Added Vision API CLI sample.

samples/cli/lib/samples/vision.rb

@@ -0,0 +1,69 @@
+# 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/vision_v1'
+require 'base_cli'
+
+
+module Samples
+  # Examples for the Vision APIs
+  #
+  # Sample usage:
+  #
+  #     $ ./google-api-samples vision process ~/my_image.jpg --feature='TEXT_DETECTION'
+  #
+  class Vision < BaseCli
+    Vision = Google::Apis::VisionV1
+
+    attr_reader :image_path
+
+    desc 'process FILE', 'Process an image'
+    method_option :feature, type: :string, required: true
+    method_option :max_results, type: :numeric
+    def process(image_path)
+      @image_path = image_path
+
+      vision = Vision::VisionService.new
+      vision.key = api_key
+
+      result = vision.annotate_image(requests)
+      print "\nImage processed! - Response:\n\n"
+      p result
+    end
+
+  private
+
+    def image
+      @image ||= Vision::Image.new(content: File.open(image_path).read)
+    end
+
+    def feature
+      @feature ||= Vision::Feature.new(
+        type:        options[:feature],
+        max_results: options[:max_results] || 1
+      )
+    end
+
+    def requests
+      @requests ||= Vision::BatchAnnotateImagesRequest.new(
+        requests: [
+          Vision::AnnotateImageRequest.new(
+            image:    image,
+            features: [feature]
+          )
+        ]
+      )
+    end
+  end
+end