From cef01bdb89cbc70fdcdf006f6f36000757e7e8a5 Mon Sep 17 00:00:00 2001
From: Ruidy <r.nemausat@empfohlen.de>
Date: Sat, 7 Nov 2020 22:34:00 +0100
Subject: [PATCH] add delete user mutation

---
 app/schema/mutations/__init__.py    |  1 +
 app/schema/mutations/delete_user.py | 20 ++++++++++++++++++++
 app/schema/mutations/mutations.py   | 11 ++++++++++-
 app/usecases/user/delete_user.py    | 11 +++++++++++
 4 files changed, 42 insertions(+), 1 deletion(-)
 create mode 100644 app/schema/mutations/delete_user.py
 create mode 100644 app/usecases/user/delete_user.py

diff --git a/app/schema/mutations/__init__.py b/app/schema/mutations/__init__.py
index 2ca81d4..7da193a 100644
--- a/app/schema/mutations/__init__.py
+++ b/app/schema/mutations/__init__.py
@@ -4,3 +4,4 @@ from .delete_todo import DeleteTodo
 from .update_todo import UpdateTodo
 from .create_user import CreateUser
 from .update_user import UpdateUser
+from .delete_user import DeleteUser
diff --git a/app/schema/mutations/delete_user.py b/app/schema/mutations/delete_user.py
new file mode 100644
index 0000000..b645427
--- /dev/null
+++ b/app/schema/mutations/delete_user.py
@@ -0,0 +1,20 @@
+import graphene
+
+from app.schema.types.user import UserResponseField
+from app.usecases.user.delete_user import delete_user
+
+
+class DeleteUser(graphene.Mutation):
+    class Arguments:
+        user_id = graphene.String(required=True)
+
+    result = graphene.Field(UserResponseField)
+
+    def mutate(self, info, user_id: str):
+        user, is_success = delete_user(user_id)
+        error_message = "This user does not exist." if not is_success else None
+        return DeleteUser(
+            UserResponseField(
+                user=user, is_success=is_success, error_message=error_message
+            )
+        )
diff --git a/app/schema/mutations/mutations.py b/app/schema/mutations/mutations.py
index 47880fe..91dd491 100644
--- a/app/schema/mutations/mutations.py
+++ b/app/schema/mutations/mutations.py
@@ -1,6 +1,14 @@
 import graphene
 
-from . import CreateTodo, DeleteTodo, UpdateTodo, CloseTodo, CreateUser, UpdateUser
+from . import (
+    CreateTodo,
+    DeleteTodo,
+    UpdateTodo,
+    CloseTodo,
+    CreateUser,
+    UpdateUser,
+    DeleteUser,
+)
 
 
 class Mutations(graphene.ObjectType):
@@ -12,3 +20,4 @@ class Mutations(graphene.ObjectType):
     # user
     create_user = CreateUser.Field()
     update_user = UpdateUser.Field()
+    delete_user = DeleteUser.Field()
diff --git a/app/usecases/user/delete_user.py b/app/usecases/user/delete_user.py
new file mode 100644
index 0000000..df87c79
--- /dev/null
+++ b/app/usecases/user/delete_user.py
@@ -0,0 +1,11 @@
+from typing import Tuple
+
+from app.models.user import User
+from app.repositories.users import user_exists, remove_user
+
+
+def delete_user(user_id: str) -> Tuple[User, bool]:
+    if not user_exists(user_id):
+        return None, False
+
+    return remove_user(user_id), True