build: Migrate to flat project structure

This change updates the project structure to become flattened.
Previously, the simulator, frontend and API each lived into their own
directory.

With this change, all modules of the project live in the top-level
directory of the repository. This should improve discoverability of
modules of the project.

1 files changed, 36 insertions, 0 deletions

diff --git a/opendc-web/opendc-web-api/opendc/models/user.py b/opendc-web/opendc-web-api/opendc/models/user.py
new file mode 100644
index 00000000..8e8ff945
--- /dev/null
+++ b/opendc-web/opendc-web-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.'))