Move gollum back end to gollum-lib #647

lib/gollum/views/page.rb

@@ -0,0 +1,157 @@
+module Precious
+  module Views
+    class Page < Layout
+      include HasPage
+
+      attr_reader :content, :page, :header, :footer
+      DATE_FORMAT = "%Y-%m-%d %H:%M:%S"
+      DEFAULT_AUTHOR = 'you'
+      @@to_xml =  { :save_with => Nokogiri::XML::Node::SaveOptions::DEFAULT_XHTML ^ 1, :indent => 0, :encoding => 'UTF-8' }
+
+      def title
+        h1 = @h1_title ? page_header_from_content(@content) : false
+        h1 || @page.url_path_title
+      end
+
+      def page_header
+        page_header_from_content(@content) || title
+      end
+
+      def content
+        content_without_page_header(@content)
+      end
+
+      def author
+        page_versions = @page.versions
+        first = page_versions ? page_versions.first : false
+        return DEFAULT_AUTHOR unless first
+        first.author.name.respond_to?(:force_encoding) ? first.author.name.force_encoding('UTF-8') : first.author.name
+      end
+
+      def date
+        page_versions = @page.versions
+        first = page_versions ? page_versions.first : false
+        return Time.now.strftime(DATE_FORMAT) unless first
+        first.authored_date.strftime(DATE_FORMAT)
+      end
+
+      def editable
+        @editable
+      end
+
+      def has_header
+        @header = (@page.header || false) if @header.nil?
+        !!@header
+      end
+
+      def header_content
+        has_header && @header.formatted_data
+      end
+
+      def header_format
+        has_header && @header.format.to_s
+      end
+
+      def has_footer
+        @footer = (@page.footer || false) if @footer.nil?
+        !!@footer
+      end
+
+      def footer_content
+        has_footer && @footer.formatted_data
+      end
+
+      def footer_format
+        has_footer && @footer.format.to_s
+      end
+      
+      def bar_side
+        @bar_side.to_s
+      end
+
+      def has_sidebar
+        @sidebar = (@page.sidebar || false) if @sidebar.nil?
+        !!@sidebar
+      end
+
+      def sidebar_content
+        has_sidebar && @sidebar.formatted_data
+      end
+
+      def sidebar_format
+        has_sidebar && @sidebar.format.to_s
+      end
+
+      def has_toc
+        !@toc_content.nil?
+      end
+
+      def toc_content
+        @toc_content
+      end
+
+      def mathjax
+        @mathjax
+      end
+
+      def use_identicon
+        @page.wiki.user_icons == 'identicon'
+      end
+
+      # Access to embedded metadata.
+      #
+      # Examples
+      #
+      #   {{#metadata}}{{name}}{{/metadata}}
+      #
+      # Returns Hash.
+      def metadata
+        @page.metadata
+      end
+
+      private
+
+      # Wraps page formatted data to Nokogiri::HTML document.
+      #
+      def build_document(content)
+        Nokogiri::HTML::fragment(%{<div id="gollum-root">} + content.to_s + %{</div>}, 'UTF-8')
+      end
+
+      # Finds header node inside Nokogiri::HTML document.
+      #
+      def find_header_node(doc)
+        case @page.format
+          when :asciidoc
+            doc.css("div#gollum-root > div#header > h1:first-child")
+          when :org
+            doc.css("div#gollum-root > p.title:first-child")
+          when :pod
+            doc.css("div#gollum-root > a.dummyTopAnchor:first-child + h1")
+          when :rest
+            doc.css("div#gollum-root > div > div > h1:first-child")
+          else
+            doc.css("div#gollum-root > h1:first-child")
+        end
+      end
+
+      # Extracts title from page if present.
+      #
+      def page_header_from_content(content)
+        doc = build_document(content)
+        title = find_header_node(doc).inner_text.strip
+        title = nil if title.empty?
+        title
+      end
+
+      # Returns page content without title if it was extracted.
+      #
+      def content_without_page_header(content)
+        doc = build_document(content)
+        title = find_header_node(doc)
+        title.remove unless title.empty?
+        # .inner_html will cause href escaping on UTF-8
+        doc.css("div#gollum-root").children.to_xml( @@to_xml )
+      end
+    end
+  end
+end