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<?php
require_once("inc/messages.inc");
define("SAVEDIR", "data/save");
function genXML($table, $xml) {
foreach($table as $k => $v) {
if(is_object($v)) { // Object: either Item or Inventory
if(is_callable(array($v, "addToXML"))) // Check if the object has a addToXML method
$v->addToXML($xml->addChild($k));
} elseif(is_array($v)) // Nested array
genXML($v, $xml->addChild($k));
else // Single value (numeric or string)
$xml->addChild($k, $v);
}
}
function genSave() {
$save = new SimpleXMLElement("<save/>");
genXML($_SESSION, $save);
return $save;
}
function genFilename() {
return "craftmine-".date("d-m-Y_H-i-s").".save.xml";
}
function saveGame() {
$save = genSave();
if($save->asXML(SAVEDIR."/".genFilename())) sendInfo("gamesave_ok");
else sendError("gamesave_error");
}
function downSave() {
$save = "";
$filename = "";
if(empty($_GET["filename"])) {
$filename = genFilename();
$save = genSave()->asXML(); // Send current game save file if no file specified
} else {
$filename = $_GET["filename"];
$save = file_get_contents(SAVEDIR . "/" . $filename);
if(empty($save)) return; // Probably file not found
}
header("Content-Type: application/xml"); // Force browser to intepret the file as XML
header("Content-Disposition: attachment; filename=".$filename); // Force download with specific filename
header("Cache-Control: no-cache"); // Avoid storing save file in proxy/browser cache
echo $save;
}
function listSaves() {
chdir(SAVEDIR); // Go to SAVEDIR folder, avoiding leading folder name in file list
echo json_encode(glob("*.save.xml"));
}
function parseSave($xml, &$table) { // Passing $table by reference
foreach($xml as $k => $v) {
if($v->count() == 0) { // No child, treat as string
$v = (string)$v;
if(is_numeric($v)) $v = +$v; // If it is in fact a number, treat it that way using PHP unary '+' coercion
$table[$k] = $v;
} elseif($k == "inventory") { // Special case for inventory: objects need to be created
foreach($v as $item) Inventory::addItem(Item::fromXML($item));
} else { // If nested array
$table[$k] = array();
parseSave($v, $table[$k]);
} // Other types unsupported (unused)
}
}
function deleteSave() {
if(empty($_POST["filename"])) return;
$filename = $_POST["filename"];
if(rm_file(SAVEDIR + "/" + $filename)) sendError("gamesave_delete_failed"); // TODO: find the correct method for removing a file…
else sendInfo("gamesave_delete_success");
}
function loadSave() {
if(empty($_POST["filename"])) return;
$xml = simplexml_load_file(SAVEDIR . "/" . $_POST["filename"]);
if(empty($xml)) {
sendError("gamesave_not_found");
return;
}
$_SESSION = array(); // drop current game
parseSave($xml, $_SESSION);
}
?>
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