Google translate

Gemfile

@@ -47,8 +47,8 @@ gem 'hypdf', '~> 1.0.10'          # PDFInfoAgent
 # FIXME needs to loosen omniauth dependency
 gem 'weibo_2', github: 'dsander/weibo_2', branch: 'master'
 
-# GoogleCalendarPublishAgent
-gem "google-api-client", require: 'google/api_client'
+# GoogleCalendarPublishAgent and GoogleTranslateAgent
+gem 'google-api-client', '~> 0.7.1', require: 'google/api_client'
 
 # Twitter Agents
 gem 'twitter', '~> 5.14.0' # Must to be loaded before cantino-twitter-stream.

Gemfile.lock

@@ -628,7 +628,7 @@ DEPENDENCIES
   foreman (~> 0.63.0)
   geokit (~> 1.8.4)
   geokit-rails (~> 2.2.0)
-  google-api-client
+  google-api-client (~> 0.7.1)
   guard (~> 2.13.0)
   guard-livereload (~> 2.5.1)
   guard-rspec (~> 4.6.4)

app/models/agents/google_translation_agent.rb

@@ -0,0 +1,92 @@
+module Agents
+  class GoogleTranslationAgent < Agent
+    cannot_be_scheduled!
+
+    gem_dependency_check { defined?(Google) && defined?(Google::APIClient) }
+
+    description <<-MD
+      The Translation Agent will attempt to translate text between natural languages.
+
+      #{'## Include `google-api-client` in your Gemfile to use this Agent!' if dependencies_missing?}
+
+      Services are provided using Google Translate. You can [sign up](https://cloud.google.com/translate/) to get `google_api_key` which is required to use this agent.
+      The service is **not free**.
+
+      `to` must be filled with a [translator language code](https://cloud.google.com/translate/docs/languages).
+
+      `from` is the language translated from. If it's not specified, the API will attempt to detect the source language automatically and return it within the response.
+
+      Specify what you would like to translate in `content` field, you can use [Liquid](https://github.com/cantino/huginn/wiki/Formatting-Events-using-Liquid) specify which part of the payload you want to translate.
+
+      `expected_receive_period_in_days` is the maximum number of days you would allow to pass between events.
+    MD
+
+    event_description "User defined"
+
+    def default_options
+      {
+        'to' => "sv",
+        'from' => 'en',
+        'google_api_key' => '',
+        'expected_receive_period_in_days' => 1,
+        'content' => {
+          'text' => "{{message}}",
+          'moretext' => "{{another message}}"
+        }
+      }
+    end
+
+    def working?
+      last_receive_at && last_receive_at > interpolated['expected_receive_period_in_days'].to_i.days.ago && !recent_error_logs?
+    end
+
+    def validate_options
+      unless options['google_api_key'].present? && options['to'].present? && options['content'].present? && options['expected_receive_period_in_days'].present?
+        errors.add :base, "google_api_key, to, content and expected_receive_period_in_days are all required"
+      end
+    end
+
+    def translate_from
+      interpolated["from"].presence || 'en'
+    end
+
+    def receive(incoming_events)
+      incoming_events.each do |event|
+        translated_event = {}
+        opts = interpolated(event)
+        opts['content'].each_pair do |key, value|
+          result = translate(value)
+          translated_event[key] = result.data.translations.last.translated_text
+        end
+        create_event payload: translated_event
+      end
+    end
+
+    def google_client
+      @google_client ||= Google::APIClient.new(
+        {
+          application_name: "Huginn",
+          application_version: "0.0.1",
+          key: options['google_api_key'],
+          authorization: nil
+        }
+      )
+    end
+
+    def translate_service
+      @translate_service ||= google_client.discovered_api('translate','v2')
+    end
+
+    def translate(value)
+      google_client.execute(
+        api_method: translate_service.translations.list,
+        parameters: {
+          format: 'text',
+          source: translate_from,
+          target: options["to"],
+          q: value
+        }
+      )
+    end
+  end
+end