import json

class MysqlDatabases:
    def __init__(self):
        self.users = json.loads(open('users.json',mode='r',encoding='utf-8').read())
        self.cake = json.loads(open('cake.json', mode='r', encoding='utf-8').read())

    def check_login(self,username,password):
        for user in self.users:
            if username == user['username']:
                if password == user['password']:
                    return True,'登录成功'
        return False,'登录失败，密码不存在'

    def check_register(self,username):
        for user in self.users:
            if username == user['username']:
                return False, '注册失败，用户已存在'
        return True, '注册成功'


    def all(self):
        return self.cake

    def insert(self,student):
        self.cake.append(student)

    def delete_by_username(self,name):
        for student in self.cake:
            print(student)
            if student['name'] == name:
                self.cake.remove(student)
                return True,f'{name}删除成功'
        return False,f'{name}不存在'
    def search_by_username(self,name):
        for student in self.cake:
            if student['name'] == name:
                return True,student
        return False,f'{name}不存在'

    def update(self,stu):
        for student in self.cake:
            if student['name'] == stu['name']:
                student.update(stu)
                return True,f''
        return False,f'{stu["name"]}不存在'


db = MysqlDatabases()

if __name__ =='__main__':
    print(db.check_login('admin','123456'))
    print(db.all())