add simple blog controller

app/controllers/blog_controller.rb

@@ -0,0 +1,19 @@
+class BlogController < ApplicationController
+
+  def index
+      @pages = Page.pages
+  end
+
+  def page
+    title = params[:title]
+    return redirect_to(root_path) unless title
+    @page = get_page(title)
+    return redirect_to(root_path) unless @page
+  end
+
+  def get_page(title)
+    page = Page.pages[title]
+    #puts "No #{title} in #{Page.pages.keys.join(':')}"
+    page
+  end
+end

app/models/post.rb

@@ -0,0 +1,54 @@
+class Post
+  @@posts = nil
+
+  attr_reader :year , :month , :day , :dir , :ext
+
+  def initialize(path)
+    @dir = File.dirname(path)
+    base , @ext = File.basename(path).split(".")
+    raise "must be partial, statr with _ not:#{base}" unless base[0] == "_"
+    @words = base.split("-")
+    @year = parse_int(@words.shift[1 .. -1] , 2100)
+    @day = parse_int(@words.shift , 32)
+    @month = parse_int(@words.shift , 12)
+    raise "Invalid path #{path}" unless @words
+  end
+  
+  def slug
+    @words.join("-").downcase
+  end
+  def title
+    @words.join(" ")
+  end
+  def template_name
+    "#{date}-#{@words.join("-")}"
+  end
+  def date
+    "#{year}-#{day}-#{month}"
+  end
+  def parse_int( value , max)
+    ret = value.to_i
+    raise "invalid value #{value} > #{max}" if ret > max or ret < 1
+    ret
+  end
+  def content
+    File.open("#{@dir}/_#{template_name}.#{ext}" ).read
+  end
+  def summary
+    ret = content.split("%h2").first.gsub("%p", "<br/>").html_safe
+    ret[0 .. 400]
+  end
+  def self.posts
+    return @@posts if @@posts
+    @@posts ={}
+    Dir["#{self.blog_path}/_2*.haml"].reverse.each do |file|
+      post = Post.new(file)
+      @@posts[post.slug] = post
+    end
+    @@posts
+  end
+
+  def self.blog_path
+    Rails.configuration.blog_path
+  end
+end