<?php
/**
 * Provides the OfferItem class, an interface to database tables related to
 * offers
 *
 * @author Camil Staps
 *
 * BusinessAdmin: administrative software for small companies
 * Copyright (C) 2015 Camil Staps (ViviSoft)
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

/**
 * An abstract interface to a database table related to offers
 */
abstract class OfferItem extends Model implements Calculatable {
	/**
	 * Get the offer that this assignment is linked to
	 *
	 * @return offer                The offer
	 */
	public function getOffer() {
		return new Offer($this->pdo, $this->offerId);
	}

	/**
	 * The description after having parsed markdown
	 *
	 * @return string               The description in HTML format
	 */
	public function getHTMLDescription() {
		$pd = new Parsedown;
		return $pd->text($this->description);
	}

	/** {@inheritDoc} */
	public function calculateVAT() {
		return $this->calculateSubtotal() * $this->VAT_percentage / 100;
	}
}