From fd6c9ed6769641cd214781c74551e944919171f8 Mon Sep 17 00:00:00 2001
From: Joel Low <joel@joelsplace.sg>
Date: Wed, 13 Jan 2016 16:38:50 +0800
Subject: [PATCH] Import the language definitions from the Web application.

---
 .gitignore                                    |  1 +
 coursemology-polyglot.gemspec                 |  2 +
 lib/coursemology/polyglot.rb                  | 14 ++++--
 lib/coursemology/polyglot/language.rb         | 45 +++++++++++++++++++
 lib/coursemology/polyglot/language/python.rb  | 17 +++++++
 .../polyglot/language/python_spec.rb          | 15 +++++++
 spec/coursemology/polyglot/language_spec.rb   | 21 +++++++++
 spec/coursemology/polyglot_spec.rb            |  4 --
 spec/spec_helper.rb                           |  4 ++
 9 files changed, 116 insertions(+), 7 deletions(-)
 create mode 100644 lib/coursemology/polyglot/language.rb
 create mode 100644 lib/coursemology/polyglot/language/python.rb
 create mode 100644 spec/coursemology/polyglot/language/python_spec.rb
 create mode 100644 spec/coursemology/polyglot/language_spec.rb

diff --git a/.gitignore b/.gitignore
index db4592f..022fdb2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -7,6 +7,7 @@
 # Ignore bundler config and gems.
 /.bundle
 /vendor/bundle
+/Gemfile.lock
 
 # Ignore generated code coverage information
 /spec/coverage/*
diff --git a/coursemology-polyglot.gemspec b/coursemology-polyglot.gemspec
index 3d05c24..cac4cca 100644
--- a/coursemology-polyglot.gemspec
+++ b/coursemology-polyglot.gemspec
@@ -27,4 +27,6 @@ programming languages supported in Coursemology.
   spec.add_development_dependency 'simplecov'
   spec.add_development_dependency 'coveralls'
   spec.add_development_dependency 'codeclimate-test-reporter'
+
+  spec.add_dependency 'activesupport', '~> 4.2.0', '>= 4.2.2'
 end
diff --git a/lib/coursemology/polyglot.rb b/lib/coursemology/polyglot.rb
index b40ae87..40e7b5b 100644
--- a/lib/coursemology/polyglot.rb
+++ b/lib/coursemology/polyglot.rb
@@ -1,7 +1,15 @@
+require 'active_support/all'
 require 'coursemology/polyglot/version'
 
-module Coursemology
-  module Polyglot
-    # Your code goes here...
+module Coursemology::Polyglot
+  extend ActiveSupport::Autoload
+
+  eager_autoload do
+    autoload :Language
+  end
+
+  def self.eager_load!
+    super
+    Coursemology::Polyglot::Language.eager_load!
   end
 end
diff --git a/lib/coursemology/polyglot/language.rb b/lib/coursemology/polyglot/language.rb
new file mode 100644
index 0000000..7063d13
--- /dev/null
+++ b/lib/coursemology/polyglot/language.rb
@@ -0,0 +1,45 @@
+if defined?(ActiveRecord)
+  # :nocov:
+  # TODO: This is for compatibility with the Web application. A future refactoring might be able
+  # to remove this dependency.
+  class Coursemology::Polyglot::Language < ActiveRecord::Base; end
+  # :nocov:
+else
+  class Coursemology::Polyglot::Language; end
+end
+
+class Coursemology::Polyglot::Language
+  extend ActiveSupport::Autoload
+
+  eager_autoload do
+    autoload :Python
+  end
+
+  # Gets the display name of the language.
+  #
+  # @abstract
+  # @return [String]
+  def self.display_name
+    fail NotImplementedError
+  end
+
+  # The stylesheets that need to be packaged with the rest of the application.
+  #
+  # This should include the Rouge/Pygments stylesheet for formatting code.
+  #
+  # @abstract
+  # @return [Array<String>]
+  def self.stylesheets
+    fail NotImplementedError
+  end
+
+  # The script files that need to be packaged with the rest of the application.
+  #
+  # This should include the Ace mode for the language.
+  #
+  # @abstract
+  # @return [Array<String>]
+  def self.javascript
+    fail NotImplementedError
+  end
+end
diff --git a/lib/coursemology/polyglot/language/python.rb b/lib/coursemology/polyglot/language/python.rb
new file mode 100644
index 0000000..6b0750f
--- /dev/null
+++ b/lib/coursemology/polyglot/language/python.rb
@@ -0,0 +1,17 @@
+class Coursemology::Polyglot::Language::Python < Coursemology::Polyglot::Language
+  class Python2Point7 < Coursemology::Polyglot::Language::Python
+    class << self
+      def display_name
+        'Python 2.7'
+      end
+    end
+  end
+
+  class Python3Point4 < Coursemology::Polyglot::Language::Python
+    class << self
+      def display_name
+        'Python 3.4'
+      end
+    end
+  end
+end
diff --git a/spec/coursemology/polyglot/language/python_spec.rb b/spec/coursemology/polyglot/language/python_spec.rb
new file mode 100644
index 0000000..f449e78
--- /dev/null
+++ b/spec/coursemology/polyglot/language/python_spec.rb
@@ -0,0 +1,15 @@
+require 'spec_helper'
+
+RSpec.describe Coursemology::Polyglot::Language::Python do
+  describe Coursemology::Polyglot::Language::Python::Python2Point7 do
+    it 'returns the correct display name' do
+      expect(subject.class.display_name).to eq('Python 2.7')
+    end
+  end
+
+  describe Coursemology::Polyglot::Language::Python::Python3Point4 do
+    it 'returns the correct display name' do
+      expect(subject.class.display_name).to eq('Python 3.4')
+    end
+  end
+end
diff --git a/spec/coursemology/polyglot/language_spec.rb b/spec/coursemology/polyglot/language_spec.rb
new file mode 100644
index 0000000..58c947a
--- /dev/null
+++ b/spec/coursemology/polyglot/language_spec.rb
@@ -0,0 +1,21 @@
+require 'spec_helper'
+
+RSpec.describe Coursemology::Polyglot::Language do
+  describe '.display_name' do
+    it 'fails with NotImplementedError' do
+      expect { subject.class.display_name }.to raise_error(NotImplementedError)
+    end
+  end
+
+  describe '.stylesheets' do
+    it 'fails with NotImplementedError' do
+      expect { subject.class.stylesheets }.to raise_error(NotImplementedError)
+    end
+  end
+
+  describe '.javascript' do
+    it 'fails with NotImplementedError' do
+      expect { subject.class.javascript }.to raise_error(NotImplementedError)
+    end
+  end
+end
diff --git a/spec/coursemology/polyglot_spec.rb b/spec/coursemology/polyglot_spec.rb
index 67b2ef3..aa29be5 100644
--- a/spec/coursemology/polyglot_spec.rb
+++ b/spec/coursemology/polyglot_spec.rb
@@ -4,8 +4,4 @@
   it 'has a version number' do
     expect(Coursemology::Polyglot::VERSION).not_to be nil
   end
-
-  it 'does something useful' do
-    expect(false).to eq(true)
-  end
 end
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index 0dc30d8..893d1d2 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -93,4 +93,8 @@
   # test failures related to randomization by passing the same `--seed` value
   # as the one that triggered the failure.
   Kernel.srand config.seed
+
+  config.before(:suite) do
+    Coursemology::Polyglot.eager_load!
+  end
 end