<?php
/*
 * $RCSfile: module.inc,v $
 *
 * Gallery - a web based photo album viewer and editor
 * Copyright (C) 2000-2005 Bharat Mediratta
 *
 * 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 2 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, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */
/**
 * @version $Revision: 1.24 $ $Date: 2005/02/24 11:26:11 $
 * @package Cart
 * @author Bharat Mediratta <bharat@menalto.com>
 */

/**
 * The implementation of the cart module
 *
 * @package Cart
 */
class CartModule extends GalleryModule /* and GalleryEventListener */ {

    function CartModule() {
	global $gallery;

	$this->setId('cart');
	$this->setName('Cart');
	$this->setDescription($gallery->i18n('Shopping Cart Module'));
	$this->setVersion('0.8.9');
	$this->setGroup('commerce', $this->translate('Commerce'));
	$this->setCallbacks('getItemLinks|loadSystemContent');
	$this->setRequiredCoreApi(array(4, 0));
	$this->setRequiredModuleApi(array(0, 9));
    }

    /**
     * @see GalleryModule::upgrade()
     */
    function upgrade($currentVersion) {
	global $gallery;

	switch ($currentVersion) {
	case '0.8':
	case '0.8.1':
	case '0.8.2':
	case '0.8.3':
	case '0.8.4':
	case '0.8.5':
	case '0.8.6':
	case '0.8.7':
	case '0.8.8':
	    $storage =& $gallery->getStorage();
	    $query = '
	    DROP TABLE [CartMap]
	    ';
	    $ret = $storage->execute($query);
	    if ($ret->isError()) {
		return $ret->wrap(__FILE__, __LINE__);
	    }
	    $query = '
	    DELETE FROM [Schema]
	    WHERE [Schema::name] = \'CartMap\'
	    ';
	    $ret = $storage->execute($query);
	    if ($ret->isError()) {
		return $ret->wrap(__FILE__, __LINE__);
	    }
	}

	return GalleryStatus::success();
    }

    /**
     * @see GalleryModule::isRecommendedDuringInstall
     */
    function isRecommendedDuringInstall() {
	return true;
    }

    /**
     * @see GalleryModule::autoConfigure
     */
    function autoConfigure() {
	/* We don't require any special configuration */
	return array(GalleryStatus::success(), true);
    }

    /**
     * @see GalleryModule::getItemLinks()
     */
    function getItemLinks($items) {
	$links = array();
	foreach ($items as $item) {
	    $itemTypeNames = $item->itemTypeName();
	    $links[$item->getId()][] =
		array('text' => $this->translate(array('text' => 'add %s to cart',
						       'arg1' => $itemTypeNames[1])),
		      'params' => array('controller' => 'cart:AddToCart',
					'itemId' => $item->getId(),
					'return' => true));
	}

	return array(GalleryStatus::success(), $links);
    }

    /**
     * @see GalleryModule::loadSystemContent
     */
    function loadSystemContent(&$template) {
	$content = array();

	$view = GalleryUtilities::getRequestVariables('view');
	if ($view == 'cart:ViewCart') {
	    return array(GalleryStatus::success(), array());
	}

	/* The "View Cart" link */
	$links = array();
	$links[] = array('text' => $this->translate('View Cart'),
			 'params' => array('view' => 'cart:ViewCart',
					   'return' => true));
	$CartSystemContent['links'] = $links;

	/* The cart content's count */
	GalleryCoreApi::requireOnce(dirname(__FILE__) . '/classes/CartHelper.class');
	list ($ret, $cartItemIds) = CartHelper::fetchCartItemCounts();
	if ($ret->isError()) {
	    return array($ret->wrap(__FILE__, __LINE__), null);
	}
	$CartSystemContent['count'] = 0;
	foreach ($cartItemIds as $itemId => $count) {
	    $CartSystemContent['count'] += $count;
	}

	$template->setVariable('CartSystemContent', $CartSystemContent);
	$content = array('cart' => 'modules/cart/templates/CartSystemContent.tpl');
	return array(GalleryStatus::success(), $content);
    }
}
?>