1 files changed, 36 insertions, 0 deletions
diff --git a/api/opendc/models/user.py b/api/opendc/models/user.py
new file mode 100644
index 00000000..8e8ff945
--- /dev/null
+++ b/api/opendc/models/user.py
@@ -0,0 +1,36 @@
+from opendc.models.model import Model
+from opendc.util.database import DB
+from opendc.util.exceptions import ClientError
+from opendc.util.rest import Response
+
+
+class User(Model):
+    """Model representing a User."""
+
+    collection_name = 'users'
+
+    @classmethod
+    def from_email(cls, email):
+        """Fetches the user with given email from the collection."""
+        return User(DB.fetch_one({'email': email}, User.collection_name))
+
+    @classmethod
+    def from_google_id(cls, google_id):
+        """Fetches the user with given Google ID from the collection."""
+        return User(DB.fetch_one({'googleId': google_id}, User.collection_name))
+
+    def check_correct_user(self, request_google_id):
+        """Raises an error if a user tries to modify another user.
+
+        :param request_google_id:
+        """
+        if request_google_id is not None and self.obj['googleId'] != request_google_id:
+            raise ClientError(Response(403, f'Forbidden from editing user with ID {self.obj["_id"]}.'))
+
+    def check_already_exists(self):
+        """Checks if the user already exists in the database."""
+
+        existing_user = DB.fetch_one({'googleId': self.obj['googleId']}, self.collection_name)
+
+        if existing_user is not None:
+            raise ClientError(Response(409, 'User already exists.'))