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✏️ Editing: h5p-event-base.class.php

<?php

namespace Moodle;

/**
 * The base class for H5P events. Extend to track H5P events in your system.
 *
 * @package    H5P
 * @copyright  2016 Joubel AS
 * @license    MIT
 */
abstract class H5PEventBase {
  // Constants
  const LOG_NONE = 0;
  const LOG_ALL = 1;
  const LOG_ACTIONS = 2;

// Static options
  public static $log_level = self::LOG_ACTIONS;
  public static $log_time = 2592000; // 30 Days

// Protected variables
  protected $id, $type, $sub_type, $content_id, $content_title, $library_name, $library_version, $time;

/**
   * Adds event type, h5p library and timestamp to event before saving it.
   *
   * Common event types with sub type:
   *  content, <none> – content view
   *           embed – viewed through embed code
   *           shortcode – viewed through internal shortcode
   *           edit – opened in editor
   *           delete – deleted
   *           create – created through editor
   *           create upload – created through upload
   *           update – updated through editor
   *           update upload – updated through upload
   *           upgrade – upgraded
   *
   *  results, <none> – view own results
   *           content – view results for content
   *           set – new results inserted or updated
   *
   *  settings, <none> – settings page loaded
   *
   *  library, <none> – loaded in editor
   *           create – new library installed
   *           update – old library updated
   *
   * @param string $type
   *  Name of event type
   * @param string $sub_type
   *  Name of event sub type
   * @param string $content_id
   *  Identifier for content affected by the event
   * @param string $content_title
   *  Content title (makes it easier to know which content was deleted etc.)
   * @param string $library_name
   *  Name of the library affected by the event
   * @param string $library_version
   *  Library version
   */
  function __construct($type, $sub_type = NULL, $content_id = NULL, $content_title = NULL, $library_name = NULL, $library_version = NULL) {
    $this->type = $type;
    $this->sub_type = $sub_type;
    $this->content_id = $content_id;
    $this->content_title = $content_title;
    $this->library_name = $library_name;
    $this->library_version = $library_version;
    $this->time = time();

if (self::validLogLevel($type, $sub_type)) {
      $this->save();
    }
    if (self::validStats($type, $sub_type)) {
      $this->saveStats();
    }
  }

/**
   * Determines if the event type should be saved/logged.
   *
   * @param string $type
   *  Name of event type
   * @param string $sub_type
   *  Name of event sub type
   * @return boolean
   */
  private static function validLogLevel($type, $sub_type) {
    switch (self::$log_level) {
      default:
      case self::LOG_NONE:
        return FALSE;
      case self::LOG_ALL:
        return TRUE; // Log everything
      case self::LOG_ACTIONS:
        if (self::isAction($type, $sub_type)) {
          return TRUE; // Log actions
        }
        return FALSE;
    }
  }

/**
   * Check if the event should be included in the statistics counter.
   *
   * @param string $type
   *  Name of event type
   * @param string $sub_type
   *  Name of event sub type
   * @return boolean
   */
  private static function validStats($type, $sub_type) {
    if ( ($type === 'content' && $sub_type === 'shortcode insert') || // Count number of shortcode inserts
         ($type === 'library' && $sub_type === NULL) || // Count number of times library is loaded in editor
         ($type === 'results' && $sub_type === 'content') ) { // Count number of times results page has been opened
      return TRUE;
    }
    elseif (self::isAction($type, $sub_type)) { // Count all actions
      return TRUE;
    }
    return FALSE;
  }

/**
   * Check if event type is an action.
   *
   * @param string $type
   *  Name of event type
   * @param string $sub_type
   *  Name of event sub type
   * @return boolean
   */
  private static function isAction($type, $sub_type) {
    if ( ($type === 'content' && in_array($sub_type, array('create', 'create upload', 'update', 'update upload', 'upgrade', 'delete'))) ||
         ($type === 'library' && in_array($sub_type, array('create', 'update'))) ) {
      return TRUE; // Log actions
    }
    return FALSE;
  }

/**
   * A helper which makes it easier for systems to save the data.
   * Add all relevant properties to a assoc. array.
   * There are no NULL values. Empty string or 0 is used instead.
   * Used by both Drupal and WordPress.
   *
   * @return array with keyed values
   */
  protected function getDataArray() {
    return array(
      'created_at' => $this->time,
      'type' => $this->type,
      'sub_type' => empty($this->sub_type) ? '' : $this->sub_type,
      'content_id' => empty($this->content_id) ? 0 : $this->content_id,
      'content_title' => empty($this->content_title) ? '' : $this->content_title,
      'library_name' => empty($this->library_name) ? '' : $this->library_name,
      'library_version' => empty($this->library_version) ? '' : $this->library_version
    );
  }

/**
   * A helper which makes it easier for systems to save the data.
   * Used in WordPress.
   *
   * @return array with strings
   */
  protected function getFormatArray() {
    return array(
      '%d',
      '%s',
      '%s',
      '%d',
      '%s',
      '%s',
      '%s'
    );
  }

/**
   * Stores the event data in the database.
   *
   * Must be overridden by plugin.
   */
  abstract protected function save();

/**
   * Add current event data to statistics counter.
   *
   * Must be overridden by plugin.
   */
  abstract protected function saveStats();
}

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