major refactoring of post sets and pagination, incomplete

app/helpers/pagination_helper.rb

@@ -0,0 +1,78 @@
+module PaginationHelper
+  def smart_paginator(set, &block)
+    if set.page && set.page > 1000
+      sequential_paginator(set)
+    else
+      numbered_paginator(set, &block)
+    end
+  end
+  
+  def sequential_paginator(set)
+    html = "<menu>"
+    
+    unless set.first_page?
+      html << '<li>' + link_to("&laquo; Previous", params.merge(:after_id => set.first_id)) + '</li>'
+    end
+    
+    unless set.last_page?
+      html << '<li>' + link_to("Next &raquo;", params.merge(:before_id => set.last_id)) + '</li>'
+    end
+    
+    html << "</menu>"
+    html.html_safe
+  end
+  
+  def numbered_paginator(set, &block)
+    html = "<menu>"
+    window = 3
+    if set.total_pages <= (window * 2) + 5
+      1.upto(set.total_pages) do |page|
+        html << numbered_paginator_item(page, set.current_page, &block)
+      end
+    elsif set.current_page <= window + 2
+      1.upto(set.current_page + window) do |page|
+        html << numbered_paginator_item(page, set.current_page, &block)
+      end
+      html << numbered_paginator_item("...", set.current_page, &block)
+      html << numbered_paginator_final_item(set.total_pages, set.current_page, &block)
+    
+    elsif set.current_page >= set.total_pages - (window + 1)
+      html << numbered_paginator_item(1, set.current_page, &block)
+      html << numbered_paginator_item("...", set.current_page, &block)
+      (set.current_page - window).upto(set.total_pages) do |page|
+        html << numbered_paginator_item(page, set.current_page, &block)
+      end
+    else
+      html << numbered_paginator_item(1, set.current_page, &block)
+      html << numbered_paginator_item("...", set.current_page, &block)
+      (set.current_page - window).upto(set.current_page + window) do |page|
+        html << numbered_paginator_item(page, set.current_page, &block)
+      end
+      html << numbered_paginator_item("...", set.current_page, &block)
+      html << numbered_paginator_final_item(set.total_pages, set.current_page, &block)
+    end
+    html << "</menu>"
+    html.html_safe
+  end
+  
+  def numbered_paginator_final_item(total_pages, current_page, &block)
+    if total_pages <= 1000
+      numbered_paginator_item(total_pages, current_page, &block)
+    else
+      ""
+    end
+  end
+  
+  def numbered_paginator_item(page, current_page, &block)
+    html = "<li>"
+    if page == "..."
+      html << "..."
+    elsif page == current_page
+      html << page.to_s
+    else
+      html << capture(page, &block)
+    end
+    html << "</li>"
+    html.html_safe
+  end
+end