Untitled

<?php
/*
 * Hook into the backend and load scripts and
 * init metabox.
 */
function ds_gist2wordpress_admin() {
                add_action( 'wp_ajax_gist', 'ds_gistify' );

                add_action( 'admin_print_scripts-post.php', 'ds_gist_js' );
                add_action( 'admin_print_scripts-post-new.php', 'ds_gist_js' );

                wp_register_script(
                        'gist-js',
                        get_bloginfo( 'template_url' ) . "/gist.js",
                        array( 'jquery' ),
                        0.1,
                        true
                );

                add_meta_box(
                                'ds_gist',
                                'Gist',
                                'ds_gist_metabox_cb',
                                'post'
                );
}
add_action( 'admin_init', 'ds_gist2wordpress_admin' );

/*
 * Hook into the frontend and load scripts.
 */
function ds_gist2wordpress() {
                wp_register_style(
                        'gist-css',
                        'https://gist.github.com/stylesheets/gist/embed.css'
                );

                add_filter( 'the_content', 'ds_convert_to_gist', 99 );
}
add_action( 'init', 'ds_gist2wordpress' );

/*
 * Helper for enqeueing script
 */
function ds_gist_js() {
        wp_enqueue_script( 'gist-js' );
}

/*
 * Add a metabox the post edit screen with an input field for the gist ID
 * and show the file list.
 */
function ds_gist_metabox_cb( $data ) {
        wp_nonce_field( 'ds_gist', 'ds-gist-nonce' );

        $gist_id   = get_post_meta( $data->ID, '_gist_id', true ) ;
        $gist_id   = ! empty( $gist_id ) ? $gist_id : '';
        $gist_data = get_post_meta( $data->ID, '_gist_data', true );
        $gist_data = ! empty( $gist_data ) ? $gist_data : array();

        $files = '';
        if ( ! empty( $gist_data ) ) {
                foreach ( $gist_data as $file => $data )
                        $files .= '<li><code>{' . $file . '}</code></li>';
        }
        ?>
        <p>
                <label>Gist ID: <input type="text" class="small-text" style="width: 180px;" name="gist-id" id="gist-id" value="<?php echo esc_attr( $gist_id ); ?>" /></label>
                <input type="button" value="Fetch" id="gist-update" class="button" />
                <img src="<?php echo esc_url( admin_url( 'images/wpspin_light.gif' ) ); ?>" class="ajax-loading" id="gist-ajax-loading" alt="" />
        </p>
        <ul id="gist-files">
                <?php echo $files;?>
        </ul>
        <?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
        ) ) );
}

/*
 * 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;
}