First Config

do_dashboard.py

@@ -843,6 +843,33 @@ def _execute_custom_function(function_name, args, output_request):
 
         return "undefined"
 
+    elif function_name == "concat":
+        # Args: [separator, field_name_1, field_name_2, ..., field_name_n]
+        #   separator    : string to insert between concatenated values
+        #   field_name_* : names of already-computed fields in output_request to concatenate
+        #                  undefined/None values are silently skipped
+        if not args or len(args) < 2:
+            return "$$$$ Argument Error: concat requires at least 2 arguments (separator + 1 field)"
+
+        separator = args[0]
+        if not isinstance(separator, str):
+            return "$$$$ Argument Error: concat separator (arg1) must be a string"
+
+        field_names = args[1:]
+        parts = []
+        all_undefined = True
+
+        for field_name in field_names:
+            value = get_value_from_request(output_request, field_name)
+            if value is not None and value != "undefined":
+                all_undefined = False
+                parts.append(str(value))
+
+        if all_undefined:
+            return "undefined"
+
+        return separator.join(parts)
+
     return f"$$$$ Unknown Custom Function: {function_name}"