main.py

import os.path

from kivy.core.window import Window
from kivy.properties import NumericProperty
from kivy.clock import Clock

from kivymd.app import MDApp
from kivymd.uix.card import MDCard


Window.size = (428, 926)


class TimerCard(MDCard):
    # set variables to be used
    event = None
    targettime = NumericProperty(0)
    currenttime = NumericProperty(0)
    progressbaropacity = NumericProperty(0)
    startbuttonopacity = NumericProperty(100)

    # update the progressbar, reset when finished and add to score
    def update_bar(self, dt):
        if self.currenttime < self.targettime - 1:
            self.currenttime += 1
        else:
            self.event.cancel()
            self.event = None
            self.progressbaropacity = 0
            self.startbuttonopacity = 100
            self.currenttime = 0
            self.app.score += self.targettime * 1.1
        print(self.currenttime)

    # start updating the progress bar, repeat the update function once every second
    def start_update(self):
        if self.event is None and self.app.score >= self.targettime:
            self.event = Clock.schedule_interval(self.update_bar, 1)
            self.startbuttonopacity = 0
            self.progressbaropacity = 100
            self.app.score -= self.targettime


class ProgressBarsApp(MDApp):
    # score variable
    score = NumericProperty(1)

    # load the savefile to resume progress. autosave every second
    def __init__(self, **kwargs):
        self.cards = []
        super().__init__()
        Clock.schedule_once(self.load, 0)
        Clock.schedule_interval(self.save, 1)

    # function for adding another card
    def make_card(self):
        card = TimerCard()
        card.app = self
        self.cards.append(card)
        self.root.ids.box.add_widget(card)

    # save to file function
    def save(self, _):
        with open("savefile.txt", mode="w") as f:
            savetext = str(self.score) + "\n"
            for card in self.cards:
                savetext += str(card.currenttime) + "," + str(card.targettime) + "\n"
            f.write(savetext)

    # load savefile function
    def load(self, _):
        if os.path.exists("savefile.txt"):
            with open("savefile.txt", mode="r") as f:
                self.score = float(f.readline())
                self.cards = []
                for line in f:
                    current, target = line.split(",")
                    self.make_card()
                    self.cards[-1].currenttime = current
                    self.cards[-1].targettime = target
                    if float(current) > 0:
                        self.score += float((target.strip()))
                        self.cards[-1].start_update()


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