Add a route to implement a /rot slash command

This is to be used as follows:

	/rot [count] String to rotate

The optional count indicates a number of positions to rotate every
letter in the string. If it is not provided, all rotations will be
printed.

Note: The count can also be provided as an '*' character to explicitly
request all possible rotations.

diff --git a/requirements.in b/requirements.in
index 1ec97a89bbf8a051115f94d085d4466a83e96dc9..1969d31a520bdf614d6494a1d0f3d1004770d0b9 100644 (file)
--- a/requirements.in
+++ b/requirements.in
@@ -3,3 +3,4 @@ flask_restful
 python-dotenv
 slackclient
 slackeventsapi
+requests

diff --git a/requirements.txt b/requirements.txt
index 95004d31efb4fcc4ec5f1da238435277385e91fe..62de8a6af64cb44b4efa0607c34d204f9b5d3bdb 100644 (file)
--- a/requirements.txt
+++ b/requirements.txt
@@ -30,10 +30,14 @@ attrs==20.2.0 \
     --hash=sha256:26b54ddbbb9ee1d34d5d3668dd37d6cf74990ab23c828c2888dccdceee395594 \
     --hash=sha256:fce7fc47dfc976152e82d53ff92fa0407700c21acd20886a13777a0d20e655dc \
     # via aiohttp
+certifi==2020.6.20 \
+    --hash=sha256:5930595817496dd21bb8dc35dad090f1c2cd0adfaf21204bf6732ca5d8ee34d3 \
+    --hash=sha256:8fc0819f1f30ba15bdb34cceffb9ef04d99f420f68eb75d901e9560b8749fc41 \
+    # via requests
 chardet==3.0.4 \
     --hash=sha256:84ab92ed1c4d4f16916e05906b6b75a6c0fb5db821cc65e70cbd64a3e2a5eaae \
     --hash=sha256:fc323ffcaeaed0e0a02bf4d117757b98aed530d9ed4531e3e15460124c106691 \
-    # via aiohttp
+    # via aiohttp, requests
 click==7.1.2 \
     --hash=sha256:d2b5255c7c6349bc1bd1e59e08cd12acbbd63ce649f2588755783aa94dfb6b1a \
     --hash=sha256:dacca89f4bfadd5de3d7489b7c8a566eee0d3676333fbb50030263894c38c0dc \
@@ -49,7 +53,7 @@ flask==1.1.2 \
 idna==2.10 \
     --hash=sha256:b307872f855b18632ce0c21c5e45be78c0ea7ae4c15c828c20788b26921eb3f6 \
     --hash=sha256:b97d804b1e9b523befed77c48dacec60e6dcb0b5391d57af6a65a312a90648c0 \
-    # via yarl
+    # via requests, yarl
 itsdangerous==1.1.0 \
     --hash=sha256:321b033d07f2a4136d3ec762eac9f16a10ccd60f53c0c91af90217ace7ba1f19 \
     --hash=sha256:b12271b2047cb23eeb98c8b5622e2e5c5e9abd9784a153e9d8ef9cb4dd09d749 \
@@ -124,6 +128,10 @@ pytz==2020.1 \
     --hash=sha256:a494d53b6d39c3c6e44c3bec237336e14305e4f29bbf800b599253057fbb79ed \
     --hash=sha256:c35965d010ce31b23eeb663ed3cc8c906275d6be1a34393a1d73a41febf4a048 \
     # via flask-restful
+requests==2.24.0 \
+    --hash=sha256:b3559a131db72c33ee969480840fff4bb6dd111de7dd27c8ee1f820f4f00231b \
+    --hash=sha256:fe75cc94a9443b9246fc7049224f75604b113c36acb93f87b80ed42c44cbb898 \
+    # via -r requirements.in
 six==1.15.0 \
     --hash=sha256:30639c035cdb23534cd4aa2dd52c3bf48f06e5f4a941509c8bafd8ce11080259 \
     --hash=sha256:8b74bedcbbbaca38ff6d7491d76f2b06b3592611af620f8426e82dddb04a5ced \
@@ -136,6 +144,10 @@ slackeventsapi==2.2.1 \
     --hash=sha256:1582964860b9e00b721ddfc7402defdd02bdf73f48d4cee7fb952a3b27db45fb \
     --hash=sha256:6baa2bf12b5a9d312bf02836720f3ea3b730377449d67ea92ec63fc7c02c7c30 \
     # via -r requirements.in
+urllib3==1.25.10 \
+    --hash=sha256:91056c15fa70756691db97756772bb1eb9678fa585d9184f24534b100dc60f4a \
+    --hash=sha256:e7983572181f5e1522d9c98453462384ee92a0be7fac5f1413a1e35c56cc0461 \
+    # via requests
 werkzeug==1.0.1 \
     --hash=sha256:2de2a5db0baeae7b2d2664949077c2ac63fbd16d98da0ff71837f7d1dea3fd43 \
     --hash=sha256:6c80b1e5ad3665290ea39320b91e1be1e0d5f60652b964a3070216de83d2e47c \

diff --git a/turbot.py b/turbot.py
index 6c0d8b96d80889c10ad0659dad5531b892d326de..b8e3da2d9f17b7936006910f00c3fe48e4de81d6 100755 (executable)
--- a/turbot.py
+++ b/turbot.py
@@ -1,10 +1,13 @@
 #!/usr/bin/env python3
 
-from flask import Flask
+from flask import Flask, request
 
 from slackeventsapi import SlackEventAdapter
 from slack import WebClient
+from slack.errors import SlackApiError
 import os
+import requests
+import re
 
 app = Flask(__name__)
 
@@ -14,6 +17,57 @@ slack_bot_token = os.environ['SLACK_BOT_TOKEN']
 slack_events = SlackEventAdapter(slack_signing_secret, "/slack/events", app)
 slack_client = WebClient(slack_bot_token)
 
+def rot_string(str, n=13):
+    result = ''
+    for letter in str:
+        if letter.isupper():
+            result += chr(ord("A") + (ord(letter) - ord("A") + n) % 26)
+        else:
+            result += letter
+    return result
+
+@app.route('/rot', methods = ['POST'])
+def rot():
+    response_url = request.form.get('response_url')
+    channel_name = request.form.get('channel_name')
+    channel = request.form.get('channel_id')
+    query = request.form.get('text')
+
+    match = re.match('^([0-9]+|\*) (.*)$', query)
+    if (match):
+        try:
+            count = int(match.group(1))
+        except:
+            count = None
+        text = match.group(2)
+    else:
+        count = None
+        text = query
+
+    text = text.upper()
+
+    reply = "```/rot {} {}\n".format(count if count else '*', text)
+
+    if count:
+        reply += rot_string(text, count)
+    else:
+        reply += "\n".join(["{:02d} ".format(count) + rot_string(text, count) for count in range(1,26)])
+
+    reply += "```"
+
+    if (channel_name == "directmessage"):
+        resp = requests.post(response_url,
+                             json = {"text": reply},
+                             headers = {"Content-type": "application/json"})
+        if (resp.status_code != 200):
+            app.logger.error("Error posting request to Slack: " + resp.text)
+    else:
+        try:
+            slack_client.chat_postMessage(channel=channel, text=reply)
+        except SlackApiError as e:
+            app.logger.error("Slack API error: " + e.response["error"])
+    return ""
+
 @slack_events.on("error")
 def handle_error(error):
     app.logger.error("Error from Slack: " + str(error))