Progress in Slack via snippets

progress.py

# coding=utf-8
from __future__ import unicode_literals

import datetime
import os
import time

import requests

TOKEN = os.environ.get("SLACK_TOKEN")
CHANNEL = os.environ.get("SLACK_CHANNEL")

done = "█"
not_done = " "

messages = [
    "Selling customer CCs to bad guys",
    "Deleting user data",
    "Smashing backups",
    "Dropping triggers",
    "Panicking",
]

def main():
    start = datetime.datetime.utcnow()
    params = {
        "token": TOKEN,
        "channels": CHANNEL,
        "title": ":skull_and_crossbones: "
                 "Destroying Production Database :skull_and_crossbones:",
        "content": "  0%▕" + not_done * 10 + "▏00:00",
    }
    resp = requests.post("https://slack.com/api/files.upload", params=params)

    file_id = resp.json()["file"]["id"]
    params["file"] = file_id

    msg_i = 0
    buf = []

    for i in range (0, 11):
        now = datetime.datetime.utcnow() - start

        elapsed = "%.2d:%.2d" % (now.total_seconds() / 60,
                                   now.total_seconds() % 60)
        bar = "▕" + done * i + not_done * (10 - i) + "▏"
        params["content"] = " %3d%%" % (i * 10) + bar + elapsed

        if i % 2 == 0 and msg_i < len(messages):
            if len(buf) > 0:
                buf[-1] = "✓ " + buf[-1]
            buf.append(messages[msg_i])
            msg_i += 1

        if i == 10:
            if len(buf) > 0:
                buf[-1] = "✓ " + buf[-1]
            buf.append("Done!")

        if len(buf) > 3:
            buf = buf [1:]

        params["content"] += "\n   - " + "\n   - ".join(buf)

        requests.post("https://slack.com/api/files.edit", params=params)
        time.sleep(1)


if __name__ == "__main__":
    main()