Check in YML-XML conversion scripts

lib/i18n_converter.rb

@@ -0,0 +1,39 @@
+require 'yaml'
+require 'active_support/core_ext/hash/conversions'
+
+class I18nConverter
+  def initialize(stdin:, stdout:)
+    @stdin = stdin
+    @stdout = stdout
+  end
+
+  def xml_to_yml
+    return if bad_usage?(in_format: :xml, out_format: :yml)
+
+    data = Hash.from_xml(stdin.read)
+    data_hash = data['hash']
+    data = data_hash if data_hash
+    stdout.puts YAML.dump(data)
+  end
+
+  def yml_to_xml
+    return if bad_usage?(in_format: :yml, out_format: :xml)
+
+    data = YAML.safe_load(stdin.read)
+    stdout.puts data.to_xml
+  end
+
+  private
+
+  attr_reader :stdin, :stdout
+
+  def bad_usage?(in_format:, out_format:)
+    return false unless stdin.tty?
+
+    stdout.puts "Usage: cat en.#{in_format} | #{$PROGRAM_NAME} > output.#{out_format}"
+    # rubocop:disable Rails/Exit
+    exit 1
+    # rubocop:enable Rails/Exit
+    true
+  end
+end

scripts/i18n-xml-to-yml

@@ -0,0 +1,5 @@
+#!/usr/bin/env ruby
+$LOAD_PATH.unshift(File.expand_path('../lib', File.dirname(__FILE__)))
+require 'i18n_converter'
+
+I18nConverter.new(stdin: STDIN, stdout: STDOUT).xml_to_yml

scripts/i18n-yml-to-xml

@@ -0,0 +1,5 @@
+#!/usr/bin/env ruby
+$LOAD_PATH.unshift(File.expand_path('../lib', File.dirname(__FILE__)))
+require 'i18n_converter'
+
+I18nConverter.new(stdin: STDIN, stdout: STDOUT).yml_to_xml

spec/lib/i18n_converter_spec.rb

@@ -0,0 +1,81 @@
+require 'spec_helper'
+require 'i18n_converter'
+
+RSpec.describe I18nConverter do
+  let(:translation_yml) do
+    <<~YAML
+      ---
+      en:
+        test:
+          key: Some string
+        other_test:
+          other_key: Other key
+          some_key: Some key
+    YAML
+  end
+
+  let(:translation_xml) do
+    <<~XML
+      <?xml version="1.0" encoding="UTF-8"?>
+      <hash>
+        <en>
+          <test>
+            <key>Some string</key>
+          </test>
+          <other-test>
+            <other-key>Other key</other-key>
+            <some-key>Some key</some-key>
+          </other-test>
+        </en>
+      </hash>
+    XML
+  end
+
+  subject(:converter) { I18nConverter.new(stdin: stdin, stdout: stdout) }
+
+  describe '.yml_to_xml' do
+    let(:stdout) { StringIO.new }
+    let(:stdin) { StringIO.new(translation_yml) }
+
+    context 'with a TTY on STDIN' do
+      let(:stdin) { instance_double('IO', tty?: true) }
+
+      it 'prints an error and exits' do
+        expect(converter).to receive(:exit).with(1)
+
+        converter.yml_to_xml
+
+        expect(stdout.string.chomp).to eq("Usage: cat en.yml | #{$PROGRAM_NAME} > output.xml")
+      end
+    end
+
+    it 'outputs XML' do
+      converter.yml_to_xml
+
+      expect(stdout.string).to eq(translation_xml)
+    end
+  end
+
+  describe '.xml_to_yml' do
+    let(:stdout) { StringIO.new }
+    let(:stdin) { StringIO.new(translation_xml) }
+
+    context 'with a TTY on STDIN' do
+      let(:stdin) { instance_double('IO', tty?: true) }
+
+      it 'prints an error and exits' do
+        expect(converter).to receive(:exit).with(1)
+
+        converter.xml_to_yml
+
+        expect(stdout.string.chomp).to eq("Usage: cat en.xml | #{$PROGRAM_NAME} > output.yml")
+      end
+    end
+
+    it 'outputs YML' do
+      converter.xml_to_yml
+
+      expect(stdout.string).to eq(translation_yml)
+    end
+  end
+end