adding new JSON parsing JS code, for wrapped class objects

git-svn-id: svn://svn.open-ils.org/OpenSRF/trunk@1074 9efc2488-bf62-4759-914b-345cdb29e865

diff --git a/src/javascript/JSON_wrapper.js b/src/javascript/JSON_wrapper.js
new file mode 100644 (file)
index 0000000..cfc0a36
--- /dev/null
+++ b/src/javascript/JSON_wrapper.js
@@ -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;
+}
+
+