Create validation_engine.py

validation_engine.py

@@ -0,0 +1,57 @@
+import re
+from log import log
+
+
+class ValidationEngine:
+    def __init__(self):
+        pass
+
+    def validate_parameters(self, intent_def, variables):
+        """
+        Checks all parameters defined in the intent against provided variables.
+        Returns: (is_valid, error_messages)
+        """
+        is_valid = True
+        error_messages = []
+
+        for param_def in intent_def.get("parameters", []):
+            name = param_def.get("name")
+            expected_type = param_def.get("type", "string")
+            regex = param_def.get("regex")
+            validation_message = param_def.get("validation_message", f"Invalid value for {name}.")
+
+            value = variables.get(name)
+
+            # Check existence
+            if value is None:
+                continue  # Missing parameters are handled elsewhere
+
+            # Type check
+            if expected_type == "string":
+                if not isinstance(value, str):
+                    is_valid = False
+                    error_messages.append(f"{validation_message} Expected a string.")
+                    continue
+            elif expected_type == "int":
+                if not isinstance(value, int):
+                    is_valid = False
+                    error_messages.append(f"{validation_message} Expected an integer.")
+                    continue
+            elif expected_type == "float":
+                if not isinstance(value, float):
+                    is_valid = False
+                    error_messages.append(f"{validation_message} Expected a float.")
+                    continue
+
+            # Regex check
+            if regex and isinstance(value, str):
+                if not re.match(regex, value):
+                    is_valid = False
+                    error_messages.append(validation_message)
+
+        if is_valid:
+            log("✅ Parameter validation passed.")
+        else:
+            log(f"❌ Parameter validation failed: {error_messages}")
+
+        return is_valid, error_messages