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<?php
/**
* Manages the shop.
*
* @author Alexandre Renoux
* @author Pierre-Emmanuel Novac
*/
require_once("messages.inc");
require_once("account.inc");
require_once("Item.inc");
require_once("Inventory.inc");
require_once("perso.inc");
/**
* Loads all the shop's items from the XML file data/items.xml.
*
* @return array contains all the Item objects
*/
function loadShop(){
$items = simplexml_load_file('data/items.xml'); //TODO: handle errors
$shop = array("cost"=>(string)$items["cost"],"items"=>array()); //TODO: cost is a string?
foreach($items as $cat){ // Loop over all categories
$category = (string)$cat["name"];
$shop["items"][$category] = array();
foreach($cat as $item){ // Loop over all items inside a category
$feats = array();
foreach($item->features[0] as $k => $v) // Reads features
$feats[(string)$k] = (string)$v;
$shop["items"][$category][] = new Item(
(string)$item->name,
intval($item->cost), //Note: cost is an int here.
(string)$item->icon,
(string)$item->description,
$feats);
}
}
return $shop;
}
/**
* Gets an Item object from the shop from its name.
*
* @params string $name the name of the object to search for
* @return Item|false the Item object or false if the item was not found
*/
function getItem($name) {
$shop=loadShop();
foreach($shop["items"] as $cat) {
foreach($cat as $item){
if($name == $item->name) {
return $item;
}
}
}
sendError("shop_missing_item");
return false;
}
/**
* Marks the shop as created in the session.
*
* @return void
*/
function initShop() {
$_SESSION["shop"] = true;
}
/**
* Returns the shop array if it was created.
*
* @return array shop array as created by loadShop
*/
function sendShop() {
if(!empty($_SESSION["shop"]))
return loadShop();
else return false;
}
/**
* Creates the shop in the session and sends it to the client.
* Debits the shop's cost from the player's gold.
*
* @return void
*/
function buildShop() {
$shop=loadShop();
if(!empty($_SESSION["shop"])) {
sendError("shop_already_built");
}
elseif(debitAccount($shop["cost"])) {
initShop();
echo json_encode($shop);
}
}
/**
* Debits the item's cost specified as the item POST parameter, adds it to the Inventory and sends it to the client.
*
* @return void
*/
function buyItem() {
$item = getItem($_POST["item"]);
if($item && debitAccount($item->cost)) {
$tab = Inventory::addItem($item);
echo json_encode($tab); // Sends an array with the Item as first member and count as second.
}
}
/**
* Invoke useItem on an item passed as the item POST parameter, sends to the client the updated player stats and the item.
*
* @return void
*/
function useItem(){
$item = getItem($_POST["item"]);
$it = Inventory::useItem($item);
echo json_encode(array("perso" => sendPerso(), "item" => $it));
}
?>
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