pull json validation for OT into its own module for reuse

www/common/json-ot.js

@@ -0,0 +1,25 @@
+define([
+    '/common/realtime-input.js'
+], function () {
+    var ChainPad = window.ChainPad;
+    var JsonOT = {};
+
+    var validate = JsonOT.validate = function (text, toTransform, transformBy) {
+        var resultOp = ChainPad.Operation.transform0(text, toTransform, transformBy);
+        var text2 = ChainPad.Operation.apply(transformBy, text);
+        var text3 = ChainPad.Operation.apply(resultOp, text2);
+        try {
+            JSON.parse(text3);
+            return resultOp;
+        } catch (e) {
+            console.log(e);
+        }
+
+        // returning **null** breaks out of the loop
+        // which transforms conflicting operations
+        // in theory this should prevent us from producing bad JSON
+        return null;
+    };
+
+    return JsonOT;
+});