import json
class MysqlDatabase:
    def __init__(self):
        self.users = json.loads(open('users.json', mode='r',encoding='utf-8').read())
        self.students = json.loads(open('students.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,'登陆成功'
                else:
                    return False,'登录失败，密码错误'
        return False,'登录失败，用户不存在'

    def all(self):
        return self.students

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

    def delete_by_username(self,name):
        for student in self.students:
            print(student)
            if student['name'] == name:
                self.students.remove(student)
                return True,f'{name}删除学生成功'
        return False,f'{name}学生不存在'

    def search_by_username(self,name):
        for student in self.students:
            if student['name'] == name:
                return True, student
        return False,f'{name}学生不存在'

    def update(self,stu):
        for student in self.students:
            if student['name'] == stu['name']:
                student.update(stu)
                return True,f'{stu["name"]} 学生数据修改成功'
        return False,f'{stu["name"]} 学生不存在'




db = MysqlDatabase()



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