<?php
/**
* Class dCart
* Description Shopping Cart System
* @author Dhiman Chakraborty
* @date May 30, 2013
*/
class dCart{
protected static $instance;
protected $items;
protected $sessionIndex;
public function dCart(){
$this->items = array();
$this->writeSession();
return $this;
}
public static function getInstance($sessionIndex = 'cart'){
self::startSession();
if(!isset($_SESSION[$sessionIndex])){
$_SESSION[$sessionIndex] = new self;
}
return $_SESSION[$sessionIndex];
}
public static function startSession(){
if(session_id() == '') {
session_start();
}
}
protected function writeSession(){
$_SESSION[$this->sessionIndex] = $this->items;
}
public function Add($newOrder = array()){
$itemFound = false;
foreach($this->items as $key=>$item){
if(($item['id'] == $newOrder['id']) && array_key_exists('quantity',$this->items[$key]) && array_key_exists('quantity',$newOrder)){
$this->items[$key]['quantity'] += $newOrder['quantity'];
$itemFound = true;
}
}
if(!$itemFound){
array_push($this->items,$newOrder);
}
$this->writeSession();
return $this;
}
public function Remove($key = NULL){
if(func_num_args() != 0){
unset($this->items[$key]);
sort($this->items);
}else{
$this->items = array();
}
$this->writeSession();
return $this;
}
public function Edit($key = NULL,$index = NULL, $value = array()){
if(array_key_exists($key,$this->items) && array_key_exists($index,$this->items[$key])){
$this->items[$key][$index] = $value;
}
$this->writeSession();
return $this;
}
public function Show(){
echo "<pre>";
print_r($this->items);
echo "</pre>";
return $this;
}
public function GetAll(){
return $this->items;
}
}
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