X-Git-Url: https://git.cworth.org/git?a=blobdiff_plain;f=turbot_flask%2Fturbot.py;h=ea0607ccea16d1871450dc75602a53613f02289e;hb=5f54f1ee53b8ae1b9d93df3f56c6a992f1d1bf0a;hp=df7d51e0195cce4c3ed097816db5aac4864b5d08;hpb=13839f9cacfd7aaa389bf6983c5e9b98beead6af;p=turbot

diff --git a/turbot_flask/turbot.py b/turbot_flask/turbot.py
index df7d51e..ea0607c 100644
--- a/turbot_flask/turbot.py
+++ b/turbot_flask/turbot.py
@@ -1,18 +1,105 @@
 #!/usr/bin/env python3
 
-from flask import Flask
+from flask import current_app
+from slack import WebClient
+from slack.signature import SignatureVerifier
+from flask import Flask, request, make_response
 from slackeventsapi import SlackEventAdapter
+
 import os
+import requests
 import threading
-from turbot.rot import rot_route
-from turbot.slack import slack_send_message
+from turbot.rot import rot
 from turbot.sheets import sheets_create
 
 app = Flask(__name__)
-app.register_blueprint(rot_route)
 
 slack_signing_secret = os.environ['SLACK_SIGNING_SECRET']
-slack_events = SlackEventAdapter(slack_signing_secret, "/slack/events", app)
+slack_events = SlackEventAdapter(slack_signing_secret, "/events", app)
+
+slack_bot_token = os.environ['SLACK_BOT_TOKEN']
+
+signature_verifier = SignatureVerifier(slack_signing_secret)
+slack_client = WebClient(slack_bot_token)
+
+def slack_is_valid_request(request):
+    """Returns true if request actually came from Slack.
+
+    By means of checking the requests signature together with the slack
+    signing key.
+
+    Note: If flask is in debug mode, this function will always return true."""
+
+    if current_app.debug:
+        return True
+
+    data = request.get_data()
+    headers = request.headers
+
+    return signature_verifier.is_valid_request(data, headers)
+
+def slack_send_reply(request, text):
+    """Send a Slack message as a reply to a specified request.
+
+    If the request is associated with a direct message, the reply is
+    made by using the "response_url" from the request. Otherwise, the
+    reply will be sent to the channel associated with the request.
+
+    Note: If flask is in debug mode, this function will just print the
+    text to stdout."""
+
+    app = current_app
+    channel_name = request.form.get('channel_name')
+    response_url = request.form.get('response_url')
+    channel = request.form.get('channel_id')
+
+    if (app.debug):
+        print("Sending message to channel '{}': {}".format(channel, text))
+        return
+
+    if (channel_name == "directmessage"):
+        resp = requests.post(response_url,
+                             json = {"text": text},
+                             headers = {"Content-type": "application/json"})
+        if (resp.status_code != 200):
+            app.logger.error("Error posting request to Slack: " + resp.text)
+    else:
+        slack_send_message(channel, text)
+
+def slack_send_message(channel, text):
+    """Send a Slack message to a specified channel."""
+
+    slack_client.chat_postMessage(channel=channel, text=text)
+
+@app.route('/rot', methods = ['POST'])
+def rot_route():
+    """Implements the /rot slash command for Slack replying in Slack
+
+    The format of this command is as follows:
+
+        /rot [count|*] String to be rotated
+
+    The optional count indicates an amount to rotate each character in the
+    string. If the count is '*' or is not present, then the string will
+    be rotated through all possible 25 values.
+
+    The result of the rotation is provided as a message in Slack. If the
+    slash command was issued in a direct message, the response is made by
+    using the "response_url" from the request. This allows the bot to reply
+    in a direct message that it is not a member of. Otherwise, if the slash
+    command was issued in a channel, the bot will reply in that channel."""
+
+    if not slack_is_valid_request(request):
+        return make_response("invalid request", 403)
+
+    text = request.form.get('text')
+
+    reply = rot(text)
+
+    slack_send_reply(request, reply)
+
+    return ""
+
 
 @slack_events.on("channel_created")
 def handle_channel_created(event_data):