remote_image.module

<?php
/**
 * @file
 * Code for the remote_image feature.
 */

/**
 * Implements hook_action_info
 * @return array associative array of action descriptions
 */
function remote_image_action_info() {
  return array(
    'remote_image_get_remote_image' => array(
      'type' => 'node',
      'label' => t('Pull the remote images into their local image fields'),
      'behavior' => array('changes_property'),
      'configurable' => FALSE,
      'vbo_configurable' => TRUE,
      'triggers' => array('any'),
    ),
  );
}


function remote_image_get_remote_image_views_bulk_operations_form($options) {
  $form = array();
  $form['remote_image_url_field'] = array(
    '#type' => 'textfield',
    '#title' => t('Machine name of the image URL field'),
    '#size' => 60,
    '#maxlength' => 128,
    '#required' => TRUE,
    '#default_value' => !empty($options['remote_image_url_field']) ? $options['remote_image_url_field'] : '',
  );
  $form['remote_image_image_field'] = array(
    '#type' => 'textfield',
    '#title' => t('Machine name of the field where the image will be stored'),
    '#size' => 60,
    '#maxlength' => 128,
    '#required' => TRUE,
    '#default_value' => !empty($options['remote_image_image_field']) ? $options['remote_image_image_field'] : '',
  );
  $form['remote_image_filename_field'] = array(
    '#type' => 'textfield',
    '#title' => t('Machine name of the field that holds the image file name'),
    '#size' => 60,
    '#maxlength' => 128,
    '#required' => TRUE,
    '#default_value' => !empty($options['remote_image_filename_field']) ? $options['remote_image_filename_field'] : '',
  );
  $form['remote_image_file_path'] = array(
    '#type' => 'textfield',
    '#title' => t('Directory to store the file in (this directory must already exist)'),
    '#size' => 60,
    '#maxlength' => 128,
    '#required' => TRUE,
    '#default_value' => !empty($options['remote_image_file_path']) ? $options['remote_image_file_path'] : 'public://remote_image',
  );
  $form['remote_image_replace_existing'] = array(
    '#type' => 'checkbox',
    '#title' => t('Replace all existing images'),
    '#default_value' => empty($options['remote_image_replace_existing']) ? $options['remote_image_replace_existing'] : 0,
  );

  return $form;
}

function remote_image_get_remote_image_form($settings, &$form_state) {
  $form = remote_image_get_remote_image_views_bulk_operations_form($settings['settings']);
  return $form;
}

function remote_image_get_remote_image_submit($form, $form_state) {
  $return = array();
  $return['remote_image_url_field'] = $form_state['values']['remote_image_url_field'];
  $return['remote_image_image_field'] = $form_state['values']['remote_image_image_field'];
  $return['remote_image_filename_field'] = $form_state['values']['remote_image_filename_field'];
  $return['remote_image_file_path'] = $form_state['values']['remote_image_file_path'];
  $return['remote_image_replace_existing'] = $form_state['values']['remote_image_replace_existing'];
  return $return;
}

function remote_image_get_remote_image(&$node, $context) {
  $url_field = $context['remote_image_url_field'];
  $image_field = $context['remote_image_image_field'];
  $filename_field = $context['remote_image_filename_field'];
  $wrapper = entity_metadata_wrapper('node', $node);
  $image = $wrapper->$image_field->value();
  if (!empty($image['uri']) && ($context['remote_image_replace_existing'] == 0)) {
    return;
  }
  $url = $wrapper->$url_field->value();
  if (isset($url['url'])) {
    $options = array(
      'max_redirects' => 6,
      'timeout' => 60.0,
      );
    $result = drupal_http_request($url['url'], $options);
    if ($result->code == 200) {
      $filename = $wrapper->$filename_field->value();
      $path = $context['remote_image_file_path'] . '/' . $filename;
      $file_object = file_save_data($result->data, $path, FILE_EXISTS_REPLACE);
      if ($file_object !== FALSE) {
        $wrapper->$image_field->file->set($file_object);
        $wrapper->save();
      }
      else {
        drupal_set_message(t('Could not save image for @title', array('@title' => $wrapper->title->value())), 'status', FALSE);
      }
    }
    else {
      drupal_set_message(t('Could not get image from @path - error @err',
        array('@path' => $url['url'], '@err' => $result->code)), 'status', FALSE);
    }

  }
}

function _remote_image_save_file($data, $path) {

}