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   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  
  81          $userpicture = new user_picture($USER);
  82          $userpicture->size = 1; // Size f1.
  83          $profileimageurl = $userpicture->get_url($PAGE);
  84  
  85          // Site information.
  86          $siteinfo =  array(
  87              'sitename' => $SITE->fullname,
  88              'siteurl' => $CFG->wwwroot,
  89              'username' => $USER->username,
  90              'firstname' => $USER->firstname,
  91              'lastname' => $USER->lastname,
  92              'fullname' => fullname($USER),
  93              'lang' => current_language(),
  94              'userid' => $USER->id,
  95              'userpictureurl' => $profileimageurl->out(false)
  96          );
  97  
  98          // Retrieve the service and functions from the web service linked to the token
  99          // If you call this function directly from external (not a web service call),
 100          // then it will still return site info without information about a service
 101          // Note: wsusername/wspassword ws authentication is not supported.
 102          $functions = array();
 103          if ($CFG->enablewebservices) { // No need to check token if web service are disabled and not a ws call.
 104              $token = optional_param('wstoken', '', PARAM_ALPHANUM);
 105  
 106              if (!empty($token)) { // No need to run if not a ws call.
 107                  // Retrieve service shortname.
 108                  $servicesql = 'SELECT s.*
 109                                 FROM {external_services} s, {external_tokens} t
 110                                 WHERE t.externalserviceid = s.id AND token = ? AND t.userid = ? AND s.enabled = 1';
 111                  $service = $DB->get_record_sql($servicesql, array($token, $USER->id));
 112  
 113                  $siteinfo['downloadfiles'] = $service->downloadfiles;
 114                  $siteinfo['uploadfiles'] = $service->uploadfiles;
 115  
 116                  if (!empty($service)) {
 117                      // Return the release and version number for web service users only.
 118                      $siteinfo['release'] = $CFG->release;
 119                      $siteinfo['version'] = $CFG->version;
 120                      // Retrieve the functions.
 121                      $functionssql = "SELECT f.*
 122                              FROM {external_functions} f, {external_services_functions} sf
 123                              WHERE f.name = sf.functionname AND sf.externalserviceid = ?";
 124                      $functions = $DB->get_records_sql($functionssql, array($service->id));
 125                  } else {
 126                      throw new coding_exception('No service found in get_site_info: something is buggy, \
 127                                                  it should have fail at the ws server authentication layer.');
 128                  }
 129              }
 130          }
 131  
 132          // Build up the returned values of the list of functions.
 133          $componentversions = array();
 134          $availablefunctions = array();
 135          foreach ($functions as $function) {
 136              $functioninfo = array();
 137              $functioninfo['name'] = $function->name;
 138              if ($function->component == 'moodle' || $function->component == 'core') {
 139                  $version = $CFG->version; // Moodle version.
 140              } else {
 141                  $versionpath = core_component::get_component_directory($function->component).'/version.php';
 142                  if (is_readable($versionpath)) {
 143                      // We store the component version once retrieved (so we don't load twice the version.php).
 144                      if (!isset($componentversions[$function->component])) {
 145                          $plugin = new stdClass();
 146                          include($versionpath);
 147                          $componentversions[$function->component] = $plugin->version;
 148                          $version = $plugin->version;
 149                      } else {
 150                          $version = $componentversions[$function->component];
 151                      }
 152                  } else {
 153                      // Function component should always have a version.php,
 154                      // otherwise the function should have been described with component => 'moodle'.
 155                      throw new moodle_exception('missingversionfile', 'webservice', '', $function->component);
 156                  }
 157              }
 158              $functioninfo['version'] = $version;
 159              $availablefunctions[] = $functioninfo;
 160          }
 161  
 162          $siteinfo['functions'] = $availablefunctions;
 163  
 164          // Mobile CSS theme and alternative login url.
 165          $siteinfo['mobilecssurl'] = $CFG->mobilecssurl;
 166  
 167          // Retrieve some advanced features. Only enable/disable ones (bool).
 168          $advancedfeatures = array("usecomments", "usetags", "enablenotes", "messaging", "enableblogs",
 169                                      "enablecompletion", "enablebadges");
 170          foreach ($advancedfeatures as $feature) {
 171              if (isset($CFG->{$feature})) {
 172                  $siteinfo['advancedfeatures'][] = array(
 173                      'name' => $feature,
 174                      'value' => (int) $CFG->{$feature}
 175                  );
 176              }
 177          }
 178          // Special case mnet_dispatcher_mode.
 179          $siteinfo['advancedfeatures'][] = array(
 180              'name' => 'mnet_dispatcher_mode',
 181              'value' => ($CFG->mnet_dispatcher_mode == 'strict') ? 1 : 0
 182          );
 183  
 184          // User can manage own files.
 185          $siteinfo['usercanmanageownfiles'] = has_capability('moodle/user:manageownfiles', $context);
 186  
 187          // User quota. 0 means user can ignore the quota.
 188          $siteinfo['userquota'] = 0;
 189          if (!has_capability('moodle/user:ignoreuserquota', $context)) {
 190              $siteinfo['userquota'] = $CFG->userquota;
 191          }
 192  
 193          // User max upload file size. -1 means the user can ignore the upload file size.
 194          $siteinfo['usermaxuploadfilesize'] = get_user_max_upload_file_size($context, $CFG->maxbytes);
 195  
 196          // User home page.
 197          $siteinfo['userhomepage'] = get_home_page();
 198  
 199          return $siteinfo;
 200      }
 201  
 202      /**
 203       * Returns description of method result value
 204       *
 205       * @return external_single_structure
 206       * @since Moodle 2.2
 207       */
 208      public static function get_site_info_returns() {
 209          return new external_single_structure(
 210              array(
 211                  'sitename'       => new external_value(PARAM_RAW, 'site name'),
 212                  'username'       => new external_value(PARAM_RAW, 'username'),
 213                  'firstname'      => new external_value(PARAM_TEXT, 'first name'),
 214                  'lastname'       => new external_value(PARAM_TEXT, 'last name'),
 215                  'fullname'       => new external_value(PARAM_TEXT, 'user full name'),
 216                  'lang'           => new external_value(PARAM_LANG, 'user language'),
 217                  'userid'         => new external_value(PARAM_INT, 'user id'),
 218                  'siteurl'        => new external_value(PARAM_RAW, 'site url'),
 219                  'userpictureurl' => new external_value(PARAM_URL, 'the user profile picture.
 220                      Warning: this url is the public URL that only works when forcelogin is set to NO and guestaccess is set to YES.
 221                      In order to retrieve user profile pictures independently of the Moodle config, replace "pluginfile.php" by
 222                      "webservice/pluginfile.php?token=WSTOKEN&file="
 223                      Of course the user can only see profile picture depending
 224                      on his/her permissions. Moreover it is recommended to use HTTPS too.'),
 225                  'functions'      => new external_multiple_structure(
 226                      new external_single_structure(
 227                          array(
 228                              'name' => new external_value(PARAM_RAW, 'function name'),
 229                              'version' => new external_value(PARAM_TEXT,
 230                                          'The version number of the component to which the function belongs')
 231                          ), 'functions that are available')
 232                      ),
 233                  'downloadfiles'  => new external_value(PARAM_INT, '1 if users are allowed to download files, 0 if not',
 234                                                         VALUE_OPTIONAL),
 235                  'uploadfiles'  => new external_value(PARAM_INT, '1 if users are allowed to upload files, 0 if not',
 236                                                         VALUE_OPTIONAL),
 237                  'release'  => new external_value(PARAM_TEXT, 'Moodle release number', VALUE_OPTIONAL),
 238                  'version'  => new external_value(PARAM_TEXT, 'Moodle version number', VALUE_OPTIONAL),
 239                  'mobilecssurl'  => new external_value(PARAM_URL, 'Mobile custom CSS theme', VALUE_OPTIONAL),
 240                  'advancedfeatures' => new external_multiple_structure(
 241                      new external_single_structure(
 242                          array(
 243                              'name'  => new external_value(PARAM_ALPHANUMEXT, 'feature name'),
 244                              'value' => new external_value(PARAM_INT, 'feature value. Usually 1 means enabled.')
 245                          ),
 246                          'Advanced features availability'
 247                      ),
 248                      'Advanced features availability',
 249                      VALUE_OPTIONAL
 250                  ),
 251                  'usercanmanageownfiles' => new external_value(PARAM_BOOL,
 252                                              'true if the user can manage his own files', VALUE_OPTIONAL),
 253                  'userquota' => new external_value(PARAM_INT,
 254                                      'user quota (bytes). 0 means user can ignore the quota', VALUE_OPTIONAL),
 255                  'usermaxuploadfilesize' => new external_value(PARAM_INT,
 256                                              'user max upload file size (bytes). -1 means the user can ignore the upload file size',
 257                                              VALUE_OPTIONAL),
 258                  'userhomepage' => new external_value(PARAM_INT,
 259                                                          'the default home page for the user: 0 for the site home, 1 for dashboard',
 260                                                          VALUE_OPTIONAL)
 261              )
 262          );
 263      }
 264  }