Re-implemented using Merb.

README

@@ -9,7 +9,7 @@ Usage
 
 Run the server:
 
-  $ ruby backchat.rb
+  $ merb -I backchat.rb
 
 
 Then embed the javascript in a page or template:

backchat.rb

@@ -1,9 +1,13 @@
-require 'rubygems'
-require 'sinatra'
-require 'markaby'
 require 'activerecord'
+require 'markaby'
 require 'bluecloth'
 
+Merb::Router.prepare do |r|
+  r.match('/:reference.js').to(:controller => 'backchat', :action => 'embed').name(:embed)
+  r.match('/comments/:reference').to(:controller => 'backchat', :action => 'show', :method => 'get').name(:show)
+  r.match('/comments/create/:reference').to(:controller => 'backchat', :action => 'create', :method => 'post').name(:create)
+end
+
 ActiveRecord::Base.establish_connection({
   :adapter => 'sqlite3',
   :database => File.basename(__FILE__, '.rb') + '.db'
@@ -23,83 +27,72 @@ def self.create_table
 
 Comment.create_table unless ActiveRecord::Base.connection.tables.include?(Comment.table_name)
 
-Styles = <<-EOS
-.backchat p { margin: 5px }
-.backchat ul { list-style: none; padding-left: 0 }
-.backchat li { background-color: #eee; padding: 0.2em 0.5em 0.5em 0.5em;  }
-.backchat li .content { background-color: #fff; padding: 0.5em }
-EOS
-
-get "/embed.js" do
-  header 'Content-Type' => 'text/javascript'
-  %{var backchat_reference = encodeURIComponent(encodeURIComponent(window.document.location));
-    document.write('<script src="#{server_address}/' + backchat_reference + '"><script>')}
-end
-
-# Write the comments directly into the requesting page
-get "/:reference.:format" do
-  #puts application.env
-  header 'Content-Type' => 'text/javascript'
-  "document.write('#{comments(params)}');"
-end
-
-def server_address
-  # TODO: how to figure this out programmatically?
-  "http://localhost:4567"
-end
-
-get "/test/*" do
-  params.inspect
-end
+class Backchat < Merb::Controller
+  def embed
+    render "document.write('#{styles}'); document.write('#{render_comments}');", :format => :js
+  end
 
-# Render the comments HTML
-def comments(params)
-  comments = Comment.find_all_by_reference(params[:reference])
-  Markaby::Builder.new({:params => params, :comments => comments}) do
-    div.backchat do
-      if @comments.any?
-        h2 "#{@comments.length} comment(s)"
-        ul do
-          @comments.each do |comment|
-            li do
-              p.author "#{comment.author_name} said (#{comment.created_at.strftime("%Y-%m-%d %H:%M")})"
-              div.content { BlueCloth.new(comment.content).to_html }
+  def show
+    render_comments
+  end
+
+  def create
+    Comment.create!(params[:comment].merge(:reference => params[:reference]))
+    store_credentials
+    redirect request.referer
+  end
+
+  private
+
+  def store_credentials
+    session[:author_name] = params[:comment][:author_name] rescue nil
+    session[:author_email] = params[:comment][:author_email] rescue nil
+  end
+
+  def styles
+    "<style>
+    .backchat p { margin: 5px }
+    .backchat ul { list-style: none; padding-left: 0 }
+    .backchat li { background-color: #eee; padding: 0.2em 0.5em 0.5em 0.5em;  }
+    .backchat li .content { background-color: #fff; padding: 0.5em }
+    .backchat form label { display: block; vertical-align: top }
+    .backchat form input, .backchat form textarea { width: 20em }
+    .backchat form textarea { height: 10em }
+    </style>".gsub("\n", " ")
+  end
+
+  def render_comments
+    comments = Comment.find_all_by_reference(params[:reference])
+    Markaby::Builder.new({:params => params, :comments => comments, :controller => self}) do
+      div.backchat do
+        if @comments.any?
+          h2 "#{@comments.length} comment(s)"
+          ul do
+            @comments.each do |comment|
+              li do
+                p.author "#{comment.author_name} said (#{comment.created_at.strftime("%Y-%m-%d %H:%M")})"
+                div.content { BlueCloth.new(comment.content).to_html }
+              end
             end
           end
+        else
+          h2 "No comments"
+        end
+        form(:action => "http://#{@controller.request.host}" + 
+                        @controller.url(:create, :reference => params[:reference]), 
+             :method => "post") do
+          label { "Name: " + input(:type => "text", :name => "comment[author_name]", :value => @controller.session[:author_name]) }
+          label { "Email: " + input(:type => "text", :name => "comment[author_email]", :value => @controller.session[:author_email]) }
+          label { "Comment: " + textarea(:name => "comment[content]") }
+          button(:type => "submit") { "Post!" }
         end
-      else
-        h2 "No comments"
-      end
-      form(:action => "#{server_address}/#{@params[:reference]}", :method => "post") do
-        label { "Name: " + input(:type => "text", :name => "author_name") }
-        label { "Email: " + input(:type => "text", :name => "author_email") }
-        label { "Comment: " + textarea(:name => "content") }
-        button(:type => "submit") { "Post!" }
-      end
-    end
-  end.to_s
-end
-
-# Show the comments, but as HTML
-get "/:reference" do
-  Markaby::Builder.new({:params => params}) do
-    html do
-      head do
-        style Styles
-      end
-      body do
-        comments(params)
       end
-    end
-  end.to_s
+    end.to_s
+  end
 end
 
-# Post a new comment for this reference
-post "/:reference.:format" do
-  comment_attributes = params.dup.reject { |k,v| k == :format }
-  p comment_attributes
-  Comment.create!(comment_attributes)
-
-  # TODO: we need to redirect BACK here.
-  redirect params[:reference]
+Merb.config do
+  session_store "cookie"
+  session_secret_key "rabbit rabbit rabbit rabiit"
+  exception_details = true
 end

test.html

@@ -1,5 +1,8 @@
 <html>
 <body>
-<script src="http://localhost:4567/embed.js"></script>
+<h1>Some page</h1>
+<a href="#">this page</a>
+<hr>
+<script src="http://localhost:4000/blah.js"></script>
 </body>
 </html>