File: wp-includes/rest-api/endpoints/class-wp-rest-autosaves-controller.php. View all references

public function create_post_autosave( $post_data ) {

	$post_id = (int) $post_data['ID'];
	$post    = get_post( $post_id );

	if ( is_wp_error( $post ) ) {
		return $post;
	}

	// Only create an autosave when it is different from the saved post.
	$autosave_is_different = false;
	$new_autosave          = _wp_post_revision_data( $post_data, true );

	foreach ( array_intersect( array_keys( $new_autosave ), array_keys( _wp_post_revision_fields( $post ) ) ) as $field ) {
		if ( normalize_whitespace( $new_autosave[ $field ] ) !== normalize_whitespace( $post->$field ) ) {
			$autosave_is_different = true;
			break;
		}
	}

	$user_id = get_current_user_id();

	// Store one autosave per author. If there is already an autosave, overwrite it.
	$old_autosave = wp_get_post_autosave( $post_id, $user_id );

	if ( ! $autosave_is_different && $old_autosave ) {
		// Nothing to save, return the existing autosave.
		return $old_autosave->ID;
	}

	if ( $old_autosave ) {
		$new_autosave['ID']          = $old_autosave->ID;
		$new_autosave['post_author'] = $user_id;

		/** This filter is documented in wp-admin/post.php */
		do_action( 'wp_creating_autosave', $new_autosave );

		// wp_update_post() expects escaped array.
		return wp_update_post( wp_slash( $new_autosave ) );
	}

	// Create the new autosave as a special post revision.
	return _wp_put_post_revision( $post_data, true );
}

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