<?php
/**
 * Simple AJAX stub: Shop Cart
 *
 *
 * $Id$
 *
 * @author gERD Schaufelberger <gerd@php-tools.net>
 * @license PHP License
 * @package WB
 * @subpackage base
 */

WBClass::load('WBAjax');

/**
 * Simple AJAX stub: Shop Cart
 *
 *
 *
 * @version 0.1.0
 * @package WB
 * @subpackage base
 */
class WBAjax_Shop_Cart extends WBAjax
{
    /**
     * cart
     * @var WBShop_Cart
     */
    private $cart;

    /**
     * second construcotr
     *
     * Called by constructer of super class.
     *
     * @see include/WB/WBAjax#init()
     */
    protected function init()
    {
        $this->cart =   WBClass::create('WBShop_Cart');
        $this->cart->setUser($this->user->getId());
        $this->cart->loadActive();
    }

    /**
     * Display Gauge
     *
     * Show currently active cart
     *
     * @return string comment list HTML
     */
    protected function display()
    {
        return $this->getGaugeHtml();
    }

    /**
     * add item to cart
     *
     * @see WBShop_Cart::add()
     * @return string comment list HTML
     */
    protected function add()
    {
        $this->prepare4AddSet($item, $quantity, $comment, $atts);

        // no changes
        if (empty($item)) {
            return $this->getGaugeHtml();
        }

        foreach ($item as  $i => $a) {
            $q  =   1;
            if (isset($quantity[$i])) {
                $q  =   intval($quantity[$i]);
            }
            $c  =   '';
            if (isset($comment[$i])) {
                $c  =   $comment[$i];
            }
            $this->cart->add($a, $q, $c);
            $this->cart->setItemAttributes($a, $atts[$i]);
        }
        $this->cart->save();

        return $this->getGaugeHtml();
    }

    /**
     * Set item in cart
     *
     * @see WBShop_Cart::set()
     * @return string comment list HTML
     */
    protected function set()
    {
        $this->prepare4AddSet($item, $quantity, $comment, $atts);

        // no changes
        if (empty($item)) {
            return $this->getGaugeHtml();
        }

        foreach ($item as  $i => $a) {
            $q  =   1;
            if (isset($quantity[$i])) {
                $q  =   intval($quantity[$i]);
            }
            $c  =   '';
            if (isset($comment[$i])) {
                $c  =   $comment[$i];
            }
            $this->cart->set($a, $q, $c);
            $this->cart->setItemAttributes($a, $atts[$i]);
        }
        $this->cart->save();

        return $this->getGaugeHtml();
    }

    /**
     * Prepare request variables
     *
     * @param array $item
     * @param array $quantity
     * @param array $comment
     * @param array $atts
     */
    private function prepare4AddSet(&$item, &$quantity, &$comment, &$atts)
    {
        $this->cart->setNamespace($this->req->get('namespace', ''));
        $item       =   $this->req->get('item', '');
        $quantity   =   $this->req->get('quantity', 1);
        $comment    =   $this->req->get('comment', '');

        // normalize
        if (!is_array($item)) {
            $item   =   array($item);
        }
        if (!is_array($quantity)) {
            $quantity   =   array($quantity);
        }
        if (!is_array($comment)) {
            $comment   =   array($comment);
        }

        // extract attributes
        $expo   =   $this->req->export();
        foreach (array('namespace', 'item', 'quantity', 'comment') as $i) {
            if (isset($expo[$i])) {
                unset($expo[$i]);
            }
        }

        // normalize attributes
        $atts   =   array();
        for ($i = 0; $i < count($item); ++$i) {
            $a  =   array();
            foreach ($expo as $k => $v) {
                if (!is_array($v)) {
                    $a[$k]  =   $v;
                    continue;
                }

                if (isset($v[$i])) {
                    $a[$k]  =   $v[$i];
                    continue;
                }
                $a[$k]  =   '';
            }
            $atts[] =   $a;
        }
    }

    /**
     * remove item from cart
     *
     * @see WBShop_Cart::remove()
     * @return string comment list HTML
     */
    protected function remove()
    {
        $this->cart->setNamespace($this->req->get('namespace', ''));
        $item       =   $this->req->get('item', '');

        // no changes
        if (empty($item)) {
            return $this->getGaugeHtml();
        }

        if (!is_array($item)) {
            $item   =   array($item);
        }
        foreach ($item as $i) {
            $this->cart->remove($i);
        }
        $this->cart->save();

        return $this->getGaugeHtml();
    }

    /**
     * Rendert cart gauge
     *
     * Load template, add cart information and render HTML
     *
     * @return string html snippet
     */
    private function getGaugeHtml()
    {
        $tmpl       =   $this->req->get('tmpl', '');
        if (empty($tmpl)) {
            $tmpl   =   'display';
        } else {
            $tmpl   =   'display/' . $tmpl;
        }

        $this->loadTemplates($tmpl);
        if ($this->tmpl->exists('item_entry')) {
            $this->tmpl->addRows('item_entry', $this->cart->getItems());
        }
        $this->tmpl->addGlobalVars($this->cart->get());

        return $this->tmpl->getParsedTemplate('snippet');
    }
}