         global $CFG, $SITE, $PAGE, $OUTPUT;
 150         require_once($CFG->libdir . '/authlib.php');
 151
 152         $context = context_system::instance();
 153         // We need this to make work the format text functions.
 154         $PAGE->set_context($context);
 155
 156         list($authinstructions, $notusedformat) = external_format_text($CFG->auth_instructions, FORMAT_MOODLE, $context->id);
 157         list($maintenancemessage, $notusedformat) = external_format_text($CFG->maintenance_message, FORMAT_MOODLE, $context->id);
 158         $settings = array(
 159             'wwwroot' => $CFG->wwwroot,
 160             'httpswwwroot' => $CFG->wwwroot,
 161             'sitename' => external_format_string($SITE->fullname, $context->id, true),
 162             'guestlogin' => $CFG->guestloginbutton,
 163             'rememberusername' => $CFG->rememberusername,
 164             'authloginviaemail' => $CFG->authloginviaemail,
 165             'registerauth' => $CFG->registerauth,
 166             'forgottenpasswordurl' => clean_param($CFG->forgottenpasswordurl, PARAM_URL), // We may expect a mailto: here.
 167             'authinstructions' => $authinstructions,
 168             'authnoneenabled' => (int) is_enabled_auth('none'),
 169             'enablewebservices' => $CFG->enablewebservices,
 170             'enablemobilewebservice' => $CFG->enablemobilewebservice,
 171             'maintenanceenabled' => $CFG->maintenance_enabled,
 172             'maintenancemessage' => $maintenancemessage,
 173             'mobilecssurl' => !empty($CFG->mobilecssurl) ? $CFG->mobilecssurl : '',
 174             'tool_mobile_disabledfeatures' => get_config('tool_mobile', 'disabledfeatures'),
 175             'country' => clean_param($CFG->country, PARAM_NOTAGS),
 176             'agedigitalconsentverification' => \core_auth\digital_consent::is_age_digital_consent_verification_enabled(),
 177             'autolang' => $CFG->autolang,
 178             'lang' => clean_param($CFG->lang, PARAM_LANG),  // Avoid breaking WS because of incorrect package langs.
 179             'langmenu' => $CFG->langmenu,
 180             'langlist' => $CFG->langlist,
 181             'locale' => $CFG->locale,
 182             'tool_mobile_minimumversion' => get_config('tool_mobile', 'minimumversion'),
 183             'tool_mobile_iosappid' => get_config('tool_mobile', 'iosappid'),
 184             'tool_mobile_androidappid' => get_config('tool_mobile', 'androidappid'),
 185             'tool_mobile_setuplink' => clean_param(get_config('tool_mobile', 'setuplink'), PARAM_URL),
 186         );
 187
 188         $typeoflogin = get_config('tool_mobile', 'typeoflogin');
 189         // Not found, edge case.
 190         if ($typeoflogin === false) {
 191             $typeoflogin = self::LOGIN_VIA_APP; // Defaults to via app.
 192         }
 193         $settings['typeoflogin'] = $typeoflogin;
 194
 195         // Check if the user can sign-up to return the launch URL in that case.
 196         $cansignup = signup_is_enabled();
 197
 198         $url = new moodle_url("/$CFG->admin/tool/mobile/launch.php");
 199         $settings['launchurl'] = $url->out(false);
 200
 201         // Check that we are receiving a moodle_url object, themes can override get_logo_url and may return incorrect values.
 202         if (($logourl = $OUTPUT->get_logo_url()) && $logourl instanceof moodle_url) {
 203             $settings['logourl'] = clean_param($logourl->out(false), PARAM_URL);
 204         }
 205         if (($compactlogourl = $OUTPUT->get_compact_logo_url()) && $compactlogourl instanceof moodle_url) {
 206             $settings['compactlogourl'] = clean_param($compactlogourl->out(false), PARAM_URL);
 207         }
 208
 209         // Identity providers.
 210         $authsequence = get_enabled_auth_plugins(true);
 211         $identityproviders = \auth_plugin_base::get_identity_providers($authsequence);
 212         $identityprovidersdata = \auth_plugin_base::prepare_identity_providers_for_output($identityproviders, $OUTPUT);
 213         if (!empty($identityprovidersdata)) {
 214             $settings['identityproviders'] = $identityprovidersdata;
 215             // Clean URLs to avoid breaking Web Services.
 216             // We can't do it in prepare_identity_providers_for_output() because it may break the web output.
 217             foreach ($settings['identityproviders'] as &$ip) {
 218                 $ip['url'] = (!empty($ip['url'])) ? clean_param($ip['url'], PARAM_URL) : '';
 219                 $ip['iconurl'] = (!empty($ip['iconurl'])) ? clean_param($ip['iconurl'], PARAM_URL) : '';
 220             }
 221         }
 222
 223         // If age is verified, return also the admin contact details.
 224         if ($settings['agedigitalconsentverification']) {
 225             $settings['supportname'] = clean_param($CFG->supportname, PARAM_NOTAGS);
 226             $settings['supportemail'] = clean_param($CFG->supportemail, PARAM_EMAIL);
 227         }
 228
 229         return $settings;
 230     }
 231
 232     /**
 233      * Returns a list of site configurations, filtering by section.
 234      *
 235      * @param  string $section section name
 236      * @return stdClass object containing the settings
 237      */
 238     public static function get_config($section) {
 239         global $CFG, $SITE;
 240
 241         $settings = new \stdClass;
 242         $context = context_system::instance();
 243         $isadmin = has_capability('moodle/site:config', $context);
 244
 245         if (empty($section) or $section == 'frontpagesettings') {
 246             require_once($CFG->dirroot . '/course/format/lib.php');
 247             // First settings that anyone can deduce.
 248             $settings->fullname = external_format_string($SITE->fullname, $context->id);
 249             $settings->shortname = external_format_string($SITE->shortname, $context->id);
 250
 251             // Return to a var instead of directly to $settings object because of differences between
 252             // list() in php5 and php7. {@link http://php.net/manual/en/function.list.php}
 253             $formattedsummary = external_format_text($SITE->summary, $SITE->summaryformat,
 254                                                                                         $context->id);
 255             $settings->summary = $formattedsummary[0];
 256             $settings->summaryformat = $formattedsummary[1];
 257             $settings->frontpage = $CFG->frontpage;
 258             $settings->frontpageloggedin = $CFG->frontpageloggedin;
 259             $settings->maxcategorydepth = $CFG->maxcategorydepth;
 260             $settings->frontpagecourselimit = $CFG->frontpagecourselimit;
 261             $settings->numsections = course_get_format($SITE)->get_last_section_number();
 262             $settings->newsitems = $SITE->newsitems;
 263             $settings->commentsperpage = $CFG->commentsperpage;
 264
 265             // Now, admin settings.
 266             if ($isadmin) {
 267                 $settings->defaultfrontpageroleid = $CFG->defaultfrontpageroleid;
 268             }
 269         }
 270
 271         if (empty($section) or $section == 'sitepolicies') {
 272             $manager = new \core_privacy\local\sitepolicy\manager();
 273             $settings->sitepolicy = ($sitepolicy = $manager->get_embed_url()) ? $sitepolicy->out(false) : '';
 274             $settings->sitepolicyhandler = $CFG->sitepolicyhandler;
 275             $settings->disableuserimages = $CFG->disableuserimages;
 276         }
 277
 278         if (empty($section) or $section == 'gradessettings') {
 279             require_once($CFG->dirroot . '/user/lib.php');
 280             $settings->mygradesurl = user_mygrades_url();
 281             // The previous function may return moodle_url instances or plain string URLs.
 282             if ($settings->mygradesurl instanceof moodle_url) {
 283                 $settings->mygradesurl = $settings->mygradesurl->out(false);
 284             }
 285         }
 286
 287         if (empty($section) or $section == 'mobileapp') {
 288             $settings->tool_mobile_forcelogout = get_config('tool_mobile', 'forcelogout');
 289             $settings->tool_mobile_customlangstrings = get_config('tool_mobile', 'customlangstrings');
 290             $settings->tool_mobile_disabledfeatures = get_config('tool_mobile', 'disabledfeatures');
 291             $settings->tool_mobile_custommenuitems = get_config('tool_mobile', 'custommenuitems');
 292             $settings->tool_mobile_apppolicy = get_config('tool_mobile', 'apppolicy');
 293         }
 294
 295         if (empty($section) or $section == 'calendar') {
 296             $settings->calendartype = $CFG->calendartype;
 297             $settings->calendar_site_timeformat = $CFG->calendar_site_timeformat;
 298             $settings->calendar_startwday = $CFG->calendar_startwday;
 299             $settings->calendar_adminseesall = $CFG->calendar_adminseesall;
 300             $settings->calendar_lookahead = $CFG->calendar_lookahead;
 301             $settings->calendar_maxevents = $CFG->calendar_maxevents;
 302         }
 303
 304         if (empty($section) or $section == 'coursecolors') {
 305             $colornumbers = range(1, 10);
 306             foreach ($colornumbers as $number) {
 307                 $settings->{'core_admin_coursecolor' . $number} = get_config('core_admin', 'coursecolor' . $number);
 308             }
 309         }
 310
 311         return $settings;
 312     }
 313
 314     /*
 315      * Check if all the required conditions are met to allow the auto-login process continue.
 316      *
 317      * @param  int $userid  current user id
 318      * @since Moodle 3.2
 319      * @throws moodle_exception
 320      */
 321     public static function check_autologin_prerequisites($userid) {
 322         global $CFG;
 323
 324         if (!$CFG->enablewebservices or !$CFG->enablemobilewebservice) {
 325             throw new moodle_exception('enablewsdescription', 'webservice');
 326         }
 327
 328         if (!is_https()) {
 329             throw new moodle_exception('httpsrequired', 'tool_mobile');
 330         }
 331
 332         if (has_capability('moodle/site:config', context_system::instance(), $userid) or is_siteadmin($userid)) {
 333             throw new moodle_exception('autologinnotallowedtoadmins', 'tool_mobile');
 334         }
 335     }
 336
 337     /**
 338      * Creates an auto-login key for the current user, this key is restricted by time and ip address.
 339      *
 340      * @return string the key
 341      * @since Moodle 3.2
 342      */
 343     public static function get_autologin_key() {
 344         global $USER;
 345         // Delete previous keys.
 346         delete_user_key('tool_mobile', $USER->id);
 347
 348         // Create a new key.
 349         $iprestriction = getremoteaddr();
 350         $validuntil = time() + self::LOGIN_KEY_TTL;
 351         return create_user_key('tool_mobile', $USER->id, null, $iprestriction, $validuntil);
 352     }
 353
 354     /**
 355      * Get a list of the Mobile app features.
 356      *
 357      * @return array array with the features grouped by theirs ubication in the app.
 358      * @since Moodle 3.3
 359      */
 360     public static function get_features_list() {
 361         global $CFG;
 362         require_once($CFG->libdir . '/authlib.php');
 363
 364         $general = new lang_string('general');
 365         $mainmenu = new lang_string('mainmenu', 'tool_mobile');
 366         $course = new lang_string('course');
 367         $modules = new lang_string('managemodules');
 368         $blocks = new lang_string('blocks');
 369         $user = new lang_string('user');
 370         $files = new lang_string('files');
 371         $remoteaddons = new lang_string('remoteaddons', 'tool_mobile');
 372         $identityproviders = new lang_string('oauth2identityproviders', 'tool_mobile');
 373
 374         $availablemods = core_plugin_manager::instance()->get_plugins_of_type('mod');
 375         $coursemodules = array();
 376         $appsupportedmodules = array('assign', 'book', 'chat', 'choice', 'data', 'feedback', 'folder', 'forum', 'glossary', 'imscp',
 377             'label', 'lesson', 'lti', 'page', 'quiz', 'resource', 'scorm', 'survey', 'url', 'wiki', 'workshop');
 378
 379         foreach ($availablemods as $mod) {
 380             if (in_array($mod->name, $appsupportedmodules)) {
 381                 $coursemodules['$mmCourseDelegate_mmaMod' . ucfirst($mod->name)] = $mod->displayname;
 382             }
 383         }
 384         asort($coursemodules);
 385
 386         $remoteaddonslist = array();
 387         $mobileplugins = self::get_plugins_supporting_mobile();
 388         foreach ($mobileplugins as $plugin) {
 389             $displayname = core_plugin_manager::instance()->plugin_name($plugin['component']) . " - " . $plugin['addon'];
 390             $remoteaddonslist['sitePlugin_' . $plugin['component'] . '_' . $plugin['addon']] = $displayname;
 391
 392         }
 393
 394         // Display blocks.
 395         $availableblocks = core_plugin_manager::instance()->get_plugins_of_type('block');
 396         $courseblocks = array();
 397         $appsupportedblocks = array(
 398             'activity_modules' => 'CoreBlockDelegate_AddonBlockActivityModules',
 399             'site_main_menu' => 'CoreBlockDelegate_AddonBlockSiteMainMenu',
 400             'myoverview' => 'CoreBlockDelegate_AddonBlockMyOverview',
 401             'timeline' => 'CoreBlockDelegate_AddonBlockTimeline',
 402             'recentlyaccessedcourses' => 'CoreBlockDelegate_AddonBlockRecentlyAccessedCourses',
 403             'starredcourses' => 'CoreBlockDelegate_AddonBlockStarredCourses',
 404             'recentlyaccesseditems' => 'CoreBlockDelegate_AddonBlockRecentlyAccessedItems',
 405             'badges' => 'CoreBlockDelegate_AddonBlockBadges',
 406             'blog_menu' => 'CoreBlockDelegate_AddonBlockBlogMenu',
 407             'blog_recent' => 'CoreBlockDelegate_AddonBlockBlogRecent',
 408             'blog_tags' => 'CoreBlockDelegate_AddonBlockBlogTags',
 409             'calendar_month' => 'CoreBlockDelegate_AddonBlockCalendarMonth',
 410             'calendar_upcoming' => 'CoreBlockDelegate_AddonBlockCalendarUpcoming',
 411             'comments' => 'CoreBlockDelegate_AddonBlockComments',
 412             'completionstatus' => 'CoreBlockDelegate_AddonBlockCompletionStatus',
 413             'feedback' => 'CoreBlockDelegate_AddonBlockFeedback',
 414             'glossary_random' => 'CoreBlockDelegate_AddonBlockGlossaryRandom',
 415             'html' => 'CoreBlockDelegate_AddonBlockHtml',
 416             'lp' => 'CoreBlockDelegate_AddonBlockLp',
 417             'news_items' => 'CoreBlockDelegate_AddonBlockNewsItems',
 418             'online_users' => 'CoreBlockDelegate_AddonBlockOnlineUsers',
 419             'selfcompletion' => 'CoreBlockDelegate_AddonBlockSelfCompletion',
 420             'tags' => 'CoreBlockDelegate_AddonBlockTags',
 421         );
 422
 423         foreach ($availableblocks as $block) {
 424             if (isset($appsupportedblocks[$block->name])) {
 425                 $courseblocks[$appsupportedblocks[$block->name]] = $block->displayname;
 426             }
 427         }
 428         asort($courseblocks);
 429
 430         $features = array(
 431             "$general" => array(
 432                 'NoDelegate_CoreOffline' => new lang_string('offlineuse', 'tool_mobile'),
 433                 'NoDelegate_SiteBlocks' => new lang_string('blocks'),
 434                 'NoDelegate_CoreComments' => new lang_string('comments'),
 435                 'NoDelegate_CoreRating' => new lang_string('ratings', 'rating'),
 436                 'NoDelegate_CoreTag' => new lang_string('tags'),
 437                 '$mmLoginEmailSignup' => new lang_string('startsignup'),
 438                 'NoDelegate_ForgottenPassword' => new lang_string('forgotten'),
 439                 'NoDelegate_ResponsiveMainMenuItems' => new lang_string('responsivemainmenuitems', 'tool_mobile'),
 440                 'NoDelegate_H5POffline' => new lang_string('h5poffline', 'tool_mobile'),
 441                 'NoDelegate_DarkMode' => new lang_string('darkmode', 'tool_mobile'),
 442             ),
 443             "$mainmenu" => array(
 444                 '$mmSideMenuDelegate_mmaFrontpage' => new lang_string('sitehome'),
 445                 '$mmSideMenuDelegate_mmCourses' => new lang_string('mycourses'),
 446                 'CoreMainMenuDelegate_CoreCoursesDashboard' => new lang_string('myhome'),
 447                 '$mmSideMenuDelegate_mmaCalendar' => new lang_string('calendar', 'calendar'),
 448                 '$mmSideMenuDelegate_mmaNotifications' => new lang_string('notifications', 'message'),
 449                 '$mmSideMenuDelegate_mmaMessages' => new lang_string('messages', 'message'),
 450                 '$mmSideMenuDelegate_mmaGrades' => new lang_string('grades', 'grades'),
 451                 '$mmSideMenuDelegate_mmaCompetency' => new lang_string('myplans', 'tool_lp'),
 452                 'CoreMainMenuDelegate_AddonBlog' => new lang_string('blog', 'blog'),
 453                 '$mmSideMenuDelegate_mmaFiles' => new lang_string('files'),
 454                 '$mmSideMenuDelegate_website' => new lang_string('webpage'),
 455                 '$mmSideMenuDelegate_help' => new lang_string('help'),
 456             ),
 457             "$course" => array(
 458                 'NoDelegate_CourseBlocks' => new lang_string('blocks'),
 459                 'CoreCourseOptionsDelegate_AddonBlog' => new lang_string('blog', 'blog'),
 460                 '$mmCoursesDelegate_search' => new lang_string('search'),
 461                 '$mmCoursesDelegate_mmaCompetency' => new lang_string('competencies', 'competency'),
 462                 '$mmCoursesDelegate_mmaParticipants' => new lang_string('participants'),
 463                 '$mmCoursesDelegate_mmaGrades' => new lang_string('grades', 'grades'),
 464                 '$mmCoursesDelegate_mmaCourseCompletion' => new lang_string('coursecompletion', 'completion'),
 465                 '$mmCoursesDelegate_mmaNotes' => new lang_string('notes', 'notes'),
 466                 'NoDelegate_CoreCourseDownload' => new lang_string('downloadcourse', 'tool_mobile'),
 467                 'NoDelegate_CoreCoursesDownload' => new lang_string('downloadcourses', 'tool_mobile'),
 468             ),
 469             "$user" => array(
 470                 'CoreUserDelegate_AddonBlog:blogs' => new lang_string('blog', 'blog'),
 471                 '$mmUserDelegate_mmaBadges' => new lang_string('badges', 'badges'),
 472                 '$mmUserDelegate_mmaCompetency:learningPlan' => new lang_string('competencies', 'competency'),
 473                 '$mmUserDelegate_mmaCourseCompletion:viewCompletion' => new lang_string('coursecompletion', 'completion'),
 474                 '$mmUserDelegate_mmaGrades:viewGrades' => new lang_string('grades', 'grades'),
 475                 '$mmUserDelegate_mmaMessages:sendMessage' => new lang_string('sendmessage', 'message'),
 476                 '$mmUserDelegate_mmaMessages:addContact' => new lang_string('addcontact', 'message'),
 477                 '$mmUserDelegate_mmaMessages:blockContact' => new lang_string('blockcontact', 'message'),
 478                 '$mmUserDelegate_mmaNotes:addNote' => new lang_string('addnewnote', 'notes'),
 479                 '$mmUserDelegate_picture' => new lang_string('userpic'),
 480             ),
 481             "$files" => array(
 482                 'files_privatefiles' => new lang_string('privatefiles'),
 483                 'files_sitefiles' => new lang_string('sitefiles'),
 484                 'files_upload' => new lang_string('upload'),
 485             ),
 486             "$modules" => $coursemodules,
 487             "$blocks" => $courseblocks,
 488         );
 489
 490         if (!empty($remoteaddonslist)) {
 491             $features["$remoteaddons"] = $remoteaddonslist;
 492         }
 493
 494         // Display OAuth 2 identity providers.
 495         if (is_enabled_auth('oauth2')) {
 496             $identityproviderslist = array();
 497             $idps = \auth_plugin_base::get_identity_providers(['oauth2']);
 498
 499             foreach ($idps as $idp) {
 500                 // Only add identity providers that have an ID.
 501                 $id = isset($idp['url']) ? $idp['url']->get_param('id') : null;
 502                 if ($id != null) {
 503                     $identityproviderslist['NoDelegate_IdentityProvider_' . $id] = $idp['name'];
 504                 }
 505             }
 506
 507             if (!empty($identityproviderslist)) {
 508                 $features["$identityproviders"] = array();
 509
 510                 if (count($identityproviderslist) > 1) {
 511                     // Include an option to disable them all.
 512                     $features["$identityproviders"]['NoDelegate_IdentityProviders'] = new lang_string('all');
 513                 }
 514
 515                 $features["$identityproviders"] = array_merge($features["$identityproviders"], $identityproviderslist);
 516             }
 517         }
 518
 519         return $features;
 520     }
 521
 522     /**
 523      * This function check the current site for potential configuration issues that may prevent the mobile app to work.
 524      *
 525      * @return array list of potential issues
 526      * @since  Moodle 3.4
 527      */
 528     public static function get_potential_config_issues() {
 529         global $CFG;
 530         require_once($CFG->dirroot . "/lib/filelib.php");
 531         require_once($CFG->dirroot . '/message/lib.php');
 532
 533         $warnings = array();
 534
 535         $curl = new curl();
 536         // Return certificate information and verify the certificate.
 537         $curl->setopt(array('CURLOPT_CERTINFO' => 1, 'CURLOPT_SSL_VERIFYPEER' => true));
 538         $httpswwwroot = str_replace('http:', 'https:', $CFG->wwwroot); // Force https url.
 539         // Check https using a page not redirecting or returning exceptions.
 540         $curl->head($httpswwwroot . "/$CFG->admin/tool/mobile/mobile.webmanifest.php");
 541         $info = $curl->get_info();
 542
 543         // First of all, check the server certificate (if any).
 544         if (empty($info['http_code']) or ($info['http_code'] >= 400)) {
 545             $warnings[] = ['nohttpsformobilewarning', 'admin'];
 546         } else {
 547             // Check the certificate is not self-signed or has an untrusted-root.
 548             // This may be weak in some scenarios (when the curl SSL verifier is outdated).
 549             if (empty($info['certinfo'])) {
 550                 $warnings[] = ['selfsignedoruntrustedcertificatewarning', 'tool_mobile'];
 551             } else {
 552                 $timenow = time();
 553                 $expectedissuer = null;
 554                 foreach ($info['certinfo'] as $cert) {
 555                     // Check if the signature algorithm is weak (Android won't work with SHA-1).
 556                     if ($cert['Signature Algorithm'] == 'sha1WithRSAEncryption' || $cert['Signature Algorithm'] == 'sha1WithRSA') {
 557                         $warnings[] = ['insecurealgorithmwarning', 'tool_mobile'];
 558                     }
 559                     // Check certificate start date.
 560                     if (strtotime($cert['Start date']) > $timenow) {
 561                         $warnings[] = ['invalidcertificatestartdatewarning', 'tool_mobile'];
 562                     }
 563                     // Check certificate end date.
 564                     if (strtotime($cert['Expire date']) < $timenow) {
 565                         $warnings[] = ['invalidcertificateexpiredatewarning', 'tool_mobile'];
 566                     }
 567                     // Check the chain.
 568                     if ($expectedissuer !== null) {
 569                         if ($expectedissuer !== $cert['Subject'] || $cert['Subject'] === $cert['Issuer']) {
 570                             $warnings[] = ['invalidcertificatechainwarning', 'tool_mobile'];
 571                         }
 572                     }
 573                     $expectedissuer = $cert['Issuer'];
 574                 }
 575             }
 576         }
 577         // Now check typical configuration problems.
 578         if ((int) $CFG->userquota === PHP_INT_MAX) {
 579             // In old Moodle version was a text so was possible to have numeric values > PHP_INT_MAX.
 580             $warnings[] = ['invaliduserquotawarning', 'tool_mobile'];
 581         }
 582         // Check ADOdb debug enabled.
 583         if (get_config('auth_db', 'debugauthdb') || get_config('enrol_database', 'debugdb')) {
 584             $warnings[] = ['adodbdebugwarning', 'tool_mobile'];
 585         }
 586         // Check display errors on.
 587         if (!empty($CFG->debugdisplay)) {
 588             $warnings[] = ['displayerrorswarning', 'tool_mobile'];
 589         }
 590         // Check mobile notifications.
 591         $processors = get_message_processors();
 592         $enabled = false;
 593         foreach ($processors as $processor => $status) {
 594             if ($processor == 'airnotifier' && $status->enabled) {
 595                 $enabled = true;
 596             }
 597         }
 598         if (!$enabled) {
 599             $warnings[] = ['mobilenotificationsdisabledwarning', 'tool_mobile'];
 600         }
 601
 602         return $warnings;
 603     }
 604 }