Pomodoro GUI

import time
import tkinter as tk
from tkinter import messagebox
import pygame
from datetime import timedelta
# http://www.pillalamarri.in/python/pomodoro-gui/
pygame.mixer.init()
pomo_count = 0
break_count = 0
enable = 0

# path of host file in windows
host_path = r"C:\Windows\System32\drivers\etc\hosts"

# URL of websites to block
block_list = []

# redirecting above URLs to this localhost to ensure blocking
redirect = "127.0.0.1"

def block_websites():
    """
    The function will open the host file and add the block-list websites to
    the file if it is not already present and redirect it to the localhost
    for blocking
    """
    global web_var
    global enable
    global block_list
    global host_path
    url = web_var.get()
    block_list.append(url)
    try:
        # Opening the host file in reading and writing mode
        with open(host_path, 'r+') as h_file:
            content = h_file.read()

            for website in block_list:

                # Website is already blocked
                if website in content:
                    pass

                # To redirect the website to be blocked
                else:
                    h_file.write(redirect + "\t" + website + "\n")

        tk.messagebox.showinfo("Blocked", f"{url} successfully blocked!")
        enable = 1
        web_var.set("")

    except PermissionError:
        tk.messagebox.showinfo("Error", "Run cmd in the admin mode and then try again!")
        web_var.set("")

    except (FileNotFoundError, NameError):
        tk.messagebox.showinfo("Error", "Functionality not supported in your OS!")
        web_var.set("")


def remove_websites():
    """
    The function will unblock the block_list websites by opening the file
    and removing the changes we made before
    """
    global block_list
    global host_path
    try:
        if enable:
            # Opening the host file in reading and writing mode
            with open(host_path, "r+") as file:

                # making each line of file into a list
                content = file.readlines()

                # sets the file pointer at the beginning of the file
                file.seek(0)

                # Traversing through each line of the host file and
                # checking for the websites to be blocked
                for lines in content:
                    if not any(website in lines for website in block_list):
                        file.write(lines)
                        
                # Truncating the file to its original size
                file.truncate()

            block_list.clear()
            enable = 0
    except:
        pass
    finally:
        pass

# http://www.pillalamarri.in/python/pomodoro-gui/
def blocker():
    """
    The function asks input from user to block websites for high focus mode.
    """
    global enable
    global popup_4
    popup_4 = tk.Toplevel(root)
    popup_4.title("Website Blocker!")
    popup_4.geometry("360x220")
    popup_4.config( bg = 'DodgerBlue4')

    global block_list
    global web_var
    web_var=tk.StringVar()

    pass_label = tk.Label(popup_4, text = 'Enter URL to block:', font = ('Arial',12, 'bold'), bg = 'DodgerBlue4', fg = 'white')
    pass_entry = tk.Entry(popup_4, textvariable = web_var, font = ('Arial',12, 'bold'))

    sub_btn = tk.Button(popup_4, text = 'Block', font = ('Arial',12, 'bold'), command = block_websites, bg='gold', activebackground='yellow')

    text_to_put = '*Supported for windows ONLY\n*You can add multiple urls\n*Don\'t forget to unblock after'

    instructions = tk.Label(popup_4, text = text_to_put, font = ('Arial',12, 'bold'), justify='left', bg = 'sky blue')

    unblock_btn = tk.Button(popup_4, text = 'Unblock all', font = ('Arial',12, 'bold'), command = remove_websites, state='disabled', width = 23, height = 2, bg='gold', activebackground='yellow')

    if enable:
        unblock_btn.config(state='normal')

    pass_label.place(x=25, y=10)
    pass_entry.place(x=25, y=34)
    sub_btn.place(x=255, y=30)
    instructions.place(x=25, y=80)
    unblock_btn.place(x=50, y=150)


def break_timer():
    """
    5 min timer popup window acting as a callback function to the break timer button
    """
    global enable
    global popup_2
    popup_2 = tk.Toplevel(root)
    popup_2.title("Break Timer!")
    popup_2.geometry("370x120")
    round = 0

    try:
        # Creating a continous loop of text of time on the screen for 25 mins
        t = 5*60
        while t>-1:
            minute_count = t // 60
            second_count = t % 60
            timer = '{:02d}:{:02d}'.format(minute_count, second_count)
            time_display = tk.Label(popup_2, text = timer, bg = 'DodgerBlue4', fg = 'white', font = ('STIX', 90, 'bold'))
            time_display.place(x=0,y=0)
            popup_2.update()
            time.sleep(1)
            t -= 1
    except:
        pass    
    
    # Setting up an alarm sound and popup window to let user know when the time is up
    if t == -1:
        tk.messagebox.showinfo("Time's up!", "Break is over!\nTime to get to work!")
        popup_2.destroy()
        global break_count
        pygame.mixer.music.load("./Pomodoro_GUI/beep.wav")
        pygame.mixer.music.play(loops=1)
        break_count += 1
    

def show_report():
    """
    The function acts as a callback for show report button and shows the report the hours 
    of work they have put in. 
    """
    global popup_3
    popup_3 = tk.Toplevel(root)
    popup_3.title("Report")
    popup_3.geometry("370x170")
    popup_3.config( bg = 'DodgerBlue4')

    pomo_time = str(timedelta(minutes=pomo_count*25))[:-3]
    break_time = str(timedelta(minutes=pomo_count*5))[:-3]
    tk.Label(popup_3, text=f"Number of Pomodoros completed: {pomo_count}", justify=tk.LEFT, bg = 'DodgerBlue4', fg = 'white', font=('Arial',12,'bold')).place(x = 10, y = 10)
    tk.Label(popup_3, text=f"Number of breaks completed: {break_count}", justify=tk.LEFT, bg = 'DodgerBlue4', fg = 'white', font=('Arial',12,'bold')).place(x = 10, y = 50)
    tk.Label(popup_3, text=f"Hours of work done: {pomo_time} hrs", justify=tk.LEFT,  bg = 'DodgerBlue4', fg = 'white', font=('Arial',12,'bold')).place(x = 10, y = 90)
    tk.Label(popup_3, text=f"Hours of break taken: {break_time} hrs", justify=tk.LEFT,  bg = 'DodgerBlue4', fg = 'white', font=('Arial',12,'bold')).place(x = 10, y = 130)

# http://www.pillalamarri.in/python/pomodoro-gui/
def pomodoro_timer():
    """
    25 min timer popup window acting as a callback function to the work timer button
    """
    global popup_1
    popup_1 = tk.Toplevel(root)
    popup_1.title("Work Timer!")
    popup_1.geometry("370x120")
    round = 0

    try:
        # Creating a continous loop of text of time on the screen for 25 mins
        t = 25*60
        while t>-1:
            minute_count = t // 60
            second_count = t % 60
            timer = '{:02d}:{:02d}'.format(minute_count, second_count)
            time_display = tk.Label(popup_1, text = timer, bg = 'DodgerBlue4', fg = 'white', font = ('STIX', 90, 'bold'))
            time_display.place(x=0,y=0)
            popup_1.update()
            time.sleep(1)
            t -= 1
    except:
        pass    
    
    # Setting up an alarm sound and popup window to let user know when the time is up
    if t == -1:
        tk.messagebox.showinfo("Time's up!", "Pomodoro completed successfully!\nYou deserve a break!")
        popup_1.destroy()
        global pomo_count
        pomo_count += 1
        pygame.mixer.music.load("./Pomodoro_GUI/beep.wav")
        pygame.mixer.music.play(loops=0)


def main():
    """
    This function produces the main screen of the Pomodoro timer with options to 
    select the 25mins work timer, 5mins break timer, block websites for extra focus and 
    another option to see the statistics of the time you've put in the work
    """
    # Creating the root window (main screen)
    global root
    root = tk.Tk()
    root.title('Timer')
    root.geometry('470x608')

    # Setting the screen background
    bg = tk.PhotoImage(file = "./Pomodoro_GUI/bg.png")
    label1 = tk.Label( root, image = bg)
    label1.place(x = 0, y = 0)

    intro1 = tk.Label(root, text = 'POMODORO TIMER', bg = 'snow', fg = 'maroon', font = ('Arial', 25, 'bold'))
    intro1.place(x=100, y=100)

    blocker_btn = tk.Button(root, text = 'WEBSITE BLOCKER', command = blocker, font = ('Arial', 12, 'bold'), bg='gold', activebackground='yellow', height = 3, width = 25)
    blocker_btn.place(x=100, y=150)

    start_btn = tk.Button(root, text = 'START WORK TIMER', command = pomodoro_timer, font = ('Arial', 12, 'bold'), bg='gold', activebackground='yellow', height = 3, width = 25)
    start_btn.place(x=100, y=250)

    break_btn = tk.Button(root, text = 'START BREAK TIMER', command = break_timer, font = ('Arial', 12, 'bold'), bg='gold', activebackground='yellow', height = 3, width = 25)
    break_btn.place(x=100, y=350)

    report_btn = tk.Button(root, text = 'SHOW REPORT', command = show_report, font = ('Arial', 12, 'bold'), bg='gold', activebackground='yellow', height = 3, width = 25)
    report_btn.place(x=100, y=450)

    root.mainloop()


if __name__ == '__main__':
	main()

# http://www.pillalamarri.in/python/pomodoro-gui/