Checkout of Instiki Trunk 1/21/2007.

lib/chunks/category.rb

@@ -0,0 +1,33 @@
+require 'chunks/chunk'
+
+# The category chunk looks for "category: news" on a line by
+# itself and parses the terms after the ':' as categories.
+# Other classes can search for Category chunks within
+# rendered content to find out what categories this page
+# should be in.
+#
+# Category lines can be hidden using ':category: news', for example
+class Category < Chunk::Abstract
+  CATEGORY_PATTERN = /^(:)?category\s*:(.*)$/i
+  def self.pattern() CATEGORY_PATTERN  end
+
+  attr_reader :hidden, :list
+
+def initialize(match_data, content)
+    super(match_data, content)
+    @hidden = match_data[1]
+    @list = match_data[2].split(',').map { |c| c.strip }
+    @unmask_text = ''
+    if @hidden
+      @unmask_text = ''
+    else
+      category_urls = @list.map { |category| url(category) }.join(', ')
+      @unmask_text = '<div class="property"> category: ' + category_urls + '</div>'
+    end
+  end
+
+  # TODO move presentation of page metadata to controller/view
+  def url(category)
+    %{<a class="category_link" href="../list/?category=#{category}">#{category}</a>}
+  end
+end