Stateful version of the Integrity notifier for Campfire

campfire.rb

# A stateful version of the Integrity notifier for Campfire. It only pings the room
# when the build is broken or when it's just been fixed. This is nice when you already
# have a post-receive hook posting every commit to the same room.

require 'rubygems'
require 'integrity'
require 'tinder'
require 'action_view'

module Integrity
  class Notifier
    class Campfire < Notifier::Base
      include ActionView::Helpers::TextHelper

      attr_reader :config

      def self.to_haml
        File.read File.dirname(__FILE__) / "config.haml"
      end

      def deliver!
        if build.failed? && already_broken?
          room.speak "The #{build.project.name} build is still broken: #{build_url}"
        elsif build.failed? && !already_broken?
          record!("red")
          room.speak "#{build.commit_author.name} broke the #{build.project.name} build: #{build_url}"
        elsif build.successful? && already_broken?
          record!("green")
          room.speak "#{build.commit_author.name} fixed the #{build.project.name} build: #{build_url}"
        else
          # the build was green, and it's still green. that's how we dooz it, no need to flaunt it
        end
      end

    private
      def room
        @room ||= begin
          campfire = Tinder::Campfire.new(config['account'], :ssl => true)
          campfire.login(config['user'], config['pass'])
          campfire.find_room_by_name(config['room'])
        end
      end

      def log_filename
        repo = build.project.name.gsub(/\s+/, '')
        "/home/git/shared_hooks/logs/#{repo}.build_status.log"
      end

      def already_broken?
        status = "green"
        if File.exist?(log_filename)
          status = File.open(log_filename) { |f| f.read.strip }
        end
        status == "red"
      end

      def record!(status)
        File.open(log_filename, "w+") { |f| f.write(status) }
      end

    end
  end
end