/**
* Filters post meta retrieval to get values from the actual autosave post,
* and not its parent. Filters revisioned meta keys only.
*
* @since 3.6.0
* @access private
*/
function _wp_preview_meta_filter($value, $object_id, $meta_key, $single)
{
$post = get_post();
if ($post->ID != $object_id || !in_array($meta_key, _wp_post_revision_meta_keys()) || 'revision' == $post->post_type) {
return $value;
}
$preview = wp_get_post_autosave($post->ID);
if (!is_object($preview)) {
return $value;
}
return get_post_meta($preview->ID, $meta_key, $single);
}
/**
* Creates autosave data for the specified post from $_POST data.
*
* @package WordPress
* @subpackage Post_Revisions
* @since 2.6.0
*
* @uses _wp_translate_postdata()
* @uses _wp_post_revision_fields()
*
* @return unknown
*/
function wp_create_post_autosave($post_id)
{
$translated = _wp_translate_postdata(true);
if (is_wp_error($translated)) {
return $translated;
}
$post_author = get_current_user_id();
// Store one autosave per author. If there is already an autosave, overwrite it.
if ($old_autosave = wp_get_post_autosave($post_id, $post_author)) {
$new_autosave = _wp_post_revision_fields($_POST, true);
$new_autosave['ID'] = $old_autosave->ID;
$new_autosave['post_author'] = $post_author;
// Auto-save revisioned meta fields.
foreach (_wp_post_revision_meta_keys() as $meta_key) {
if (isset($_POST[$meta_key]) && get_post_meta($new_autosave['ID'], $meta_key, true) != $_POST[$meta_key]) {
// Use the underlying delete_metadata and add_metadata vs delete_post_meta
// and add_post_meta to make sure we're working with the actual revision meta.
delete_metadata('post', $new_autosave['ID'], $meta_key);
if (!empty($_POST[$meta_key])) {
add_metadata('post', $new_autosave['ID'], $meta_key, $_POST[$meta_key]);
}
}
}
// Save the post format if different
if (isset($_POST['post_format']) && get_post_meta($new_autosave['ID'], '_revision_post_format', true) != $_POST['post_format']) {
delete_metadata('post', $new_autosave['ID'], '_revision_post_format');
if (!empty($_POST['post_format'])) {
add_metadata('post', $new_autosave['ID'], '_revision_post_format', $_POST['post_format']);
}
}
return wp_update_post($new_autosave);
}
// _wp_put_post_revision() expects unescaped.
$_POST = wp_unslash($_POST);
// Otherwise create the new autosave as a special post revision
return _wp_put_post_revision($_POST, true);
}
