<?php

class Inventory {

	public $items = array();

	public static function created() {
		return !empty($_SESSION["inventory"]);
	}

	public static function sendContent() {
		return self::get()->items;
	}

	public static function get() {
		if(!self::created()) {
			$_SESSION["inventory"] = new Inventory();
		}
		return $_SESSION["inventory"];
	}

	private function _addItem($item) {
		foreach($this->items as $k => $object){
			if($object[0] == $item){
				$this->items[$k][1]++;
				return $this->items[$k];
			}
		}
		$tab = array($item,1);
		$this->items[] = $tab;
		return $tab;
	}

	public static function addItem($item) {
		$inv = self::get();
		$tab = $inv->_addItem($item);
		return $tab;
	}

	private function _removeItem($item) {
		unset($this->items[array_search($item, $this->items)]);
	}

	public static function removeItem($item) {
		$inv = self::get();
		$inv->_removeItem($item);
	}

	private function _useItem($item) {
		foreach($this->items as $k => $object){
			if($object[0] == $item){
				if($this->items[$k][1]>0)$this->items[$k][1]--;
				//if($this->items[$k][1] == 0) _removeItem($item);
				return $this->items[$k];
			}
		}
		return false;
	}

	public static function useItem($item) {
		$inv = self::get();
		$it = $inv->_useItem($item);
		return $it;
	}

	public function addToXML($root) {
		foreach($this->items as $item)
			$item->addToXML($root);
	}
}

?>