<?php

/**
 * @mainpage Mail Editor module
 *
 * This module enables administrators to alter and translate mail templates
 * for use by supporting client modules.
 *
 * Support for the user emails and Logintoboggan's emails is included with
 * Mail Editor.
 */

/**
 * @file
 * Mail Editor module.
 */

/**
 * Implements hook_permission().
 *
 * @return array
 */
function mail_edit_permission() {
  return array(
    'administer mail templates' => array(
      'description' => t('Change the templates used for creating mail messages to send to users.'),
      'title' => t('Administer mail templates'),
    ),
  );
}

/**
 * Implements hook_menu().
 *
 * @return array
 */
function mail_edit_menu() {
  $items['admin/config/system/mail-edit'] = array(
    'access callback' => 'mail_edit_access',
    'file' => 'mail_edit.admin.inc',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('mail_edit_list_form'),
    'description' => 'Edit mails being sent out by Drupal.',
    'title' => 'Mail templates',
  );
  $items['admin/config/system/mail-edit/purge/%'] = array(
    'access callback' => 'mail_edit_access',
    'file' => 'mail_edit.admin.inc',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('mail_edit_purge_mailkey', 5),
    'type' => MENU_CALLBACK,
  );
  $items['admin/config/system/mail-edit/%/%'] = array(
    'access callback' => 'mail_edit_access',
    'file' => 'mail_edit.admin.inc',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('mail_edit_template_form', 4, 5),
    'type' => MENU_CALLBACK,
  );
  $items['admin/config/system/mail-edit/%/%/remove'] = array(
    'access callback' => 'mail_edit_access',
    'file' => 'mail_edit.admin.inc',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('mail_edit_template_remove_confirm', 4, 5),
    'type' => MENU_CALLBACK,
  );
  return $items;
}

/**
 * Checks the current user's access to Mail Edit's pages.
 *
 * @return bool
 */
function mail_edit_access() {
  return user_access('administer mail templates') && user_access('access administration pages');
}

/**
 * Implements hook_theme().
 *
 * @return array
 */
function mail_edit_theme() {
  return array(
    'mail_edit_table' => array(
      'render element' => 'form',
      'file' => 'mail_edit.admin.inc',
    ),
    'mail_edit_list_filter' => array(
      'render element' => 'form',
      'file' => 'mail_edit.admin.inc',
    ),
  );
}

/**
 * Implements hook_mail_alter().
 *
 * @param array $message
 */
function mail_edit_mail_alter(array &$message) {
  _mail_edit_module_load_include('alter.inc');
  _mail_edit_mail_alter($message);
}

/**
 * Loads and returns a template.
 *
 * If the template has not been customized yet, then hook_mail_edit_text()
 * is called to retrieve the default template, and if the default template's
 * 'always' key is TRUE, then the default template is returned; otherwise NULL.
 *
 * @param string $module
 *   The module requesting the template.
 * @param string $mailkey
 *   The key for the template.
 * @param string|object $language
 *   The language object or language code for the template.
 * @param bool $force_always
 *   Always return the default template if no custom template is stored.
 *
 * @return object|null
 */
function mail_edit_load($module, $mailkey, $language, $force_always = FALSE) {
  _mail_edit_module_load_include('alter.inc');
  return _mail_edit_load($module . '_' . $mailkey, $language, $force_always);
}

/**
 * Formats a text using the supplied template, data, and options.
 *
 * @param string $template
 *   The template to use.
 * @param array $data
 *   The data to be passed on to token_replace().
 * @param array $options
 *   The options to be passed on to token_replace().
 * @param string $context
 *   The context string that can be used to conditionally add or omit text
 *   depending on the context. The default is 'MAIL'.
 *
 * @return string
 */
function mail_edit_format($template, $data, $options = array(), $context = NULL) {
  _mail_edit_module_load_include('alter.inc');
  $context = (isset($context) ? $context : 'MAIL');
  $result = _mail_edit_preprocess($template, $data, $options, $context);
  $result = token_replace($result, $data, $options);
  return $result;
}

/**
 * Implements hook_hook_info().
 *
 * Loads the third-party support include so that their hooks are
 * registered.
 */
function mail_edit_hook_info() {
  _mail_edit_include();
}

/**
 * Implements hook_modules_uninstalled().
 *
 * Removes templates when a module is uninstalled.
 *
 * @param array $modules
 */
function mail_edit_modules_uninstalled(array $modules) {
  _mail_edit_module_load_include('admin.inc');
  _mail_edit_modules_uninstalled($modules);
}

/**
 * Includes the sample third-party hook implementation files.
 */
function _mail_edit_include() {
  _mail_edit_module_load_include('modules/mail_edit', 'user.inc');
  if (module_exists('logintoboggan')) {
    _mail_edit_module_load_include('modules/mail_edit', 'logintoboggan.inc');
  }
}

/**
 * Loads include files once.
 *
 * @param $name_or_ext
 * @param $ext
 *
 * @return bool
 */
function _mail_edit_module_load_include($name_or_ext, $ext = NULL) {
  static $loaded = array();

  if (empty($ext)) {
    $ext = $name_or_ext;
    $name_or_ext = 'mail_edit';
  }
  $key = "$name_or_ext.$ext";
  if (empty($loaded[$key])) {
    $loaded[$key] = (bool) module_load_include($ext, 'mail_edit', $name_or_ext);
  }
  return $loaded[$key];
}

/**
 * Implements hook_menu_breadcrumb_alter().
 *
 * Fixes the breadcrumb for the template edit page.
 *
 * @param $active_trail
 * @param $item
 */
function mail_edit_menu_breadcrumb_alter(&$active_trail, $item) {
  if (isset($item['path']) && $item['path'] == 'admin/config/system/mail-edit/%/%') {
    $active_trail = array($active_trail[0]);
    foreach ($item['map'] as $i) {
      $path = (!isset($path) ? $i : $path . '/' . $i);
      $active_trail[] = menu_get_item($path);
    }
    array_pop($active_trail);
    array_pop($active_trail);
  }
}