from flask_sqlalchemy import SQLAlchemy
from flask_login import LoginManager
from flask_migrate import Migrate
from flask_wtf.csrf import CSRFProtect
from flask_limiter import Limiter
from flask_limiter.util import get_remote_address

db = SQLAlchemy()
login_manager = LoginManager()
migrate = Migrate()
csrf = CSRFProtect()
limiter = Limiter(key_func=get_remote_address)   # storage backend set via RATELIMIT_STORAGE_URI in app config

login_manager.login_view = 'auth.login'
login_manager.login_message = 'Please log in to access this page.'
login_manager.login_message_category = 'warning'