Class: Utopia::Middleware::Localization

Inherits:
Object
  • Object
show all
Defined in:
lib/utopia/middleware/localization.rb,
lib/utopia/middleware/localization/name.rb

Defined Under Namespace

Modules: Name

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

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

Returns a new instance of Localization.



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# File 'lib/utopia/middleware/localization.rb', line 28

def initialize(app, options = {})
	@app = app

	@default_locale = options[:default] || "en"
	@all_locales = options[:all] || ["en"]
	
	@nonlocalized = options[:nonlocalized] || []
end

Instance Attribute Details

#all_locales ⇒ Object (readonly)

Returns the value of attribute all_locales.



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# File 'lib/utopia/middleware/localization.rb', line 45

def all_locales
  @all_locales
end

#default_locale ⇒ Object (readonly)

Returns the value of attribute default_locale.



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# File 'lib/utopia/middleware/localization.rb', line 46

def default_locale
  @default_locale
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/utopia/middleware/localization.rb', line 75

def call(env)
	# Check for a non-localized resource.
	if nonlocalized?(env)
		return @app.call(env)
	end
	
	# Otherwise, we need to check if the resource has been localized based on the request and referer parameters.
	path = Path.create(env["PATH_INFO"])
	env["utopia.localization"] = self

	referer_locale = named_locale(env['HTTP_REFERER'])
	request_locale = named_locale(path.basename)
	resource_name = Name.nonlocalized(path.basename, @all_locales).join(".")

	response = nil
	if request_locale
		env["utopia.current_locale"] = request_locale
		resource_path, response = check_resource(resource_name, request_locale, env)
	elsif referer_locale
		env["utopia.current_locale"] = referer_locale
		resource_path, response = check_resource(resource_name, referer_locale, env)
	end
	
	# If the previous checks failed, i.e. there was no request/referer locale 
	# or the response was 404 (i.e. no localised resource), we check for the
	# @default_locale
	if response == nil || response[0] >= 400
		env["utopia.current_locale"] = @default_locale
		resource_path, response = check_resource(resource_name, @default_locale, env)
	end

	# If the response is 2xx, we have a localised resource
	if response[0] < 300
		# If the original request was the same as the localized request,
		if path.basename == resource_path.basename
			# The resource URI is correct.
			return @app.call(env)
		else
			# Redirect to the correct resource URI.
			return [307, {"Location" => resource_path.to_s}, []]
		end
	elsif response[0] < 400
		# We have encountered a redirect while accessing the localized resource
		return response
	else
		# A localized resource was not found, return the unlocalised resource path,
		if path.basename == resource_name
			return @app.call(env)
		else
			return [307, {"Location" => (path.dirname + resource_name).to_s}, []]
		end
	end
end

#check_resource(resource_name, resource_locale, env) ⇒ Object 



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# File 'lib/utopia/middleware/localization.rb', line 48

def check_resource(resource_name, resource_locale, env)
	localized_name = Name.localized(resource_name, resource_locale, @all_locales).join(".")
	localized_path = Path.create(env["PATH_INFO"]).dirname + localized_name

	localization_probe = env.dup
	localization_probe["REQUEST_METHOD"] = "HEAD"
	localization_probe["PATH_INFO"] = localized_path.to_s

	# Find out if a resource exists for the requested localization
	return [localized_path, @app.call(localization_probe)]
end

#named_locale(resource_name) ⇒ Object 



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# File 'lib/utopia/middleware/localization.rb', line 37

def named_locale(resource_name)
	if resource_name
		Name.extract_locale(resource_name, @all_locales)
	else
		nil
	end
end

#nonlocalized?(env) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/utopia/middleware/localization.rb', line 60

def nonlocalized?(env)
	@nonlocalized.each do |pattern|
		case pattern
		when String
			return true if pattern == env["PATH_INFO"]
		when Regexp
			return true if pattern.match(env["PATH_INFO"])
		when pattern.respond_to?(:call)
			return true if pattern.call(env)
		end
	end
	
	return false
end