from flask import Flask
from flask_restful import Resource, Api, abort
from functools import wraps
from flask_cors import CORS, cross_origin




app = Flask(__name__)
api = Api(app)
CORS(app)
from flask_jwt import JWT, jwt_required, current_identity
from werkzeug.security import safe_str_cmp

class User(object):
    def __init__(self, id, username, password):
        self.id = id
        self.username = username
        self.password = password

    def __str__(self):
        return "User(id='%s')" % self.id

users = [
    User(1, 'user1', 'abcxyz'),
    User(2, 'user2', 'abcxyz'),
]

username_table = {u.username: u for u in users}
userid_table = {u.id: u for u in users}

def authenticate(username, password):
    user = username_table.get(username, None)
    if user and safe_str_cmp(user.password.encode('utf-8'), password.encode('utf-8')):
        return user

def identity(payload):
    user_id = payload['identity']
    return userid_table.get(user_id, None)

app.config['SECRET_KEY'] = '32rfwdscsacsdcsad'

jwt = JWT(app, authenticate, identity)


def checkuser(func):
    @wraps(func)
    def wrapper(*args, **kwargs):
        if current_identity.username == 'user1':
            return func(*args, **kwargs)
        return abort(401)
    return wrapper

class HelloWorld(Resource):
    decorators = [checkuser, jwt_required()]
    def get(self):
        return {'hello': current_identity.username}

api.add_resource(HelloWorld, '/')

if __name__ == '__main__':
    app.run(debug=True,host='localhost', port=80)