$id,
':token' => drupal_get_token($id),
))->fetchField();
if ($batch) {
return unserialize($batch);
}
return FALSE;
}
/**
* Renders the batch processing page based on the current state of the batch.
*
* @see _batch_shutdown()
*/
function _batch_page() {
$batch = &batch_get();
if (!isset($_REQUEST['id'])) {
return FALSE;
}
// Retrieve the current state of the batch.
if (!$batch) {
$batch = batch_load($_REQUEST['id']);
if (!$batch) {
drupal_set_message(t('No active batch.'), 'error');
drupal_goto();
}
}
// Register database update for the end of processing.
drupal_register_shutdown_function('_batch_shutdown');
// Add batch-specific CSS.
foreach ($batch['sets'] as $batch_set) {
if (isset($batch_set['css'])) {
foreach ($batch_set['css'] as $css) {
drupal_add_css($css);
}
}
}
$op = isset($_REQUEST['op']) ? $_REQUEST['op'] : '';
$output = NULL;
switch ($op) {
case 'start':
$output = _batch_start();
break;
case 'do':
// JavaScript-based progress page callback.
_batch_do();
break;
case 'do_nojs':
// Non-JavaScript-based progress page.
$output = _batch_progress_page_nojs();
break;
case 'finished':
$output = _batch_finished();
break;
}
return $output;
}
/**
* Initializes the batch processing.
*
* JavaScript-enabled clients are identified by the 'has_js' cookie set in
* drupal.js. If no JavaScript-enabled page has been visited during the current
* user's browser session, the non-JavaScript version is returned.
*/
function _batch_start() {
if (isset($_COOKIE['has_js']) && $_COOKIE['has_js']) {
return _batch_progress_page_js();
}
else {
return _batch_progress_page_nojs();
}
}
/**
* Outputs a batch processing page with JavaScript support.
*
* This initializes the batch and error messages. Note that in JavaScript-based
* processing, the batch processing page is displayed only once and updated via
* AHAH requests, so only the first batch set gets to define the page title.
* Titles specified by subsequent batch sets are not displayed.
*
* @see batch_set()
* @see _batch_do()
*/
function _batch_progress_page_js() {
$batch = batch_get();
$current_set = _batch_current_set();
drupal_set_title($current_set['title'], PASS_THROUGH);
// Merge required query parameters for batch processing into those provided by
// batch_set() or hook_batch_alter().
$batch['url_options']['query']['id'] = $batch['id'];
$js_setting = array(
'batch' => array(
'errorMessage' => $current_set['error_message'] . '
' . $batch['error_message'],
'initMessage' => $current_set['init_message'],
'uri' => url($batch['url'], $batch['url_options']),
),
);
drupal_add_js($js_setting, 'setting');
drupal_add_library('system', 'drupal.batch');
return '';
}
/**
* Does one execution pass with JavaScript and returns progress to the browser.
*
* @see _batch_progress_page_js()
* @see _batch_process()
*/
function _batch_do() {
// HTTP POST required.
if ($_SERVER['REQUEST_METHOD'] != 'POST') {
drupal_set_message(t('HTTP POST is required.'), 'error');
drupal_set_title(t('Error'));
return '';
}
// Perform actual processing.
list($percentage, $message) = _batch_process();
drupal_json_output(array('status' => TRUE, 'percentage' => $percentage, 'message' => $message));
}
/**
* Outputs a batch processing page without JavaScript support.
*
* @see _batch_process()
*/
function _batch_progress_page_nojs() {
$batch = &batch_get();
$current_set = _batch_current_set();
drupal_set_title($current_set['title'], PASS_THROUGH);
$new_op = 'do_nojs';
if (!isset($batch['running'])) {
// This is the first page so we return some output immediately.
$percentage = 0;
$message = $current_set['init_message'];
$batch['running'] = TRUE;
}
else {
// This is one of the later requests; do some processing first.
// Error handling: if PHP dies due to a fatal error (e.g. a nonexistent
// function), it will output whatever is in the output buffer, followed by
// the error message.
ob_start();
$fallback = $current_set['error_message'] . '
' . $batch['error_message'];
$fallback = theme('maintenance_page', array('content' => $fallback, 'show_messages' => FALSE));
// We strip the end of the page using a marker in the template, so any
// additional HTML output by PHP shows up inside the page rather than below
// it. While this causes invalid HTML, the same would be true if we didn't,
// as content is not allowed to appear after