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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  namespace core_xapi\external;
  18  
  19  use core_xapi\local\state;
  20  use core_xapi\local\statement\item_activity;
  21  use core_xapi\handler;
  22  use core_xapi\xapi_exception;
  23  use core_external\external_api;
  24  use core_external\external_function_parameters;
  25  use core_external\external_value;
  26  use core_xapi\iri;
  27  
  28  /**
  29   * This is the external API for generic xAPI state post.
  30   *
  31   * @package    core_xapi
  32   * @since      Moodle 4.2
  33   * @copyright  2023 Ferran Recio
  34   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  35   */
  36  class post_state extends external_api {
  37  
  38      use \core_xapi\local\helper\state_trait;
  39  
  40      /**
  41       * Parameters for execute
  42       *
  43       * @return external_function_parameters
  44       */
  45      public static function execute_parameters(): external_function_parameters {
  46          return new external_function_parameters([
  47              'component' => new external_value(PARAM_COMPONENT, 'Component name'),
  48              'activityId' => new external_value(PARAM_URL, 'xAPI activity ID IRI'),
  49              'agent' => new external_value(PARAM_RAW, 'The xAPI agent json'),
  50              'stateId' => new external_value(PARAM_ALPHAEXT, 'The xAPI state ID'),
  51              'stateData' => new external_value(PARAM_RAW, 'JSON object with the state data'),
  52              'registration' => new external_value(PARAM_ALPHANUMEXT, 'The xAPI registration UUID', VALUE_DEFAULT, null),
  53          ]);
  54      }
  55  
  56      /**
  57       * Process a state post request.
  58       *
  59       * @param string $component The component name in frankenstyle.
  60       * @param string $activityiri The activity IRI.
  61       * @param string $agent The agent JSON.
  62       * @param string $stateid The xAPI state id.
  63       * @param string $statedata JSON object with the state data
  64       * @param string|null $registration The xAPI registration UUID.
  65       * @return bool
  66       */
  67      public static function execute(
  68          string $component,
  69          string $activityiri,
  70          string $agent,
  71          string $stateid,
  72          string $statedata,
  73          ?string $registration = null
  74      ): bool {
  75  
  76          $params = self::validate_parameters(self::execute_parameters(), [
  77              'component' => $component,
  78              'activityId' => $activityiri,
  79              'agent' => $agent,
  80              'stateId' => $stateid,
  81              'stateData' => $statedata,
  82              'registration' => $registration,
  83          ]);
  84          [
  85              'component' => $component,
  86              'activityId' => $activityiri,
  87              'agent' => $agent,
  88              'stateId' => $stateid,
  89              'stateData' => $statedata,
  90              'registration' => $registration,
  91          ] = $params;
  92  
  93          static::validate_component($component);
  94  
  95          $handler = handler::create($component);
  96          $activityid = iri::extract($activityiri, 'activity');
  97  
  98          $state = new state(
  99              self::get_agent_from_json($agent),
 100              item_activity::create_from_id($activityid),
 101              $stateid,
 102              self::get_statedata_from_json($statedata),
 103              $registration
 104          );
 105  
 106          if (!self::check_state_user($state)) {
 107              throw new xapi_exception('State agent is not the current user');
 108          }
 109  
 110          return $handler->save_state($state);
 111      }
 112  
 113      /**
 114       * Return for execute.
 115       */
 116      public static function execute_returns(): external_value {
 117          return new external_value(PARAM_BOOL, 'If the state is accepted');
 118      }
 119  }