Added envvar support for running on Heroku.

- Use TEAM_1_WEBHOOK_OUT_TOKEN=xxxxxxxxxxxx style config for heroku.
- Also some python3 fixes.

(Squashed commits up to Fri Jun 30 11:13:00 2017 -0400, by wdoekes.)

.gitignore

@@ -0,0 +1,3 @@
+.env
+*.pyc
+__pycache__

Procfile

@@ -0,0 +1 @@
+web: gunicorn slackbridge --log-file -

README.md

@@ -38,6 +38,8 @@ Configuration in Slack:
 
 Configuration of this application:
 
+(Heroku configuration can be found below.)
+
   * Set the `BASE_PATH` to `"/"`. If this script does not run in the root of
     your HTTP server, you need to alter that.
   * There is a `CONFIG` dictionary below. You need to configure it as
@@ -96,6 +98,34 @@ the response there:
     who you can @mention.
 
 
+Heroku
+------
+
+These instructions require [Heroku Command
+Line](https://devcenter.heroku.com/articles/heroku-command-line).
+
+```
+heroku create
+cp sample.env .env
+# Properly set all environment variables in file
+vim .env
+# Test running the bridge locally
+heroku local
+# Push environment variables to Heroku
+heroku config:push --overwrite
+# Deploy to Heroku
+git push heroku <my-branch>
+```
+
+Things to note:
+
+  * Free Heroku dynos can only run 18 hours per day. After that, the
+    slack bridge will simply not work. This can be very confusing. You
+    may wish to consider paying $7/month for a 24h dyno.
+  * Please see `sample.env` for example of how to set environment
+    variables.
+
+
 TODO
 ----
 

requirements.txt

@@ -0,0 +1 @@
+gunicorn==19.6.0

runtime.txt

@@ -0,0 +1 @@
+python-3.5.2

sample.env

@@ -0,0 +1,17 @@
+ADMIN_EMAIL=[email protected]
+WEB_CONCURRENCY=3
+
+# CivicTechTO Slack
+PORTAL_1_SIDE_A_WEBHOOK_OUT_TOKEN=xxxxxxxxxxxx
+PORTAL_1_SIDE_A_WEBHOOK_IN_URL=https://hooks.slack.com/services/xxxxxxxxxxxx
+PORTAL_1_SIDE_A_CHANNEL_NAME=portal-yowcivictech
+PORTAL_1_SIDE_A_GROUP_NAME=yowcivictech
+PORTAL_1_SIDE_A_WEB_API_TOKEN=xxxxxxxxxxxx
+# YOWCivicTech Slack
+PORTAL_1_SIDE_B_WEBHOOK_OUT_TOKEN=xxxxxxxxxxxx
+PORTAL_1_SIDE_B_WEBHOOK_IN_URL=https://hooks.slack.com/services/xxxxxxxxxxxx
+PORTAL_1_SIDE_B_CHANNEL_NAME=portal-civictechto
+PORTAL_1_SIDE_B_GROUP_NAME=civictechto
+PORTAL_1_SIDE_B_WEB_API_TOKEN=xxxxxxxxxxxx
+
+# Can increment portal number and add another set...

slackbridge.py

@@ -132,6 +132,7 @@
 from email.header import Header
 from email.mime.text import MIMEText
 from multiprocessing import Process, Pipe
+from os import environ
 from pprint import pformat
 
 
@@ -142,7 +143,37 @@
 # The subdictionaries contain 'iwh_url' for "Incoming WebHooks" post and
 # a dictionary with payload updates ({'channel': '#new_chan'}).
 # TODO: should we index it by "service_id" instead of "(owh)token"?
-CONFIG = {}
+try:
+    CONFIG = {}
+    i = 1
+
+    while True:
+        portal_config = {
+            environ['PORTAL_{}_SIDE_A_WEBHOOK_OUT_TOKEN'.format(i)]: {
+                'iwh_url': environ['PORTAL_{}_SIDE_B_WEBHOOK_IN_URL'.format(i)],
+                'iwh_update': {
+                    'channel': environ['PORTAL_{}_SIDE_B_CHANNEL_NAME'.format(i)],
+                    '_atchannel': environ['PORTAL_{}_SIDE_A_GROUP_NAME'.format(i)],
+                    },
+                'owh_linked': environ['PORTAL_{}_SIDE_B_WEBHOOK_OUT_TOKEN'.format(i)],
+                'wa_token': environ['PORTAL_{}_SIDE_A_WEB_API_TOKEN'.format(i)],
+                },
+            environ['PORTAL_{}_SIDE_B_WEBHOOK_OUT_TOKEN'.format(i)]: {
+                'iwh_url': environ['PORTAL_{}_SIDE_A_WEBHOOK_IN_URL'.format(i)],
+                'iwh_update': {
+                    'channel': environ['PORTAL_{}_SIDE_A_CHANNEL_NAME'.format(i)],
+                    '_atchannel': environ['PORTAL_{}_SIDE_B_GROUP_NAME'.format(i)],
+                    },
+                'owh_linked': environ['PORTAL_{}_SIDE_A_WEBHOOK_OUT_TOKEN'.format(i)],
+                'wa_token': environ['PORTAL_{}_SIDE_B_WEB_API_TOKEN'.format(i)],
+                },
+            }
+
+        CONFIG.update(portal_config)
+        i += 1
+except KeyError:
+    pass
+
 # Lazy initialization of workers?
 LAZY_INITIALIZATION = True  # use, unless you have uwsgi-lazy-apps
 # Notification settings (mail_admins) in case of broken connections.