add Page#format

lib/gollum/page.rb

@@ -30,6 +30,34 @@ module Gollum
       self.blob.data rescue nil
     end
 
+    # The format of the page.
+    #
+    # Returns the Symbol format of the page. One of:
+    #   [ :markdown | :textile | :rdoc | :org | :rest | :asciidoc | :pod |
+    #     :roff ]
+    def format
+      case blob.name
+        when /\.(md|mkdn?|mdown|markdown)$/i
+          :markdown
+        when /\.(textile)$/i
+          :textile
+        when /\.(rdoc)$/i
+          :rdoc
+        when /\.(org)$/i
+          :org
+        when /\.(re?st(\.txt)?)$/i
+          :rest
+        when /\.(asciidoc)$/i
+          :asciidoc
+        when /\.(pod)$/i
+          :pod
+        when /\.(\d)$/i
+          :roff
+        else
+          nil
+      end
+    end
+
     # Find a page in the given Gollum repo.
     #
     # name - The human or canonical String page name to find.

test/test_page.rb

@@ -14,6 +14,7 @@ context "Page" do
     page = @wiki.formatted_page('Bilbo Baggins')
     assert_equal Gollum::Page, page.class
     assert page.data =~ /^# Bilbo Baggins\n\nBilbo Baggins/
+    assert_equal :markdown, page.format
   end
 
   test "no page match" do