<?php
namespace util;

// TODO audit places throughout the repo where I need to dereference objects
// (this is anywhere I access a field on an object, basically)

function dereference_object( $object ) {
    if ( is_array( $object ) ) {
        return $object;
    } else if ( filter_var( $object, FILTER_VALIDATE_URL ) ) {
        $response = wp_remote_get( $object );
        if ( is_wp_error( $response ) ) {
            return $response;
        }
        $body = wp_remote_retrieve_body( $response );
        if ( empty( $body ) ) {
            return new \WP_Error(
                'not_found',
                __( 'The object did not dereference to a valid object', 'pterotype' ),
                array( 'status' => 404 )
            );
        }
        $body_array = json_decode( $body, true );
        return $body_array;
    } else {
        return new \WP_Error(
            'invalid_object',
            __( 'Not a valid ActivityPub object or reference', 'pterotype' ),
            array( 'status' => 400 )
        );
    }
}

function is_same_object( $object1, $object2 ) {
    return get_id( $object1 ) === get_id( $object2 );
}

function get_id( $object ) {
    if ( is_array( $object ) ) {
        return array_key_exists( 'id', $object ) ?
            $object['id'] :
            null;
    } else {
        return $object;
    }
}
?>