<?php

/**
 * @file
 * Install, update and uninstall functions for the Node Revision module.
 */

/**
 * Implements hook_install().
 */
function node_revision_delete_install() {
  variable_set('node_revision_delete_time', 0);
  variable_set('node_revision_delete_last_execute', 0);
}

/**
 * Implements hook_uninstall().
 */
function node_revision_delete_uninstall() {
  variable_del('node_revision_delete_time');
  variable_del('node_revision_delete_last_execute');
  variable_del('node_revision_delete_cron');
  // Searching the content type machine name.
  $results = db_query("SELECT SUBSTR(name, 28) as name FROM {variable} WHERE name LIKE 'node_revision_delete_track_%'");
  // Deleting the variables.
  foreach ($results as $result) {
    variable_del('node_revision_delete_track_' . $result->name);
    variable_del('node_revision_delete_number_' . $result->name);
  }
}

/**
 * Sets max amount of revisions per content type.
 */
function node_revision_delete_update_7200() {
  // If content types were selected, set the global max to each of them.
  $content_types = variable_get('node_revision_delete_content_type', '');
  if (!empty($content_types)) {
    $content_types = explode(',', $content_types);
    $max = variable_get('node_revision_delete_number');
    if ($max) {
      foreach ($content_types as $type) {
        variable_set('node_revision_delete_track_' . $type, 1);
        variable_set('node_revision_delete_number_' . $type, $max);
      }
    }
  }

  variable_del('node_revision_delete_number');
  variable_del('node_revision_delete_content_type');
}

/**
 * Removes node_revision_delete_time if its values is 0.
 *
 * It was matching a wrong condition in a switch at hook_cron.
 */
function node_revision_delete_update_7201() {
  if (variable_get('node_revision_delete_time') == 0) {
    variable_del('node_revision_delete_time');
  }
}