|
| 1 | +import os |
| 2 | +import hmac |
| 3 | +from urllib.parse import parse_qs |
| 4 | +from functools import partial |
| 5 | +import json |
| 6 | + |
| 7 | +import requests |
| 8 | + |
| 9 | + |
| 10 | +def lambda_handler(event, context): |
| 11 | + """ |
| 12 | + lambda entry point |
| 13 | + """ |
| 14 | + print(f"event: {event}") |
| 15 | + |
| 16 | + # verify request is from slack (skip when local) |
| 17 | + if "AWS_SAM_LOCAL" not in os.environ and not verify( |
| 18 | + key=os.environ["SLACK_KEY"].encode(), |
| 19 | + version="v0", |
| 20 | + timestamp=event["params"]["header"]["X-Slack-Request-Timestamp"], |
| 21 | + payload=event["payload"], |
| 22 | + signature=event["params"]["header"]["X-Slack-Signature"].split("=")[1], |
| 23 | + ): |
| 24 | + print("failed to verify Slack's message signature") |
| 25 | + return |
| 26 | + |
| 27 | + # parse payload params (url query style) |
| 28 | + params = parse_qs(event["payload"]) |
| 29 | + response_url = params["response_url"][0] |
| 30 | + command = params["command"][0] |
| 31 | + |
| 32 | + callback = partial(send, response_url) |
| 33 | + |
| 34 | + # handle commands |
| 35 | + if command == "/cfp": |
| 36 | + get_sessions(callback, secret=os.environ["SESSIONISE_KEY"]) |
| 37 | + elif command == "/tickets": |
| 38 | + get_tickets( |
| 39 | + callback, |
| 40 | + secret=os.environ["TITO_KEY"], |
| 41 | + org=os.environ["TITO_ORG"], |
| 42 | + slug=os.environ["TITO_EVENT"], |
| 43 | + ) |
| 44 | + else: |
| 45 | + print("no command found") |
| 46 | + |
| 47 | + |
| 48 | +def get_sessions(callback, secret): |
| 49 | + """ |
| 50 | + get total submissions number and last 10 submissions titles |
| 51 | + """ |
| 52 | + try: |
| 53 | + r = requests.get(f"https://sessionize.com/api/v2/{secret}/view/sessions") |
| 54 | + except Exception as e: |
| 55 | + print("sessionize didn't respond correctly") |
| 56 | + raise e |
| 57 | + |
| 58 | + sessions = r.json()[0]["sessions"] |
| 59 | + content = f":star2: Number of talk submissions: *{len(sessions)}*\n" |
| 60 | + content += "\n" |
| 61 | + content += "recent submissions:\n" |
| 62 | + |
| 63 | + sorted_sess = sorted(sessions, key=lambda i: i["id"], reverse=True) |
| 64 | + for i, s in enumerate(sorted_sess[:5]): |
| 65 | + content += f"{i+1}. {s['title']}\n" |
| 66 | + |
| 67 | + callback(content) |
| 68 | + |
| 69 | + |
| 70 | +def get_tickets(callback, secret, org, slug): |
| 71 | + """ |
| 72 | + get number of tickets sold |
| 73 | + """ |
| 74 | + try: |
| 75 | + r = requests.get( |
| 76 | + f"https://api.tito.io/v3/{org}/{slug}/tickets", |
| 77 | + headers={ |
| 78 | + "Accept": "application/json", |
| 79 | + "Authorization": f"Token token={secret}", |
| 80 | + }, |
| 81 | + ) |
| 82 | + except Exception as e: |
| 83 | + print("ti.to chocked") |
| 84 | + raise e |
| 85 | + |
| 86 | + tickets = r.json()["tickets"] |
| 87 | + content = f"tickets sold: {len(tickets)}" |
| 88 | + |
| 89 | + callback(content) |
| 90 | + |
| 91 | + |
| 92 | +def send(url, content): |
| 93 | + payload = {"text": content} |
| 94 | + if url == "local": |
| 95 | + print(payload) |
| 96 | + return |
| 97 | + |
| 98 | + try: |
| 99 | + r = requests.post(url, json=payload) |
| 100 | + except Exception as e: |
| 101 | + print("slack didn't like that") |
| 102 | + raise e |
| 103 | + |
| 104 | + r.raise_for_status() |
| 105 | + |
| 106 | + |
| 107 | +def verify(*, key, version, timestamp, payload, signature): |
| 108 | + """ |
| 109 | + verify slack message. |
| 110 | + info: https://api.slack.com/docs/verifying-requests-from-slack#a_recipe_for_security |
| 111 | + """ |
| 112 | + msg = f"{version}:{timestamp}:{payload}".encode() |
| 113 | + h = hmac.new(key, msg, "sha256") |
| 114 | + |
| 115 | + return hmac.compare_digest(h.hexdigest(), signature) |
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