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   1  <?php
   2  // This file is part of Moodle - https://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   * Provides the {@link \core_analytics\stats} class.
  19   *
  20   * @package     core_analytics
  21   * @copyright   2019 David Mudrák <david@moodle.com>
  22   * @license     http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  23   */
  24  
  25  namespace core_analytics;
  26  
  27  defined('MOODLE_INTERNAL') || die();
  28  
  29  /**
  30   * Provides stats and meta information about the analytics usage on this site.
  31   *
  32   * @copyright 2019 David Mudrák <david@moodle.com>
  33   * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  34   */
  35  class stats {
  36  
  37      /**
  38       * Return the number of models enabled on this site.
  39       *
  40       * @return int
  41       */
  42      public static function enabled_models() : int {
  43          return count(manager::get_all_models(true));
  44      }
  45  
  46      /**
  47       * Return the number of predictions generated by the system.
  48       *
  49       * @return int
  50       */
  51      public static function predictions() : int {
  52          global $DB;
  53  
  54          return $DB->count_records('analytics_predictions');
  55      }
  56  
  57      /**
  58       * Return the number of suggested actions executed by users.
  59       *
  60       * @return int
  61       */
  62      public static function actions() : int {
  63          global $DB;
  64  
  65          return $DB->count_records('analytics_prediction_actions');
  66      }
  67  
  68      /**
  69       * Return the number of suggested actions flagged as not useful.
  70       *
  71       * @return int
  72       */
  73      public static function actions_not_useful() : int {
  74          global $DB;
  75  
  76          // Simple version using core's TYPE_NEGATIVE actions.
  77          return $DB->count_records_select('analytics_prediction_actions',
  78              'actionname = :notuseful OR actionname = :incorrectlyflagged',
  79              ['notuseful' => prediction::ACTION_NOT_USEFUL, 'incorrectlyflagged' => prediction::ACTION_INCORRECTLY_FLAGGED]);
  80      }
  81  }