A script for checking availability of the RTX 3080FE on nvidia.com on 2020-10-08; uses selenium and firefox; sends a text message via twilio if stock found; edited to ignore the best buy stock option

3080FE_check_nvidia_stock_2020-10-08.py

#!/usr/bin/env python
"""
MIT License

Copyright (c) 2020 Erich Beyer

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

Requirements:
Python version 3.6 or greater
python library selenium
python library twilio
twilio account, auth_token, and phone number
geckodriver and firefox compatible with selenium (https://firefox-source-docs.mozilla.org/testing/geckodriver/Support.html)

How to:
1. fill out defines below
2. install requirements
3. execute script: python 3080FE_check_nvidia_stock_2020-10-08.py

"""
import selenium
from selenium import webdriver
import sys
from time import time

# FILL OUT THIS SECTION
TWILIO_ACCOUNT_SID = ''
TWILIO_AUTH_TOKEN = ''
# phone number to send sms to
PHONE_NUM = ''
# from number in your twilio account
TWILIO_NUM = ''
# Specify your firefox binary only if the one provided by your
# system's package manager does not support your geckodriver
PATH_TO_FIREFOX = ''
# Make sure the locale is correct for you!
NVIDIA_STORE_URI = 'https://www.nvidia.com/en-us/shop/geforce/gpu/?page=1&limit=9&locale=en-us&category=GPU&gpu=RTX%203080'

# Only change these if you know what you are doing!
TIMEOUT = 10
CHECK_AVAILABLE_XPATH = "//img[@title='Nvidia RTX 3080']/../../..//span[contains(., 'Check Availability')]"
POPUP_XPATH = "//div[@class='popContent']"
STOCK_XPATH = "//img[@alt='Nvidia.com']/../..//div[@class='popCell cellBtn']"

# constants
UNKNOWN = 'unknown'
FOUND_STOCK_RET_CODE = 0
OOS_RET_CODE = 1
FAILED_STOCK_RET_CODE = 2
FAILED_CHECK_AVAIL_RET_CODE = 3

def main():
    ret = OOS_RET_CODE
    while ret == OOS_RET_CODE:
        (ret, text) = check_3080_stock()
        print(text)
        alert_if_stock_or_error(ret, text)
    sys.exit(int(ret))
    return


def alert_if_stock_or_error(ret, text):
    if ret != OOS_RET_CODE:
        from twilio.rest import Client
        client = Client(TWILIO_ACCOUNT_SID, TWILIO_AUTH_TOKEN)
        if ret == FOUND_STOCK_RET_CODE:
            msg = f'3080 stock available at nvidia.com "{text}"'
        elif ret == FAILED_CHECK_AVAIL_RET_CODE:
            msg = "failed to check available stock of 3080 at nvidia.com"
        elif ret == FAILED_STOCK_RET_CODE:
            msg = "failed to find stock for 3080 at nvidia.com"            
        else:
            msg = f'3080 stock unknown at nvidia.com "{text}" "{ret}"'
        client.messages.create(to=PHONE_NUM, from_=TWILIO_NUM,
                               body='3080 stock available at nvidia.com')
    return

    
def check_3080_stock():
    ret = FOUND_STOCK_RET_CODE
    stock_text = UNKNOWN
    if len(PATH_TO_FIREFOX):
        driver = webdriver.Firefox(firefox_binary=PATH_TO_FIREFOX)
    else:
        driver = webdriver.Firefox()
    driver.implicitly_wait(3)
    driver.get(NVIDIA_STORE_URI)
    try:
        check_btn = driver.find_element_by_xpath(CHECK_AVAILABLE_XPATH)
    except selenium.common.exceptions.NoSuchElementException:
        stock_text = 'FAILED to find check availability button'
        ret = FAILED_CHECK_AVAIL_RET_CODE
        driver.close()
        return (ret, stock_text)
    check_btn.text
    check_btn.click()
    begin = time()
    while stock_text == UNKNOWN:
        try:
            popup_div = driver.find_element_by_xpath(POPUP_XPATH)
            stock_elem = popup_div.find_element_by_xpath(STOCK_XPATH)
            stock_text = stock_elem.text                    
        except selenium.common.exceptions.NoSuchElementException:
            check_btn.text
            check_btn.click()

        if time() - begin > TIMEOUT:
            stock_text = 'FAILED to find stock level'
            ret = FAILED_STOCK_RET_CODE
            driver.close()
            return (ret, stock_text)
    driver.close()
    if stock_text == 'OUT OF STOCK':
        ret = OOS_RET_CODE
    return (ret, stock_text)


if __name__ == '__main__':
    main()