GH-11: Add exceptions to backend (merge with feature/backend)

backend/api.py

@@ -1,7 +1,9 @@
+from __future__ import annotations
+
 import requests
 from backend import Route
 from models import Player, Alliance
-
+from .exceptions import AccessForbidden, ValidationError
 from typing import Dict
 
 __all__ = ("API",)
@@ -27,9 +29,11 @@ def request(
             method, url, headers=headers, params=query_params, json=json, **kwargs
         )
         if response.status_code == 403:
-            raise Exception("Access Forbidden")
+            raise AccessForbidden(response.status_code)
             # handle error here however you want to
             # error 403 & 401 are Access Forbidden
+        elif response.status_code == 422:
+            raise ValidationError(response.status_code, json)
 
         return response
 

backend/exceptions.py

@@ -0,0 +1,21 @@
+from __future__ import annotations
+
+__all__ = ("BackendException", "AccessForbidden", "ValidationError")
+
+
+class BackendException(BaseException):
+    """Base exception for all exceptions in this module"""
+
+
+class AccessForbidden(BackendException):
+    def __init__(self, status_code: int) -> None:
+        super().__init__(f"API returned {status_code}")
+
+
+class ValidationError(BackendException):
+    def __init__(self, status_code: int, payload: dict) -> None:
+        self.payload = payload
+        super().__init__(
+            f"API returned {status_code}. This usually occurs to arguments not being specified or the API being unable to process this request. ",
+            payload,
+        )