#!/usr/bin/ruby -rcgi
require "rubygems"
require "haml"
require "sass"
class GitWiki
  attr_accessor :wiki_dir, :main_page, :base_url
  def initialize(wiki_dir="/home/sbecker/drunkenruby.com/public/wiki/",base_url="drunken.cgi?page=%s",main_page = "DrunkenRuby")
    @wiki_dir = wiki_dir
    @main_page = main_page
    @base_url = base_url
  end

  def not_found_message(*args)
    "Page not found!"
  end

  def save_wiki_page(page,data,message = "No Message")
    `echo "#{data.gsub('"','\"')}" > wiki/#{page} `
    e = $?.exitstatus

    if e == 0
      `cd wiki &&git add . &&  git commit -m "#{message}" `
      true
    else
      false
    end
  end

  def get_wiki_revision_numbers(page,limit = 5 )
    revisions  = Array.new
    sys_rev = `cd wiki && git log --pretty=oneline #{page}`
    revisions = sys_rev.split("\n").map{|r| r.split[0]} if $?.exitstatus == 0
    revisions[1..5]
  end

  def get_page(name, revision=nil)
    t = nil
    if revision.to_s == ""
      t = `cat wiki/#{name}`
    else
      t = `cd wiki &&git show #{revision}:#{name}`
      t = "<br/>No rev:#{revision} found <br/><br/>"+ `cat wiki/#{name}` if $?.exitstatus != 0
    end
    t
  end
end



begin
  wiki = GitWiki.new
  c = CGI.new('html4')
  n,d = c['page']!='' ? c['page']:wiki.main_page,c['data']
  e = nil
  if d != ''
      if wiki.save_wiki_page(n,d,c["message"])
        print c.header({'Status' => '302 Moved', 'location' =>  wiki.base_url%"#{n}&save_status=#{e}"})
      end
    e = "There was an error saving." #the save failed
  else
    t = wiki.get_page(n,c["rev"]) || wiki.not_found_message
    revisions = wiki.get_wiki_revision_numbers(n)
    pages = `ls wiki`.split
    c.instance_eval{ out{
        "#{Haml::Engine.new(File.read(File.join(File.dirname(__FILE__),"..","templates","main.haml"))).render(Object.new,{:pages=>pages,:current_page=>n,:wiki_page=>t,:wiki=>wiki})}"
      }
    }
  end
rescue Exception =>e
  File.open("cow","w+"){|f| f.puts( e.message);f.puts(e.backtrace.join("\n"))}
end