major refactoring of post sets and pagination, incomplete

app/presenters/paginators/numbered.rb

@@ -0,0 +1,58 @@
+module Paginators
+  class Numbered
+    attr_reader :template, :source
+    delegate :url, :total_pages, :current_page, :to => :source
+    
+    def initialize(template, source)
+      @template = template
+      @source = source
+    end
+    
+    def pagination_html
+      html = "<menu>"
+      window = 3
+      if total_pages <= (window * 2) + 5
+        1.upto(total_pages) do |page|
+          html << pagination_item(page, current_page)
+        end
+      elsif current_page <= window + 2
+        1.upto(current_page + window) do |page|
+          html << pagination_item(page, current_page)
+        end
+        html << pagination_item("...", current_page)
+        html << pagination_item(total_pages, current_page)
+      
+      elsif current_page >= total_pages - (window + 1)
+        html << pagination_item(1, current_page)
+        html << pagination_item("...", current_page)
+        (current_page - window).upto(total_pages) do |page|
+          html << pagination_item(page, current_page)
+        end
+      else
+        html << pagination_item(1, current_page)
+        html << pagination_item("...", current_page)
+        (current_page - window).upto(current_page + window) do |page|
+          html << pagination_item(page, current_page)
+        end
+        html << pagination_item("...", current_page)
+        html << pagination_item(total_pages, current_page)
+      end
+      html << "</menu>"
+      html.html_safe
+    end
+
+  protected
+    def pagination_item(page, current_page)
+      html = "<li>"
+      if page == "..."
+        html << "..."
+      elsif page == current_page
+        html << page.to_s
+      else
+        html << template.link_to(page, url(template, :page => page))
+      end
+      html << "</li>"
+      html.html_safe
+    end
+  end
+end