feat: tiles.state

packages/topdown/tiles.js

@@ -1,3 +1,5 @@
+import * as I from 'immutable';
+
 import {compose} from '@avocado/core';
 import {Rectangle, Vector} from '@avocado/math';
 
@@ -9,6 +11,20 @@ const decorate = compose(
 
 class TilesBase {
 
+  constructor() {
+    this._sizeState = I.List();
+    this._state = I.Map();
+  }
+
+  acceptStateChange(change) {
+    if (change.size) {
+      this.size = change.size;
+    }
+    if (change.data) {
+      this.data = change.data;
+    }
+  }
+
   fromJSON(json) {
     if (json.size) {
       this.size = json.size;
@@ -59,6 +75,17 @@ class TilesBase {
     return slice;
   }
 
+  get state() {
+    return this._state;
+  }
+
+  tick(elapsed) {
+    this._sizeState = this._sizeState.set(0, this.width);
+    this._sizeState = this._sizeState.set(1, this.height);
+    this._state = this._state.set('size', this._sizeState);
+    this._state = this._state.set('data', this.data);
+  }
+
   tileAt(x, y) {
     return this.data[y * this.width + x];
   }