full-stack-fastapi-template/backend/app/api/routes/login.py

from datetime import timedelta
from typing import Annotated, Any

from fastapi import APIRouter, Depends, HTTPException
from fastapi.responses import HTMLResponse
from fastapi.security import OAuth2PasswordRequestForm

from app import crud
from app.api.deps import CurrentUser, SessionDep, get_current_active_superuser
from app.core import security
from app.core.config import settings
from app.core.security import get_password_hash
from app.models import Message, NewPassword, Token, User, UserOut
from app.utils import (
    generate_password_reset_token,
    generate_reset_password_email,
    send_email,
    verify_password_reset_token,
)

router = APIRouter()


@router.post("/login/access-token")
def login_access_token(
    session: SessionDep, form_data: Annotated[OAuth2PasswordRequestForm, Depends()]
) -> Token:
    """
    OAuth2 compatible token login, get an access token for future requests
    """
    user = crud.authenticate(
        session=session, email=form_data.username, password=form_data.password
    )
    if not user:
        raise HTTPException(status_code=400, detail="Incorrect email or password")
    elif not user.is_active:
        raise HTTPException(status_code=400, detail="Inactive user")
    access_token_expires = timedelta(minutes=settings.ACCESS_TOKEN_EXPIRE_MINUTES)
    return Token(
        access_token=security.create_access_token(
            user.id, expires_delta=access_token_expires
        )
    )


@router.post("/login/test-token", response_model=UserOut)
def test_token(current_user: CurrentUser) -> Any:
    """
    Test access token
    """
    return current_user


@router.post("/password-recovery/{email}")
def recover_password(email: str, session: SessionDep) -> Message:
    """
    Password Recovery
    """
    user = crud.get_user_by_email(session=session, email=email)

    if not user:
        raise HTTPException(
            status_code=404,
            detail="The user with this username does not exist in the system.",
        )
    password_reset_token = generate_password_reset_token(email=email)
    email_data = generate_reset_password_email(
        email_to=user.email, email=email, token=password_reset_token
    )
    send_email(
        email_to=user.email,
        subject=email_data.subject,
        html_content=email_data.html_content,
    )
    return Message(message="Password recovery email sent")


@router.post("/reset-password/")
def reset_password(session: SessionDep, body: NewPassword) -> Message:
    """
    Reset password
    """
    email = verify_password_reset_token(token=body.token)
    if not email:
        raise HTTPException(status_code=400, detail="Invalid token")
    user = crud.get_user_by_email(session=session, email=email)
    if not user:
        raise HTTPException(
            status_code=404,
            detail="The user with this username does not exist in the system.",
        )
    elif not user.is_active:
        raise HTTPException(status_code=400, detail="Inactive user")
    hashed_password = get_password_hash(password=body.new_password)
    user.hashed_password = hashed_password
    session.add(user)
    session.commit()
    return Message(message="Password updated successfully")


@router.post(
    "/password-recovery-html-content/{email}",
    dependencies=[Depends(get_current_active_superuser)],
    response_class=HTMLResponse,
)
def recover_password_html_content(email: str, session: SessionDep) -> Any:
    """
    HTML Content for Password Recovery
    """
    user = crud.get_user_by_email(session=session, email=email)

    if not user:
        raise HTTPException(
            status_code=404,
            detail="The user with this username does not exist in the system.",
        )
    password_reset_token = generate_password_reset_token(email=email)
    email_data = generate_reset_password_email(
        email_to=user.email, email=email, token=password_reset_token
    )

    return HTMLResponse(
        content=email_data.html_content, headers={"subject:": email_data.subject}
    )