Class: Rack::I18nLocaleSwitcher

Inherits:
Object
  • Object
show all
Defined in:
lib/rack/i18n_locale_switcher.rb

Constant Summary collapse

LOCALE_PATTERN = 
'([a-zA-Z]{2,3})(-[a-zA-Z]{2,3})?'.freeze
SOURCES = 
[ :param, :path, :host, :header ].freeze
REDIRECTS = 
[ :param, :path, :host ].freeze
DEFAULT_OPTIONS = 
{
  :param     => 'locale',
  :source    => SOURCES,
  :redirect  => nil,
  :canonical => false,
  :except    => nil
}.freeze

Instance Method Summary collapse

Constructor Details

#initialize(app, options = {}) ⇒ I18nLocaleSwitcher

Returns a new instance of I18nLocaleSwitcher.



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# File 'lib/rack/i18n_locale_switcher.rb', line 19

def initialize(app, options = {})
  @app = app
  
  invalid_options = (options.keys - DEFAULT_OPTIONS.keys)
  
  if invalid_options.any?
    raise ArgumentError, "Invalid option(s) #{ invalid_options.map(&:inspect).join(', ') }" 
  end
  
  options = DEFAULT_OPTIONS.merge(options)

  @param     = options[:param]
  @canonical = options[:canonical]
  @except    = options[:except]

  @sources = options[:source]      
  @sources = Array(@sources) unless @sources.is_a?(Array)
  
  invalid_sources = @sources - SOURCES

  if invalid_sources.any?
    raise ArgumentError, "Invalid source(s) #{ invalid_sources.map(&:inspect).join(', ') }" 
  end

  @redirect = options[:redirect]

  unless @redirect.nil? || REDIRECTS.include?(@redirect)
    raise ArgumentError, "Invalid redirect option #{ @redirect.inspect }" 
  end
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/rack/i18n_locale_switcher.rb', line 50

def call(env)
  return @app.call(env) if env['PATH_INFO'] =~ @except
  
  I18n.locale = I18n.default_locale

  env['PATH_INFO'].gsub!(/([^\/])\/$/, '\1')

  request = Rack::Request.new(env)
  request_url = request.url

  source = nil
  @sources.each do |src|
    locale = send(:"extract_locale_from_#{src}", env)
    if locale && source.nil?
      source = src
      I18n.locale = locale
    end
  end

  if @redirect
    unless @canonical && I18n.locale == I18n.default_locale
      send(:"set_locale_in_#@redirect", env)
    end
  
    if request.url != request_url
      env['PATH_INFO'] = '' if env['PATH_INFO'] == '/'
      return [ 301, { 'Location' => request.url }, ["Redirecting"]]
    end
  end
  
  @app.call(env)
end