Get a Telegram alert for new Google Calendar invites

from datetime import datetime
from google.oauth2.credentials import Credentials
from googleapiclient.discovery import build
from clickruntime import on_trigger, credentials, http, state

CAL, ME, CHAT_ID = "primary", "you@example.com", "123456789"

def tg(method, **params):
    r = http.post(f"https://api.telegram.org/bot{credentials.secret('TELEGRAM_BOT_TOKEN')}/{method}", json=params)
    r.raise_for_status()
    return r.json()["result"]

def when(e):
    s, end = e["start"].get("dateTime"), e["end"].get("dateTime")
    if not s:
        return f"{e['start']['date']} (all day)"
    a, b = datetime.fromisoformat(s), datetime.fromisoformat(end)
    return f"{a:%a %d %b, %H:%M}–{b:%H:%M}"

@on_trigger
def run(event):
    since = state.get("since") or event.get("scheduled_time")
    cal = build("calendar", "v3", credentials=Credentials(credentials.connection("google", "work")), cache_discovery=False)
    items = cal.events().list(calendarId=CAL, updatedMin=since, showDeleted=True, singleEvents=True,
                              maxResults=50).execute().get("items", [])
    sent = 0
    for e in items:
        org = (e.get("organizer") or {}).get("email", "")
        if org == ME:
            continue
        if e["status"] == "cancelled":
            text = f"❌ Cancelled: {e.get('summary', 'event')}"
        elif e.get("created", "")[:16] == e.get("updated", "")[:16] or e.get("created", "") >= since:
            me = next((a for a in e.get("attendees", []) if a.get("self")), {})
            status = {"needsAction": "you have not replied", "accepted": "accepted", "tentative": "maybe", "declined": "declined"}.get(me.get("responseStatus"), "")
            text = f"📅 New invite: {e.get('summary', '(no title)')}\n{when(e)}\nFrom: {org} · {status}\n{e.get('htmlLink', '')}"
        else:
            continue
        tg("sendMessage", chat_id=CHAT_ID, text=text, disable_web_page_preview=True)
        sent += 1
    state.set("since", max([e["updated"] for e in items] + [since]))
    return {"alerts": sent}