1 files changed, 84 insertions, 0 deletions
diff --git a/webapps/scripting/client/encoder.js b/webapps/scripting/client/encoder.js
new file mode 100644
index 0000000000..4aa4cc0954
--- /dev/null
+++ b/webapps/scripting/client/encoder.js
@@ -0,0 +1,84 @@
+/*
+	client side js functions for encoding/decoding objects into linear strings
+
+	Copyright Andrew Tridgell 2005
+	released under the GNU GPL Version 2 or later
+*/
+/*
+	usage:
+
+	  enc = encodeObject(obj);
+	  obj = decodeObject(enc);
+
+       The encoded format of the object is a string that is safe to
+       use in URLs
+
+       Note that only data elements are encoded, not functions
+*/
+
+function count_members(o) {
+	var i, count = 0;
+	for (i in o) { 
+		count++;  
+	}
+	return count;
+}
+
+function encodeObject(o) {
+	var i, r = count_members(o) + ":";
+	for (i in o) {
+		var t = typeof(o[i]);
+		if (t == 'object') {
+			r = r + "" + i + ":" + t + ":" + encodeObject(o[i]);
+		} else if (t == 'string') {
+			var s = encodeURIComponent(o[i]).replace(/%/g,'#');
+			r = r + "" + i + ":" + t + ":" + s + ":";
+		} else if (t == 'boolean' || t == 'number') {
+			r = r + "" + i + ":" + t + ":" + o[i] + ":";
+		} else if (t == 'undefined' || t == 'null') {
+			r = r + "" + i + ":" + t + ":";
+		} else if (t != 'function') {
+			alert("Unable to encode type " + t);
+		}
+	}
+	return r;
+}
+
+function decodeObjectArray(a) {
+	var o = new Object();
+	var i, count = a[a.i]; a.i++;
+	for (i=0;i<count;i++) {
+		var name  = a[a.i]; a.i++;
+		var type  = a[a.i]; a.i++;
+		var value;
+		if (type == 'object') {
+			o[name] = decodeObjectArray(a);
+		} else if (type == "string") {
+			value = decodeURIComponent(a[a.i].replace(/#/g,'%')); a.i++;
+			o[name] = value;
+		} else if (type == "boolean") {
+			value = a[a.i]; a.i++;
+			if (value == 'true') {
+				o[name] = true;
+			} else {
+				o[name] = false;
+			}
+		} else if (type == "undefined") {
+			o[name] = undefined;
+		} else if (type == "null") {
+			o[name] = null;
+		} else if (type == "number") {
+			value = a[a.i]; a.i++;
+			o[name] = value * 1;
+		} else {
+			alert("Unable to delinearise type " + type);
+		}
+	}
+	return o;
+}
+
+function decodeObject(str) {
+	var a = str.split(':');
+	a.i = 0;
+	return decodeObjectArray(a);
+}