1 files changed, 117 insertions, 0 deletions
diff --git a/inc/savegame.inc b/inc/savegame.inc
new file mode 100644
index 0000000..6d92af2
--- /dev/null
+++ b/inc/savegame.inc
@@ -0,0 +1,117 @@
+<?php
+
+require_once("inc/messages.inc");
+require_once("inc/Inventory.inc");
+require_once("inc/Item.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 $item) {
+				for($i=0; $i<+$item->count; $i++) // Add the right count of items to Inventory
+					Inventory::addItem(Item::fromXML($item));
+			}
+		} else { // If nested array
+			$table[$k] = array();
+			parseSave($v, $table[$k]);
+		} // Other types unsupported (unused)
+	}
+}
+
+function deleteSave() {
+	if(empty($_POST["filename"])) return;
+	$path = SAVEDIR . "/" . basename($_POST["filename"]); // remove any leading directory
+	if(file_exists($path) && unlink($path))
+		sendInfo("gamesave_delete_success");
+	else sendError("gamesave_delete_fail");
+}
+
+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);
+}
+
+function uploadSave() {
+	$fname = basename($_FILES['savefile']['name']);
+	$src = $_FILES['savefile']['tmp_name'];
+
+	libxml_use_internal_errors(true); // Ignore errors when loading the received file
+	$xml = simplexml_load_file($src);
+	libxml_use_internal_errors(false);
+	if(!$xml) {
+		sendError("upload_fail");
+		return;
+	}
+	$table = array();
+	parseSave($xml, $table); // Parse received file
+
+	$save = new SimpleXMLElement("<save/>");
+	genXML($table, $save); // Regenerate it
+	if($save->asXML(SAVEDIR."/".$fname)) sendInfo("upload_success", array($fname));
+	else sendError("upload_error");
+}
+?>