from PyQt5.QtWidgets import QWidget,QLineEdit,QLabel,QPushButton,QGridLayout,QHBoxLayout,QGroupBox,QComboBox,QMessageBox
import pickle,smtplib,os
from email import encoders
from email.header import Header
from email.utils import parseaddr,formataddr
from email.mime.text import MIMEText
#定義email窗口
class email_window(QWidget):
    def __init__(self):
        super().__init__()
        self.email_stmp = QLineEdit()
        self.email_name = QLineEdit()
        self.email_user = QLineEdit()
        self.email_password = QLineEdit()
        self.email_password.setEchoMode(QLineEdit.Password)
        self.email_test = QLineEdit()

        self.dir_email = {}
        self.list_users = []

        self.email_users = QLineEdit()
        self.email_suers_combobox = QComboBox()
        self.initUI()
        self.initEmail()
    def initUI(self):

        stmp_label = QLabel('SMTP服務器:')
        name_label = QLabel('地區/單位:')
        user_label = QLabel('郵箱賬號:')
        password_label = QLabel('郵箱密碼:')
        test_label = QLabel('測試收件人:')
        email_test_button = QPushButton('發送測試郵件')
        email_test_button.clicked.connect(self.email_test_fun)
        email_input_button = QPushButton('保存郵箱配置')
        email_input_button.clicked.connect(self.email_save)
        email_info_group = QGroupBox('郵箱配置')
        email_info_grid = QGridLayout()
        email_info_grid.addWidget(stmp_label,0,0)
        email_info_grid.addWidget(self.email_stmp,0,1)
        email_info_grid.addWidget(name_label,1,0)
        email_info_grid.addWidget(self.email_name,1,1)
        email_info_grid.addWidget(user_label,2,0)
        email_info_grid.addWidget(self.email_user,2,1)
        email_info_grid.addWidget(password_label,3,0)
        email_info_grid.addWidget(self.email_password,3,1)
        email_info_grid.addWidget(test_label,4,0)
        email_info_grid.addWidget(self.email_test,4,1)
        email_info_grid.addWidget(email_test_button,5,0)
        email_info_grid.addWidget(email_input_button,5,1)
        email_info_group.setLayout(email_info_grid)

        email_users_group = QGroupBox('收件人')
        email_users_label = QLabel('郵箱:')
        email_users_combobox_label = QLabel('郵箱列表:')
        email_users_input_button = QPushButton('添加')
        email_users_delete_button = QPushButton('刪除')
        email_users_input_button.clicked.connect(self.email_users_save)
        email_users_delete_button.clicked.connect(self.email_users_delete)
        email_users_grid = QGridLayout()
        email_users_grid.addWidget(email_users_label,0,0)
        email_users_grid.addWidget(self.email_users,0,1)
        email_users_grid.addWidget(email_users_input_button,0,2)
        email_users_grid.addWidget(email_users_combobox_label,1,0)
        email_users_grid.addWidget(self.email_suers_combobox,1,1)
        email_users_grid.addWidget(email_users_delete_button,1,2)
        email_users_group.setLayout(email_users_grid)


        hbox = QHBoxLayout()
        hbox.addWidget(email_info_group)
        hbox.addWidget(email_users_group)
        self.setLayout(hbox)
    #檢查郵箱信息
    def check_info(self):
        if self.email_stmp.text().strip() == '' or self.email_user.text().strip() == '' or self.email_name.text().strip() == '' or self.email_password.text().strip() == '':
            QMessageBox.warning(self,'提示','SMTP服務器,地區/單位,郵箱賬號,郵箱密碼\n不能為空.')
            return 1
        return 0
    #格式化
    def _format_addr(self,s):
        name, addr = parseaddr(s)
        return formataddr((Header(name, 'utf-8').encode(), addr))
    #郵件測試按鈕
    def email_test_fun(self):
        if self.check_info() == 1:
            return
        if self.email_test.text().strip() == '':
            QMessageBox.warning(self,'提示','請先輸入測試收件人.')
            return
        try:
            msg = MIMEText('測試郵件.', 'plain', 'utf-8')
            msg['From'] = self._format_addr('%s<%s>'%(self.email_name.text().strip(),self.email_user.text().strip()))
            msg['To'] = ','.join([self.email_test.text().strip()])
            msg['Subject'] = Header('測試郵件', 'utf-8').encode()
            server = smtplib.SMTP(self.email_stmp.text().strip(), 25)
            server.set_debuglevel(1)
            server.login(self.email_user.text().strip(), self.email_password.text().strip())
            server.sendmail(self.email_user.text().strip(), [self.email_test.text().strip()], msg.as_string())
            server.quit()
            QMessageBox.warning(self,'成功','郵件已發送,請查收.')
        except Exception as error:
            print(repr(error))
            QMessageBox.warning(self,'錯誤','郵件發送失敗.')
    #郵件信息保存
    def email_save(self):
        if self.check_info() == 1:
            return
        self.dir_email['stmp'] = self.email_stmp.text().strip()
        self.dir_email['name'] = self.email_name.text().strip()
        self.dir_email['user'] = self.email_user.text().strip()
        self.dir_email['password'] = self.email_password.text().strip()
        with open('.//DATA//EMAILinfo.pik','wb') as email_file:
            pickle.dump(self.dir_email,email_file)
        QMessageBox.about(self,'提示','郵件信息保存成功.')
    #初始化郵件信息
    def initEmail(self):
        try:
            if os.path.exists('.//DATA//EMAILinfo.pik'):
                with open('.//DATA//EMAILinfo.pik','rb') as e_file:
                    self.dir_email = pickle.load(e_file)
                    self.email_user.setText(self.dir_email['user'])
                    self.email_password.setText(self.dir_email['password'])
                    self.email_name.setText(self.dir_email['name'])
                    self.email_stmp.setText(self.dir_email['stmp'])
            if os.path.exists('.//DATA//EMAILlist.pik'):
                with open('.//DATA//EMAILlist.pik','rb') as file:
                    self.list_users = pickle.load(file)
                    x = 0
                    for line in self.list_users:
                        self.email_suers_combobox.insertItem(x, line)
                        x = x + 1
        except Exception as error:
            return
    #保存用戶
    def email_users_save(self):
        if self.email_users.text().strip() == '':
            QMessageBox.warning(self,'提示','請先輸入郵件賬號.')
            return
        for line in self.list_users:
            if line == self.email_users.text().strip():
                QMessageBox.warning(self,'提示','用戶已存在.')
                return
        self.email_suers_combobox.insertItem(len(self.list_users),self.email_users.text().strip())
        self.list_users.append(self.email_users.text().strip())
        with open('.//DATA//EMAILlist.pik','wb') as file:
            pickle.dump(self.list_users,file)
        self.email_users.setText('')
    #刪除用戶
    def email_users_delete(self):
        if self.email_suers_combobox.currentText() == '':
            QMessageBox.about(self,'提示','沒有可刪除的收件人.')
            return
        x = 0
        for line in self.list_users:
            if line == self.email_suers_combobox.currentText():
                del self.list_users[x]
                self.email_suers_combobox.removeItem(x)
                break
            x = x + 1
        with open('.//DATA//EMAILlist.pik','wb') as file:
            pickle.dump(self.list_users,file)

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