From cf9dd90e48ca285b9149c31b1b3f1aab1109da7b Mon Sep 17 00:00:00 2001
From: "Alex A. Naanou" <alex.nanou@gmail.com>
Date: Mon, 30 Sep 2024 14:12:08 +0300
Subject: [PATCH] added base code...

Signed-off-by: Alex A. Naanou <alex.nanou@gmail.com>
---
 serialize.js | 85 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 85 insertions(+)
 create mode 100644 serialize.js

diff --git a/serialize.js b/serialize.js
new file mode 100644
index 0000000..aa8c92c
--- /dev/null
+++ b/serialize.js
@@ -0,0 +1,85 @@
+/**********************************************************************
+* 
+* XXX the structure of this will change!!
+*
+**********************************************************************/
+((typeof define)[0]=='u'?function(f){module.exports=f(require)}:define)
+(function(require){ var module={} // make module AMD/node compatible...
+/*********************************************************************/
+
+
+
+
+/*********************************************************************/
+
+//
+// This extends JSON.stringify(..) adding suppoort for:
+// 		- empty
+// 		- NaN
+// 		- undefined
+//
+var EMPTY = '<< EMPTY >>'
+var UNDEFINED = '<< UNDEFINED >>'
+var NAN = '<< NAN >>'
+
+var serialize = 
+module.serialize =
+function(value, raw=false){
+	var replacer = function(k, v){
+		// undefined...
+		if(v === undefined){
+			return UNDEFINED
+		// NaN...
+		} else if(typeof(v) == 'number' 
+				&& isNaN(v)){
+			return NAN
+		// <empty>...
+		} else if(v instanceof Array){
+			copy = [...v]
+			for(var i=0; i < v.length; i++){
+				if(! (i in v)){
+					copy[i] = EMPTY } }
+			v = copy }
+		return v }
+
+	return raw ?
+		JSON.stringify(value, replacer)
+		: JSON.stringify(value, replacer)
+			// cleanup placeholders...	
+			.replace(new RegExp('"'+ EMPTY +'"', 'g'), '<empty>')
+			.replace(new RegExp('"'+ UNDEFINED +'"', 'g'), 'undefined')
+			.replace(new RegExp('"'+ NAN +'"', 'g'), 'NaN') }
+
+
+var deserialize = 
+module.deserialize =
+function(str){
+	var PLACEHOLDER = {}
+	var reviver = function(key, value, context){
+		if(value == UNDEFINED){
+			return PLACEHOLDER }
+		return value == NAN ?
+				NaN
+			: value === EMPTY ?
+				undefined
+			: value }
+	// NOTE: this is needed as we returning undefined from reviver(..)
+	// 		will leave the value empty.
+	var cleanup = function(obj){
+		if(typeof(obj) == 'object'){
+			for(var key in obj){
+				if(obj[key] === PLACEHOLDER){
+					obj[key] = undefined 
+				} else {
+					cleanup(obj[key]) } } } 
+		return obj }
+
+	var res = JSON.parse(str, reviver)
+
+	return cleanup(res) }
+
+
+
+
+/**********************************************************************
+* vim:set ts=4 sw=4 :                               */ return module })