Create app.py

app.py

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+import os
+import json
+import uuid
+from datetime import datetime, timedelta
+from typing import List, Dict, Optional, Any
+
+import secrets
+from fastapi import FastAPI, Depends, HTTPException, status, UploadFile, File, Form
+from fastapi.security import OAuth2PasswordBearer, OAuth2PasswordRequestForm
+from fastapi.staticfiles import StaticFiles
+from fastapi.responses import FileResponse, RedirectResponse
+from fastapi.middleware.cors import CORSMiddleware
+from jose import JWTError, jwt
+from passlib.context import CryptContext
+from pydantic import BaseModel, Field
+
+# --- Configuration ---
+# In a real production app, use Hugging Face Space Secrets to set this!
+JWT_SECRET_KEY = os.environ.get("JWT_SECRET_KEY", secrets.token_hex(32))
+ALGORITHM = "HS256"
+ACCESS_TOKEN_EXPIRE_MINUTES = 60 * 24 * 7  # 7 days
+
+# --- Persistent Data Paths (Hugging Face Spaces use /data for persistent storage) ---
+DATA_DIR = "data"
+USERS_DB_FILE = os.path.join(DATA_DIR, "users.json")
+UPLOAD_DIR = os.path.join(DATA_DIR, "uploads")
+
+# Create persistent directories if they don't exist
+os.makedirs(DATA_DIR, exist_ok=True)
+os.makedirs(UPLOAD_DIR, exist_ok=True)
+
+# --- Security & Hashing ---
+pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
+oauth2_scheme = OAuth2PasswordBearer(tokenUrl="token")
+
+# --- Pydantic Models (Data Schemas) ---
+class Token(BaseModel):
+    access_token: str
+    token_type: str
+
+class TokenData(BaseModel):
+    username: Optional[str] = None
+
+class EpisodeUpdate(BaseModel):
+    show_id: str
+    show_title: str
+    season_number: int
+    episode_number: int
+
+class UserBase(BaseModel):
+    username: str
+
+class UserCreate(UserBase):
+    password: str
+
+class UserInDB(UserBase):
+    hashed_password: str
+    profile_picture_url: Optional[str] = None
+    watch_history: List[Dict[str, Any]] = Field(default_factory=list)
+
+class UserPublic(UserBase):
+    profile_picture_url: Optional[str] = None
+    watch_history_detailed: Dict[str, Any] = Field(default_factory=dict)
+
+
+# --- Database Helper Functions (using JSON file) ---
+def load_users() -> Dict[str, Dict]:
+    if not os.path.exists(USERS_DB_FILE):
+        return {}
+    with open(USERS_DB_FILE, "r") as f:
+        try:
+            return json.load(f)
+        except json.JSONDecodeError:
+            return {}
+
+def save_users(users_db: Dict[str, Dict]):
+    with open(USERS_DB_FILE, "w") as f:
+        json.dump(users_db, f, indent=4)
+
+# --- Password & Token Functions ---
+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 create_access_token(data: dict, expires_delta: Optional[timedelta] = None):
+    to_encode = data.copy()
+    if expires_delta:
+        expire = datetime.utcnow() + expires_delta
+    else:
+        expire = datetime.utcnow() + timedelta(minutes=15)
+    to_encode.update({"exp": expire})
+    encoded_jwt = jwt.encode(to_encode, JWT_SECRET_KEY, algorithm=ALGORITHM)
+    return encoded_jwt
+
+# --- Dependency to get current user ---
+async def get_current_user(token: str = Depends(oauth2_scheme)) -> UserInDB:
+    credentials_exception = HTTPException(
+        status_code=status.HTTP_401_UNAUTHORIZED,
+        detail="Could not validate credentials",
+        headers={"WWW-Authenticate": "Bearer"},
+    )
+    try:
+        payload = jwt.decode(token, JWT_SECRET_KEY, algorithms=[ALGORITHM])
+        username: str = payload.get("sub")
+        if username is None:
+            raise credentials_exception
+        token_data = TokenData(username=username)
+    except JWTError:
+        raise credentials_exception
+
+    users_db = load_users()
+    user_data = users_db.get(token_data.username)
+    if user_data is None:
+        raise credentials_exception
+
+    return UserInDB(**user_data)
+
+
+# --- FastAPI App Initialization ---
+app = FastAPI(title="Media Auth API")
+
+# CORS middleware to allow the frontend to communicate with the API
+# This is crucial for web apps.
+app.add_middleware(
+    CORSMiddleware,
+    allow_origins=["*"],  # Allows all origins
+    allow_credentials=True,
+    allow_methods=["*"],  # Allows all methods
+    allow_headers=["*"],  # Allows all headers
+)
+
+# --- Helper function to structure watch history for the frontend ---
+def structure_watch_history(history_list: List[Dict]) -> Dict:
+    """Transforms a flat list of watched episodes into a nested dictionary."""
+    structured = {}
+    for item in history_list:
+        show_id = item.get("show_id")
+        show_title = item.get("show_title", "Unknown Show")
+        season_num = item.get("season_number")
+        episode_num = item.get("episode_number")
+
+        if show_id not in structured:
+            structured[show_id] = {
+                "show_id": show_id,
+                "title": show_title,
+                "seasons": {}
+            }
+        if season_num not in structured[show_id]["seasons"]:
+            structured[show_id]["seasons"][season_num] = {
+                "season_number": season_num,
+                "episodes": {}
+            }
+        structured[show_id]["seasons"][season_num]["episodes"][episode_num] = True
+    return structured
+
+
+# --- API Endpoints ---
+
+@app.post("/token", response_model=Token, tags=["Authentication"])
+async def login_for_access_token(form_data: OAuth2PasswordRequestForm = Depends()):
+    """
+    Standard OAuth2 login. Takes username and password from a form.
+    """
+    users_db = load_users()
+    user_data = users_db.get(form_data.username)
+    if not user_data or not verify_password(form_data.password, user_data["hashed_password"]):
+        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_data["username"]}, expires_delta=access_token_expires
+    )
+    return {"access_token": access_token, "token_type": "bearer"}
+
+
+@app.post("/signup", status_code=status.HTTP_201_CREATED, tags=["Authentication"])
+async def signup_user(user: UserCreate):
+    """
+    Creates a new user account.
+    """
+    users_db = load_users()
+    if user.username in users_db:
+        raise HTTPException(
+            status_code=status.HTTP_400_BAD_REQUEST,
+            detail="Username already registered",
+        )
+    hashed_password = get_password_hash(user.password)
+    new_user = UserInDB(username=user.username, hashed_password=hashed_password)
+    users_db[user.username] = new_user.dict()
+    save_users(users_db)
+    return {"message": "User created successfully. Please login."}
+
+
+@app.get("/users/me", response_model=UserPublic, tags=["User"])
+async def read_users_me(current_user: UserInDB = Depends(get_current_user)):
+    """
+    Fetch the profile of the currently authenticated user.
+    """
+    # The frontend expects a detailed, nested history object. We transform it here.
+    detailed_history = structure_watch_history(current_user.watch_history)
+    
+    # We create a UserPublic object to avoid sending the hashed_password
+    user_public_data = UserPublic(
+        username=current_user.username,
+        profile_picture_url=current_user.profile_picture_url,
+        watch_history_detailed=detailed_history
+    )
+    return user_public_data
+
+
+@app.post("/users/me/profile-picture", response_model=UserPublic, tags=["User"])
+async def upload_profile_picture(
+    file: UploadFile = File(...),
+    current_user: UserInDB = Depends(get_current_user)
+):
+    """
+    Upload or update the user's profile picture.
+    """
+    # Generate a unique filename to prevent overwrites and add extension
+    file_extension = os.path.splitext(file.filename)[1]
+    unique_filename = f"{uuid.uuid4()}{file_extension}"
+    file_path = os.path.join(UPLOAD_DIR, unique_filename)
+
+    # Save the file
+    with open(file_path, "wb") as buffer:
+        buffer.write(await file.read())
+
+    # Update user data with the URL to the new picture
+    # The URL must match the static file mount path
+    profile_picture_url = f"/uploads/{unique_filename}"
+    users_db = load_users()
+    users_db[current_user.username]["profile_picture_url"] = profile_picture_url
+    save_users(users_db)
+
+    # Return the updated user profile
+    current_user.profile_picture_url = profile_picture_url
+    detailed_history = structure_watch_history(current_user.watch_history)
+    return UserPublic(
+        username=current_user.username,
+        profile_picture_url=current_user.profile_picture_url,
+        watch_history_detailed=detailed_history
+    )
+
+
+@app.post("/users/me/watch-history", status_code=status.HTTP_200_OK, tags=["User"])
+async def update_watch_history(
+    episode_data: EpisodeUpdate,
+    current_user: UserInDB = Depends(get_current_user)
+):
+    """
+    Adds a new episode to the user's watch history.
+    """
+    users_db = load_users()
+    user_data = users_db[current_user.username]
+    
+    # Create a unique identifier for the episode to prevent duplicates
+    episode_id = f"{episode_data.show_id}_{episode_data.season_number}_{episode_data.episode_number}"
+    
+    # Check if this exact episode is already in the history
+    is_already_watched = any(
+        (f"{item.get('show_id')}_{item.get('season_number')}_{item.get('episode_number')}" == episode_id)
+        for item in user_data["watch_history"]
+    )
+
+    if not is_already_watched:
+        user_data["watch_history"].append(episode_data.dict())
+        save_users(users_db)
+        return {"message": "Watch history updated."}
+    
+    return {"message": "Episode already in watch history."}
+
+
+# --- Static File Serving ---
+# This serves the uploaded profile pictures from the persistent /data/uploads directory
+app.mount("/uploads", StaticFiles(directory=UPLOAD_DIR), name="uploads")
+
+# This serves the main login/settings pages from the /static directory
+# 'html=True' makes it so that visiting "/" serves "index.html" (we'll name login.html as index.html)
+app.mount("/", StaticFiles(directory="static", html=True), name="static")
+
+
+# Redirect root to login page for convenience
+@app.get("/", include_in_schema=False)
+def root():
+    return RedirectResponse(url="/login.html")