Support for prototypes in stringify and parse

jsonfn.js

@@ -1,83 +1,113 @@
 /**
-* JSONfn - javascript (both node.js and browser) plugin to stringify, 
-*          parse and clone objects with Functions, Regexp and Date.
-*  
-* Version - 0.60.00
-* Copyright (c) 2012 - 2014 Vadim Kiryukhin
-* vkiryukhin @ gmail.com
-* http://www.eslinstructor.net/jsonfn/
-* 
-* Licensed under the MIT license ( http://www.opensource.org/licenses/mit-license.php )
-*
-*   USAGE:
-*     browser:
-*         JSONfn.stringify(obj);
-*         JSONfn.parse(str[, date2obj]);
-*         JSONfn.clone(obj[, date2obj]);
-*
-*     nodejs:
-*       var JSONfn = require('path/to/json-fn');
-*       JSONfn.stringify(obj);
-*       JSONfn.parse(str[, date2obj]);
-*       JSONfn.clone(obj[, date2obj]);
-*
-*
-*     @obj      -  Object;
-*     @str      -  String, which is returned by JSONfn.stringify() function; 
-*     @date2obj - Boolean (optional); if true, date string in ISO8061 format
-*                 is converted into a Date object; otherwise, it is left as a String.
-*/
+ * JSONfn - javascript (both node.js and browser) plugin to stringify,
+ *          parse and clone objects with Functions, Regexp and Date.
+ *
+ * Version - 0.60.00
+ * Copyright (c) 2012 - 2014 Vadim Kiryukhin
+ * vkiryukhin @ gmail.com
+ * http://www.eslinstructor.net/jsonfn/
+ *
+ * Licensed under the MIT license ( http://www.opensource.org/licenses/mit-license.php )
+ *
+ *   USAGE:
+ *     browser:
+ *         JSONfn.stringify(obj);
+ *         JSONfn.parse(str[, date2obj]);
+ *         JSONfn.clone(obj[, date2obj]);
+ *
+ *     nodejs:
+ *       var JSONfn = require('path/to/json-fn');
+ *       JSONfn.stringify(obj);
+ *       JSONfn.parse(str[, date2obj]);
+ *       JSONfn.clone(obj[, date2obj]);
+ *
+ *
+ *     @obj      -  Object;
+ *     @str      -  String, which is returned by JSONfn.stringify() function;
+ *     @date2obj - Boolean (optional); if true, date string in ISO8061 format
+ *                 is converted into a Date object; otherwise, it is left as a String.
+ */
 
 "use strict";
 
 (function (exports) {
 
-  exports.stringify = function (obj) {
-
-    return JSON.stringify(obj, function (key, value) {
-      if (value instanceof Function || typeof value == 'function') {
-        return value.toString();
-      }
-      if (value instanceof RegExp) {
-        return '_PxEgEr_' + value;
-      }
-      return value;
-    });
-  };
-
-  exports.parse = function (str, date2obj) {
-
-    var iso8061 = date2obj ? /^(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2}):(\d{2}(?:\.\d*)?)Z$/ : false;
-
-    return JSON.parse(str, function (key, value) {
-      var prefix;
-
-      if (typeof value != 'string') {
-        return value;
-      }
-      if (value.length < 8) {
-        return value;
-      }
-
-      prefix = value.substring(0, 8);
-
-      if (iso8061 && value.match(iso8061)) {
-        return new Date(value);
-      }
-      if (prefix === 'function') {
-        return eval('(' + value + ')');
-      }
-      if (prefix === '_PxEgEr_') {
-        return eval(value.slice(8));
-      }
-
-      return value;
-    });
-  };
-
-  exports.clone = function (obj, date2obj) {
-    return exports.parse(exports.stringify(obj), date2obj);
-  };
+
+
+    exports.stringify = function(obj) {
+
+        //Original Stringify
+        var partialStringify = function (obj) {
+
+            return JSON.stringify(obj, function (key, value) {
+
+                if (value instanceof Function || typeof value == 'function') {
+                    return value.toString();
+                }
+                if (value instanceof RegExp) {
+                    return '_PxEgEr_' + value;
+                }
+                return value;
+            });
+        };
+
+        //Calculate normal return
+        var normal = partialStringify(obj);
+        //Stringify prototype
+        var proto = obj.__proto__? this.stringify(obj.__proto__): "";
+
+        //If prototype was not {} empty
+        if( proto.length > 2 ) {
+            //Slide the brackets and put a coma in between
+            return normal.slice(0,-1) + ', "__proto__" : ' + proto + '}';
+        } else {
+            return normal;
+        }
+
+    };
+
+    exports.parse = function (str, date2obj) {
+
+        var iso8061 = date2obj ? /^(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2}):(\d{2}(?:\.\d*)?)Z$/ : false;
+
+        var obj = JSON.parse(str, function (key, value) {
+            var prefix;
+
+            if (typeof value != 'string') {
+                return value;
+            }
+            if (value.length < 8) {
+                return value;
+            }
+
+            prefix = value.substring(0, 8);
+
+            if (iso8061 && value.match(iso8061)) {
+                return new Date(value);
+            }
+            if (prefix === 'function') {
+                return eval('(' + value + ')');
+            }
+            if (prefix === '_PxEgEr_') {
+                return eval(value.slice(8));
+            }
+
+            return value;
+        });
+
+        if( obj.__proto__ ) {
+            var n = obj.__proto__;
+            delete obj.__proto__;
+
+            obj.__proto__ = n;
+        }
+
+        return obj;
+    };
+
+    exports.clone = function (obj, date2obj) {
+        return exports.parse(exports.stringify(obj), date2obj);
+    };
 
 }(typeof exports === 'undefined' ? (window.JSONfn = {}) : exports));