From 8910bf0dbd0d313ed65c115185f0d4e922735d02 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?D=C3=A1vid=20Szab=C3=B3?= <david.szabo97@gmail.com>
Date: Fri, 26 Aug 2016 01:43:14 +0200
Subject: [PATCH] Add model version 2 backward compatiblity

---
 .../serialization/backward/Deserializer_v2.js | 78 +++++++++++++++++++
 src/piskel-script-list.js                     |  1 +
 2 files changed, 79 insertions(+)
 create mode 100644 src/js/utils/serialization/backward/Deserializer_v2.js

diff --git a/src/js/utils/serialization/backward/Deserializer_v2.js b/src/js/utils/serialization/backward/Deserializer_v2.js
new file mode 100644
index 00000000..185354e2
--- /dev/null
+++ b/src/js/utils/serialization/backward/Deserializer_v2.js
@@ -0,0 +1,78 @@
+(function () {
+  var ns = $.namespace('pskl.utils.serialization.backward');
+
+  ns.Deserializer_v2 = function (data, callback) {
+    this.layersToLoad_ = 0;
+    this.data_ = data;
+    this.callback_ = callback;
+    this.piskel_ = null;
+    this.layers_ = [];
+  };
+
+  ns.Deserializer_v2.prototype.deserialize = function (name) {
+    var data = this.data_;
+    var piskelData = data.piskel;
+    name = name || 'Deserialized piskel';
+
+    var descriptor = new pskl.model.piskel.Descriptor(name, '');
+    this.piskel_ = new pskl.model.Piskel(piskelData.width, piskelData.height, descriptor);
+
+    this.layersToLoad_ = piskelData.layers.length;
+    if (piskelData.expanded) {
+      piskelData.layers.forEach(this.loadExpandedLayer.bind(this));
+    } else {
+      piskelData.layers.forEach(this.deserializeLayer.bind(this));
+    }
+  };
+
+  ns.Deserializer_v2.prototype.deserializeLayer = function (layerString, index) {
+    var layerData = JSON.parse(layerString);
+    var layer = new pskl.model.Layer(layerData.name);
+    layer.setOpacity(layerData.opacity);
+
+    // 1 - create an image to load the base64PNG representing the layer
+    var base64PNG = layerData.base64PNG;
+    var image = new Image();
+
+    // 2 - attach the onload callback that will be triggered asynchronously
+    image.onload = function () {
+      // 5 - extract the frames from the loaded image
+      var frames = pskl.utils.LayerUtils.createFramesFromSpritesheet(image, layerData.frameCount);
+      // 6 - add each image to the layer
+      this.addFramesToLayer(frames, layer, index);
+    }.bind(this);
+
+    // 3 - set the source of the image
+    image.src = base64PNG;
+    return layer;
+  };
+
+  ns.Deserializer_v2.prototype.loadExpandedLayer = function (layerData, index) {
+    var width = this.piskel_.getWidth();
+    var height = this.piskel_.getHeight();
+    var layer = new pskl.model.Layer(layerData.name);
+    layer.setOpacity(layerData.opacity);
+    var frames = layerData.grids.map(function (grid) {
+      return pskl.model.Frame.fromPixelGrid(grid, width, height);
+    });
+    this.addFramesToLayer(frames, layer, index);
+    return layer;
+  };
+
+  ns.Deserializer_v2.prototype.addFramesToLayer = function (frames, layer, index) {
+    frames.forEach(layer.addFrame.bind(layer));
+
+    this.layers_[index] = layer;
+    this.onLayerLoaded_();
+  };
+
+  ns.Deserializer_v2.prototype.onLayerLoaded_ = function () {
+    this.layersToLoad_ = this.layersToLoad_ - 1;
+    if (this.layersToLoad_ === 0) {
+      this.layers_.forEach(function (layer) {
+        this.piskel_.addLayer(layer);
+      }.bind(this));
+      this.callback_(this.piskel_, {fps: this.data_.piskel.fps});
+    }
+  };
+})();
diff --git a/src/piskel-script-list.js b/src/piskel-script-list.js
index 364c14e0..e80355ec 100644
--- a/src/piskel-script-list.js
+++ b/src/piskel-script-list.js
@@ -43,6 +43,7 @@
   "js/utils/serialization/Deserializer.js",
   "js/utils/serialization/backward/Deserializer_v0.js",
   "js/utils/serialization/backward/Deserializer_v1.js",
+  "js/utils/serialization/backward/Deserializer_v2.js",
 
     // GIF Encoding libraries
   "js/lib/gif/gif.worker.js",