blog nav, prev and next, some tweaking

app/helpers/application_helper.rb

@@ -1,10 +1,9 @@
 module ApplicationHelper
-  def post_link(index)
-    post = Post.posts.values[index]
+  def post_link(post)
     return "" unless post
-    link = post.date.to_s + "  "
-    link +=  link_to( post.title , blog_post_url(post.slug))
-    link.html_safe
+    link_to(blog_post_url(post.slug)) do
+      "#{post.title.capitalize} <span>(#{post.date})</span>".html_safe
+    end.html_safe
   end
 
   def ext_link(name = nil, options = nil, html_options = nil, &block)
@@ -22,4 +21,19 @@ module ApplicationHelper
   def title(title)
     @title = title
   end
+
+  def prev_post(post)
+    index = Post.posts.keys.index(post.slug)
+    nav_post(index + 1 , "prev")
+  end
+  def next_post(post)
+    index = Post.posts.keys.index(post.slug)
+    nav_post(index - 1 , "next")
+  end
+  def nav_post(index, dir)
+    return "" unless index >= 0
+    post = Post.posts.values[index]
+    return "" unless post
+    link_to("#{dir} <span>(#{post.date})</span>".html_safe , blog_post_url(post.slug) , alt: post.title.capitalize)
+  end
 end