<?php
/**
 * fire template_redirect to JSON content
 */
public function json_feeds() {

	// none of this should happen on RSS or admin
	if ( is_admin() || is_feed() )
		return;

	global $wp_query;

	// bail if we dont have the 'pagename' included
	if ( ! isset( $wp_query->query_vars['name'] ) )
		return;

	// shoot the full archives if we're looking for that
	if ( $wp_query->query_vars['name'] == 'archives-json' || $wp_query->query_vars['name'] == 'newsletter_list-json' ) {
		$this->archive_output();
		exit();
	}

	// bail on non nd-archives file
	if ( !isset( $wp_query->query_vars['nd-archives'] ) )
		return;

	// bail if we do have the post type included as just a json URL (bad URL)
	if ( isset( $wp_query->query_vars['name'] ) && $wp_query->query_vars['name'] == 'json' )
		return;

	// do a quick check to ensure we have a json extension
	$query_base	= $wp_query->query_vars['name'];

	// check the slug to make sure it's a parent.
	$base_check	= preg_match( '/^n20/', $query_base );
	if ( !$base_check )
		return;

	// check slug to make sure we are calling json
	$name_check	= preg_match( '/-json/', $query_base );
	if ( !$name_check )
		return;

	$query_name	= str_replace( '-json', '', $query_base );

	// passed all our checks, we're gold
	if ( isset( $wp_query->query_vars['post_type'] ) && $wp_query->query_vars['post_type'] == 'nd-archives' ) {
		$this->single_output( $query_name );
		exit;
	}

	return;

}

/**
 * output JSON data for archive page
 */

public function archive_output() {

	header( 'HTTP/1.1 200' );
	header( 'Content-type: application/json; charset=utf-8' );

	$data	= $this->archive_data();
	$data	= str_replace('\\/', '/', json_encode( $data ) );
	echo $data;

}

/**
 * output JSON data for single issue page
 */

public function single_output( $query_name ) {

	header( 'HTTP/1.1 200' );
	header( 'Content-type: application/json; charset=utf-8' );

	$data	= $this->single_data( $query_name );
	$data	= str_replace('\\/', '/', json_encode( $data ) );
	echo $data;

}

/**
 * create our endpoints
 *
 */

public function json_endpoint() {

	// register our "json" endpoint
	add_rewrite_endpoint( '.json', EP_NONE );

}

/**
 * add JSON into our vars
 */

public function json_vars( $vars ) {

	$vars[] = 'json';
	return $vars;
}