Slack Integration (#170)

* slack integration

* recomment server variables

* recomment server variables

Gemfile

@@ -76,3 +76,5 @@ gem 'jquery-datatables-rails', '~> 3.4.0'
 gem 'rails-timeago', '~> 2.0'
 
 gem 'http_accept_language'
+
+gem 'slack-notifier'

Gemfile.lock

@@ -186,6 +186,7 @@ GEM
       json (>= 1.8, < 3)
       simplecov-html (~> 0.10.0)
     simplecov-html (0.10.0)
+    slack-notifier (2.1.0)
     spring (2.0.0)
       activesupport (>= 4.2)
     spring-watcher-listen (2.0.1)
@@ -247,6 +248,7 @@ DEPENDENCIES
   rails-timeago (~> 2.0)
   sass-rails (~> 5.0)
   simplecov
+  slack-notifier
   spring
   spring-watcher-listen (~> 2.0.0)
   sqlite3

app/controllers/bbb_controller.rb

@@ -91,7 +91,7 @@ class BbbController < ApplicationController
       # the user can join the meeting
       if user
         if bbb_res[:returncode] && current_user == user
-          JoinMeetingJob.perform_later(user.encrypted_id, params[:id])
+          JoinMeetingJob.perform_later(user, params[:id], base_url)
 
       # user will be waiting for a moderator
         else

app/jobs/end_meeting_job.rb

@@ -18,6 +18,9 @@ class EndMeetingJob < ApplicationJob
   queue_as :default
 
   def perform(room, meeting)
+
+    Rails.configuration.slack_notifier.ping I18n.t('slack.meeting_end', meeting: meeting) if !Rails.configuration.slack_notifier.nil?
+
     ActionCable.server.broadcast "#{room}-#{meeting}_meeting_updates_channel",
       action: 'meeting_ended'
   end

app/jobs/join_meeting_job.rb

@@ -17,8 +17,13 @@
 class JoinMeetingJob < ApplicationJob
   queue_as :default
 
-  def perform(room, meeting)
+def perform(user, meeting, base_url)
-    ActionCable.server.broadcast "#{room}-#{meeting}_meeting_updates_channel",
+
+    join_message = I18n.t('slack.meeting_join', user: user.name, meeting: meeting) + "(#{base_url})"
+    formatted = Slack::Notifier::Util::LinkFormatter.format(join_message)
+    Rails.configuration.slack_notifier.ping formatted if !Rails.configuration.slack_notifier.nil?
+
+    ActionCable.server.broadcast "#{user.encrypted_id}-#{meeting}_meeting_updates_channel",
       action: 'moderator_joined',
       moderator: 'joined'
   end

app/jobs/recording_updates_job.rb

@@ -22,6 +22,11 @@ class RecordingUpdatesJob < ApplicationJob
   def perform(room, record_id)
     recording = bbb_get_recordings({recordID: record_id})[:recordings].first
     full_id = "#{room}-#{recording[:metadata][:"meeting-name"]}"
+
+    change = (recording[:metadata][:"gl-listed"] == "true") ? I18n.t('slack.published') : I18n.t('slack.unpublished')
+    slack_message = I18n.t('slack.recording_visibility', meeting: recording[:metadata][:"meeting-name"], change: change)
+    Rails.configuration.slack_notifier.ping slack_message if !Rails.configuration.slack_notifier.nil?
+
     ActionCable.server.broadcast "#{room}_recording_updates_channel",
       action: 'update',
       id: record_id,

config/initializers/slack.rb

@@ -0,0 +1,36 @@
+# BigBlueButton open source conferencing system - http://www.bigbluebutton.org/.
+#
+# Copyright (c) 2016 BigBlueButton Inc. and by respective authors (see below).
+#
+# This program is free software; you can redistribute it and/or modify it under the
+# terms of the GNU Lesser General Public License as published by the Free Software
+# Foundation; either version 3.0 of the License, or (at your option) any later
+# version.
+#
+# BigBlueButton is distributed in the hope that it will be useful, but WITHOUT ANY
+# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+# PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License along
+# with BigBlueButton; if not, see <http://www.gnu.org/licenses/>.
+
+def uri?(string)
+  uri = URI.parse(string)
+  %w( http https ).include?(uri.scheme)
+rescue URI::BadURIError
+  false
+rescue URI::InvalidURIError
+  false
+end
+
+if !ENV['SLACK_WEBHOOK'].nil? && !ENV['SLACK_WEBHOOK'].empty? && uri?(ENV['SLACK_WEBHOOK']) then
+  # Initialize the slack notifier.
+  Rails.application.config.slack_notifier = Slack::Notifier.new ENV['SLACK_WEBHOOK'] do
+    defaults channel: ENV['SLACK_CHANNEL'],
+             username: "BigBlueButton",
+             icon_url: 'https://avatars3.githubusercontent.com/u/230228?v=3&s=200'
+  end
+else
+  # Initialize it to nil (slack not configured)
+  Rails.application.config.slack_notifier = nil
+end

config/locales/en-us.yml

@@ -134,6 +134,12 @@ en-US:
   return_to_room: Return to main page
   session_url_explanation: The meeting will be taking place using the following URL
   signin_text: Log in with %{provider}
+  slack:
+    meeting_end: "%{meeting} has ended."
+    meeting_join: "%{user} joined %{meeting}.\n[Click here join!]"
+    recording_visibility: "A recording of %{meeting} was %{change}"
+    published: published
+    unpublished: unpublished
   start: Start
   start_join: Start
   start_meeting: Start meeting

env

@@ -6,7 +6,6 @@
 #   docker run --rm bigbluebutton/greenlight rake secret
 #
 SECRET_KEY_BASE=
-
 # Step 2 - Enter credentials for your BigBlueButton Server
 #
 # The endpoint and secret from your bigbluebutton server.  To get these values, run
@@ -47,6 +46,16 @@ GOOGLE_OAUTH2_SECRET=
 # the application when recordings are done).
 GREENLIGHT_USE_WEBHOOKS=false
 
+# Slack Integration (optional)
+#
+#   You will need to register an incoming-webhook for your slack channel
+#   in order for GreenLight to post to it. You can do this by going
+#   to https://slack.com/apps/A0F7XDUAZ-incoming-webhooks, selecting your
+#   team and then selecting "Add Incoming WebHooks integration" on the
+#   desired channel. You will then need to paste the webhook below.
+#
+SLACK_WEBHOOK=
+SLACK_CHANNEL=
 
 # SMTP Mailer
 #