✨ Added refresh token handling + updated models and authentication routes to include the refresh token.

app/dto/__init__.py

@@ -1,3 +1,4 @@
 from .FriendAddDTO import FriendAddDTO
 from .user import UserDTO, UserRegisterDTO, UserAdminDTO
-from .pin import PinDTO, PinShareDTO
+from .pin import PinDTO, PinShareDTO
+from .token import RefreshTokenDTO

app/dto/token.py

@@ -0,0 +1,4 @@
+from pydantic import BaseModel
+
+class RefreshTokenDTO(BaseModel):
+    refresh_token: str 

app/models/token.py

@@ -1,6 +1,7 @@
 from pydantic import BaseModel
 
 class Token(BaseModel):
+    refresh_token: str
     access_token: str
     token_type: str
     user_id: str

app/routes/auth.py

@@ -6,8 +6,8 @@ import pymongo
 
 import app.config as config
 from app.models import User, Token, HTTPError
-from app.dto import UserRegisterDTO
-from app.routes.utils import get_current_user, create_access_token
+from app.dto import UserRegisterDTO, RefreshTokenDTO
+from app.routes.utils import get_current_user, create_access_token, create_refresh_token, get_current_user_from_refresh_token
 from app.utils import get_password_hash, verify_password
 
 # Database setup
@@ -20,6 +20,26 @@ auth_router = APIRouter(
     tags=["Auth"]
 )
 
+def create_tokens(user: User):
+    access_token_expires = timedelta(minutes=config.ACCESS_TOKEN_EXPIRE_MINUTES)
+    access_token = create_access_token(
+        data={
+            "sub": user["username"],
+            "is_admin": user["is_admin"]
+        }, 
+        expires_delta=access_token_expires
+    )
+    refresh_token_expires = timedelta(minutes=config.REFRESH_TOKEN_EXPIRE_MINUTES)
+    refresh_token = create_refresh_token(
+        data={
+            "sub": user["username"],
+            "is_admin": user["is_admin"]
+        },  
+        expires_delta=refresh_token_expires
+    )
+    return access_token, refresh_token
+
+
 @auth_router.post(
     path="/register",
     response_model=Token,
@@ -34,23 +54,18 @@ async def register(user: UserRegisterDTO):
         )
 
     hashed_password = get_password_hash(user.password)
-    user_id = users_collection.insert_one({
-        "username": user.username, 
+    user = {
+        "username": user.username,
         "password": hashed_password,
         "is_admin": False
-    })
+    }
+    user_id = users_collection.insert_one(user)
 
-    access_token_expires = timedelta(minutes=config.ACCESS_TOKEN_EXPIRE_MINUTES)
-    access_token = create_access_token(
-        data={
-            "sub": user.username,
-            "is_admin": False
-        }, 
-        expires_delta=access_token_expires
-    )
+    access_token, refresh_token = create_tokens(user)
 
     return {
         "access_token": access_token, 
+        "refresh_token": refresh_token,
         "token_type": "bearer", 
         "user_id": str(user_id.inserted_id),
         "is_admin": False
@@ -70,25 +85,37 @@ async def login(form_data: OAuth2PasswordRequestForm = Depends()):
             headers={"WWW-Authenticate": "Bearer"},
         )
     
-    access_token_expires = timedelta(minutes=config.ACCESS_TOKEN_EXPIRE_MINUTES)
-    access_token = create_access_token(
-        data={
-            "sub": form_data.username,
-            "is_admin": user.get("is_admin", False)
-        }, 
-        expires_delta=access_token_expires
-    )
+    access_token, refresh_token = create_tokens(user)
 
     return {
         "access_token": access_token, 
+        "refresh_token": refresh_token,
         "token_type": "bearer", 
         "user_id": str(user["_id"]),
         "is_admin": user.get("is_admin", False)
     }
 
+@auth_router.post(
+    path="/refresh-token",
+    response_model=Token,
+    responses={401: {"model": HTTPError}}
+)
+async def refresh(refresh_data: RefreshTokenDTO):
+    current_user = get_current_user_from_refresh_token(refresh_data.refresh_token)
+    new_access_token, new_refresh_token = create_tokens(current_user)
+
+    return {
+        "access_token": new_access_token,
+        "refresh_token": new_refresh_token,
+        "token_type": "bearer",
+        "user_id": str(current_user["_id"]),
+        "is_admin": current_user["is_admin"]
+    }
+
 @auth_router.get(
     path="/logout",
     responses={401: {"model": HTTPError}}
 )
 async def logout(current_user: User = Depends(get_current_user)):
     return {"message": "Logged out"}
+