pricedropcheck.py

import bs4
import requests
import urllib.request
import csv
from datetime import datetime
import time
import sendemail

headers = {
        'dnt': '1',
        'upgrade-insecure-requests': '1',
        'user-agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.61 Safari/537.36',
        'accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9',
        'sec-fetch-site': 'same-origin',
        'sec-fetch-mode': 'navigate',
        'sec-fetch-user': '?1',
        'sec-fetch-dest': 'document',
        'referer': 'https://www.amazon.com/',
        'accept-language': 'en-GB,en-US;q=0.9,en;q=0.8',
    }


def get_url():
    url = input("Enter the URL of the product: ")
    response = str(requests.get(url, headers=headers)).split(" ")
    while response[1] != "[200]>":
        print(response[1] + "-Invalid URL. Try Again.")
        url = input("Enter the URL of the product: ")
        response = str(requests.get(url, headers=headers)).split(" ")
    return url

def save_price(price_list):
    field = ['Time', 'Price']
    now = datetime.now()
    dt_string = now.strftime("%d/%m/%Y %H:%M:%S")
    data = [[dt_string, str(price_list)]]
    with open("prices.csv", 'w') as price_file:
        writer = csv.writer(price_file)
        writer.writerow(field)
        writer.writerows(data)

def pricer(url):
    sauce = urllib.request.urlopen(url).read()
    soup = bs4.BeautifulSoup(sauce, "html.parser")
    try:
        price = float(soup.find(class_="a-offscreen").get_text().replace("₹", "").replace(",", ""))
    except AttributeError():
        price = float(soup.find(class_="a-price-whole").get_text().replace(",", "").replace(".", ""))
    return price

def price_alert(price, sender_email, sender_password, receiver_email):
    message = f"The Price of the item you were looking for has now dropped to {price}"
    sendemail.send_email(message, sender_email, sender_password, receiver_email)

def compare(price):
    sender_email = input("Enter the Email from which you want to get notified: ")
    sender_password = input("Enter the password of the Email from which you want to get notified: ")
    receiver_email = input("Enter the email to which you want to get notified(can be the same as your sender email): ")
    with open("prices.csv", "r") as price_file:
        reader = csv.reader(price_file)
        price_list = []
        for row in reader:
            price_list.append(row)
        price_list = price_list[-2]
        old_price = price_list[-1]
        if int(old_price)>price:
            price_alert(price, sender_email, sender_password, receiver_email)
            return True
        return False

def initfile():
    field = ['0', '0']
    data = [['0', '0']]
    with open("prices.csv", 'w') as price_file:
        writer = csv.writer(price_file)
        writer.writerow(field)
        writer.writerows(data)

def main():
    decrease = False
    count = False
    while decrease==False:
        if count == False:
            initfile()
        url = get_url()
        price = pricer(url)
        decrease = compare(price)
        if decrease == False:
            save_price(price)
        count = True
        time.sleep(60*60)

if __name__ == '__main__':
    main()