[Opensrf-commits] r1074 - trunk/src/javascript

[svn at svn.open-ils.org]

Author: erickson
Date: 2007-08-03 15:31:12 -0400 (Fri, 03 Aug 2007)
New Revision: 1074

Added:
   trunk/src/javascript/JSON_wrapper.js
Log:
adding new JSON parsing JS code, for wrapped class objects

Added: trunk/src/javascript/JSON_wrapper.js
===================================================================
--- trunk/src/javascript/JSON_wrapper.js	                        (rev 0)
+++ trunk/src/javascript/JSON_wrapper.js	2007-08-03 19:31:12 UTC (rev 1074)
@@ -0,0 +1,201 @@
+var JSON_CLASS_KEY	= '__c';
+var JSON_DATA_KEY	= '__p';
+
+
+
+function JSON_version() { return 'wrapper' }
+
+function JSON2js(text) {
+	return decodeJS(JSON2jsRaw(text));
+}
+
+function JSON2jsRaw(text) {
+	var obj;
+	eval('obj = ' + text);
+	return obj;
+}
+
+
+/* iterates over object, arrays, or fieldmapper objects */
+function jsIterate( arg, callback ) {
+	if( arg && typeof arg == 'object' ) {
+		if( arg.constructor == Array ) {
+			for( var i = 0; i < arg.length; i++ ) 
+				callback(arg, i);
+
+		}  else if( arg.constructor == Object ) {
+				for( var i in arg ) 
+					callback(arg, i);
+
+		} else if( arg._isfieldmapper && arg.a ) {
+			for( var i = 0; i < arg.a.length; i++ ) 
+				callback(arg.a, i);
+		}
+	}
+}
+
+
+/* removes the class/paylod wrapper objects */
+function decodeJS(arg) {
+
+	if(arg == null) return null;
+
+	if(	arg && typeof arg == 'object' &&
+			arg.constructor == Object &&
+			arg[JSON_CLASS_KEY] ) {
+		eval('arg = new ' + arg[JSON_CLASS_KEY] + '(arg[JSON_DATA_KEY])');	
+	}
+
+	jsIterate( arg, 
+		function(o, i) {
+			o[i] = decodeJS(o[i]);
+		}
+	);
+
+	return arg;
+}
+
+
+function jsClone(obj) {
+	if( obj == null ) return null;
+	if( typeof obj != 'object' ) return obj;
+
+	var newobj;
+	if (obj.constructor == Array) {
+		newobj = [];
+		for( var i = 0; i < obj.length; i++ ) 
+			newobj[i] = jsClone(obj[i]);
+
+	} else if( obj.constructor == Object ) {
+		newobj = {};
+		for( var i in obj )
+			newobj[i] = jsClone(obj[i]);
+
+	} else if( obj._isfieldmapper && obj.a ) {
+		eval('newobj = new '+obj.classname + '();');
+		for( var i = 0; i < obj.a.length; i++ ) 
+			newobj.a[i] = jsClone(obj.a[i]);
+	}
+
+	return newobj;
+}
+	
+
+/* adds the class/paylod wrapper objects */
+function encodeJS(arg) {
+	if( arg == null ) return null;	
+	if( typeof arg != 'object' ) return arg;
+
+	if( arg._isfieldmapper ) {
+      var newarr = []
+      if(!arg.a) arg.a = [];
+		for( var i = 0; i < arg.a.length; i++ ) 
+			newarr[i] = encodeJS(arg.a[i]);
+
+		var a = {};
+		a[JSON_CLASS_KEY] = arg.classname;
+		a[JSON_DATA_KEY] = newarr;
+      return a;
+	}
+
+	var newobj;
+
+	if(arg.length != undefined) {
+		newobj = [];
+		for( var i = 0; i < arg.length; i++ ) 
+         newobj.push(encodeJS(arg[i]));
+      return newobj;
+	} 
+   
+	newobj = {};
+	for( var i in arg )
+		newobj[i] = encodeJS(arg[i]);
+	return newobj;
+}
+
+/* turns a javascript object into a JSON string */
+function js2JSON(arg) {
+	return js2JSONRaw(encodeJS(arg));
+}
+
+function js2JSONRaw(arg) {
+
+	if( arg == null ) 
+		return 'null';
+
+	var o;
+
+	switch (typeof arg) {
+
+		case 'object':
+
+			if (arg.constructor == Array) {
+				o = '';
+				jsIterate( arg,
+					function(obj, i) {
+						if (o) o += ',';
+						o += js2JSONRaw(obj[i]);
+					}
+				);
+				return '[' + o + ']';
+
+			} else if (typeof arg.toString != 'undefined') {
+				o = '';
+				jsIterate( arg,
+					function(obj, i) {
+						if (o) o += ',';
+						o = o + js2JSONRaw(i) + ':' + js2JSONRaw(obj[i]);
+					}
+				);
+				return '{' + o + '}';
+
+			} else {
+				return 'null';
+			}
+
+		case 'number': return arg;
+
+		case 'string':
+			var s = String(arg);
+			s = s.replace(/\\/g, '\\\\');
+			s = s.replace(/"/g, '\\"');
+			s = s.replace(/\t/g, "\\t");
+			s = s.replace(/\n/g, "\\n");
+			s = s.replace(/\r/g, "\\r");
+			s = s.replace(/\f/g, "\\f");
+			return '"' + s + '"';
+
+		default: return 'null';
+	}
+}
+
+
+function __tabs(c) { 
+	var s = ''; 
+	for( i = 0; i < c; i++ ) s += '\t';
+	return s;
+}
+
+function jsonPretty(str) {
+	if(!str) return "";
+	var s = '';
+	var d = 0;
+	for( var i = 0; i < str.length; i++ ) {
+		var c = str.charAt(i);
+		if( c == '{' || c == '[' ) {
+			s += c + '\n' + __tabs(++d);
+		} else if( c == '}' || c == ']' ) {
+			s += '\n' + __tabs(--d) + '\n';
+			if( str.charAt(i+1) == ',' ) {
+				s += '\n' + __tabs(d);
+			}
+		} else if( c == ',' ) {
+			s += ',\n' + __tabs(d);
+		} else {
+			s += c;
+		}
+	}
+	return s;
+}
+
+