Merge pull request #127 from fvdpol/master

Add validation to the Change node 'from' field

nodes/core/logic/15-change.html

@@ -61,7 +61,17 @@
         defaults: {
             action: {value:"change",required:true},
             property: {value:"payload"},
-            from: {value:""},
+            from: {value:"",validate: function(v) {
+                if (this.action == "change" && this.reg) {
+                    try {
+                        var re = new RegExp(this.from, "g");
+                        return true;
+                    } catch(err) {
+                        return false;
+                    }
+                }
+                return true;
+            }},
             to: {value:""},
             reg: {value:false},
             name: {value:""}

nodes/core/logic/15-change.js

@@ -43,7 +43,7 @@ function ChangeNode(n) {
             try {
                 node.re = new RegExp(from, "g");
             } catch (e) {
-                node.error("Invalid regex: "+from);
+                node.error(e.message);
             }
             if (typeof msg[node.property] === "string") {
                 msg[node.property] = (msg[node.property]).replace(node.re, node.to);