Merge pull request #67 from matt-hh/master

Tags for blog feature

lib/middleman/features/blog.rb

@@ -13,6 +13,10 @@ module Middleman
               app.set :blog_permalink, "/:year/:month/:day/:title.html"
             end
 
+            if !app.settings.respond_to? :blog_taglink
+              app.set :blog_taglink, "/tags/:tag.html"
+            end
+
             if !app.settings.respond_to? :blog_layout
               app.set :blog_layout, "layout"
             end
@@ -55,7 +59,8 @@ module Middleman
 
               sum = if data["raw"] =~ app.settings.blog_summary_separator
                 data["raw"].split(app.settings.blog_summary_separator).first
-              else                data["raw"].match(/(.{1,#{app.settings.blog_summary_length}}.*?)(\n|\Z)/m).to_s
+              else
+                data["raw"].match(/(.{1,#{app.settings.blog_summary_length}}.*?)(\n|\Z)/m).to_s
               end
 
               engine = RDiscount.new(sum)
@@ -63,7 +68,22 @@ module Middleman
               data
             end.sort { |a, b| b["date"] <=> a["date"] }
 
-            app.data_content("blog", { :articles => articles })
+            tags = {}
+            articles.each do |article|
+              article["tags"] ||= ""
+              if !article["tags"].empty?
+                tags_array = article["tags"].split(',').map{|t| t.strip}
+                tags_array.each do |tag_title|
+                  tag_key = tag_title.parameterize
+                  tag_path = blog_taglink.gsub(/(:\w+)/, tag_key)
+                  (tags[tag_path] ||= {})["title"] = tag_title
+                  tags[tag_path]["ident"] = tag_key
+                  (tags[tag_path]["pages"] ||= {})[article["title"]] = article["url"]
+                end
+              end
+            end
+
+            app.data_content("blog", { :articles => articles, :tags => tags })
 
             app.get(app.settings.blog_permalink) do
               options = {}
@@ -87,9 +107,9 @@ module Middleman
               status 200
               output
             end
-          end
 
           end
+        end
         alias :included :registered
       end
 
@@ -112,6 +132,36 @@ module Middleman
         def current_article_metadata
           data.page
         end
+
+        def current_article_tags
+          article_tags_hash = {}
+          if is_blog_article? && current_article_metadata.tags
+            article_tags = current_article_metadata.tags.split(',').map{|t| t.strip}
+            article_tags.each do |tag_title|
+              article_tags_hash[tag_title] = self.class.blog_taglink.gsub(/(:\w+)/, tag_title.parameterize)
+            end
+          end
+          article_tags_hash
+        end
+
+        def blog_tags
+          data.blog.tags
+        end
+
+        def current_tag_data
+          data.blog.tags[request.path]
+        end
+
+        def current_tag_articles
+          data.blog.articles.map do |article|
+            article if current_tag_data.pages.has_value?(article.url)
+          end.compact
+        end
+
+        def current_tag_title
+          current_tag_data[:title]
+        end
+
       end
     end
   end