Get a Slack alert when a Google review is edited

from clickruntime import on_trigger, credentials, http, notify, state, report_fetched

LOCATION = "accounts/1234567890/locations/9876543210"  # Rosa's Bakery
STARS = {"ONE": 1, "TWO": 2, "THREE": 3, "FOUR": 4, "FIVE": 5}
stars = lambda n: "★" * n + "☆" * (5 - n)

@on_trigger
def run(event):
    resp = http.get(f"https://mybusiness.googleapis.com/v4/{LOCATION}/reviews",
                    params={"orderBy": "updateTime desc", "pageSize": 50},
                    headers={"Authorization": f"Bearer {credentials.connection('google', 'work')}"})
    resp.raise_for_status()
    known = state.get("known") or {}
    first_run = not known
    edits = 0
    for r in resp.json().get("reviews", []):
        now = {"stars": STARS[r["starRating"]], "text": r.get("comment", "")}
        before = known.get(r["reviewId"])
        known[r["reviewId"]] = now
        if first_run or not before or before == now:
            continue
        reply = r.get("reviewReply")
        replied = f"We replied on {reply['updateTime'][:10]}; check the reply still fits." if reply else "No reply from us yet."
        notify.slack(f":pencil2: {r['reviewer']['displayName']} edited their review: "
                     f"{stars(before['stars'])} → {stars(now['stars'])}\n"
                     f"Before: \"{before['text'] or '(no text)'}\"\nNow: \"{now['text'] or '(no text)'}\"\n{replied}",
                     channel="#reviews")
        edits += 1
    state.set("known", dict(list(known.items())[:500]))
    report_fetched(edits)
    return {"edits": edits}