be a little more rubyish

lib/gollum/web_sequence_diagram.rb

@@ -0,0 +1,43 @@
+require 'net/http'
+require 'uri'
+require 'open-uri'
+
+class Gollum::WebSequenceDiagram
+  WSD_URL = "http://www.websequencediagrams.com/index.php"
+
+  # Initialize a new WebSequenceDiagram object.
+  #
+  # code  - The String containing the sequence diagram markup.
+  # style - The String containing the rendering style.
+  #
+  # Returns a new Gollum::WebSequenceDiagram object
+  def initialize(code, style)
+    @code = code
+    @style = style
+    @tag = ""
+
+    render
+  end
+
+  # Render the sequence diagram on the remote server and store the url to
+  # the rendered image.
+  #
+  # Returns nil.
+  def render
+    response = Net::HTTP.post_form(URI.parse(WSD_URL), 'style' => @style, 'message' => @code)
+    if response.body =~ /img: "(.+)"/
+      url = "http://www.websequencediagrams.com/#{$1}"
+      @tag = "<img src=\"#{url}\" />"
+    else
+      puts response.body
+      @tag ="Sorry, unable to render sequence diagram at this time."
+    end
+  end
+
+  # Gets the HTML IMG tag for the sequence diagram.
+  #
+  # Returns a String containing the IMG tag.
+  def to_tag
+    @tag
+  end
+end