refactor and set up authentication

.gitignore

@@ -1,4 +1,5 @@
 __pycache__
 .venv
+.vscode
 service_account.json
 db.sqlite

app/.gitignore

@@ -0,0 +1 @@
+secrets.py

app/dependencies.py

@@ -0,0 +1,6 @@
+import sqlalchemy
+
+dbEngine = sqlalchemy.create_engine('sqlite:///db.sqlite')
+
+def get_token_header():
+    pass

app/main.py

@@ -0,0 +1,16 @@
+from fastapi import FastAPI
+from app.routers import admin, user
+
+app = FastAPI()
+
+app.include_router(admin.router)
+app.include_router(user.router)
+
+
+@app.get("/")
+def root():
+    return {"message": "Hello World"}
+
+
+# 1PMy17eraogNUz436w3aZKxyij39G1didaN02Ka_-45Q
+# 71046222

app/routers/admin.py

@@ -1,45 +1,48 @@
-from fastapi import FastAPI, HTTPException
-from models import Genre, Song, GoogleFile
+from fastapi import APIRouter, Depends, HTTPException, Security
+from app.models import Genre, Song, GoogleFile
+from app.dependencies import get_token_header, dbEngine
+from app.routers.user import get_current_user, User
+from typing import Annotated
 import gspread
-from types import MethodType
-from typing import Any
+from gspread.urls import DRIVE_FILES_API_V3_URL
 import pandas as pd
 import numpy as np
-import sqlalchemy
 
+router = APIRouter(
+    prefix="/admin",
+    dependencies=[Security(get_current_user, scopes=["admin"])],
+    responses={404: {"description": "Not found"}},
+)
 
-app = FastAPI()
-
-dbEngine = sqlalchemy.create_engine('sqlite:///db.sqlite')
-
-gc = gspread.service_account(filename="service_account.json") # type: ignore
+gc = gspread.service_account(filename="service_account.json")  # type: ignore
 
 google_files: dict[str, GoogleFile] = {}
 
-spreadsheets: dict[str, gspread.Spreadsheet] = {} # type: ignore
+spreadsheets: dict[str, gspread.Spreadsheet] = {}  # type: ignore
 
 selected_worksheets: dict[tuple[str, int], bool] = {}
 
+
 def fetch_files():
-    if not(google_files):
-        for s in gc.http_client.request("get", gspread.http_client.DRIVE_FILES_API_V3_URL).json()["files"]: # type: ignore
-            google_files[s["id"]] = GoogleFile(file_id = s["id"], file_name = s["name"])
+    if not (google_files):
+        for s in gc.http_client.request("get", DRIVE_FILES_API_V3_URL).json()["files"]: #
+            google_files[s["id"]] = GoogleFile(
+                file_id=s["id"], file_name=s["name"])
+
 
 def load_spreadsheet(file_id):
     if file_id not in spreadsheets:
         spreadsheets[file_id] = gc.open_by_key(file_id)
 
-@app.get("/")
-def root():
-    return {"message": "Hello World"}
 
 # Route to get google files (sheets)
-@app.get("/admin/files")
-def get_files() -> dict[str, GoogleFile]:
+@router.get("/files")
+async def get_files() -> dict[str, GoogleFile]:
     fetch_files()
     return google_files
 
-@app.get("/admin/files/{file_id}")
+
+@router.get("/files/{file_id}")
 def get_worksheets(file_id: str) -> dict[int, str]:
     fetch_files()
     if file_id not in google_files:
@@ -47,21 +50,26 @@ def get_worksheets(file_id: str) -> dict[int, str]:
 
     load_spreadsheet(file_id)
 
-    return {ws.id : ws.title for ws in spreadsheets[file_id].worksheets()} # type: ignore
+    # type: ignore
+    return {ws.id: ws.title for ws in spreadsheets[file_id].worksheets()}
 
-@app.get("/admin/selected_worksheets")
+
+@router.get("/selected_worksheets")
 def list_selected_worksheet() -> dict[tuple[str, int], bool]:
     return selected_worksheets
 
-@app.post("/admin/selected_worksheets")
+
+@router.post("/selected_worksheets")
 def select_worksheet(file_id: str, worksheet_id: int, ignore_arrangement: bool = False):
     selected_worksheets[(file_id, worksheet_id)] = ignore_arrangement
 
-@app.delete("/admin/selected_worksheets")
+
+@router.delete("/selected_worksheets")
 def deselect_worksheet(file_id: str, worksheet_id: int):
     del selected_worksheets[(file_id, worksheet_id)]
 
-@app.post("/admin/process_worksheets")
+
+@router.post("/process_worksheets")
 def process_worksheets():
     fetch_files()
 
@@ -82,11 +90,6 @@ def process_worksheets():
 
     song_list = pd.concat(song_list)
 
-    song_list.to_sql(name = 'songs', con = dbEngine, index = False, if_exists = 'append') 
+    song_list.to_sql(name='songs', con=dbEngine,
+                     index=False, if_exists='append')
     # song_list.to_csv("song-list.csv")
-
-
-
-
-# 1PMy17eraogNUz436w3aZKxyij39G1didaN02Ka_-45Q
-# 71046222

app/routers/user.py

@@ -0,0 +1,146 @@
+from datetime import datetime, timedelta, timezone
+from typing import Annotated
+
+from fastapi import Depends, APIRouter, HTTPException, Security, status
+from fastapi.security import OAuth2PasswordBearer, OAuth2PasswordRequestForm, SecurityScopes
+from jose import JWTError, jwt
+from passlib.context import CryptContext
+from pydantic import BaseModel, ValidationError
+
+from app.secrets import SECRET_KEY, fake_users_db
+# to get a string like this run:
+# openssl rand -hex 32
+
+ALGORITHM = "HS256"
+ACCESS_TOKEN_EXPIRE_MINUTES = 30
+
+
+class Token(BaseModel):
+    access_token: str
+    token_type: str
+
+
+class TokenData(BaseModel):
+    username: str | None = None
+    scopes: list[str] = []
+
+
+class User(BaseModel):
+    username: str
+    email: str | None = None
+    full_name: str | None = None
+    disabled: bool | None = None
+
+
+class UserInDB(User):
+    hashed_password: str
+    scopes: list[str] = []
+
+
+pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
+
+oauth2_scheme = OAuth2PasswordBearer(
+    tokenUrl="user/token",
+    scopes={
+        "admin": "Perform admin actions."
+    }
+)
+
+router = APIRouter(
+    prefix="/user"
+)
+
+
+def verify_password(plain_password, hashed_password):
+    return pwd_context.verify(plain_password, hashed_password)
+
+
+def get_password_hash(password):
+    return pwd_context.hash(password)
+
+
+def get_user(db, username: str):
+    if username in db:
+        user_dict = db[username]
+        return UserInDB(**user_dict)
+
+
+def authenticate_user(fake_db, username: str, password: str):
+    user = get_user(fake_db, username)
+    if not user:
+        return False
+    if not verify_password(password, user.hashed_password):
+        return False
+    return user
+
+
+def create_access_token(data: dict, expires_delta: timedelta | None = None):
+    to_encode = data.copy()
+    if expires_delta:
+        expire = datetime.now(timezone.utc) + expires_delta
+    else:
+        expire = datetime.now(timezone.utc) + timedelta(minutes=15)
+    to_encode.update({"exp": expire})
+    encoded_jwt = jwt.encode(to_encode, SECRET_KEY, algorithm=ALGORITHM)
+    return encoded_jwt
+
+
+async def get_current_user(
+    security_scopes: SecurityScopes, token: Annotated[str, Depends(oauth2_scheme)]
+):
+    if security_scopes.scopes:
+        authenticate_value = f'Bearer scope="{security_scopes.scope_str}"'
+    else:
+        authenticate_value = "Bearer"
+    credentials_exception = HTTPException(
+        status_code=status.HTTP_401_UNAUTHORIZED,
+        detail="Could not validate credentials",
+        headers={"WWW-Authenticate": authenticate_value},
+    )
+    try:
+        payload = jwt.decode(token, SECRET_KEY, algorithms=[ALGORITHM])
+        username: str = payload.get("sub")  # type: ignore
+        if username is None:
+            raise credentials_exception
+        token_scopes = payload.get("scopes", [])
+        token_data = TokenData(scopes=token_scopes, username=username)
+    except (JWTError, ValidationError):
+        raise credentials_exception
+    user = get_user(fake_users_db, username=token_data.username or "")
+    if user is None:
+        raise credentials_exception
+    for scope in security_scopes.scopes:
+        if scope not in token_data.scopes:
+            raise HTTPException(
+                status_code=status.HTTP_401_UNAUTHORIZED,
+                detail="Not enough permissions",
+                headers={"WWW-Authenticate": authenticate_value},
+            )
+    return user
+
+
+async def get_current_active_user(
+    current_user: Annotated[User, Security(get_current_user, scopes=["me"])],
+):
+    if current_user.disabled:
+        raise HTTPException(status_code=400, detail="Inactive user")
+    return current_user
+
+
+@router.post("/token")
+async def login_for_access_token(
+    form_data: Annotated[OAuth2PasswordRequestForm, Depends()],
+) -> Token:
+    user = authenticate_user(
+        fake_users_db, form_data.username, form_data.password)
+    if not user:
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED,
+            detail="Incorrect username or password",
+            headers={"WWW-Authenticate": "Bearer"},
+        )
+    access_token_expires = timedelta(minutes=ACCESS_TOKEN_EXPIRE_MINUTES)
+    access_token = create_access_token(
+        data={"sub": user.username, "scopes": user.scopes}, expires_delta=access_token_expires
+    )
+    return Token(access_token=access_token, token_type="bearer")

requirements.txt

@@ -4,3 +4,6 @@ gspread
 pandas
 numpy
 sqlalchemy
+python-jose[cryptography]
+passlib[bcrypt]
+python-multipart