day04-decorator

# Author: 刘佳赐-Isabelle

# Email: jiaci.liu@gmail.com

'''

练习题：

1、整理装饰器的形成过程，背诵装饰器的固定格式

2、编写装饰器,在每次执行被装饰函数之前打印一句’每次执行被装饰函数之前都得先经过这里,这里根据需求添加代码’

3、编写装饰器,在每次执行被装饰函数之后打印一句’每次执行完被装饰函数之后都得先经过这里,这里根据需求添加代码’

4、编写装饰器,在每次执行被装饰函数之前让用户输入用户名,密码,给用户三次机会,登录成功之后,才能访问该函数.

5、编写装饰器，为多个函数加上认证的功能（用户的账号密码来源于文件,只支持单用户的账号密码,给用户三次机会），要求登录成功一次，后续的函数都无需再输入用户名和密码

6、编写装饰器，为多个函数加上认证的功能（用户的账号密码来源于文件,可支持多账号密码），要求登录成功一次（给三次机会），后续的函数都无需再输入用户名和密码。

7、给每个函数写一个记录日志的功能，

'''

'''

1、整理装饰器的形成过程，背诵装饰器的固定格式

'''

# def wrapper(f):

#     def inner(*args, **kwargs):

#         ret = f(*args, **kwargs)

#         return ret

#     return inner

'''

2、编写装饰器,在每次执行被装饰函数之前打印一句’每次执行被装饰函数之前都得先经过这里,这里根据需求添加代码’

'''

# def wrapper2(f):

#     def inner2(*args, **kwargs):

#         print('每次执行被装饰函数之前都得先经过这里,这里根据需求添加代码')

#         ret = f(*args, **kwargs)

#         return ret

#     return inner2

'''

3、编写装饰器,在每次执行被装饰函数之后打印一句’每次执行完被装饰函数之后都得先经过这里,这里根据需求添加代码’

'''

# def wrapper3(f):

#     def inner(*args, **kwargs):

#         ret = f(*args, **kwargs)

#         print('每次执行完被装饰函数之后都得先经过这里,这里根据需求添加代码')

#         return ret

#     return inner

'''

4、编写装饰器,在每次执行被装饰函数之前让用户输入用户名,密码,给用户三次机会,登录成功之后,才能访问该函数.

'''

# # Method 1

# def wrapper41(f):

#     def inner(*args, **kwargs):

#         '''

#         Function to check user name and password

#         :param args:

#         :param kwargs:

#         :return:

#         '''

#         userinfo = []

#         username_list = []

#         with open('jd_userinfo', encoding='utf-8') as file:

#             for line in file:

#                 username_list.append(line.strip().split('|')[0])

#                 userinfo.append(line.strip().split('|'))

#

#         username = input('Please input your username:').strip()

#

#         if username in username_list:

#             password = input('Please input your password:').strip()

#             for times in range(0, 3):

#                 if [username, password] in userinfo and times < 2:

#                     ret = f(*args, **kwargs)

#                     return ret

#                 elif [username, password] not in userinfo and times < 2:

#                     times += 1

#                     print('Invalid Password, left %d times!' % (3-times))

#                     password =input('Please input your password again:').strip()

#                 elif [username, password] not in userinfo and times >= 2:

#                     print('Invalid Password, tried 3 times, your account has been locked!!')

#         elif username not in username_list:

#             print('Invalid username!')

#     return inner

#

# # Method 2

# def wrapper42(f):

#     def inner(*args, **kwargs):

#         times = 0  # tried times

#         userinfo = []

#         username_list = []

#         with open('jd_userinfo', encoding='utf-8') as file:

#             for line in file:

#                 username_list.append(line.strip().split('|')[0])

#                 userinfo.append(line.strip().split('|'))

#

#         username = input('Please input your username:').strip()

#

#         if username in username_list:

#             password = input('Please input your password:').strip()

#             while 1:

#                 if [username, password] in userinfo and times < 2:

#                     ret = f(*args, **kwargs)

#                     return ret

#                 elif [username, password] not in userinfo and times < 2:

#                     times += 1

#                     print('Invalid Password, left %d times!' % (3-times))

#                     password =input('Please input your password again:').strip()

#                 elif [username, password] not in userinfo and times >= 2:

#                     print('Invalid Password, tried 3 times, your account has been locked!!')

#                     break

#

#         elif username not in username_list:

#             print('Invalid username!')

#     return inner

#

# @wrapper41

# # @wrapper42

# def f():

#     print(111)

#

# f()

'''

5、编写装饰器，为多个函数加上认证的功能（用户的账号密码来源于文件,只支持单用户的账号密码,给用户三次机会），

要求登录成功一次，后续的函数都无需再输入用户名和密码

'''

# login_status = {

#     'username': None,

#     'status': False,

# }

#

# def wrapper(f):

#     def inner(*args, **kwargs):

#         '''

#         Function to check login status, if not logged in, check user name and password to login;

#         once logged in, no need to verify status for further functions!

#         :param args:

#         :param kwargs:

#         :return:

#         '''

#         if login_status['status']:

#             ret = f(*args, **kwargs)

#             return ret

#         else:

#             userinfo = []

#             username_list = []

#             with open('jd_userinfo', encoding='utf-8') as file:

#                 for line in file:

#                     username_list.append(line.strip().split('|')[0])

#                     userinfo.append(line.strip().split('|'))

#

#             username = input('Please input your username:').strip()

#

#             if username in username_list:

#                 password = input('Please input your password:').strip()

#                 for times in range(0, 3):

#                     if [username, password] in userinfo and times < 2:

#                         ret = f(*args, **kwargs)

#                         login_status['status'] = True

#                         login_status['username'] = username

#                         return ret

#                     elif [username, password] not in userinfo and times < 2:

#                         times += 1

#                         print('Invalid Password, left %d times!' % (3-times))

#                         password =input('Please input your password again:').strip()

#                     elif [username, password] not in userinfo and times >= 2:

#                         print('Invalid Password, tried 3 times, your account has been locked!!')

#             elif username not in username_list:

#                 print('Invalid username!')

#     return inner

#

# @wrapper

# def func1():

#     print(111)

#

# @wrapper

# def func2():

#     print(222)

#

# @wrapper

# def func3():

#     print(333)

#

# func1()

# func2()

# func3()

'''

6、编写装饰器，为多个函数加上认证的功能（用户的账号密码来源于文件,可支持多账号密码），

要求登录成功一次（给三次机会），后续的函数都无需再输入用户名和密码。

'''

# login_status = {

#     'TM_username': None,

#     'TM_status': False,

#     'JD_username': None,

#     'JD_status': False,

# }

#

#

# def account(Flag):

#     def wrapper(f):

#         def inner(*args, **kwargs):

#             '''

#             Function to check login status, if not logged in (available to check multiple accounts),

#             check user name and password to login;

#             once logged in, no need to verify status for further functions!

#             :param args:

#             :param kwargs:

#             :return:

#             '''

#             account_book = Flag.lower()+'_userinfo'

#             account_username = Flag+'_username'

#             account_status = Flag+'_status'

#

#             if login_status[account_status]:

#                 ret = f(*args, **kwargs)

#                 return ret

#             else:

#                 userinfo = []

#                 username_list = []

#

#                 with open(account_book, encoding='utf-8') as file:

#                     for line in file:

#                         username_list.append(line.strip().split('|')[0])

#                         userinfo.append(line.strip().split('|'))

#

#                 username = input('Please input your %s account username:' % Flag).strip()

#

#                 if username in username_list:

#                     password = input('Please input your %s account password:' % Flag).strip()

#                     for times in range(0, 3):

#                         if [username, password] in userinfo and times < 2:

#                             login_status[account_status] = True

#                             login_status[account_username] = username

#                             ret = f(*args, **kwargs)

#                             return ret

#                         elif [username, password] not in userinfo and times < 2:

#                             times += 1

#                             print('Invalid Password, left %d times!' % (3-times))

#                             password =input('Please input your password again:').strip()

#                         elif [username, password] not in userinfo and times >= 2:

#                             print('Invalid Password, tried 3 times, your account has been locked!!')

#                 elif username not in username_list:

#                     print('Invalid username!')

#         return inner

#     return wrapper

#

# @account('TM')

# def func1():

#     print(111)

#

# @account('JD')

# def func2():

#     print(222)

#     print(login_status['JD'+'_username'])

#

# @account('TM')

# def func3():

#     print(333)

#

# func1()

# func2()

# func3()

'''

7、给每个函数写一个记录日志的功能，

'''

# import time

# struct_time = time.localtime()

#

# def wrapper(f):

#     def inner(*args, **kwargs):

#         ret = f(*args, **kwargs)

#         with open('diary', mode='a', encoding='utf-8') as file:

#             file.write('Function {} was conducted at {}'.format(str(f)[10:str(f).index('at')-1],

#                                                                 time.strftime("%Y-%m-%d %H:%M:%S", struct_time)))

#         return ret

#     return inner

#

# @wrapper

# def func():

#     print(1)

#

# func()

"""

功能要求：每一次调用函数之前，要将函数名称，时间节点记录到log的日志中。

所需模块：

    import time

    struct_time = time.localtime()

    print(time.strftime("%Y-%m-%d %H:%M:%S",struct_time))

1)，启动程序，首页面应该显示成如下格式：

    欢迎来到博客园首页

    1:请登录

    2:请注册

    3:文章页面

    4:日记页面

    5:评论页面

    6:收藏页面

    7:注销

    8:退出程序

2)，用户输入选项，3~6选项必须在用户登录成功之后，才能访问成功。

3)，用户选择登录，用户名密码从register文件中读取验证，三次机会，

        没成功则结束整个程序运行，成功之后，可以选择访问3~6项，访问页面之前，

        必须要在log文件中打印日志，日志格式为-->用户:xx 在xx年xx月xx日 执行了 %s函数，

        访问页面时，页面内容为：欢迎xx用户访问评论（文章，日记，收藏）页面

4)，如果用户没有注册，则可以选择注册，注册成功之后，可以自动完成登录，然后进入首页选择。

5)，注销用户是指注销用户的登录状态，使其在访问任何页面时，必须重新登录。

"""

# import time

# struct_time = time.localtime()

#

#

# login_status = {

#     'TM_username': None,

#     'TM_status': False,

#     'JD_username': None,

#     'JD_status': False,

# }

#

# default_page = '''

# 欢迎来到博客园首页

#     1:请登录

#     2:请注册

#     3:文章页面

#     4:日记页面

#     5:评论页面

#     6:收藏页面

#     7:注销

#     8:退出程序

# '''

# def account(Flag='TM'):

#     def login_check(func):

#         '''

#         Decoration function

#         :param func: function to be decorated

#         :return: func

#         '''

#         def inner(*args, **kwargs):

#             '''

#             decoration function

#             :param args:

#             :param kwargs:

#             :return: decorated function

#             '''

#             account_book = Flag.lower()+'_userinfo'

#             account_username = Flag+'_username'

#             account_status = Flag+'_status'

#             account_diary = Flag+'_diary'

#

#             if login_status[account_status]:

#                 ret = func(*args, **kwargs)

#

#                 with open(account_diary, mode='a', encoding='utf-8') as file:

#                     file.write('用户:{}在{}执行了{}\n'.format(login_status[account_username],

#                                                             time.strftime("%Y-%m-%d %H:%M:%S", struct_time),

#                                                             str(func)[10:str(func).index('at') - 1]))

#                 return ret

#             else:

#                 print("Please login first!")

#

#                 # check user name and password

#                 username = input("Please input your username:").strip()

#

#                 # make a list of saved username and corresponding password

#                 # TODO: is this necessary to create a new list?

#                 username_list = []  # list of user name

#                 userinfo_list = []  # list of user name and corresponding password

#                 with open(account_book, encoding="utf-8") as file:

#                     for line in file:

#                         username_list.append(line.strip().split("|")[0])  # TODO:any simpler expression?

#                         userinfo_list.append(line.strip().split("|"))     # TODO:any simpler expression?

#                 if username in username_list:

#                     password = input('Please input your password:').strip()

#                     for times in range(0, 3):

#                         if [username, password] in userinfo_list:

#                             login_status[account_username] = username

#                             login_status[account_status] = True

#                             ret = func(*args, **kwargs)

#

#                             with open(account_diary, mode='a', encoding='utf-8') as file:

#                                 file.write('用户:{}在{}执行了{}\n'.format(login_status[account_username],

#                                                                     time.strftime("%Y-%m-%d %H:%M:%S", struct_time),

#                                                                     str(func)[10:str(func).index('at') - 1]))

#                             return ret

#                         elif [username, password] not in userinfo_list and times < 2:

#                             times += 1

#                             print('Invalid password, left %d times!' % (3 - times))

#                             password = input('Please input your password again:')

#                         elif [username, password] not in userinfo_list and times >= 2:

#                             print('Invalid password, failed for three times!! You account has been locked!')

#                 elif username not in username_list:

#                     print("Unregistered username, please register!")

#                     register()

#         return inner

#     return login_check

#

#

# @account('JD')

# def register():

#     global operation

#

#     # check whether the username is available (occupied or not)

#     username_check = []  # TODO: is this necessary to create a new list?

#

#     with open("jd_userinfo", "r+", encoding="utf-8") as file:

#         for line in file:

#             username_check.append(line.strip().split()[0])

#         username = input("Please set your username:").strip()

#         while 1:

#             if username not in username_check:

#                 password = input("Please set your password:")

#                 file.write("{}|{}\n".format(username, password))

#

#                 login_status['JD'+'_status'] = True

#                 login_status['JD'+'_username'] = username

#                 print(default_page)

#

#                 with open('JD' + '_diary', mode='a', encoding='utf-8') as file2:

#                     file2.write('用户:{}在{}执行了{}\n'.format(login_status['JD' + '_username'],

#                                                        time.strftime("%Y-%m-%d %H:%M:%S", struct_time),

#                                                        str(register)[10:str(register).index('at') - 1]))

#                 operation = input('Please select your operation(1-8):')

#                 dic[int(operation)]()

#

#             elif username in username_check:

#                 print("Username has been taken, please reset your username!!")

#                 username = input("Please set your username again:").strip()

#

# @account('JD')

# def login():

#     print(default_page)

#     operation = int(input('Please select your operation(1-8):'))

#     if operation == 1:

#         print('You have already logged in!!')

#         operation = int(input('Please select your operation(2-8):'))

#     else:

#         dic[operation]()

#

#

# @account('JD')

# def page():

#     print("欢迎用户%s访问文章页面" % login_status['JD'+'_username'])

#     operation = int(input('Please select your operation(1-8):'))

#     dic[operation]()

#

# @account('JD')

# def diary():

#     print("欢迎用户%s访问日志页面" % login_status['JD'+'_username'])

#     with open('JD'+'_diary', encoding='utf-8') as file:

#         for line in file:

#             print(line.strip('\n'))

#     operation = int(input('Please select your operation(1-8):'))

#     dic[operation]()

#

# @account('JD')

# def comment():

#     print("欢迎用户%s访问评论页面" % login_status['JD'+'_username'])

#     operation = int(input('Please select your operation(1-8):'))

#     dic[operation]()

#

# @account('JD')

# def save():

#     print("欢迎用户%s访问收藏页面" % login_status['JD'+'_username'])

#     operation = int(input('Please select your operation(1-8):'))

#     dic[operation]()

#

# @account('JD')

# def logout():

#     print("账号已退出！")

#

# @account('JD')

# def quit_operation():

#     pass

#

# dic = {

#     1: login,

#     2: register,

#     3: page,

#     4: diary,

#     5: comment,

#     6: save,

#     7: logout,

#     8: quit_operation,

# }

#

#

# if __name__ == '__main__':

#     print(default_page)

#     operation = int(input('Please select your operation(1-8):'))

#     dic[operation]()

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