Untitled

<?php
/*
 * Replace {Filename} with associated snippet from the
 * custom fields.
 */
function ds_gistify() {
        $post_id = intval( $_POST['post_id'] );
        $gist_id = sanitize_key( $_POST['gist_id'] );
        if ( empty( $post_id ) || empty( $gist_id ) )
                die( json_encode( array(
                        'id'    => $gist_id,
                        'error' => 'Empty Post ID or Gist ID.'
                ) ) );

        check_ajax_referer( 'ds_gist' );

        $gist_body = wp_remote_retrieve_body(
                wp_remote_get(
                                $gist_url = sprintf( "https://gist.github.com/%s.json", $gist_id )
                )
        );
        $gist_body = json_decode( $gist_body );

        if ( empty( $gist_body ) )
                die( json_encode( array(
                        'id'    => $gist_id,
                        'error' => 'Empty Body'
                ) ) );

        if ( ! empty( $gist_body->error ) ) {
                die( json_encode( array(
                        'id'    => $gist_id,
                        'error' => $gist_body->error
                ) ) );
        }

        update_post_meta( $post_id, '_gist_id', $gist_id );

        $gist_files = $gist_body->files;

        preg_match_all( '/<pre>(.+?)<\/pre>/is', $gist_body->div, $gist_divs );
        $gist_divs = $gist_divs[0];

        foreach ( $gist_files as $i => $gist_file )
                $gist_data[ $gist_file ] = '<div class="gist-syntax">' . $gist_divs[$i] . '</div>';

        foreach ( $gist_data as $file => $gist_item ) {
                $gist_new_meta = sprintf(
                        '<div><p class="gist-meta"><a class="gist-raw" href="%s">RAW</a> · <a class="gist-download" href="%s">Download</a> · <a class="gist-github" href="%s">Gist@GitHub</a></p></div>',
                        esc_url( "https://gist.github.com/raw/{$gist_id}/{$file}" ),
                        esc_url( "https://gist.github.com/gists/{$gist_id}/download"),
                        esc_url( "https://gist.github.com/{$gist_id}")
                );
                $gist_data[ $file ] .= $gist_new_meta;
        }

        update_post_meta( $post_id, '_gist_data', $gist_data );

        die( json_encode( array(
                'id'    => $gist_id,
                'files' => $gist_files
        ) ) );
}