webservice/externallib.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 /**
  19  * external API for mobile web services
  20  *
  21  * @package    core_webservice
  22  * @category   external
  23  * @copyright  2011 Jerome Mouneyrac <jerome@moodle.com>
  24  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  25  */
  26
  27 defined('MOODLE_INTERNAL') || die;
  28
  29 require_once("$CFG->libdir/externallib.php");
  30
  31 /**
  32  * Web service related functions
  33  *
  34  * @package    core_webservice
  35  * @category   external
  36  * @copyright  2011 Jerome Mouneyrac <jerome@moodle.com>
  37  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  38  * @since Moodle 2.2
  39  */
  40 class core_webservice_external extends external_api {
  41
  42     /**
  43      * Returns description of method parameters
  44      *
  45      * @return external_function_parameters
  46      * @since Moodle 2.2
  47      */
  48     public static function get_site_info_parameters() {
  49         return new external_function_parameters(
  50             array('serviceshortnames' => new external_multiple_structure (
  51                 new external_value(
  52                     PARAM_ALPHANUMEXT,
  53                     'service shortname'),
  54                     'DEPRECATED PARAMETER - it was a design error in the original implementation. \
  55                     It is ignored now. (parameter kept for backward compatibility)',
  56                     VALUE_DEFAULT,
  57                     array()
  58                 ),
  59             )
  60         );
  61     }
  62
  63     /**
  64      * Return user information including profile picture + basic site information
  65      * Note:
  66      * - no capability checking because we return only known information about logged user
  67      *
  68      * @param array $serviceshortnames - DEPRECATED PARAMETER - values will be ignored -
  69      * it was an original design error, we keep for backward compatibility.
  70      * @return array site info
  71      * @since Moodle 2.2
  72      */
  73     public static function get_site_info($serviceshortnames = array()) {
  74         global $USER, $SITE, $CFG, $DB, $PAGE;
  75
  76         $params = self::validate_parameters(self::get_site_info_parameters(),
  77                       array('serviceshortnames'=>$serviceshortnames));
  78
  79         $context = context_user::instance($USER->id);
  80         $systemcontext = context_system::instance();
  81
  82         $userpicture = new user_picture($USER);
  83         $userpicture->size = 1; // Size f1.
  84         $profileimageurl = $userpicture->get_url($PAGE);
  85
  86         // Site information.
  87         $siteinfo =  array(
  88             'sitename' => external_format_string($SITE->fullname, $systemcontext),
  89             'siteurl' => $CFG->wwwroot,
  90             'username' => $USER->username,
  91             'firstname' => $USER->firstname,
  92             'lastname' => $USER->lastname,
  93             'fullname' => fullname($USER),
  94             'lang' => clean_param(current_language(), PARAM_LANG),
  95             'userid' => $USER->id,
  96             'userpictureurl' => $profileimageurl->out(false),
  97             'siteid' => SITEID
  98         );
  99
 100         // Retrieve the service and functions from the web service linked to the token
 101         // If you call this function directly from external (not a web service call),
 102         // then it will still return site info without information about a service
 103         // Note: wsusername/wspassword ws authentication is not supported.
 104         $functions = array();
 105         if ($CFG->enablewebservices) { // No need to check token if web service are disabled and not a ws call.
 106             $token = optional_param('wstoken', '', PARAM_ALPHANUM);
 107
 108             if (!empty($token)) { // No need to run if not a ws call.
 109                 // Retrieve service shortname.
 110                 $servicesql = 'SELECT s.*
 111                                FROM {external_services} s, {external_tokens} t
 112                                WHERE t.externalserviceid = s.id AND token = ? AND t.userid = ? AND s.enabled = 1';
 113                 $service = $DB->get_record_sql($servicesql, array($token, $USER->id));
 114
 115                 $siteinfo['downloadfiles'] = $service->downloadfiles;
 116                 $siteinfo['uploadfiles'] = $service->uploadfiles;
 117
 118                 if (!empty($service)) {
 119                     // Return the release and version number for web service users only.
 120                     $siteinfo['release'] = $CFG->release;
 121                     $siteinfo['version'] = $CFG->version;
 122                     // Retrieve the functions.
 123                     $functionssql = "SELECT f.*
 124                             FROM {external_functions} f, {external_services_functions} sf
 125                             WHERE f.name = sf.functionname AND sf.externalserviceid = ?";
 126                     $functions = $DB->get_records_sql($functionssql, array($service->id));
 127                 } else {
 128                     throw new coding_exception('No service found in get_site_info: something is buggy, \
 129                                                 it should have fail at the ws server authentication layer.');
 130                 }
 131             }
 132         }
 133
 134         // Build up the returned values of the list of functions.
 135         $componentversions = array();
 136         $availablefunctions = array();
 137         foreach ($functions as $function) {
 138             $functioninfo = array();
 139             $functioninfo['name'] = $function->name;
 140             if ($function->component == 'moodle' || $function->component == 'core') {
 141                 $version = $CFG->version; // Moodle version.
 142             } else {
 143                 $versionpath = core_component::get_component_directory($function->component).'/version.php';
 144                 if (is_readable($versionpath)) {
 145                     // We store the component version once retrieved (so we don't load twice the version.php).
 146                     if (!isset($componentversions[$function->component])) {
 147                         $plugin = new stdClass();
 148                         include($versionpath);
 149                         $componentversions[$function->component] = $plugin->version;
 150                         $version = $plugin->version;
 151                     } else {
 152                         $version = $componentversions[$function->component];
 153                     }
 154                 } else {
 155                     // Function component should always have a version.php,
 156                     // otherwise the function should have been described with component => 'moodle'.
 157                     throw new moodle_exception('missingversionfile', 'webservice', '', $function->component);
 158                 }
 159             }
 160             $functioninfo['version'] = $version;
 161             $availablefunctions[] = $functioninfo;
 162         }
 163
 164         $siteinfo['functions'] = $availablefunctions;
 165
 166         // Mobile CSS theme and alternative login url.
 167         $siteinfo['mobilecssurl'] = !empty($CFG->mobilecssurl) ? $CFG->mobilecssurl : '';
 168
 169         // Retrieve some advanced features. Only enable/disable ones (bool).
 170         $advancedfeatures = array("usecomments", "usetags", "enablenotes", "messaging", "enableblogs",
 171                                     "enablecompletion", "enablebadges", "messagingallusers");
 172         foreach ($advancedfeatures as $feature) {
 173             if (isset($CFG->{$feature})) {
 174                 $siteinfo['advancedfeatures'][] = array(
 175                     'name' => $feature,
 176                     'value' => (int) $CFG->{$feature}
 177                 );
 178             }
 179         }
 180         // Special case mnet_dispatcher_mode.
 181         $siteinfo['advancedfeatures'][] = array(
 182             'name' => 'mnet_dispatcher_mode',
 183             'value' => ($CFG->mnet_dispatcher_mode == 'strict') ? 1 : 0
 184         );
 185
 186         // User can manage own files.
 187         $siteinfo['usercanmanageownfiles'] = has_capability('moodle/user:manageownfiles', $context);
 188
 189         // User quota. 0 means user can ignore the quota.
 190         $siteinfo['userquota'] = 0;
 191         if (!has_capability('moodle/user:ignoreuserquota', $context)) {
 192             $siteinfo['userquota'] = (int) $CFG->userquota; // Cast to int to ensure value is not higher than PHP_INT_MAX.
 193         }
 194
 195         // User max upload file size. -1 means the user can ignore the upload file size.
 196         // Cast to int to ensure value is not higher than PHP_INT_MAX.
 197         $siteinfo['usermaxuploadfilesize'] = (int) get_user_max_upload_file_size($context, $CFG->maxbytes);
 198
 199         // User home page.
 200         $siteinfo['userhomepage'] = get_home_page();
 201
 202         // Calendar.
 203         $siteinfo['sitecalendartype'] = $CFG->calendartype;
 204         if (empty($USER->calendartype)) {
 205             $siteinfo['usercalendartype'] = $CFG->calendartype;
 206         } else {
 207             $siteinfo['usercalendartype'] = $USER->calendartype;
 208         }
 209         $siteinfo['userissiteadmin'] = is_siteadmin();
 210
 211         // User key, to avoid using the WS token for fetching assets.
 212         $siteinfo['userprivateaccesskey'] = get_user_key('core_files', $USER->id);
 213
 214         // Current theme.
 215         $siteinfo['theme'] = clean_param($PAGE->theme->name, PARAM_THEME);  // We always clean to avoid problem with old sites.
 216
 217         $siteinfo['limitconcurrentlogins'] = (int) $CFG->limitconcurrentlogins;
 218         if (!empty($CFG->limitconcurrentlogins)) {
 219             // For performance, only when enabled.
 220             $siteinfo['usersessionscount'] = $DB->count_records('sessions', ['userid' => $USER->id]);
 221         }
 222
 223         return $siteinfo;
 224     }
 225
 226     /**
 227      * Returns description of method result value
 228      *
 229      * @return external_single_structure
 230      * @since Moodle 2.2
 231      */
 232     public static function get_site_info_returns() {
 233         return new external_single_structure(
 234             array(
 235                 'sitename'       => new external_value(PARAM_RAW, 'site name'),
 236                 'username'       => new external_value(PARAM_RAW, 'username'),
 237                 'firstname'      => new external_value(PARAM_TEXT, 'first name'),
 238                 'lastname'       => new external_value(PARAM_TEXT, 'last name'),
 239                 'fullname'       => new external_value(PARAM_TEXT, 'user full name'),
 240                 'lang'           => new external_value(PARAM_LANG, 'Current language.'),
 241                 'userid'         => new external_value(PARAM_INT, 'user id'),
 242                 'siteurl'        => new external_value(PARAM_RAW, 'site url'),
 243                 'userpictureurl' => new external_value(PARAM_URL, 'the user profile picture.
 244                     Warning: this url is the public URL that only works when forcelogin is set to NO and guestaccess is set to YES.
 245                     In order to retrieve user profile pictures independently of the Moodle config, replace "pluginfile.php" by
 246                     "webservice/pluginfile.php?token=WSTOKEN&file="
 247                     Of course the user can only see profile picture depending
 248                     on his/her permissions. Moreover it is recommended to use HTTPS too.'),
 249                 'functions'      => new external_multiple_structure(
 250                     new external_single_structure(
 251                         array(
 252                             'name' => new external_value(PARAM_RAW, 'function name'),
 253                             'version' => new external_value(PARAM_TEXT,
 254                                         'The version number of the component to which the function belongs')
 255                         ), 'functions that are available')
 256                     ),
 257                 'downloadfiles'  => new external_value(PARAM_INT, '1 if users are allowed to download files, 0 if not',
 258                                                        VALUE_OPTIONAL),
 259                 'uploadfiles'  => new external_value(PARAM_INT, '1 if users are allowed to upload files, 0 if not',
 260                                                        VALUE_OPTIONAL),
 261                 'release'  => new external_value(PARAM_TEXT, 'Moodle release number', VALUE_OPTIONAL),
 262                 'version'  => new external_value(PARAM_TEXT, 'Moodle version number', VALUE_OPTIONAL),
 263                 'mobilecssurl'  => new external_value(PARAM_URL, 'Mobile custom CSS theme', VALUE_OPTIONAL),
 264                 'advancedfeatures' => new external_multiple_structure(
 265                     new external_single_structure(
 266                         array(
 267                             'name'  => new external_value(PARAM_ALPHANUMEXT, 'feature name'),
 268                             'value' => new external_value(PARAM_INT, 'feature value. Usually 1 means enabled.')
 269                         ),
 270                         'Advanced features availability'
 271                     ),
 272                     'Advanced features availability',
 273                     VALUE_OPTIONAL
 274                 ),
 275                 'usercanmanageownfiles' => new external_value(PARAM_BOOL,
 276                                             'true if the user can manage his own files', VALUE_OPTIONAL),
 277                 'userquota' => new external_value(PARAM_INT,
 278                                     'user quota (bytes). 0 means user can ignore the quota', VALUE_OPTIONAL),
 279                 'usermaxuploadfilesize' => new external_value(PARAM_INT,
 280                                             'user max upload file size (bytes). -1 means the user can ignore the upload file size',
 281                                             VALUE_OPTIONAL),
 282                 'userhomepage' => new external_value(PARAM_INT,
 283                                                         'the default home page for the user: 0 for the site home, 1 for dashboard',
 284                                                         VALUE_OPTIONAL),
 285                 'userprivateaccesskey'  => new external_value(PARAM_ALPHANUM, 'Private user access key for fetching files.',
 286                     VALUE_OPTIONAL),
 287                 'siteid'  => new external_value(PARAM_INT, 'Site course ID', VALUE_OPTIONAL),
 288                 'sitecalendartype'  => new external_value(PARAM_PLUGIN, 'Calendar type set in the site.', VALUE_OPTIONAL),
 289                 'usercalendartype'  => new external_value(PARAM_PLUGIN, 'Calendar typed used by the user.', VALUE_OPTIONAL),
 290                 'userissiteadmin'  => new external_value(PARAM_BOOL, 'Whether the user is a site admin or not.', VALUE_OPTIONAL),
 291                 'theme'  => new external_value(PARAM_THEME, 'Current theme for the user.', VALUE_OPTIONAL),
 292                 'limitconcurrentlogins' => new external_value(PARAM_INT, 'Number of concurrent sessions allowed', VALUE_OPTIONAL),
 293                 'usersessionscount' => new external_value(PARAM_INT, 'Number of active sessions for current user.
 294                     Only returned when limitconcurrentlogins is used.', VALUE_OPTIONAL),
 295             )
 296         );
 297     }
 298 }