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package client;
import haxe.Json;
import js.Browser;
import js.html.Storage;
private typedef Vers = {version:Int};
private typedef Updater = (data:Any, version:Int) -> Any;
class Settings {
static var defaults:Null<Vers>;
static var updater:Null<Updater>;
static var storage:Storage;
static var isSupported = false;
public static function init(def:Vers, ?upd:Updater):Void {
storage = Browser.getLocalStorage();
isSupported = storage != null;
defaults = def;
updater = upd;
}
public static function read():Any {
if (!isSupported) return defaults;
final data:Any = Json.parse(storage.getItem("data"));
return checkData(data);
}
static function checkData(data:Vers):Any {
if (defaults == null) throw "read: default data is null";
if (data == null) return defaults;
if (data.version == defaults.version) return data;
if (data.version > defaults.version)
throw "read: current data version is larger than default data version";
if (updater == null) throw "read: updater function is null";
while (data.version < defaults.version) {
data = updater(data, data.version);
data.version++;
}
write(data);
return data;
}
public static function set(sets:Any):Void {
final data = read();
final fields = Reflect.fields(sets);
for (field in fields) {
final value = Reflect.field(sets, field);
Reflect.setField(data, field, value);
}
write(data);
}
public static function write(data:Vers):Void {
if (!isSupported) return;
storage.setItem("data", Json.stringify(data));
}
public static function reset():Void {
if (defaults == null) throw "reset: default data is null";
write(defaults);
}
}
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