<?php

new WPCOM_JSON_API_List_Post_Types_Endpoint( array (
	'description' => 'Get a list of post types available for a site.',
	'group'       => 'sites',
	'stat'        => 'sites:X:post-types',

	'method'      => 'GET',
	'path'        => '/sites/%s/post-types',
	'path_labels' => array(
		'$site' => '(int|string) Site ID or domain',
	),

	'query_parameters' => array(
		'api_queryable' => '(bool) If true, only queryable post types are returned',
	),

	'response_format' => array(
		'found'      => '(int) The number of post types found',
		'post_types' => '(array) A list of available post types',
	),
	'example_request' => 'https://public-api.wordpress.com/rest/v1.1/sites/33534099/post-types'
) );

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',
		'hierarchical' => 'hierarchical',
		'public'       => 'public',
		'show_ui'      => 'show_ui',
		'publicly_queryable' => 'publicly_queryable',
	);

	// /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();

		/**
		 * Whether API responses should be returned in a custom locale.  False
		 * for Jetpack; may be true for WP.com requests.
		 *
		 * @since 3.9.2
		 */
		if ( apply_filters( 'rest_api_localize_response', false ) ) {
			// API localization occurs after the initial post types have been
			// registered, so re-register if localizing response
			create_initial_post_types();
		}

		// Get a list of available post types
		$post_types = get_post_types();
		$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 ( ! $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;
		}

		if ( is_array( $featured_content[0]['post_types'] ) ) {
			return in_array( $post_type, $featured_content[0]['post_types'] );
		}
		return $post_type === $featured_content[0]['post_types'];
	}
}
