main.py

from kivy.app import App
from kivy.lang import Builder
from kivy.uix.screenmanager import ScreenManager, Screen
import json, glob, random
from hoverable import HoverBehavior
from kivy.uix.image import Image
from kivy.uix.behaviors import ButtonBehavior
from datetime import datetime
from pathlib import Path


Builder.load_file("design.kv")

class LoginScreen(Screen): #class with the same name as the rules in the .kv file
    def sign_up(self):
        self.manager.current ="sign_up_screen" #switch from the login screen to the sig up screen

    def login(self, uname,pword):
        with open("users.json") as file:
            users = json.load(file)
        if uname in users and users[uname]['password'] == pword:
            self.manager.current = "loging_screen_success"
        else:
            self.ids.login_wrong.text="Wrong username or password!"

    def forget_password(self):
        # self.manager.transition.direction="right"
        self.manager.current = "forget_password_screen"


class RootWidget(ScreenManager):
    pass

class SignUpScreen(Screen): #any action in the sign up screen it is connected to this class
    def add_user(self, uname, pword):
        with open("users.json") as file:
            users=json.load(file)
        users[uname]={'username': uname, 'password': pword,
                    'created': datetime.now().strftime("%Y-%m-%d %H:%M:%S")}

        with open("users.json", 'w') as file:
            json.dump(users, file)
        self.manager.current ="sign_up_screen_success"

class ForgottenPassword(Screen):
    def check_password(self, user):
        # self.manager.transition.direction="left"
        with open("users.json") as file:
            users=json.load(file)
        if user in users:
            passw = users[user]['password']
            self.ids.show_password.text=passw
        else:
            self.ids.show_password.text="Username invalid"
    def forgot_password_back(self):
        self.manager.transition.direction="right"
        self.manager.current="login_screen"


class SignUpScreenSuccess(Screen):
    def login_back(self):
        self.manager.transition.direction="right"
        self.manager.current="login_screen"

class LoginScreenSuccess(Screen):
    def log_out(self):
        self.manager.transition.direction="right"
        self.manager.current="login_screen"

    def get_quote(self, feel):
        feel = feel.lower()
        available_feeeling = glob.glob("quotes/*txt")
        available_feeeling = [Path(filename).stem for filename
                                in available_feeeling]
        if feel in available_feeeling:
            with open(f"quotes/{feel}.txt") as file:
                quotes = file.readlines()
            self.ids.quote.text = random.choice(quotes)
        else:
            self.ids.quote.text = "Sorry, feeling not supportet yet!"

class ImageButton(ButtonBehavior,HoverBehavior, Image):
    pass

class MainApp(App):
    def build(self):
        return RootWidget()

if __name__ =="__main__":
    MainApp().run()