<?php

namespace Box\Spout\Reader;

use Box\Spout\Common\Exception\UnsupportedTypeException;
use Box\Spout\Common\Helper\GlobalFunctionsHelper;
use Box\Spout\Common\Type;

/**
 * Class ReaderFactory
 * This factory is used to create readers, based on the type of the file to be read.
 * It supports CSV and XLSX formats.
 *
 * @package Box\Spout\Reader
 */
class ReaderFactory {

	/**
	 * This creates an instance of the appropriate reader, given the type of the file to be read
	 *
	 * @api
	 * @param  string $readerType Type of the reader to instantiate
	 * @return ReaderInterface
	 * @throws \Box\Spout\Common\Exception\UnsupportedTypeException
	 */
	public static function create( $readerType ) {
		$reader = null;

		switch ( $readerType ) {
			case Type::CSV:
				$reader = new CSV\Reader();
				break;
			case Type::XLSX:
				$reader = new XLSX\Reader();
				break;
			case Type::ODS:
				$reader = new ODS\Reader();
				break;
			default:
				throw new UnsupportedTypeException( 'No readers supporting the given type: ' . $readerType );
		}

		$reader->setGlobalFunctionsHelper( new GlobalFunctionsHelper() );

		return $reader;
	}
}