Add Tweet Neuron

brain/Gemfile

@@ -20,6 +20,9 @@ gem 'faraday_middleware'
 # Astricon Schedule Neuron
 gem 'blurrily'
 
+# Tweet gem
+gem 'twitter'
+
 group :development, :test do
   gem 'rspec'
   gem 'guard'

brain/Gemfile.lock

@@ -142,6 +142,7 @@ GEM
     ruby_speech (2.3.0)
       activesupport (>= 3.0.7, < 5.0.0)
       nokogiri (~> 1.6)
+    simple_oauth (0.2.0)
     slop (3.4.6)
     state_machine (1.2.0)
     thor (0.18.1)
@@ -150,6 +151,10 @@ GEM
     timecop (0.6.3)
     timers (1.1.0)
     toadhopper (2.1)
+    twitter (4.8.1)
+      faraday (~> 0.8, < 0.10)
+      multi_json (~> 1.0)
+      simple_oauth (~> 0.2)
     tzinfo (0.3.37)
     virtus (0.5.2)
       backports (~> 2.6.1)
@@ -177,4 +182,5 @@ DEPENDENCIES
   pipejump
   rspec
   timecop
+  twitter
   webmock

brain/lib/app.rb

@@ -8,6 +8,7 @@
 require_relative 'mirror_mirror_neuron'
 require_relative 'astricon_now_speaking'
 require_relative 'time_neuron'
+require_relative 'tweet_neuron'
 
 class App < Adhearsion::Plugin
   init :brain do
@@ -20,6 +21,7 @@ class App < Adhearsion::Plugin
     @brain.add_neuron MirrorMirrorNeuron.new
     @brain.add_neuron AstriconNowSpeaking.new
     @brain.add_neuron TimeNeuron.new
+    @brain.add_neuron TweetNeuron.new
   end
 
   run :brain do

brain/lib/tweet_neuron.rb

@@ -0,0 +1,32 @@
+require 'twitter'
+
+class TweetNeuron
+  def initialize
+  end
+
+  def intent
+    'tweet'
+  end
+
+  def reply(message, interpretation)
+    client = get_twitter_client(message.user)
+    return "You must log in via Twitter so I can help you tweet." unless client
+    entities = interpretation['outcome']['entities']
+    return "You have to tell me what to tweet!" unless entities.has_key? 'message'
+
+    client.update entities['message']['value']
+    "Message sent."
+  end
+
+  def get_twitter_client(user)
+    grant = user['auth_grants'].select { |grant| grant[:provider] == :twitter }.first
+    if grant
+      Twitter::Client.new do |config|
+        config.consumer_key        = ENV['TWITTER_KEY']
+        config.consumer_secret     = ENV['TWITTER_SECRET']
+        config.access_token        = grant[:credentials]['token']
+        config.access_token_secret = grant[:credentials]['secret']
+      end
+    end
+  end
+end

brain/spec/lib/tweet_neuron_spec.rb

@@ -0,0 +1,32 @@
+require 'spec_helper'
+
+describe TweetNeuron do
+  include NeuronMatchers
+
+  let(:subject) { TweetNeuron.new }
+
+  it "should return an error message if no tweet is provided" do
+    interpretation = wit_interpretation 'Tweet this', 'tweet'
+    should handle_message('Tweet this', :default_user, interpretation)
+      .and_respond_with("You have to tell me what to tweet!")
+  end
+
+  it "should send a tweet" do
+    interpretation = wit_interpretation 'Tweet Hello from AstriCon', 'tweet', message: 'Hello from AstriCon'
+    should handle_message('Tweet this Hello from Astricon', :default_user, interpretation)
+      .and_respond_with("Message sent.")
+  end
+
+  context "getting a Twitter client" do
+    it "should return nil if the user has no credentials for Twitter" do
+      subject.get_twitter_client('auth_grants' => []).should be nil
+    end
+
+    it "should return an instance of Twitter::Client if credentials are supplied" do
+      user = {'auth_grants' => [{provider: :twitter, credentials: {'token' => 'abcd', 'secret' => 'efgh'}}]}
+      subject.get_twitter_client(user).should be_a Twitter::Client
+    end
+  end
+
+end
+