<?php
/*
 * AJAX callback function which handles the API response. Saves the data
 * into custom fields
 */
function ds_convert_to_gist( $content ) {
	$gist_data = get_post_meta( get_the_ID(), '_gist_data', true );

	if ( empty( $gist_data ) )
		return $content;

	wp_enqueue_style('gist-css');

	foreach ( $gist_data as $file => $file_data ) {
		$files[] = '/{' . $file . '}/';
		$data[]  = $file_data;
	}

	$content = preg_replace(
		$files,
		$data,
		$content
	);

	return $content;
}