#!/usr/bin/env python3
# Startdate: 2020-05-29 16:22
# History:
# Usage:
#    ln -s issues.all.web_url output/files-to-fetch.txt
#    ./fetch-issues-webpages.py
# How to make this work:
#    apt-get install python3-pyvirtualdisplay
#    download this geckodriver, place in /usr/local/bin
# References:
#    basic guide https://web.archive.org/web/20191031110759/http://scraping.pro/use-headless-firefox-scraping-linux/
#    https://stackoverflow.com/questions/40302006/no-such-file-or-directory-geckodriver-for-a-python-simple-selenium-applicatio
#    geckodriver https://github.com/mozilla/geckodriver/releases/download/v0.24.0/geckodriver-v0.24.0-linux64.tar.gz
#    https://www.selenium.dev/selenium/docs/api/py/index.html?highlight=get
#    page source https://www.selenium.dev/selenium/docs/api/py/webdriver_remote/selenium.webdriver.remote.webdriver.html?highlight=title#selenium.webdriver.remote.webdriver.WebDriver.title
#    make sure all comments load https://stackoverflow.com/questions/26566799/wait-until-page-is-loaded-with-selenium-webdriver-for-python/44998503#44998503
#    https://crossbrowsertesting.com/blog/test-automation/automate-login-with-selenium/
# Improve:
from pyvirtualdisplay import Display
from selenium import webdriver
from selenium.webdriver.support.ui import WebDriverWait
import re, time, getpass

def ask_password(prompt):
    #return input(prompt+": ")
    return getpass.getpass(prompt+": ")

def scrollDown(driver, value):
   driver.execute_script("window.scrollBy(0,"+str(value)+")")

# Scroll down the page
def scrollDownAllTheWay(driver):
   old_page = driver.page_source
   while True:
      #logging.debug("Scrolling loop")
      for i in range(2):
         scrollDown(driver, 500)
         time.sleep(2)
      new_page = driver.page_source
      if new_page != old_page:
         old_page = new_page
      else:
         break
   return True

server_string="https://git.devuan.org"
outdir="/mnt/public/www/gitlab-issues"

with open("output/files-to-fetch.txt") as f:
   lines=[line.rstrip() for line in f]

# ask password now instead of after the delay
password = ask_password("Enter password for "+server_string)

display = Display(visible=0, size=(800, 600))
display.start()

browser = webdriver.Firefox()

# log in to gitlab instance
browser.get(server_string+"/users/sign_in")
browser.find_element_by_id("user_login").send_keys('bgstack15')
browser.find_element_by_id("user_password").send_keys(password)
browser.find_element_by_class_name("qa-sign-in-button").click()
browser.get(server_string+"/profile") # always needs the authentication
scrollDownAllTheWay(browser)

for thisfile in lines:
   destfile=re.sub("\.+",".",re.sub("\/|issues",".",re.sub("^"+re.escape(server_string)+"\/","",thisfile)))+".html"
   print("Saving",thisfile,outdir+"/"+destfile)
   browser.get(thisfile)
   scrollDownAllTheWay(browser)
   with open(outdir+"/"+destfile,"w") as text_file:
      print(browser.page_source.encode('utf-8'),file=text_file)

# done with loop
browser.quit()
display.stop()