<?php
/*                                                                              
    Couffin - A simple PHP shopping basket.                                    
                                                                              
    Copyright 2005 by Georges Auberger                                            
	http://www.auberger.com/couffin
                                                                                                                                                           
    Couffin 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.                                       
                                                                              
    Couffin 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, you can find it here:                    
    http://www.gnu.org/copyleft/gpl.html                                      
*/

// Line item present in the cart
class item {
    var $id;
    var $name;
    var $qty = 0;
    var $price = 0.0;
    var $weight = 0;
	var $url;

    function extendedPrice() {
        return ($this->qty * $this->price);
    }
}

// Main class containing items
class cart {
    var $items = array();
		
    function getNbLineItems() {
        return count($this->items);
    }

	function getTotalWeight() {
		$totalWeight=0;
        foreach ($this->items as $id => $item) {			
            $totalWeight = $totalWeight + ($item->qty * $item->weight);
        }
		return $totalWeight;		
	}

    function getTotalItems() {
        $totalItems=0;
        foreach ($this->items as $id => $item) {
            $totalItems = $totalItems + $item->qty;
        }
        return $totalItems;
    }

    function getTotalPrice() {
        $totalPrice=0;
        foreach ($this->items as $id => $item) {
			$totalPrice = $totalPrice + $item->extendedPrice();
        }
        return $totalPrice;
    }
    
    function isEmpty() {
        return ($this->getNbLineItems()==0);
    }
    
    function getItemQty($id) {
        return $this->items[$id]->qty;
    }
    
    function setItemQty($id, $qty) {
		if ($qty == 0) {
			$this->removeItem($id);
		} else {
			$this->items[$id]->qty = $qty;
		}
    }
    
    function addItem($id, $name, $qty, $price, $weight, $url) {
        // If item exists, simply add more to it
        if ($this->getItemQty($id) > 0) {
            $this->setItemQty($id, $this->getItemQty($id) + $qty);
        }
        else {
			$this->items[$id] = new item();
            $this->items[$id]->name = $name;
            $this->items[$id]->qty = $qty;
            $this->items[$id]->price = $price;
            $this->items[$id]->weight = $weight;
            $this->items[$id]->url = $url;
        }
    }
    
    function removeItem($id) {
        if (!$this->isEmpty())  {
            $tmp=array();
			foreach ($this->items as $idList => $item) {
                if ($idList != $id) {
                    $tmp[$idList] = $item;
                }
            };
            $this->items=$tmp;
        };
    }
	
	function removeAll() {
		$this->items=array();
	}
}
?>