stephan-nordnes-eriksen/feather_watch

module FeatherWatch::Core
    class DarwinWatcher
        def initialize(directories, callback, verbose= false, silence_exceptions= false)
            puts "Initializing mac watcher" if @verbose
            
            @verbose = verbose
            @silence_exceptions = silence_exceptions
            
            setup_watcher(directories, callback, verbose, silence_exceptions)
        end
        
        def start
            puts "Starting mac watcher" if @verbose
            Thread.new do
                @fs_event.run
            end
        end

        def stop
            puts "Stopping mac watcher" if @verbose
            @fs_event.stop
        end

        private

        def setup_watcher(directories, callback, verbose, silence_exceptions)
            @fs_event = FSEvent.new
            options = { :no_defer => true,
                        :file_events => true }

            @fs_event.watch directories, options do |changed_files|
                changed_files.each do |f|
                    begin
                        if File.file?(f)
                            puts "Change on file: #{f}" if @verbose
                            callback.call({status: :modified, file: f, event: f})
                        else
                            puts "Removed file: #{f}" if @verbose
                            callback.call({status: :removed, file: f, event: f})
                        end
                    rescue Exception => e
                        unless @silence_exceptions
                            FeatherWatch::Core::Common.print_error(e)
                        end
                    end
                end
            end
        end
    end
end