[mastodon] Return 422 error for invalid input when creating mastodon bot

backend/setup.cfg

@@ -35,6 +35,7 @@ install_requires =
     requests
     scrypt
     Mastodon.py
+    pydantic[email]
 
 [options.packages.find]
 where = src

backend/src/kibicara/platforms/mastodon/webapi.py

@@ -5,14 +5,14 @@
 
 from fastapi import APIRouter, Depends, HTTPException, Response, status
 from ormantic.exceptions import NoMatch
-from pydantic import BaseModel
+from pydantic import BaseModel, validate_email, validator
 
 from kibicara.config import config
 from kibicara.platforms.mastodon.bot import spawner
 from kibicara.platforms.mastodon.model import MastodonAccount, MastodonInstance
 from kibicara.webapi.hoods import get_hood, get_hood_unauthorized
 
-from mastodon import Mastodon, MastodonError
+from mastodon import Mastodon, MastodonError, MastodonNetworkError
 
 from logging import getLogger
 
@@ -29,6 +29,14 @@ class BodyMastodonAccount(BaseModel):
     instance_url: str
     password: str
 
+    @validator("email")
+    def validate_email(cls, value):
+        return validate_email(value)
+
+
+class HTTPError(BaseModel):
+    status_code: int
+
 
 async def get_mastodon(mastodon_id, hood=Depends(get_hood)):
     try:
@@ -141,7 +149,10 @@ async def mastodon_stop(mastodon=Depends(get_mastodon)):
 @router.post(
     "/",
     status_code=status.HTTP_201_CREATED,
-    # TODO response_model
+    responses={
+        201: {"model": MastodonAccount},
+        422: {"model": HTTPError, "description": "Invalid Input"},
+    },
     operation_id="create_mastodon",
 )
 async def mastodon_create(values: BodyMastodonAccount, hood=Depends(get_hood)):
@@ -153,7 +164,10 @@ async def mastodon_create(values: BodyMastodonAccount, hood=Depends(get_hood)):
     :param: values: a BodyMastodonAccount object in json
     :param: hood: the hood ORM object
     """
+    try:
         instance = await get_mastodon_instance(values.instance_url)
+    except MastodonNetworkError:
+        raise HTTPException(422, "Invalid Mastodon Instance")
     account = Mastodon(
         instance.client_id, instance.client_secret, api_base_url=values.instance_url
     )
@@ -161,7 +175,7 @@ async def mastodon_create(values: BodyMastodonAccount, hood=Depends(get_hood)):
         access_token = account.log_in(values.email, values.password)
     except MastodonError:
         logger.warning("Login to Mastodon failed.", exc_info=True)
-        return  # show error to user
+        return HTTPException(422, "Login to Mastodon failed")
     return await MastodonAccount.objects.create(
         hood=hood,
         instance=instance,