[common] add GameProgress

src/common/haxe/ru/m/tankz/game/GameProgress.hx

@@ -0,0 +1,22 @@
+package ru.m.tankz.game;
+
+import ru.m.tankz.Type.GameType;
+
+class GameProgress {
+
+    public var type(default, null):GameType;
+    private var completed(default, null):Map<Int, Bool>;
+
+    public function new(type:GameType) {
+        this.type = type;
+        this.completed = new Map();
+    }
+
+    public function isLevelAvailable(level:Int):Bool {
+        return level == 0 || completed.get(level - 1);
+    }
+
+    public function completeLevel(level:Int):Void {
+        completed.set(level, true);
+    }
+}