LM History: Added diff method to get an Object comparison and understand what has changed. Useful for debugging. Can be used via console through the command G5.lm.history.diff()

platforms/common/application/lm/history.js

@@ -2,7 +2,8 @@ var prime      = require('prime'),
     Emitter    = require('prime/emitter'),
     slice      = require('mout/array/slice'),
     merge      = require('mout/object/merge'),
-    deepEquals = require('mout/lang/deepEquals');
+    deepEquals = require('mout/lang/deepEquals'),
+    deepDiff   = require('deep-diff').diff;
 
 var History = new prime({
 
@@ -62,7 +63,7 @@ var History = new prime({
     },
 
     get: function(index) {
-        return this.session[index || this.index] || false;
+        return this.session[typeof index !== 'undefined' ? index : this.index] || false;
     },
 
     equals: function(session, compare) {
@@ -71,6 +72,14 @@ var History = new prime({
         return deepEquals(session, compare);
     },
 
+    diff: function(obj1, obj2) {
+        if (!obj1 && !obj2 && this.session.length <= 1) { return 'Not enough sessions to diff'; }
+        if (!obj2) { obj2 = this.get(); }
+        if (!obj1) { obj1 = this.get(this.index - 1); }
+
+        return deepDiff(obj1, obj2);
+    },
+
     setSession: function(session, preset) {
         session = !session ? []
             : [{

platforms/common/package.json

@@ -17,6 +17,7 @@
   },
   "devDependencies": {
     "browserify": "^13.0.0",
+    "deep-diff": "^0.3.3",
     "gulp": "^3.9.1",
     "gulp-if": "^2.0.0",
     "gulp-rename": "^1.2.2",