<?php

namespace Mediawiki\Api\Service;

use GuzzleHttp\Promise\PromiseInterface;
use Mediawiki\Api\SimpleRequest;
use Mediawiki\DataModel\PageIdentifier;

/**
 * @access private
 *
 * @author Addshore
 */
class Parser extends Service {

	/**
	 * @param PageIdentifier $pageIdentifier
	 *
	 * @return array the parse result (raw from the api)
	 */
	public function parsePage( PageIdentifier $pageIdentifier ) {
		return $this->parsePageAsync( $pageIdentifier )->wait();
	}

	/**
	 * @param PageIdentifier $pageIdentifier
	 *
	 * @return PromiseInterface of array the parse result (raw from the api)
	 */
	public function parsePageAsync( PageIdentifier $pageIdentifier ) {
		$params = [];
		if ( $pageIdentifier->getId() !== null ) {
			$params['pageid'] = $pageIdentifier->getId();
		} elseif ( $pageIdentifier->getTitle() !== null ) {
			$params['page'] = $pageIdentifier->getTitle()->getText();
		} else {
			throw new \RuntimeException( 'No way to identify page' );
		}

		$promise = $this->api->getRequestAsync( new SimpleRequest( 'parse', $params ) );

		return $promise->then( function ( $result ) {
			return $result['parse'];
		} );
	}

}