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<?php
require_once("perso.inc");
/**
* Represent the player's Inventory.
* Implemented as a singleton in the session.
*
* @package inc\Inventory.inc
* @author Alexandre Renoux
* @author Pierre-Emmanuel Novac
*/
class Inventory {
/**
* @var array Arrays of array with Item object and Item's count as int
*/
public $items = array();
/**
* Checks if the Inventory was already created in the session
*
* @return boolean true if Inventory was already created, false otherwise
*/
public static function created() {
return !empty($_SESSION["inventory"]);
}
/**
* Returns the Inventory's content from the session.
*
* @return array array of Items and number
*/
public static function sendContent() {
return self::get()->items;
}
/**
* Returns the Inventory from the session.
* Implements the singleton pattern.
*
* @return Inventory the Inventory object
*/
public static function get() {
if(!self::created()) {
$_SESSION["inventory"] = new Inventory();
}
return $_SESSION["inventory"];
}
/**
* Adds an Item object to the Inventory, incrementing the Item's count if it was already present.
*
* @param Item $item Item to add to the Inventory
* @return array Item and Item's count
*/
private function _addItem($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;
}
/**
* Adds an Item object to the singleton's Inventory from session.
*
* @param Item $item Item to add to the Inventory
* @return array Item and Item's count
*/
public static function addItem($item) {
$inv = self::get();
$tab = $inv->_addItem($item);
return $tab;
}
/**
* Removes an Item object from the Inventory, not taking into account the Item's count.
*
* @param Item $item Item to remove from the Inventory
* @return void
*/
private function _removeItem($item) {
foreach($this->items as $k => $object) {
if($object[0] == $item) {
unset($this->items[$k]);
return;
}
}
}
/**
* Removes an Item object to the singleton's Inventory from session, not taking into account the Item's count.
*
* @param Item $item Item to remove from the Inventory
* @return void
*/
public static function removeItem($item) {
$inv = self::get();
$inv->_removeItem($item);
}
/**
* Consumes an Item object from the Inventory, decrementing the Item's count and removing it if count reaches 0.
*
* @param Item $item Item to consume from the Inventory
* @return array|false Item and updated Item's count, false if it was not found
*/
private function _useItem($item) {
foreach($this->items as $k => $object){
if($object[0] == $item) {
$nb = $this->items[$k][1];
if(limitUse($this->items[$k][0])){
if($nb > 0) {
$this->items[$k][0]->consume();
$this->items[$k][1]--;
}
if($nb-1 <= 0) $this->_removeItem($item);
return array($object[0], $nb-1);
}
}
}
return false;
}
/**
* Consumes an Item object to the singleton's Inventory from session, decrementing the Item's count and removing it if count reaches 0.
*
* @param Item $item Item to consume from the Inventory
* @return array|false Item and updated Item's count, false if it was not found
*/
public static function useItem($item) {
$inv = self::get();
$it = $inv->_useItem($item);
return $it;
}
/**
* Generates an XML tree describing the Inventory
*
* @param SimpleXMLElement $root root XML element to add the Inventory's Items to
* @return void
*/
public function addToXML($root) {
foreach($this->items as $item)
$item[0]->addToXML($root, $item[1]);
}
}
?>
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