implementation of the link_to liquid tag (wip)

did committed Jul 02, 2013

commit 45d8a1fe8223539304210a8234f652884469e0d2

Showing 7 changed files with 176 additions and 5 deletions

locomotive/wagon/liquid.rb b/lib/locomotive/wagon/liquid.rb +1 -0

@@	@@ -1,6 +1,7 @@
	require 'liquid'
	require 'locomotive/mounter'
	require 'locomotive/wagon/liquid/drops/base'
+	require 'locomotive/wagon/liquid/tags/hybrid'

	%w{. drops tags filters}.each do \|dir\|
	Dir[File.join(File.dirname(__FILE__), 'liquid', dir, '*.rb')].each { \|lib\| require lib }

locomotive/wagon/liquid/tags/hybrid.rb b/lib/locomotive/wagon/liquid/tags/hybrid.rb +27 -0

@@	@@ -0,0 +1,27 @@
+	module Locomotive
+	module Wagon
+	module Liquid
+	module Tags
+	class Hybrid < ::Liquid::Block
+	def parse(tokens)
+	nesting = 0
+	tokens.each do \|token\|
+	next unless token =~ IsTag
+	if token =~ FullToken
+	if nesting == 0 && $1 == block_delimiter
+	@render_as_block = true
+	super
+	return
+	elsif $1 == block_name
+	nesting += 1
+	elsif $1 == block_delimiter
+	nesting -= 1
+	end
+	end
+	end
+	end
+	end
+	end
+	end
+	end
+	end
	\ No newline at end of file

locomotive/wagon/liquid/tags/link_to.rb b/lib/locomotive/wagon/liquid/tags/link_to.rb +110 -0

@@	@@ -0,0 +1,110 @@
+	module Locomotive
+	module Wagon
+	module Liquid
+	module Tags
+	class LinkTo < Hybrid
+
+	Syntax = /(#{::Liquid::Expression}+)(#{::Liquid::TagAttributes}?)/
+
+	def initialize(tag_name, markup, tokens, context)
+	if markup =~ Syntax
+	@handle = $1
+	@options = {}
+	markup.scan(::Liquid::TagAttributes) do \|key, value\|
+	@options[key] = value
+	end
+	else
+	raise SyntaxError.new("Syntax Error in 'link_to' - Valid syntax: link_to page_handle, locale es (locale is optional)")
+	end
+
+	super
+	end
+
+	def render(context)
+	if page = self.retrieve_page_from_handle(context)
+	label = self.label_from_page(page)
+	path = self.public_page_url(context, page)
+
+	if @render_as_block
+	context.scopes.last['target'] = page
+	label = super.html_safe
+	end
+
+	%{<a href="#{path}">#{label}</a>}
+	else
+	'' # no page found
+	end
+	end
+
+	protected
+
+	def retrieve_page_from_handle(context)
+	mounting_point = context.registers[:mounting_point]
+
+	context.scopes.reverse_each do \|scope\|
+	handle = scope[@handle] \|\| @handle
+
+	page = case handle
+	when Locomotive::Mounter::Models::Page then handle
+	when String then fetch_page(mounting_point, handle)
+	when Locomotive::Mounter::Models::ContentEntry then fetch_page(mounting_point, handle, true)
+	else
+	nil
+	end
+
+	return page unless page.nil?
+	end
+
+	nil
+	end
+
+	def fetch_page(mounting_point, handle, templatized = false)
+	::Locomotive::Mounter.with_locale(@options['locale']) do
+	if templatized
+	page = mounting_point.pages.values.find do \|_page\|
+	_page.templatized? &&
+	_page.content_type.slug == handle.content_type.slug &&
+	(@options['with'].nil? \|\| _page.handle == @options['with'])
+	end
+
+	page.content_entry = handle if page
+
+	page
+	else
+	mounting_point.pages.values.find { \|_page\| _page.handle == handle }
+	end
+	end
+	end
+
+	def label_from_page(page)
+	::Locomotive::Mounter.with_locale(@options['locale']) do
+	if page.templatized?
+	page.content_entry._label
+	else
+	page.title
+	end
+	end
+	end
+
+	def public_page_url(context, page)
+	fullpath = page.fullpath
+	mounting_point = context.registers[:mounting_point]
+
+	::Locomotive::Mounter.with_locale(@options['locale']) do
+	fullpath = "#{::I18n.locale}/#{fullpath}" if ::I18n.locale.to_s != mounting_point.default_locale.to_s
+	end
+
+	if page.templatized?
+	fullpath.gsub!('content_type_template', page.content_entry._slug)
+	end
+
+	File.join('/', fullpath)
+	end
+
+	end
+
+	::Liquid::Template.register_tag('link_to', LinkTo)
+	end
+	end
+	end
+	end
	\ No newline at end of file

spec/fixtures/default/app/views/pages/about_us.liquid.haml +1 -0

@@	@@ -2,6 +2,7 @@
	title: About Us
	listed: true
	position: 1
+	handle: about-us
	editable_elements:
	'banner/page_image': "/samples/photo_2.jpg"
	'banner/pitch': "<h2>About us</h2><p>Lorem ipsum...</p>"

spec/fixtures/default/app/views/pages/events.liquid.haml +8 -0

@@	@@ -26,4 +26,12 @@ position: 5

	{% endeditable_long_text %}

+	%p
+	%strong Discover: {% link_to our-music %}
+	%br
+	%strong {% link_to about-us %}Who are we ?{% endlink_to %}
+	%br
+	{% assign song = contents.songs.first %}
+	%strong {% link_to song %}
+
	{% endblock %}
	\ No newline at end of file

spec/fixtures/default/app/views/pages/music.liquid.haml +4 -1

@@	@@ -1,5 +1,6 @@
	---
	listed: true
+	handle: our-music
	position: 2
	---
	{% extends parent %}
@@	@@ -24,5 +25,7 @@ position: 2
	{% for song in contents.songs offset: 4 %}
	{% include 'song' with song %}
	{% endfor %}
-	#is_listed{listed: "{{ page.listed? }}"}
+
+	#is_listed{ listed: "{{ page.listed? }}" }
+
	{% endblock %}
	\ No newline at end of file

spec/integration/server/liquid_spec.rb +25 -4

@@	@@ -11,12 +11,12 @@ describe Locomotive::Wagon::Server do
	def app
	run_server
	end
-
+
	it "converts {{ page.templatized? }} => true on templatized page" do
	get '/songs/song-1'
	last_response.body.should =~ /templatized=.true./
	end
-
+
	it "converts {{ page.templatized? }} => false on regular page" do
	get '/index'
	last_response.body.should =~ /templatized=.false./
@@	@@ -26,14 +26,35 @@ describe Locomotive::Wagon::Server do
	get '/music'
	last_response.body.should =~ /listed=.true./
	end
-
+
	it "provides an access to page's content_type collection" do
	get '/songs/song-1'
	last_response.body.should =~ /content_type_size=.8./
	end
-
+
	it "provides count alias on collections" do
	get '/songs/song-1'
	last_response.body.should =~ /content_type_count=.8./
	end
+
+	describe '.link_to' do
+
+	it "writes a link to a page" do
+	get '/events'
+	last_response.body.should =~ /Discover: <a href="\/music">Music<\/a>/
+	end
+
+	it "writes a link to a page with a custom label" do
+	get '/events'
+	last_response.body.should =~ /<a href="\/about-us">Who are we \?<\/a>/
+	end
+
+	it "writes a link to a templatized page" do
+	get '/events'
+	last_response.body.should =~ /<a href="\/songs\/song-1">Song #1<\/a>/
+	end
+
+
+
+	end
	end
	\ No newline at end of file