add google pubsub integration

Gemfile

@@ -54,6 +54,7 @@ gem 'aws-sdk', '~> 2'
 gem 'responders'
 gem 'highline'
 gem 'dtext_rb', :git => "https://github.com/r888888888/dtext_rb.git", :require => "dtext"
+gem 'google-api-client'
 
 # needed for looser jpeg header compat
 gem 'ruby-imagespec', :require => "image_spec", :git => "https://github.com/r888888888/ruby-imagespec.git", :branch => "exif-fixes"

Gemfile.lock

@@ -138,6 +138,24 @@ GEM
       oauth2 (~> 1.0.0)
     globalid (0.3.6)
       activesupport (>= 4.1.0)
+    google-api-client (0.9.9)
+      addressable (~> 2.3)
+      googleauth (~> 0.5)
+      httpclient (~> 2.7)
+      hurley (~> 0.1)
+      memoist (~> 0.11)
+      mime-types (>= 1.6)
+      representable (~> 2.3.0)
+      retriable (~> 2.0)
+      thor (~> 0.19)
+    googleauth (0.5.1)
+      faraday (~> 0.9)
+      jwt (~> 1.4)
+      logging (~> 2.0)
+      memoist (~> 0.12)
+      multi_json (~> 1.11)
+      os (~> 0.9)
+      signet (~> 0.7)
     hashie (3.4.4)
     highline (1.7.8)
     hike (1.2.3)
@@ -146,6 +164,8 @@ GEM
     http-cookie (1.0.2)
       domain_name (~> 0.5)
     http_parser.rb (0.6.0)
+    httpclient (2.8.0)
+    hurley (0.2)
     i18n (0.7.0)
     jeweler (2.1.1)
       builder
@@ -163,6 +183,10 @@ GEM
     jwt (1.5.4)
     kgio (2.9.3)
     libv8 (3.16.14.11)
+    little-plugger (1.1.4)
+    logging (2.1.0)
+      little-plugger (~> 1.1)
+      multi_json (~> 1.10)
     loofah (2.0.3)
       nokogiri (>= 1.5.9)
     mail (2.6.3)
@@ -177,6 +201,7 @@ GEM
       ntlm-http (~> 0.1, >= 0.1.1)
       webrobots (>= 0.0.9, < 0.2)
     memcache-client (1.8.5)
+    memoist (0.14.0)
     memoizable (0.4.2)
       thread_safe (~> 0.3, >= 0.3.1)
     metaclass (0.0.4)
@@ -214,6 +239,7 @@ GEM
       multi_json (~> 1.3)
       multi_xml (~> 0.5)
       rack (~> 1.2)
+    os (0.9.6)
     pg (0.18.2)
     pg (0.18.2-x64-mingw32)
     pkg-config (1.1.7)
@@ -263,6 +289,8 @@ GEM
     rdoc (4.2.2)
       json (~> 1.4)
     ref (2.0.0)
+    representable (2.3.0)
+      uber (~> 0.0.7)
     responders (2.1.0)
       railties (>= 4.2.0, < 5)
     rest-client (1.8.0)
@@ -274,6 +302,7 @@ GEM
       http-cookie (>= 1.0.2, < 2.0)
       mime-types (>= 1.16, < 3.0)
       netrc (~> 0.7)
+    retriable (2.1.0)
     rmagick (2.15.4)
     ruby-prof (0.15.8)
     rubyzip (1.1.7)
@@ -295,6 +324,11 @@ GEM
     shoulda-context (1.2.1)
     shoulda-matchers (2.8.0)
       activesupport (>= 3.0.0)
+    signet (0.7.2)
+      addressable (~> 2.3)
+      faraday (~> 0.9)
+      jwt (~> 1.5)
+      multi_json (~> 1.10)
     simple_form (3.1.0)
       actionpack (~> 4.0)
       activemodel (~> 4.0)
@@ -348,6 +382,7 @@ GEM
       thread_safe (~> 0.1)
     tzinfo-data (1.2015.6)
       tzinfo (>= 1.0.0)
+    uber (0.0.15)
     uglifier (2.7.1)
       execjs (>= 0.3.0)
       json (>= 1.8.0)
@@ -392,6 +427,7 @@ DEPENDENCIES
   factory_girl
   ffaker
   gctools
+  google-api-client
   highline
   kgio
   mechanize

app/models/post.rb

@@ -1,4 +1,5 @@
 require 'danbooru/has_bit_flags'
+require 'google/apis/pubsub_v1'
 
 class Post < ActiveRecord::Base
   class ApprovalError < Exception ; end
@@ -14,7 +15,7 @@ class Post < ActiveRecord::Base
   after_save :apply_post_metatags
   after_save :expire_essential_tag_string_cache
   after_create :update_iqdb_async
-  after_commit :pg_notify
+  after_commit :notify_pubsub
   before_save :merge_old_changes
   before_save :normalize_tags
   before_save :update_tag_post_counts
@@ -1373,8 +1374,16 @@ class Post < ActiveRecord::Base
       save!
     end
 
-    def pg_notify
+    def notify_pubsub
-      execute_sql("notify changes_posts, '#{id}'")
+      return unless Danbooru.config.google_api_project
+
+      require 'google/apis/pubsub_v1'
+      pubsub = Google::Apis::PubsubV1::PubsubService.new
+      pubsub.authorization = Google::Auth.get_application_default([Google::Apis::PubsubV1::AUTH_PUBSUB])
+      topic = "projects/#{Danbooru.config.google_api_project}/topics/post_updates"
+      request = Google::Apis::PubsubV1::PublishRequest.new(messages: [])
+      request.messages << Google::Apis::PubsubV1::Message.new(data: id.to_s)
+      pubsub.publish_topic(topic, request)
     end
   end
 
@@ -1744,13 +1753,13 @@ class Post < ActiveRecord::Base
 
   def update_column(name, value)
     ret = super(name, value)
-    pg_notify
+    notify_pubsub
     ret
   end
 
   def update_columns(attributes)
     ret = super(attributes)
-    pg_notify
+    notify_pubsub
     ret
   end
 end

config/danbooru_default_config.rb

@@ -417,6 +417,10 @@ module Danbooru
     def listbooru_auth_key
     end
 
+    # google api options
+    def google_api_project
+    end
+
     # AWS config options
     def aws_access_key_id
       nil