Post the most-reacted Slack messages of the week

import time
from clickruntime import on_trigger, credentials, http, notify

CHANNEL_ID = "C0123GENERAL"
CHANNEL = "#general"
TOP = 5

def slack(method, **params):
    resp = http.get(f"https://slack.com/api/{method}", params=params,
                    headers={"Authorization": f"Bearer {credentials.connection('slack', 'work')}"})
    data = resp.json()
    if not data.get("ok"):
        raise RuntimeError(data.get("error"))
    return data

@on_trigger
def run(event):
    oldest = str(time.time() - 7 * 86400)
    msgs, cursor = [], None
    while True:
        page = slack("conversations.history", channel=CHANNEL_ID, oldest=oldest, limit=200, **({"cursor": cursor} if cursor else {}))
        msgs += [m for m in page["messages"] if m.get("reactions") and not m.get("bot_id") and m.get("subtype") is None]
        cursor = page.get("response_metadata", {}).get("next_cursor")
        if not cursor:
            break
    msgs.sort(key=lambda m: -sum(r["count"] for r in m["reactions"]))
    if not msgs:
        return {"top": 0}
    lines = []
    for n, m in enumerate(msgs[:TOP], 1):
        link = slack("chat.getPermalink", channel=CHANNEL_ID, message_ts=m["ts"])["permalink"]
        rx = " · ".join(f":{r['name']}: {r['count']}" for r in sorted(m["reactions"], key=lambda r: -r["count"])[:2])
        text = m.get("text", "").replace("\n", " ")
        lines.append(f"{n}. <@{m['user']}> · {rx} — <{link}|\"{text[:80]}{'…' if len(text) > 80 else ''}\">")
    notify.slack(f"Most-reacted this week in {CHANNEL}:\n" + "\n".join(lines), channel=CHANNEL)
    return {"top": len(lines)}