r:if_field tag

lib/page_fields_extension/page_field_tags.rb

@@ -0,0 +1,36 @@
+module PageFieldsExtension::PageFieldTags
+  include Radiant::Taggable
+
+  desc %(
+    Renders the content of the field given in the @name@ attribute.
+
+    *Usage:*
+
+    <pre><code><r:field name="Keywords" /></code></pre>
+  )
+  tag 'field' do |tag|
+    raise TagError.new("`field' tag must contain a `name' attribute.") unless tag.attr.has_key?('name')
+    tag.locals.page.fields[tag.attr['name']].try :content
+  end
+
+  desc %(
+    Renders the contained elements if the field given in the @name@ attribute
+    exists. The tag also takes an optional @equals@ or @matches@ attribute;
+    these will expand the tag if the field's content equals or matches the
+    given string or regex.
+
+    *Usage:*
+
+    <pre><code><r:if_field name="author" [equals|matches="John"]>...</r:if_field></code></pre>
+  )
+  tag 'if_field' do |tag|
+    raise TagError.new("`field' tag must contain a `name' attribute.") unless tag.attr.has_key?('name')
+    field = tag.locals.page.fields[tag.attr['name']]
+    tag.expand if case
+      when (tag.attr['equals'] and tag.attr['ignore_case'] == 'false') : field.content == tag.attr['equals']
+      when tag.attr['equals'] : field.content.downcase == tag.attr['equals'].downcase
+      when tag.attr['matches'] : field.content =~ build_regexp_for(tag, 'matches')
+      else field
+    end
+  end
+end

page_fields_extension.rb

@@ -6,7 +6,7 @@ class PageFieldsExtension < Radiant::Extension
   url "http://github.com/joshfrench/radiant-page_fields-extension"
 
   def activate
-    Page.send :include, PageExtensions, DeprecatedMetaTags
+    Page.send :include, PageExtensions, PageFieldTags, DeprecatedMetaTags
     Admin::PagesController.send :include, PagesControllerExtensions
     admin.pages.edit.add :popups, 'add_field_popup'
     admin.page.edit.add :extended_metadata, "page_fields"

spec/lib/page_field_tags_spec.rb

@@ -0,0 +1,48 @@
+require File.dirname(__FILE__) + '/../spec_helper'
+
+describe PageFieldsExtension::PageFieldTags do
+  before do
+    @page = Page.new(:slug => "/", :parent_id => nil, :title => 'Home')
+    @field = PageField.new(:name => 'Field', :content => "Sweet harmonious biscuits")
+    @page.fields = [@field]
+  end
+
+  describe '<r:field>' do
+    it "should return field content" do
+      @page.should render('<r:field name="field" />').as('Sweet harmonious biscuits')
+    end
+
+    it "should do nothing for missing field" do
+      @page.should render('<r:field name="bogus" />').as('')
+    end
+  end
+
+  describe "<r:if_field>" do
+    describe "with `name` attr" do
+      it "should should expand if field exists" do
+        @page.should render('<r:if_field name="field">Ok</r:if_field>').as('Ok')
+      end
+    end
+
+    describe "with `equals` attr" do
+      it "should expand if content equals attr" do
+        @page.should render('<r:if_field name="field" equals="sweet harmonious biscuits">Ok</r:if_field>').as('Ok')
+      end
+
+      it "should be case sensitive if ignore_case is false" do
+        @page.should render('<r:if_field name="field" equals="sweet harmonious biscuits" ignore_case="false">Ok</r:if_field>').as('')
+      end
+    end
+
+    describe "with `matches` attr" do
+      it "should expand if content matches attr" do
+        @page.should render('<r:if_field name="field" matches="^sweet\s">Ok</r:if_field>').as('Ok')
+      end
+
+      it "should be case sensitive if ignore_case is false" do
+        @page.should render('<r:if_field name="field" matches="^sweet\s" ignore_case="false">Ok</r:if_field>').as('')
+      end
+    end
+  end
+
+end