Add RED.util.get/setObjectProperty to avoid stripping msg.

red/runtime/util.js

@@ -235,10 +235,13 @@ function normalisePropertyExpression(str) {
 }
 
 function getMessageProperty(msg,expr) {
-    var result = null;
     if (expr.indexOf('msg.')===0) {
         expr = expr.substring(4);
     }
+    return getObjectProperty(msg,expr);
+}
+function getObjectProperty(msg,expr) {
+    var result = null;
     var msgPropParts = normalisePropertyExpression(expr);
     var m;
     msgPropParts.reduce(function(obj, key) {
@@ -249,12 +252,15 @@ function getMessageProperty(msg,expr) {
 }
 
 function setMessageProperty(msg,prop,value,createMissing) {
-    if (typeof createMissing === 'undefined') {
-        createMissing = (typeof value !== 'undefined');
-    }
     if (prop.indexOf('msg.')===0) {
         prop = prop.substring(4);
     }
+    return setObjectProperty(msg,prop,value,createMissing);
+}
+function setObjectProperty(msg,prop,value,createMissing) {
+    if (typeof createMissing === 'undefined') {
+        createMissing = (typeof value !== 'undefined');
+    }
     var msgPropParts = normalisePropertyExpression(prop);
     var depth = 0;
     var length = msgPropParts.length;
@@ -584,6 +590,8 @@ module.exports = {
     generateId: generateId,
     getMessageProperty: getMessageProperty,
     setMessageProperty: setMessageProperty,
+    getObjectProperty: getObjectProperty,
+    setObjectProperty: setObjectProperty,
     evaluateNodeProperty: evaluateNodeProperty,
     normalisePropertyExpression: normalisePropertyExpression,
     normaliseNodeTypeName: normaliseNodeTypeName,

test/red/runtime/util_spec.js

@@ -141,7 +141,15 @@ describe("red/util", function() {
             cloned.res.should.equal(msg.res);
         });
     });
-
+    describe('getObjectProperty', function() {
+        it('gets a property beginning with "msg."', function() {
+            // getMessageProperty strips off `msg.` prefixes.
+            // getObjectProperty does not
+            var obj = { msg: { a: "foo"}, a: "bar"};
+            var v = util.getObjectProperty(obj,"msg.a");
+            v.should.eql("foo");
+        })
+    });
     describe('getMessageProperty', function() {
         it('retrieves a simple property', function() {
             var v = util.getMessageProperty({a:"foo"},"msg.a");
@@ -169,7 +177,16 @@ describe("red/util", function() {
         });
 
     });
-
+    describe('setObjectProperty', function() {
+        it('set a property beginning with "msg."', function() {
+            // setMessageProperty strips off `msg.` prefixes.
+            // setObjectProperty does not
+            var obj = {};
+            util.setObjectProperty(obj,"msg.a","bar");
+            obj.should.have.property("msg");
+            obj.msg.should.have.property("a","bar");
+        })
+    });
     describe('setMessageProperty', function() {
         it('sets a property', function() {
             var msg = {a:"foo"};