Draft replies to meeting requests with your free times

import base64; from datetime import datetime, timedelta, timezone
from email.mime.text import MIMEText; from google.oauth2.credentials import Credentials
from googleapiclient.discovery import build
from clickruntime import on_trigger, credentials, state, ai, report_fetched
def free_slots(cal, n=3):
    now = datetime.now(timezone.utc); busy = cal.freebusy().query(body={"timeMin": now.isoformat(), "timeMax": (now + timedelta(days=7)).isoformat(), "items": [{"id": "primary"}]}).execute()["calendars"]["primary"]["busy"]
    slots, day = [], now.replace(minute=0, second=0, microsecond=0) + timedelta(days=1)
    while len(slots) < n and day < now + timedelta(days=8):
        start = day.replace(hour=9 + 2 * len(slots))
        if start.weekday() < 5 and not any(b["start"] < (start + timedelta(minutes=30)).isoformat() and b["end"] > start.isoformat() for b in busy):
            slots.append(start.strftime("%A %d %B, %H:%M UTC"))
        day += timedelta(days=1)
    return slots
@on_trigger
def run(event):
    creds = Credentials(credentials.connection("google", "work")); cal = build("calendar", "v3", credentials=creds, cache_discovery=False)
    gmail = build("gmail", "v1", credentials=creds, cache_discovery=False).users(); seen = set(state.get("seen") or [])
    msgs = [m for m in gmail.messages().list(userId="me", q="in:inbox newer_than:1d -category:promotions").execute().get("messages", []) if m["id"] not in seen]
    report_fetched(len(msgs))
    if not msgs:
        return {"summary": "Nothing new"}
    for m in msgs:
        msg = gmail.messages().get(userId="me", id=m["id"], format="metadata", metadataHeaders=["From", "Subject"]).execute(); h = {x["name"]: x["value"] for x in msg["payload"]["headers"]}
        if ai.generate(f"Is this email asking to schedule a meeting? Answer yes or no.\n{h.get('Subject')}\n{msg['snippet']}", max_output_tokens=5).text.strip().lower().startswith("yes"):
            body = "Thanks for reaching out. I could do any of these:\n" + "\n".join(f"- {s}" for s in free_slots(cal)) + "\nLet me know which suits you."
            raw = MIMEText(body); raw["To"], raw["Subject"] = h["From"], "Re: " + h.get("Subject", "")
            gmail.drafts().create(userId="me", body={"message": {"threadId": msg["threadId"], "raw": base64.urlsafe_b64encode(raw.as_bytes()).decode()}}).execute()
        seen.add(m["id"])
    state.set("seen", list(seen)[-1000:])
    return {"checked": len(msgs)}