feat(users/Profpatsch/sync-abfall-ics-aichach-friedberg): init
A small script that fetches calendar files for our local trash provider. First step towards integrating ics files into my calendar setup. Change-Id: I0e8915a00c19349104cb6256e9dc87c17620fcae Reviewed-on: https://cl.tvl.fyi/c/depot/+/5883 Tested-by: BuildkiteCI Reviewed-by: Profpatsch <mail@profpatsch.de> Autosubmit: Profpatsch <mail@profpatsch.de>
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Profpatsch
clbot
parent
544d72189c
commit
4f0750cf90
3 changed files with 161 additions and 4 deletions
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@ -0,0 +1,14 @@
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{ depot, pkgs, ... }:
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let
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sync-to-dir = depot.users.Profpatsch.writers.python3
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{
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name = "sync-ics-to-dir";
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libraries = (py: [
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py.httpx
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py.icalendar
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]);
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} ./sync-ics-to-dir.py;
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in
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sync-to-dir
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# horrible little module that fetches ICS files for the local trash public service.
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#
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# It tries its best to not overwrite existing ICS files in case the upstream goes down
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# or returns empty ICS files.
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import sys
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import httpx
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import asyncio
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import icalendar
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from datetime import datetime
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import syslog
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import os.path
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# Internal id for the street (extracted from the ics download url)
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ortsteil_id = "e9c32ab3-df25-4660-b88e-abda91897d7a"
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# They are using a numeric encoding to refer to different kinds of trash
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fraktionen = {
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"restmüll": "1",
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"bio": "5",
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"papier": "7",
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"gelbe_tonne": "13",
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"problemmüllsammlung": "20"
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}
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def ics_url(year):
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frakt = ','.join(fraktionen.values())
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return f'https://awido.cubefour.de/Customer/aic-fdb/KalenderICS.aspx?oid={ortsteil_id}&jahr={year}&fraktionen={frakt}&reminder=1.12:00'
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def fetchers_for_years(start_year, no_of_years_in_future):
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"""given a starting year, and a number of years in the future,
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return the years for which to fetch ics files"""
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current_year = datetime.now().year
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max_year = current_year + no_of_years_in_future
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return {
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"passed_years": range(start_year, current_year),
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"this_and_future_years": range(current_year, 1 + max_year)
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}
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async def fetch_ics(c, url):
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"""fetch an ICS file from an URL"""
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try:
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resp = await c.get(url)
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except Exception as e:
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return { "ics_does_not_exist_exc": e }
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if resp.is_error:
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return { "ics_does_not_exist": resp }
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else:
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try:
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ics = icalendar.Calendar.from_ical(resp.content)
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return { "ics": { "ics_parsed": ics, "ics_bytes": resp.content } }
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except ValueError as e:
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return { "ics_cannot_be_parsed": e }
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def ics_has_events(ics):
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"""Determine if there is any event in the ICS, otherwise we can assume it’s an empty file"""
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for item in ics.walk():
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if isinstance(item, icalendar.Event):
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return True
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return False
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async def write_nonempty_ics(directory, year, ics):
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# only overwrite if the new ics has any events
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if ics_has_events(ics['ics_parsed']):
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path = os.path.join(directory, f"{year}.ics")
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with open(path, "wb") as f:
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f.write(ics['ics_bytes'])
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info(f"wrote ics for year {year} to file {path}")
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else:
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info(f"ics for year {year} was empty, skipping")
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def main():
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ics_directory = os.getenv("ICS_DIRECTORY", None)
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if not ics_directory:
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critical("please set ICS_DIRECTORY")
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start_year = int(os.getenv("ICS_START_YEAR", 2022))
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future_years = int(os.getenv("ICS_FUTURE_YEARS", 2))
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years = fetchers_for_years(start_year, no_of_years_in_future=future_years)
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async def go():
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async with httpx.AsyncClient(follow_redirects=True) as c:
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info(f"fetching ics for passed years: {years['passed_years']}")
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for year in years["passed_years"]:
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match await fetch_ics(c, ics_url(year)):
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case { "ics_does_not_exist_exc": error }:
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warn(f"The ics for the year {year} is gone, error when requesting: {error} for url {ics_url(year)}")
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case { "ics_does_not_exist": resp }:
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warn(f"The ics for the year {year} is gone, server returned status {resp.status} for url {ics_url(year)}")
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case { "ics_cannot_be_parsed": error }:
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warn(f"The returned ICS could not be parsed: {error} for url {ics_url(year)}")
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case { "ics": ics }:
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info(f"fetched ics from {ics_url(year)}")
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await write_nonempty_ics(ics_directory, year, ics)
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case _:
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critical("unknown case for ics result")
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info(f"fetching ics for current and upcoming years: {years['this_and_future_years']}")
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for year in years["this_and_future_years"]:
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match await fetch_ics(c, ics_url(year)):
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case { "ics_does_not_exist_exc": error }:
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critical(f"The ics for the year {year} is not available, error when requesting: {error} for url {ics_url(year)}")
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case { "ics_does_not_exist": resp }:
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critical(f"The ics for the year {year} is not available, server returned status {resp.status} for url {ics_url(year)}")
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case { "ics_cannot_be_parsed": error }:
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critical(f"The returned ICS could not be parsed: {error} for url {ics_url(year)}")
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case { "ics": ics }:
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info(f"fetched ics from {ics_url(year)}")
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await write_nonempty_ics(ics_directory, year, ics)
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case _:
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critical("unknown case for ics result")
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asyncio.run(go())
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def info(msg):
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syslog.syslog(syslog.LOG_INFO, msg)
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def critical(msg):
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syslog.syslog(syslog.LOG_CRIT, msg)
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sys.exit(1)
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def warn(msg):
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syslog.syslog(syslog.LOG_WARNING, msg)
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def debug(msg):
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syslog.syslog(syslog.LOG_DEBUG, msg)
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if __name__ == "__main__":
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main()
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@ -15,12 +15,18 @@ let
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string;
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Libraries = defun [ (attrs any) (list drv) ];
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pythonPackages = pkgs.python310Packages;
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python = pythonPackages.python;
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python3 =
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{ name
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, libraries ? (_: [ ])
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, flakeIgnore ? [ ]
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}: pkgs.writers.writePython3 name {
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libraries = Libraries libraries pkgs.python3Packages;
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}:
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let
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in
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pkgs.writers.makePythonWriter python pythonPackages name {
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libraries = Libraries libraries pythonPackages;
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flakeIgnore =
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let
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ignoreTheseErrors = [
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@ -37,6 +43,10 @@ let
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# … between functions
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"E302"
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"E305"
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# … if there’s too many of them
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"E303"
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# or lines that are too long
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"E501"
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];
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in
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list FlakeError (ignoreTheseErrors ++ flakeIgnore);
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]
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];
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in
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pkgs.python3Packages.buildPythonPackage {
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pythonPackages.buildPythonPackage {
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inherit name;
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src = srcTree;
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propagatedBuildInputs = libraries pkgs.python3Packages;
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propagatedBuildInputs = libraries pythonPackages;
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doCheck = false;
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};
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