Cronjob to check GWR advance ticket date

Closes: #53
This commit is contained in:
Edward Betts 2023-11-05 14:09:04 +00:00
parent 7ccb02d9c5
commit 0a39c4dbbe
2 changed files with 75 additions and 4 deletions

View file

@ -7,6 +7,8 @@ from time import time
import requests import requests
url = "https://www.gwr.com/your-tickets/choosing-your-ticket/advance-tickets"
def extract_weekday_date(html: str) -> date | None: def extract_weekday_date(html: str) -> date | None:
"""Furthest date of GWR advance ticket booking.""" """Furthest date of GWR advance ticket booking."""
@ -30,13 +32,12 @@ def extract_weekday_date(html: str) -> date | None:
def advance_tickets_page_html(data_dir: str, ttl: int = 60 * 60 * 6) -> str: def advance_tickets_page_html(data_dir: str, ttl: int = 60 * 60 * 6) -> str:
"""Get advance-tickets web page HTML with cache.""" """Get advance-tickets web page HTML with cache."""
filename = os.path.join(data_dir, "advance-tickets.html") filename = os.path.join(data_dir, "advance-tickets.html")
url = "https://www.gwr.com/your-tickets/choosing-your-ticket/advance-tickets"
mtime = os.path.getmtime(filename) if os.path.exists(filename) else 0 mtime = os.path.getmtime(filename) if os.path.exists(filename) else 0
if (time() - mtime) < ttl: # use cache if (time() - mtime) < ttl: # use cache
return open(filename).read() return open(filename).read()
r = requests.get(url) html = requests.get(url).text
open(filename, "w").write(r.text) open(filename, "w").write(html)
return r.text return html
def advance_ticket_date(data_dir: str) -> date | None: def advance_ticket_date(data_dir: str) -> date | None:

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@ -0,0 +1,70 @@
#!/usr/bin/python3
"""Update GWR advance ticket date cache."""
import configparser
import os.path
import smtplib
from email.message import EmailMessage
from email.utils import formatdate, make_msgid
import requests
from agenda import gwr
SMTP_HOST = "4angle.com"
EMAIL = "edward@4angle.com"
NAME = "Edward Betts"
def send_mail(subject: str, body: str) -> None:
"""Send an e-mail."""
msg = EmailMessage()
msg["Subject"] = subject
msg["To"] = f"{NAME} <{EMAIL}>"
msg["From"] = f"{NAME} <{EMAIL}>"
msg["Date"] = formatdate()
msg["Message-ID"] = make_msgid()
msg.set_content(body)
s = smtplib.SMTP(SMTP_HOST)
s.sendmail(EMAIL, [EMAIL], msg.as_string())
s.quit()
def get_data_dir() -> str:
"""Read data dir from config."""
config_filename = os.path.join(os.path.dirname(__file__), "..", "config")
assert os.path.exists(config_filename)
config = configparser.ConfigParser()
config.read(config_filename)
return config.get("data", "dir")
def main() -> None:
"""Get date from web page and compare with existing."""
filename = os.path.join(get_data_dir(), "advance-tickets.html")
existing_html = open(filename).read()
existing_date = gwr.extract_weekday_date(existing_html)
new_html = requests.get(gwr.url).text
open(filename, "w").write(new_html)
new_date = gwr.extract_weekday_date(new_html)
if existing_date == new_date:
return
subject = "New GWR advance ticket booking date: {new_date}"
body = """Old date: {old_date}
New date: {new_date}
{gwr.url}
Agenda: https://edwardbetts.com/agenda/
"""
send_mail(subject, body)