"""
Various decorators which may be applied to specific routes

See https://stackoverflow.com/a/51820573 for reference.
"""
from flask import g, abort, request
from functools import wraps


def require_user(admin = False, moderator = False):
    """A decorator for any routes which require authentication."""
    def _require_user(handler):
        @wraps(handler)
        def __require_user():
            if getattr(g, 'user', None) is None \
                or (admin and not g.user.admin) \
                or (moderator and not g.user.moderator):
                abort(401)
            return handler()
        return __require_user
    return _require_user


def logger_request_bindings(log):
    """Applied to a route which logs something to have request data bound to the logger."""
    def _lrb(handler):
        @wraps(handler)
        def __lrb():
            log.bind(
                path=request.path,
                method=request.method,
                user_agent=request.user_agent,
                remote_ip=request.remote_addr,
                user=getattr(g, 'user', '(anonymous)'),
            )
            return handler(log)
        return __lrb
    return _lrb