#
# Titanium Rakefile
#
# Contains the following tasks:
#
#   build:all       # Build all source files
#   build:auto      # Autobuild all source files
#   build:compress  # Compresses and munges output JS using YUI Compressor
#   build:css       # Build CSS files from SASS source
#   build:js        # Assemble output javascript file(s)
#   compile         # Builds, then Runs the application
#   run             # Run the application via the Titanium SDK
 
# SETTINGS:  - - - - - - - -
 
# Update for your platform:
TITANIUM_PATH = "/Library/Application Support/Titanium"
SDK_PATH = "#{TITANIUM_PATH}/sdk/osx/0.6.0"
 
# Build Parameters:
SRC_ROOT = "Source/"
 
CSS_SRC = "#{SRC_ROOT}theme/"
CSS_OUT = "Resources/theme/"
 
JS_SRC = ["#{SRC_ROOT}scripts/", "lib"]
JS_OUT = "Resources/scripts/"
 
# Each of these will get a separate 'concatenation' object created, and will be compressed separately.
JS_FILES = ['taskthis.js', 'klass.js', 'tarmac.js']
 
# Options to send the Sass engine
SASS_OPTS = {
              :style => :nested, 
              :load_paths => [CSS_SRC] 
            }
 
# Set to true to skip the YUI compression phase
SKIP_COMPRESSION = true
 
# Set to true to remove the source js file after it's been compressed
RM_AFTER_COMPRESS = false
 
# Set to true to enable growl notifications... Requires 'growlnotify' to be in your path
ENABLE_GROWL = true
 
# TASKS: - - - - - - - -
 
desc "Run the application via the Titanium SDK"
task :run do
  puts "Launching Titanium SDK..."
  cmd = %Q|python "#{SDK_PATH}/tibuild.py" -d dist -s "#{TITANIUM_PATH}" -r -a "#{SDK_PATH}" .|
  puts cmd
  puts `#{cmd}`
end
 
 
desc "Builds, then Runs the application"
task :compile =>['build:all', 'run']
 
 
namespace :build do
  
  # I use SASS to build the CSS
  desc "Build CSS files from SASS source"
  task :css do
    require 'sass'
    
    Dir[File.join(CSS_SRC, '*.sass')].each do |src_file|
      short_name = src_file.gsub(CSS_SRC, '')
      if short_name[0..0] != '_'
        css_name = short_name.gsub('.sass', '.css')
        puts "  - #{css_name}..."
        File.open(src_file, 'r') do |src|
          File.open(File.join(CSS_OUT, css_name), 'w') do |out_file|
            content = Sass::Engine.new(src.read, SASS_OPTS).render
            out_file.write content
          end
        end
      end
    end
 
    `growlnotify -H localhost -t "Titanium Build" -m "CSS files have been built"`
  end
  # Used by the auto builder task...
  task :sass do
    Rake::Task[ "build:css" ].execute
  end
 
  # I use Sprocket to assemble the source JavaScript
  desc "Assemble output javascript file(s)"
  task :js do
    require 'sprockets'
    JS_FILES.each do |src_file|
      puts "  - #{src_file}..."
      js_loadpath = [JS_SRC].flatten
      src_path = File.join(js_loadpath.first, src_file)
      secretary = Sprockets::Secretary.new(
        :load_path    => js_loadpath,
        :source_files => [src_path].flatten
      )
      # Generate a Sprockets::Concatenation object from the source files
      concatenation = secretary.concatenation
      # Write the concatenation to disk
      concatenation.save_to( File.join(JS_OUT, src_file) )
    end
    `growlnotify -H localhost -t "Titanium Build" -m "JavaScript files have been built"`
    # Now compress the generated js files...
    Rake::Task[ "build:compress" ].execute
  end
  
  # I use yui-compressor to compress and munge the app js
  desc "Compresses and munges output JS using YUI Compressor"
  task :compress do
    unless SKIP_COMPRESSION
      require "yui/compressor"
      JS_FILES.each do |src_file|
        puts " ][ #{src_file}..."
        compressor = YUI::JavaScriptCompressor.new(:munge => true)
        # Open src file...
        File.open(File.join(JS_OUT, src_file), "r") do |source|
          output_file = src_file.gsub(/\.js$/, '.min.js')
          # Open output file...
          File.open(File.join(JS_OUT, output_file), "w") do |f|
            compressor.compress(source) do |compressed|
              # Write out the compressed content...
              f.write compressed.read
            end
          end
        end
        if RM_AFTER_COMPRESS
          File.unlink( File.join(JS_OUT, src_file) )
        end
      end
      `growlnotify -H localhost -t "Titanium Build" -m "JavaScript files have been compressed"`
    end
  end
  
  desc "Build all source files"
  task :all do
    Rake::Task[ "build:css" ].execute
    Rake::Task[ "build:js" ].execute
  end
  
  # Uses directory_watcher for auto building...
  desc "Autobuild all source files"
  task :auto do
    require 'directory_watcher'
    builder = AutoBuilder.new
    builder.run
  end
end
 
 
class AutoBuilder
  def initialize
    @watcher = DirectoryWatcher.new( '.', :interval => 2 )
    @watcher.add_observer self
    
    glob = []
    glob << File.join(CSS_SRC, '**', '*')
    [JS_SRC].flatten.each do |js_src|
      glob << File.join(js_src, '**', '*')
    end
    
    @watcher.glob = glob
  end
  
  def update( *events )
    update = []
    events.each do |evt|
      update << File.extname( evt.path )[1..-1]
    end
    
    if update.length > 0
      puts "\n[#{Time.now.strftime('%y/%m/%d %H:%M:%S')}] Source file changed..."
      update.flatten.uniq.each do |type|
        Rake::Task[ "build:#{type}" ].execute
      end
      puts "  : Waiting..."
    end
    
  rescue => err
    puts err
  end
  
  def run
    Signal.trap('INT') {
      @watcher.stop
    }
    @watcher.start
    @watcher.join
  end
end