Class: Rack::Reshow

Inherits:
Object
  • Object
show all
Defined in:
lib/rack/reshow.rb

Defined Under Namespace

Classes: Page, RackStaticBugAvoider

Constant Summary collapse

@@store_file = 
'reshow.ps'

Instance Method Summary collapse

Constructor Details

#initialize(app, opts = {}) ⇒ Reshow

Returns a new instance of Reshow.



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# File 'lib/rack/reshow.rb', line 106

def initialize( app, opts = {} )
  root = Object::File.expand_path(Object::File.dirname(__FILE__))
  @app = RackStaticBugAvoider.new(app, Rack::Static.new(app, :urls => ["/__reshow__"], :root => root))
  @store = PStore.new(@@store_file)
end

Instance Method Details

#[](path) ⇒ Object 



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# File 'lib/rack/reshow.rb', line 151

def []( path )
  @store.transaction(true) {|store| store[path] || Array.new}
end

#call(env) ⇒ Object 



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# File 'lib/rack/reshow.rb', line 112

def call( env )
  request = Request.new(env)
  path = request.path
  return serve_stylesheet(request) if path =~ /__reshow__\/assets/
  status, headers, body = @app.call(env)
  if status == 200 and body.respond_to? :join
    body = body.join
    if body[/<head>.*?<\/head>/] and body[/<body>.*?<\/body>/]
      page = Page.new body, path, @app
      # Store response
      @store.transaction do |store|
        store[path] ||= []
        store[path] << page unless body.nil? or store[path].last.eql?(page)
      end
      # Insert Reshow assets
      page.append_to_tag '</head>', [style, javascript].join("\n")
      # Prepare for Reshow bar
      @store.transaction(true) do |store|
        page.body = %q{<div id="__reshow_bodies__"></div>}
        store[path].reverse.each do |p|
          page.prepend_to_tag '<div id="__reshow_bodies__">', Page.tag(:div, p.body, :class => '__reshow_body__')
        end
        versions = store[path].count
        # Insert Reshow Bar
        page.append_to_tag '</body>', toolbar(versions)
        # Insert versioned stylesheets
        versions.times do |v|
          escaped_path = Rack::Utils.escape(path)
          href = "/__reshow__/assets?path=#{escaped_path}&version=#{v}"
          page.append_to_tag '</head>', "<link charset='utf-8' href='#{href}' rel='stylesheet' type='text/css'>"
        end
      end
      headers['Content-Length'] = page.length.to_s
      body = [page.to_s]
    end
  end
  [status, headers, body]
end

#purge! ⇒ Object 



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# File 'lib/rack/reshow.rb', line 155

def purge!
  Object::File.delete(@@store_file) if Object::File.exists?(@@store_file)
end