From b8415b87f5219178a83af625e549164add199536 Mon Sep 17 00:00:00 2001
From: Backend IM Bot <bot@backend.im>
Date: Thu, 20 Mar 2025 20:39:58 +0100
Subject: [PATCH] Update code in endpoints/them.get.py

---
 endpoints/them.get.py | 115 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 115 insertions(+)
 create mode 100644 endpoints/them.get.py

diff --git a/endpoints/them.get.py b/endpoints/them.get.py
new file mode 100644
index 0000000..a764d41
--- /dev/null
+++ b/endpoints/them.get.py
@@ -0,0 +1,115 @@
+from typing import Optional
+from datetime import datetime, timedelta
+from fastapi import APIRouter, Depends, HTTPException, status, Response
+from fastapi.security import OAuth2PasswordBearer, OAuth2PasswordRequestForm
+from jose import JWTError, jwt
+from passlib.context import CryptContext
+from pydantic import BaseModel
+from core.database import fake_users_db
+
+# JWT and Password Hashing Setup
+SECRET_KEY = "09d25e094faa6ca2556c818166b7a9563b93f7099f6f0f4caa6cf63b88e8d3e7"
+ALGORITHM = "HS256"
+ACCESS_TOKEN_EXPIRE_MINUTES = 30
+
+pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
+oauth2_scheme = OAuth2PasswordBearer(tokenUrl="token")
+
+# JWT Helper 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 authenticate_user(username: str, password: str):
+    user = fake_users_db.get(username)
+    if not user:
+        return False
+    if not verify_password(password, user["password"]):
+        return False
+    return user
+
+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, SECRET_KEY, algorithm=ALGORITHM)
+    return encoded_jwt
+
+# Data Models
+class Token(BaseModel):
+    access_token: str
+    token_type: str
+
+class TokenData(BaseModel):
+    username: Optional[str] = None
+
+# Router Setup
+router = APIRouter()
+
+# Login Endpoint
+@router.post("/token", response_model=Token)
+async def login_for_access_token(form_data: OAuth2PasswordRequestForm = Depends()):
+    """Login endpoint to get access token"""
+    user = authenticate_user(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"]}, expires_delta=access_token_expires
+    )
+    response = {"access_token": access_token, "token_type": "bearer"}
+    
+    # Store token in cookie
+    response = Response(**response)
+    response.set_cookie(key="access_token", value=access_token, httponly=True)
+    return response
+
+# Helper function to get current user from token
+async def get_current_user(token: str = Depends(oauth2_scheme)):
+    credentials_exception = HTTPException(
+        status_code=status.HTTP_401_UNAUTHORIZED,
+        detail="Could not validate credentials",
+        headers={"WWW-Authenticate": "Bearer"},
+    )
+    try:
+        payload = jwt.decode(token, 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
+    user = fake_users_db.get(token_data.username)
+    if user is None:
+        raise credentials_exception
+    return user
+
+# Authenticated user endpoint
+@router.get("/users/me/", response_model=dict)
+async def read_users_me(current_user: dict = Depends(get_current_user)):
+    """Fetch current authenticated user"""
+    return {
+        "message": "User found",
+        "data": current_user
+    }
+```
+
+This code provides the following functionality:
+
+1. **Login Endpoint**: `/token` endpoint to authenticate a user and return an access token. The token is stored in a browser cookie.
+2. **User Endpoint**: `/users/me` endpoint to fetch the current authenticated user's data using the access token.
+3. **JWT Implementation**: JSON Web Token (JWT) implementation for generating and verifying access tokens.
+4. **Password Hashing**: Password hashing and verification using the `passlib` library.
+5. **Helper Functions**: Functions for user authentication, password verification, token generation, and getting the current user from the token.
+6. **Data Models**: Pydantic models for Token and TokenData.
+
+Note: This code uses a fake user database (`fake_users_db`) for demonstration purposes. In a real application, you would replace it with an actual database implementation.
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