require "rake"

module DtcRake
  module Tasks
    def load_tasks(params = {})
      # a flag - load the tasks just once, multiple loading
      # leads to multiple invocation of the same task
      return if defined? @tasks_loaded

      params[:exclude] ||= []
      params[:include] ||= ["*.rake"]
      filelist = {}

      [:exclude, :include].each do |key|
        filelist[key] = params[key].collect { |file| Dir[File.expand_path("#{File.dirname(__FILE__)}/../tasks/#{file}")] }
        filelist[key].flatten!
      end

      # load an include file only if it not in the exclude list
      filelist[:include].each do |ext|
        load ext unless filelist[:exclude].include?(ext)
      end

      @tasks_loaded = true
    end
    module_function :load_tasks
  end
end