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<?php

namespace WPGMZA;

/**
 * This class facilitates all communication between the client and any server side modules which can be interacted with through the WordPress REST API.
 */
class RestAPI
{
    /**
     * @const The plugins REST API namespace
     */
    const NS = 'wpgmza/v1';
    
    /**
     * Constructor
     */
    public function __construct()
    {
        add_action('wp_enqueue_scripts', array($this, 'onEnqueueScripts'));
        add_action('admin_enqueue_scripts', array($this, 'onEnqueueScripts'));
        add_action('enqueue_block_assets', array($this, 'onEnqueueScripts'));
        
        add_action('rest_api_init', array($this, 'onRestAPIInit'));
    }
    
    /**
     * Enqueues the wp-api script, required to use the Rest API client side.
     * @return void
     */
    public function onEnqueueScripts()
    {
        wp_enqueue_script('wp-api');
    }
    
    /**
     * Callback for the rest_api_init action, this function registers the plugins REST API routes.
     * @return void
     */
    public function onRestAPIInit()
    {
        register_rest_route(RestAPI::NS, '/markers(\/\d+)?/', array(
            'methods' => 'GET',
            'callback' => array($this, 'markers')
        ));
    }
    
    /**
     * Callback for the /markers REST API route.
     * @param \WP_REST_Request The REST request.
     * @return mixed Where an ID is specified on the URL, a single marker is returned. Where no ID is specified, an array of all markers are returned.
     */
    public function markers($request)
    {
        global $wpdb;
        global $wpgmza_tblname;
        
        $route = $request->get_route();
        
        if(preg_match('#/wpgmza/v1/markers/(\d+)#', $route, $m))
        {
            $marker = new Marker($m[1]);
            return $marker;
        }
        
        $results = $wpdb->get_results("SELECT * FROM $wpgmza_tblname");
        
        // TODO: Select all custom field data too, in one query, and add that to the marker data in the following loop. Ideally we could add a bulk get function to the CRUD classes which takes IDs?
        
        foreach($results as $obj)
            unset($obj->latlng);
        
        return $results;
    }
}