108 lines
2.9 KiB
Python
108 lines
2.9 KiB
Python
"""Geomob events."""
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import os
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from dataclasses import dataclass
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from datetime import date, datetime
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from typing import List
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import dateutil.parser
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import flask
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import lxml.html
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import requests
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import agenda.mail
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import agenda.utils
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@dataclass(frozen=True)
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class GeomobEvent:
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"""Geomob event."""
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date: date
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href: str
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hashtag: str
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def extract_events(
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tree: lxml.html.HtmlElement,
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) -> List[GeomobEvent]:
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"""Extract upcoming events from the HTML content."""
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events = []
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for event in tree.xpath('//ol[@class="event-list"]/li/a'):
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date_str, _, hashtag = event.text_content().strip().rpartition(" ")
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events.append(
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GeomobEvent(
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date=dateutil.parser.parse(date_str).date(),
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href=event.get("href"),
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hashtag=hashtag,
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)
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)
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return events
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def find_new_events(
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prev: list[GeomobEvent], cur: list[GeomobEvent]
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) -> list[GeomobEvent]:
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"""Find new events that appear in cur but not in prev."""
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return list(set(cur) - set(prev))
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def geomob_email(new_events: list[GeomobEvent], base_url: str) -> tuple[str, str]:
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"""Generate email subject and body for new events.
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Args:
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new_events (List[Event]): List of new events.
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base_url (str): The base URL of the website.
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Returns:
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tuple[str, str]: Email subject and body.
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"""
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assert new_events
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subject = f"{len(new_events)} New Geomob Event(s) Announced"
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body_lines = ["Hello,\n", "Here are the new Geomob events:\n"]
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for event in new_events:
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event_details = (
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f"Date: {event.date}\n"
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f"URL: {base_url + event.href}\n"
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f"Hashtag: {event.hashtag}\n"
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)
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body_lines.append(event_details)
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body_lines.append("-" * 40)
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body = "\n".join(body_lines)
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return (subject, body)
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def get_cached_upcoming_events_list(geomob_dir: str) -> list[GeomobEvent]:
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"""Get known geomob events."""
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filename = agenda.utils.get_most_recent_file(geomob_dir, "html")
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return extract_events(lxml.html.parse(filename).getroot()) if filename else []
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def update(config: flask.config.Config) -> None:
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"""Get upcoming Geomob events and report new ones."""
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geomob_dir = os.path.join(config["DATA_DIR"], "geomob")
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prev_events = get_cached_upcoming_events_list(geomob_dir)
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r = requests.get("https://thegeomob.com/")
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cur_events = extract_events(lxml.html.fromstring(r.content))
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if cur_events == prev_events:
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return # no change
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now = datetime.now()
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new_filename = os.path.join(geomob_dir, now.strftime("%Y-%m-%d_%H:%M:%S.html"))
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open(new_filename, "w").write(r.text)
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new_events = list(set(cur_events) - set(prev_events))
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if not new_events:
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return
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base_url = "https://thegeomob.com/"
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subject, body = geomob_email(new_events, base_url)
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agenda.mail.send_mail(config, subject, body)
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