<?php

class WPCOM_JSON_API_List_Post_Types_Endpoint extends WPCOM_JSON_API_Endpoint {
	static $post_type_keys_to_include = array(
		'name'         => 'name',
		'label'        => 'label',
		'labels'       => 'labels',
		'description'  => 'description',
		'map_meta_cap' => 'map_meta_cap',
		'cap'          => 'capabilities',
	);

	// /sites/%s/post-types -> $blog_id
	function callback( $path = '', $blog_id = 0 ) {
		$blog_id = $this->api->switch_to_blog_and_validate_user( $this->api->get_blog_id( $blog_id ) );
		if ( is_wp_error( $blog_id ) ) {
			return $blog_id;
		}

		if ( defined( 'IS_WPCOM' ) && IS_WPCOM ) {
			$this->load_theme_functions();
		}

		$args = $this->query_args();

		// API localization occurs after the initial post types have been 
		// registered, so re-register if localizing response
		if ( apply_filters( 'rest_api_localize_response', false ) ) {
			create_initial_post_types();
		}

		$queryable_only = isset( $args['api_queryable'] ) && $args['api_queryable'];

		// Get a list of available post types
		$post_types = get_post_types( array( 'public' => true ) );
		$formatted_post_type_objects = array();

		// Retrieve post type object for each post type
		foreach ( $post_types as $post_type ) {
			// Skip non-queryable if filtering on queryable only
			$is_queryable = $this->is_post_type_allowed( $post_type );
			if ( $queryable_only && ! $is_queryable ) {
				continue;
			}

			$post_type_object = get_post_type_object( $post_type );
			$formatted_post_type_object = array();

			// Include only the desired keys in the response
			foreach ( self::$post_type_keys_to_include as $key => $value ) {
				$formatted_post_type_object[ $value ] = $post_type_object->{ $key };
			}
			$formatted_post_type_object['api_queryable'] = $is_queryable;
			$formatted_post_type_object['supports'] = get_all_post_type_supports( $post_type );
			if ( $this->post_type_supports_tags( $post_type ) ) {
				$formatted_post_type_object['supports']['tags'] = true;
			}

			$formatted_post_type_objects[] = $formatted_post_type_object;
		}

		return array(
			'found' => count( $formatted_post_type_objects ),
			'post_types' => $formatted_post_type_objects
		);
	}
	
	function post_type_supports_tags( $post_type ) {
		if ( in_array( 'post_tag', get_object_taxonomies( $post_type ) ) ) {
			return true;
		}
		
		// the featured content module adds post_tag support
		// to the post types that are registered for it
		// however it does so in a way that isn't available
		// to get_object_taxonomies
		$featured_content = get_theme_support( 'featured-content' );
		if ( ! $featured_content || empty( $featured_content[0] ) || empty( $featured_content[0]['post_types'] ) ) {
			return false;
		}
		
		return in_array( $post_type, $featured_content[0]['post_types'] );
	}
}