show action initial implementation

.gitignore

@@ -21,9 +21,10 @@
 /yarn-error.log
 
 .byebug_history
+.pry_history
 
 coverage/*
 
 config/settings.local.yml
 config/settings/*.local.yml
-config/environments/*.local.yml
+config/environments/*.local.yml

Gemfile

@@ -5,6 +5,8 @@ git_source(:github) do |repo_name|
   "https://github.com/#{repo_name}.git"
 end
 
+# work with Moab Objects
+gem 'moab-versioning'
 
 # Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
 gem 'rails', '~> 5.1.3'
@@ -36,6 +38,8 @@ gem 'jbuilder', '~> 2.5'
 group :development, :test do
   # Call 'byebug' anywhere in the code to stop execution and get a debugger console
   gem 'byebug', platforms: [:mri, :mingw, :x64_mingw]
+  # Call 'binding.pry' anywhere in the code to stop execution and get a pry console
+  gem 'pry-byebug', require: false
   # Adds support for Capybara system testing and selenium driver
   gem 'capybara', '~> 2.13'
   gem 'selenium-webdriver'

Gemfile.lock

@@ -53,6 +53,7 @@ GEM
       xpath (~> 2.0)
     childprocess (0.7.1)
       ffi (~> 1.0, >= 1.0.11)
+    coderay (1.1.1)
     coffee-rails (4.2.2)
       coffee-script (>= 2.2.0)
       railties (>= 4.0.0)
@@ -61,6 +62,8 @@ GEM
       execjs
     coffee-script-source (1.12.2)
     concurrent-ruby (1.0.5)
+    confstruct (1.0.2)
+      hashie (~> 3.3)
     coveralls (0.7.1)
       multi_json (~> 1.3)
       rest-client
@@ -76,6 +79,7 @@ GEM
     ffi (1.9.18)
     globalid (0.4.0)
       activesupport (>= 4.2.0)
+    hashie (3.5.6)
     http-cookie (1.0.3)
       domain_name (~> 0.5)
     i18n (0.8.6)
@@ -98,11 +102,26 @@ GEM
     mini_mime (0.1.4)
     mini_portile2 (2.2.0)
     minitest (5.10.3)
+    moab-versioning (2.0.0)
+      confstruct
+      json
+      nokogiri
+      nokogiri-happymapper
+      systemu
     multi_json (1.12.1)
     netrc (0.11.0)
     nio4r (2.1.0)
     nokogiri (1.8.0)
       mini_portile2 (~> 2.2.0)
+    nokogiri-happymapper (0.5.9)
+      nokogiri (~> 1.5)
+    pry (0.10.4)
+      coderay (~> 1.1.0)
+      method_source (~> 0.8.1)
+      slop (~> 3.4)
+    pry-byebug (3.4.2)
+      byebug (~> 9.0)
+      pry (~> 0.10)
     public_suffix (2.0.5)
     puma (3.9.1)
     rack (2.0.3)
@@ -181,6 +200,7 @@ GEM
       json (>= 1.8, < 3)
       simplecov-html (~> 0.10.0)
     simplecov-html (0.10.2)
+    slop (3.6.0)
     spring (2.0.2)
       activesupport (>= 4.2)
     spring-watcher-listen (2.0.1)
@@ -194,6 +214,7 @@ GEM
       activesupport (>= 4.0)
       sprockets (>= 3.0.0)
     sqlite3 (1.3.13)
+    systemu (2.6.5)
     term-ansicolor (1.6.0)
       tins (~> 1.0)
     thor (0.20.0)
@@ -231,6 +252,8 @@ DEPENDENCIES
   coveralls
   jbuilder (~> 2.5)
   listen (>= 3.0.5, < 3.2)
+  moab-versioning
+  pry-byebug
   puma (~> 3.7)
   rails (~> 5.1.3)
   rails-controller-testing

app/controllers/moab_storage_controller.rb

@@ -1,12 +1,33 @@
+require 'moab/stanford'
+
 # API to retrieve data from Moab Object Store
 class MoabStorageController < ApplicationController
-
   def index
-    storage_root = 'spec/fixtures/moab_storage_root'
-    @stored_druids = Dir.glob("#{storage_root}/**/[a-z][a-z]*[0-9]").map {|d| d.split("/").last}
+    @stored_druids = druids_from_storage_root
     respond_to do |format|
       format.xml { render xml: @stored_druids }
       format.all { render json: @stored_druids, content_type: 'application/json' }
     end
   end
+
+  def show
+    version_metadata_file = Stanford::StorageServices.version_metadata(params['id'])
+    vm = Moab::VersionMetadata.parse(version_metadata_file.read)
+    # FIXME: moab gem likely has a better way to get the latest version (github issue #24)
+    @output = { current_version: vm.versions.last.version_id }
+    respond_to do |format|
+      format.xml { render xml: @output }
+      format.all { render json: @output, content_type: 'application/json' }
+    end
+  end
+
+  private
+
+  def druids_from_storage_root
+    druids ||= begin
+      @storage_root ||= "#{Moab::Config.storage_roots}/#{Moab::Config.storage_trunk}"
+      Dir.glob("#{@storage_root}/**/[a-z][a-z]*[0-9]").map {|d| d.split("/").last}
+    end
+  end
+
 end

config/application.rb

@@ -16,3 +16,10 @@ class Application < Rails::Application
     # -- all .rb files in that directory are automatically loaded.
   end
 end
+
+require 'moab'
+Moab::Config.configure do
+  # FIXME: put this hardcoded dir in settings.yml file (github issue #21)
+  storage_roots File.join(File.dirname(__FILE__), '..', 'spec','fixtures')
+  storage_trunk 'moab_storage_root'
+end

config/routes.rb

@@ -1,5 +1,7 @@
 Rails.application.routes.draw do
   get 'moab_storage/index'
 
+  get 'moab_storage/show/:id', to: 'moab_storage#show'
+
   # For details on the DSL available within this file, see http://guides.rubyonrails.org/routing.html
 end

spec/controllers/moab_storage_controller_spec.rb

@@ -22,6 +22,10 @@
         expect(assigns(:stored_druids).first).to be_an_instance_of String
       end
     end
+    it 'assigns @storage_root correctly' do
+      get :index
+      expect(assigns(:storage_root)).to eq "#{Moab::Config.storage_roots}/#{Moab::Config.storage_trunk}"
+    end
     it 'returns json by default' do
       get :index
       expect(response.content_type).to eq "application/json"
@@ -35,4 +39,34 @@
       expect(response.content_type).to eq "application/xml"
     end
   end
+
+  describe "GET #show" do
+    let(:fixture_druid) { 'ct764fs4485' }
+    it "returns http success status code" do
+      get :show, params: { id: fixture_druid }
+      expect(response).to have_http_status(:success)
+    end
+    context 'assigns @output correctly' do
+      it 'Hash' do
+        get :show, params: { id: fixture_druid }
+        expect(assigns(:output)).to be_an_instance_of Hash
+      end
+      it 'current_version' do
+        get :show, params: { id: fixture_druid }
+        expect(assigns(:output)[:current_version]).to eq 10
+      end
+    end
+    it 'returns json by default' do
+      get :show, params: { id: fixture_druid }
+      expect(response.content_type).to eq "application/json"
+    end
+    it 'returns json when requested' do
+      get :show, params: { id: fixture_druid, format: :json }
+      expect(response.content_type).to eq "application/json"
+    end
+    it 'returns xml when requested' do
+      get :show, params: { id: fixture_druid, format: :xml }
+      expect(response.content_type).to eq "application/xml"
+    end
+  end
 end