#299 - Add gmail send example

samples/Gemfile

@@ -3,4 +3,5 @@ source 'https://rubygems.org'
 gem 'google-api-client', '~> 0.9.pre4'
 gem 'thor', '~> 0.19'
 gem 'os', '~> 0.9'
+gem 'rmail', '~> 1.1'
 gem 'dotenv'

samples/lib/samples/gmail.rb

@@ -0,0 +1,50 @@
+# Copyright 2016 Google Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+require 'google/apis/gmail_v1'
+require 'base_cli'
+require 'rmail'
+
+module Samples
+  # Examples for the Gmail API
+  #
+  # Sample usage:
+  #
+  #     $ ./google-api-samples gmail send 'Hello there!' \
+  #       --to='recipient@example.com' --from='user@example.com' \
+  #       --subject='Hello'
+  #
+  class Gmail < BaseCli
+    Gmail = Google::Apis::GmailV1
+
+    desc 'send TEXT', 'Send a message with the gmail API'
+    method_option :to, type: :string, required: true
+    method_option :from, type: :string, required: true
+    method_option :subject, type: :string, required: true
+    def send(body)
+      gmail = Gmail::GmailService.new
+      gmail.authorization = user_credentials_for(Gmail::AUTH_SCOPE)
+
+      message = RMail::Message.new
+      message.header['To'] = options[:to]
+      message.header['From'] = options[:from]
+      message.header['Subject'] = options[:subject]
+      message.body = body
+
+      gmail.send_user_message('me',
+                              upload_source: StringIO.new(message.to_s),
+                              content_type: 'message/rfc822')
+    end
+  end
+end