<?php

/**
 * @file
 * This file contains the admin functions for the Media module.
 */

/**
 * Include media.pages.inc since it has some form definitions we will use.
 */
require_once dirname(__FILE__) . '/media.pages.inc';

/**
 * Form callback for mass import.
 */
function media_import($form, &$form_state) {
  if (!isset($form_state['storage']['files'])) {
    $form_state['storage']['step'] = 'choose';
    $form_state['storage']['next_step'] = 'preview';
    $form['directory'] = array(
      '#type' => 'textfield',
      '#title' => t('Directory'),
      '#description' => t('Enter the absolute directory on the web server to look for files. Subdirectories inside this directory will not be scanned.'),
      '#required' => TRUE,
    );

    $form['pattern'] = array(
      '#type' => 'textarea',
      '#title' => t('Pattern'),
      '#description' => t("Only files matching these patterns will be imported. Enter one pattern per line. The '*' character is a wildcard. Example patterns are %png_example to import all PNG files.", array('%png_example' => '*.png')),
      '#default_value' => '*',
      '#required' => TRUE,
    );

    $form['actions'] = array('#type' => 'actions');
    $form['actions']['submit'] = array(
      '#type' => 'submit',
      '#value' => t('Preview'),
    );
    $form['actions']['cancel'] = array(
      '#type' => 'link',
      '#title' => t('Cancel'),
      '#href' => isset($_GET['destination']) ? $_GET['destination'] : 'admin/content/file',
    );
  }
  else {
    $form['preview'] = array(
      '#markup' => theme('item_list', array('items' => $form_state['storage']['files'])),
    );

    $form = confirm_form($form, t('Import these files?'), 'admin/content/file/import');
  }
  return $form;

}

/**
 * Validate handler for media_import().
 */
function media_import_validate($form, &$form_state) {
  if ($form_state['values']['op'] != t('Confirm')) {
    $directory = $form_state['values']['directory'];
    $pattern = $form_state['values']['pattern'];
    if (!is_dir($directory)) {
      form_set_error('directory', t('The provided directory does not exist.'));
    }
    if (!is_readable($directory)) {
      form_set_error('directory', t('The provided directory is not readable.'));
    }

    $pattern_quoted = preg_quote($pattern, '/');
    $pattern_quoted = preg_replace('/(\r\n?|\n)/', '|', $pattern_quoted);
    $pattern_quoted = strtr($pattern_quoted, array(
      '\\|' => '|',
      '\\*' => '.*',
      '\\?' => '.?',
    ));
    $files = file_scan_directory($directory, '/^(' . $pattern_quoted . ')$/', array('recurse' => FALSE));
    $files = array_keys($files);
    if (empty($files)) {
      form_set_error('pattern', t('No files were found in %directory matching the regular expression %pattern', array('%directory' => $directory, '%pattern' => $pattern_quoted)));
    }
    $form_state['storage']['files'] = $files;
  }
}

/**
 * Submit handler for media_import().
 */
function media_import_submit($form, &$form_state) {
  if ($form_state['values']['op'] == t('Confirm')) {
    $files = $form_state['storage']['files'];
    $batch = array(
      'title' => t('Importing'),
      'operations' => array(
        array('media_import_batch_import_files', array($files)),
      ),
      'finished' => 'media_import_batch_import_complete',
      'file' => drupal_get_path('module', 'media') . '/includes/media.admin.inc',
    );
    batch_set($batch);
    return;

  }
  $form_state['rebuild'] = TRUE;
}

/**
 * BatchAPI callback op for media import.
 */
function media_import_batch_import_files($files, &$context) {
  if (!isset($context['sandbox']['files'])) {
    // This runs the first time the batch runs.
    // This is stupid, but otherwise, I don't think it will work...
    $context['results'] = array('success' => array(), 'errors' => array());
    $context['sandbox']['max'] = count($files);
    $context['sandbox']['files'] = $files;
  }
  $files =& $context['sandbox']['files'];

  // Take a cut of files.  Let's do 10 at a time.
  $import_batch_size = variable_get('media__import_batch_size', 20);
  $length = (count($files) > $import_batch_size) ? $import_batch_size : count($files);
  $to_process = array_splice($files, 0, $length);
  $image_in_message = '';

  foreach ($to_process as $file) {
    try {
      $file_obj = media_parse_to_file($file);
      $context['results']['success'][] = $file;
      if (!$image_in_message) {
        // @todo Is this load step really necessary? When there's time, test
        //   this, and either remove it, or comment why it's needed.
        $loaded_file = file_load($file_obj->fid);
        $image_in_message = file_view_file($loaded_file, 'preview');
      }
    }
    catch (Exception $e) {
      $context['results']['errors'][] = $file . " Reason: " . $e->getMessage();
    }
  }

  $context['message'] = "Importing " . theme('item_list', array('items' => $to_process));
  // Show the image that is being imported.
  $context['message'] .= drupal_render($image_in_message);

  $context['finished'] = ($context['sandbox']['max'] - count($files)) / $context['sandbox']['max'];
}

/**
 * BatchAPI complete callback for media import.
 */
function media_import_batch_import_complete($success, $results, $operations) {
  if ($results['errors']) {
    drupal_set_message(theme('item_list', array('items' => $results['errors'])), 'error');
  }
  if ($results['success']) {
    drupal_set_message(theme('item_list', array('items' => $results['success'])));
  }
}

/**
 * Admin configruation form for media browser settings.
 */
function media_admin_config_browser($form, &$form_state) {
  $theme_options = array();
  $theme_options[NULL] = 'Default administration theme';
  foreach (list_themes() as $key => $theme) {
    if ($theme->status) {
      $theme_options[$key] = $theme->info['name'];
    }
  }

  $form['media__dialog_theme'] = array(
    '#type' => 'select',
    '#title' => t('Media browser theme'),
    '#options' => $theme_options,
    '#description' => t("This theme will be used for all media related dialogs.
      It can be different from your site's theme because many site themes do not
      work well in the small windows which media uses."),
    '#default_value' => variable_get('media__dialog_theme', ''),
  );

  // Additional configuration if the WYSIWYG module is enabled.
  $form['wysiwyg'] = array(
    '#type' => 'fieldset',
    '#title' => t('WYSIWYG configuration'),
    '#collapsible' => TRUE,
    '#collapsed' => FALSE,
    '#access' => module_exists('wysiwyg'),
  );
  $plugins = media_get_browser_plugin_info();
  $form['wysiwyg']['media__wysiwyg_browser_plugins'] = array(
    '#type' => 'checkboxes',
    '#title' => t('Enabled browser plugins'),
    '#options' => array(),
    '#required' => FALSE,
    '#default_value' => variable_get('media__wysiwyg_browser_plugins', array()),
    '#description' => t('If no plugins are selected, they will all be available.'),
  );
  foreach ($plugins as $key => $plugin) {
    $form['wysiwyg']['media__wysiwyg_browser_plugins']['#options'][$key] = !empty($plugin['title']) ? $plugin['title'] : $key;
  }
  $form['wysiwyg']['media__wysiwyg_upload_directory'] = array(
    '#type' => 'textfield',
    '#title' => t("File directory for uploaded media"),
    '#default_value' => variable_get('media__wysiwyg_upload_directory', ''),
    '#description' => t('Optional subdirectory within the upload destination where files will be stored. Do not include preceding or trailing slashes.'),
  );

  if (module_exists('token')) {
    $form['wysiwyg']['media__wysiwyg_upload_directory']['#description'] .= t('This field supports tokens.');
    $form['wysiwyg']['tokens'] = array(
      '#theme' => 'token_tree',
      '#dialog' => TRUE,
    );
  }

  $form['wysiwyg']['media__wysiwyg_allowed_types'] = array(
    '#type' => 'checkboxes',
    '#title' => t('Allowed types in WYSIWYG'),
    '#options' => file_entity_type_get_names(),
    '#default_value' => variable_get('media__wysiwyg_allowed_types', array('audio', 'image', 'video', 'document')),
  );
  $form['array_filter'] = array('#type' => 'value', '#value' => TRUE);

  $form['#submit'][] = 'media_admin_config_browser_pre_submit';
  return system_settings_form($form);
}

/**
 * Manipulate values before form is submitted.
 */
function media_admin_config_browser_pre_submit(&$form, &$form_state) {
  if (!$form_state['values']['media__dialog_theme']) {
    variable_del('media__dialog_theme');
    unset($form_state['values']['media__dialog_theme']);
  }
  $wysiwyg_browser_plugins = array_unique(array_values($form_state['values']['media__wysiwyg_browser_plugins']));
  if (empty($wysiwyg_browser_plugins[0])) {
    variable_del('media__wysiwyg_browser_plugins');
    unset($form_state['values']['media__wysiwyg_browser_plugins']);
  }
}