Extracted serialiser for encryption into a flask module

- allows mocking easier
- shared across methods
- not built everytime

app/encryption.py

@@ -1,5 +1,20 @@
 from flask.ext.bcrypt import generate_password_hash, check_password_hash
 
+from itsdangerous import URLSafeSerializer
+
+
+class Encryption:
+
+    def init_app(self, app):
+        self.serializer = URLSafeSerializer(app.config.get('SECRET_KEY'))
+        self.salt = app.config.get('DANGEROUS_SALT')
+
+    def encrypt(self, thing_to_encrypt):
+        return self.serializer.dumps(thing_to_encrypt, self.salt)
+
+    def decrypt(self, thing_to_decrypt):
+        return self.serializer.loads(thing_to_decrypt, salt=self.salt)
+
 
 def hashpw(password):
     return generate_password_hash(password.encode('UTF-8'), 10)