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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 enrol_lti\local\ltiadvantage\repository;
  18  
  19  /**
  20   * The legacy_consumer_repository class, instances of which are responsible for querying LTI 1.1/2.0 consumer info.
  21   *
  22   * @package enrol_lti
  23   * @copyright 2021 Jake Dallimore <jrhdallimore@gmail.com>
  24   * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  25   */
  26  class legacy_consumer_repository {
  27  
  28      /**
  29       * Get a list of all shared secrets which a given LTI 1.1/2.0 consumer is associated with.
  30       *
  31       * A single consumer key may be used across several tool definitions, with different secrets, thus permitting a
  32       * one:many relationship between consumer and secret.
  33       * @param string $consumerkey the key identifying the consumer.
  34       * @return string[] an array of secrets corresponding to the consumer key.
  35       */
  36      public function get_consumer_secrets(string $consumerkey): array {
  37          global $DB;
  38          $sql = "SELECT t.id, t.secret
  39                    FROM {enrol_lti_lti2_consumer} c
  40                    JOIN {enrol_lti_tool_consumer_map} cm
  41                      ON (c.id = cm.consumerid)
  42                    JOIN {enrol_lti_tools} t
  43                      ON (t.id = cm.toolid)
  44                   WHERE c.consumerkey256 = :consumerkey";
  45          return array_unique(array_column($DB->get_records_sql($sql, ['consumerkey' => $consumerkey]), 'secret'));
  46      }
  47  }