refactor: outsources common validation methods

app/utils/validators/validators.py

@@ -0,0 +1,12 @@
+import re
+from typing import Optional
+
+class Validators:
+
+    @staticmethod
+    def is_valid_str_and_pattern(string: Optional[str], pattern: str):
+        if(isinstance(string, str)):
+            regex = re.compile(pattern)
+            if(regex.match(string) is not None):
+                return True
+        return False