refactor owrx.form -> owrx.form.input

owrx/form/input/validator.py

@@ -0,0 +1,14 @@
+from abc import ABC, abstractmethod
+from owrx.form.error import ValidationError
+
+
+class Validator(ABC):
+    @abstractmethod
+    def validate(self, key, value):
+        pass
+
+
+class RequiredValidator(Validator):
+    def validate(self, key, value):
+        if value is None or value == "":
+            raise ValidationError(key, "Field is required")