<?php
// $Id$                        

/**
 * @file                       
 * Mass image import module.
 *
 * This module implements a bulk image import operation and uses
 * code from image_import module.   
 */

/**
 * Implementation of hook_menu().
 */
function mass_image_import_menu() {
  $items['admin/content/mass_image_import'] = array(
    'title'            => t('Mass image import'),
    'description'      => t('Import tons of images at once.'),
    'page callback'    => 'mass_image_import',
    'access arguments' => array('administer content'),
    'type'             => MENU_NORMAL_ITEM,
  );

  return $items;
}

/**
 * Include image_import helper functions.
 */
require_once drupal_get_path('module', 'image_import') .'/image_import.pages.inc';

/**
 * Menu callback.
 */
function mass_image_import() {
  $output  = t('Mass image import.');
  $output .= drupal_get_form('mass_image_import_form');
  return $output;
}

/**
 * Mass import form.
 */
function mass_image_import_form(&$form_state) {
  $form['submit'] = array(
    '#type'  => 'submit',
    '#value' => t('Import images'),
  );
  return $form;
}

/**
 * Handle post-validation form-submission.
 */
function mass_image_import_form_submit($form, &$form_state) {
  // Setup batch configuration
  $batch = array(
    'title'            => t('Importing images'),
    'operations'       => array(array('mass_image_import_batch', array())),
    'finished'         => 'mass_image_import_batch_finished',
    'file'             => drupal_get_path('module', 'bcc') . '/bcc.import.inc',
  );

  // Run batch for operations
  batch_set($batch);
  batch_process();
}

/**
 * Batch operation callback for image import.
 */
function mass_image_import_batch(&$context) {
  if (empty($context['sandbox'])) {
    $files                          = mass_image_import_get_files();
    $context['sandbox']['images']   = $files;
    $context['sandbox']['progress'] = 0;
    $context['sandbox']['max']      = count($files);
  }

  $limit = variable_get('image_import_page_size', 50);

  for ($n = 0; $n <= $limit; $n++) {
    if ($context['sandbox']['progress']++ > $context['sandbox']['max']) {
      $context['finished'] = 1;
      break;
    }

    $context['finished']  = $context['sandbox']['progress'] / $context['sandbox']['max'];
    $image                = $context['sandbox']['images'][$context['sandbox']['progress']];
    $context['results'][] = $image->filename;
    $context['message']   = t('Importing @file...',
        array(
          '@file' => $image->filename,
          ));

    mass_image_import_file($image);
  }
}

/**
 * Make a list of image files.
 *
 * @return
 *   List of available images for import.
 */
function mass_image_import_get_files() {
  $dirpath = variable_get('image_import_path', '');
  if (!file_check_directory($dirpath)) {
    drupal_set_message(
      t("You need to configure the import directory on the image import module's <a href='!admin-settings-import'>settings page</a>.",
      array('!admin-settings-import' => url('admin/settings/image/image_import'))), 'error');
    return;
  }

  // Get file names
  $files = file_scan_directory($dirpath, '.*');
  if (!$files) {
    return;
  }

  // Sort
  ksort($files);

  // Convert to indexed array
  foreach ($files as $file) {
    $images[] = $file;
  }

  return $images;
}

/**
 * Import a single file.
 *
 * @param $file
 *   Image object to import.
 */
function mass_image_import_file($file) {
  $dirpath  = variable_get('image_import_path', '');
  $origname = $file->basename;

  // Debug
  watchdog('bcc', 'Importing '. $origname);

  // Assembly import data
  $file_metadata_modules = module_implements('file_metadata');

  $problems = image_import_validate_file($file);
  // Allow other modules to supply metadata about the images being imported.
  // hook_file_metadata() may populate the $file properties 'title' and
  // 'description'.
  foreach ($file_metadata_modules as $module) {
    $function = $module . '_file_metadata';
    $function($file);
  }

  // Build form
  if ($filepath = file_check_location($dirpath .'/'. $origname, $dirpath)) {
    $args = array(
      'node_type'  => 'image',
      'title'      => isset($file->title) ? $file->title : basename($file->name),
      'body'       => isset($file->body)  ? $file->body  : basename($file->name),
      'taxonomy'   => isset($form_state['values']['taxonomy']) ? $form_state['values']['taxonomy'] : array(),
      'filepath'   => $filepath,
      'origname'   => $origname,
    );
  }

  // Create the node object.
  if ($node = image_create_node_from($args['filepath'], $args['title'], $args['body'], $args['taxonomy'])) {
    // Remove the original image now that the import has completed.
    file_delete($args['filepath']);
  }
  else {
    watchdog('image_import', 'There was an error that prevented %filename from being imported.',
      array('%filename' => $args['filepath']), WATCHDOG_ERROR);
  }
}

/**
 * Callback for image import.
 */
function mass_image_import_batch_finished($success, $results, $operations) {
  if ($success) {
    if ($results > 0) {
      $message = format_plural(count($results), t('One processed.'), t('@count processed.'));
    }
  }
  else {
    $message = t('Finished with an error.'); 
  }
  drupal_set_message($message);
}