from rest_framework_jwt.authentication import JSONWebTokenAuthentication
from rest_framework_jwt.serializers import jwt_decode_handler
from rest_framework import exceptions
from django.utils.translation import ugettext as _

from crm.models import Consumer

class ConsumerTokenAuthentication(JSONWebTokenAuthentication):
    def authenticate_credentials(self, payload):
        """
        返回登陆消费者
        """
        username = payload['username']

        if not username:
            msg = _('签名有误.')
            raise exceptions.AuthenticationFailed(msg)

        try:
            consumer = Consumer.objects.get(username=username)
        except Consumer.DoesNotExist:
            msg = _('消费者不存在')
            raise exceptions.AuthenticationFailed(msg)


        return consumer