checker_book.py

import time

import logger
from bots import bot
from databases.database import Database
from parsers import parser_manager


class CheckerBook:
    @staticmethod
    def check_book():
        """
        This method checks book discounts every 36 minutes and removes books from which no one is subscribed.
        If there is a discount, then it calls the method of notifying subscribers.
        """

        parser = parser_manager.ParserManager()
        bot_ = bot.Bot()
        while True:
            database = Database()
            books = database.get_books()
            database.delete_empty_subscriptions()

            for book in books:
                try:
                    book_detail = parser.parsing_book(book['link'])

                    if book_detail['price'] != book['price']:
                        database.change_price(book['link'], book_detail['price'])

                        if book_detail['price'] < book['price']:
                            sale = 100 - int(book_detail['price'] / book['price'] * 100)
                            for follower in book['followers']:
                                if database.check_service(follower):
                                    bot_.send_notification(follower, book_detail, sale)
                except AttributeError as ae:
                    logger.show_error(system="Book24", error=repr(ae))

            database.__del__()
            time.sleep(2200)