PoC Pong Slack botzj-slack-bot

This is a very basic Proof-of-Concept for a Slack bot in GitLab. Main
focus of this commit just to get something running and iterate from
this point on.

If you'd like to test this, you'll need a Slack team and a bot with a
token/key. In case you're a GitLab team member, I can supply these to
you.

[ci skip]

4 files changed, 60 insertions, 0 deletions

diff --git a/Gemfile b/Gemfile
index 620338e5997..939a92ce1e8 100644
--- a/Gemfile
+++ b/Gemfile
@@ -172,6 +172,9 @@ gem 'gemnasium-gitlab-service', '~> 0.2'
 # Slack integration
 gem 'slack-notifier', '~> 1.2.0'
 
+# Slack chatbot
+gem 'slack-bot-server'
+
 # Asana integration
 gem 'asana', '~> 0.4.0'
 
diff --git a/Gemfile.lock b/Gemfile.lock
index 28ede86b3ba..36251ad0280 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -204,6 +204,9 @@ GEM
     faraday_middleware-multi_json (0.0.6)
       faraday_middleware
       multi_json
+    faye-websocket (0.10.4)
+      eventmachine (>= 0.12.0)
+      websocket-driver (>= 0.5.1)
     ffaker (2.0.0)
     ffi (1.9.10)
     flay (2.6.1)
@@ -290,6 +293,7 @@ GEM
       omniauth (~> 1.0)
       pyu-ruby-sasl (~> 0.0.3.1)
       rubyntlm (~> 0.3)
+    gli (2.14.0)
     globalid (0.3.7)
       activesupport (>= 4.1.0)
     gollum-grit_adapter (1.0.1)
@@ -683,7 +687,19 @@ GEM
       rack (~> 1.5)
       rack-protection (~> 1.4)
       tilt (>= 1.3, < 3)
+    slack-bot-server (0.4.7)
+      faye-websocket (~> 0.10)
+      multi_json
+      slack-ruby-client (~> 0.7)
     slack-notifier (1.2.1)
+    slack-ruby-client (0.7.7)
+      activesupport
+      faraday
+      faraday_middleware
+      gli
+      hashie
+      json
+      websocket-driver
     slop (3.6.0)
     spinach (0.8.10)
       colorize
@@ -953,6 +969,7 @@ DEPENDENCIES
   sidekiq-cron (~> 0.4.0)
   simplecov (= 0.12.0)
   sinatra (~> 1.4.4)
+  slack-bot-server
   slack-notifier (~> 1.2.0)
   spinach-rails (~> 0.2.1)
   spinach-rerun-reporter (~> 0.0.2)
diff --git a/bin/setup_bot b/bin/setup_bot
new file mode 100755
index 00000000000..4de2783a1ce
--- /dev/null
+++ b/bin/setup_bot
@@ -0,0 +1,10 @@
+#!/usr/bin/env ruby
+
+require 'slack_bot_server'
+require 'slack_bot_server/redis_queue'
+require 'slack_bot_server/remote_control'
+
+queue = SlackBotServer::RedisQueue.new
+slack_remote = SlackBotServer::RemoteControl.new(queue: queue)
+
+slack_remote.add_bot(ENV['SLACK_BOT_KEY'])
diff --git a/bin/slack_server b/bin/slack_server
new file mode 100755
index 00000000000..2e6a0e08c13
--- /dev/null
+++ b/bin/slack_server
@@ -0,0 +1,30 @@
+#!/usr/bin/env ruby
+
+require 'sidekiq'
+
+require 'slack_bot_server'
+require 'slack_bot_server/redis_queue'
+
+module SlackBotServer
+  class PongServer < SlackBotServer::Bot
+    username 'Tanuki'
+
+    on_mention do |data|
+      reply text: "PONG"
+    end
+
+    on_im do |data|
+      reply text: "PONG"
+    end
+  end
+end
+
+queue = SlackBotServer::RedisQueue.new
+server = SlackBotServer::Server.new(queue: queue)
+
+server.on_add do |token|
+  SlackBotServer::PongServer.new(token: token)
+end
+
+# This is a blocking call, code placed after this line will not be executed
+server.start