2022.8.13.

import sys
from PyQt5.QtWidgets import QApplication, QWidget, QPushButton, QVBoxLayout, QGridLayout, QLineEdit, QLabel, QHBoxLayout, QDialog
from PyQt5.QtGui import *
from PyQt5.QtCore import Qt
import os

class MyApp(QWidget):

    def __init__(self):
        super().__init__()
        self.initUI()
        v = open('./data/number.txt')
        self.number = int(v.readline())
        v.close()
        self.num = self.number
        var = open('./data/ID.txt')
        self.ID = var.readlines()
        for line in self.ID:
            line = line.strip()
        var.close()
        var1 = open('./data/PW.txt')
        self.PW = var1.readlines()
        for line1 in self.PW:
            line1 = line1.strip()
        var1.close()

    def initUI(self):
        self.vbox2 = QVBoxLayout()

        self.dialog = QDialog()

        self.vbox = QVBoxLayout()
        self.grid = QGridLayout()
        self.hbox = QHBoxLayout()
        grid = QGridLayout()

        lblID = QLabel('아이디')
        grid.addWidget(lblID, 0, 0)

        lblPW = QLabel('비밀번호')
        grid.addWidget(lblPW, 1, 0)

        self.identity = QLineEdit()
        grid.addWidget(self.identity, 0, 1)

        self.password = QLineEdit()
        grid.addWidget(self.password, 1, 1)

        self.grid.addLayout(grid, 0, 0)

        login = QPushButton('로그인', self)
        login.setCheckable(False)
        login.toggle()
        self.hbox.addWidget(login)

        join = QPushButton('회원가입', self)
        join.setCheckable(False)
        join.toggle()
        join.clicked.connect(self.log)
        join.setStyleSheet('font: 8pt')
        join.setMaximumWidth(55)
        self.hbox.addWidget(join)

        self.grid.addLayout(self.hbox, 1, 0)

        self.setLayout(self.grid)

        self.setWindowTitle('로그인')
        self.setGeometry(300, 300, 300, 200)
        self.show()

    def log(self):
        if self.number == 0:
            self.ID.append(self.identity.text())
            self.PW.append(self.password.text())
            self.number = self.number + 1
        else:
            for i in range(self.number):
                if self.ID[i] == self.identity.text():
                    self.dlg()
                    break
                elif i == self.number - 1:
                    self.ID.append(self.identity.text())
                    self.PW.append(self.password.text())
                    self.number += 1
                    break
        self.identity.setText('')
        self.password.setText('')

        var1 = open("./data/ID.txt", 'w')
        for i in range(self.number):
            var1.write(self.ID[i]+'\n')
        var1.write('\n')
        var1.close()

        var2 = open("./data/PW.txt", 'w')
        for i in range(self.number):
            var2.write(self.PW[i]+'\n')
        var2.write('\n')
        var2.close()

        v = open('./data/number.txt', 'w')
        v.write(str(self.number))
        v.close()

        v1 = open('./data/information.txt','w')
        for i in range(self.number):
            v1.write(self.ID[i]+'   '+self.PW[i])
            v1.write('\n')
        v1.close()

    def dlg(self):
        self.label = QLabel('이미 사용된 아이디 입니다', self.dialog)
        font1 = self.label.font()
        font1.setPointSize(13)
        self.label.setFont(font1)
        self.label.move(40, 70)
        closebtn = QPushButton('확인', self.dialog)
        closebtn.move(180, 140)
        closebtn.clicked.connect(self.Close)

        self.dialog.setWindowTitle('로그인')
        self.dialog.resize(270, 180)
        self.dialog.show()

    def Close(self):
        self.dialog.close()



if __name__ == '__main__':
    app = QApplication(sys.argv)
    ex = MyApp()
    sys.exit(app.exec_())

#파일: ID.txt, PW.txt, number.txt: 0, information.txt