Class: Gloo::App::Engine

Inherits:
Object
  • Object
show all
Defined in:
lib/gloo/app/engine.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(params = []) ⇒ Engine

Set up the engine with basic elements.



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# File 'lib/gloo/app/engine.rb', line 26

def initialize( params = [] )
  $engine = self
  @args = Args.new( params )
  $settings = Settings.new( ENV[ 'GLOO_ENV' ] )
  $log = Log.new( @args.quiet? )
  $prompt = TTY::Prompt.new
  $log.debug 'engine intialized...'
end

Instance Attribute Details

#args ⇒ Object (readonly)

Returns the value of attribute args.



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# File 'lib/gloo/app/engine.rb', line 18

def args
  @args
end

#converter ⇒ Object

Returns the value of attribute converter.



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# File 'lib/gloo/app/engine.rb', line 21

def converter
  @converter
end

#dictionary ⇒ Object (readonly)

Returns the value of attribute dictionary.



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# File 'lib/gloo/app/engine.rb', line 19

def dictionary
  @dictionary
end

#event_manager ⇒ Object

Returns the value of attribute event_manager.



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# File 'lib/gloo/app/engine.rb', line 20

def event_manager
  @event_manager
end

#exec_env ⇒ Object

Returns the value of attribute exec_env.



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# File 'lib/gloo/app/engine.rb', line 21

def exec_env
  @exec_env
end

#factory ⇒ Object (readonly)

Returns the value of attribute factory.



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# File 'lib/gloo/app/engine.rb', line 19

def factory
  @factory
end

#heap ⇒ Object (readonly)

Returns the value of attribute heap.



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# File 'lib/gloo/app/engine.rb', line 19

def heap
  @heap
end

#help ⇒ Object

Returns the value of attribute help.



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# File 'lib/gloo/app/engine.rb', line 21

def help
  @help
end

#last_cmd ⇒ Object

Returns the value of attribute last_cmd.



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# File 'lib/gloo/app/engine.rb', line 20

def last_cmd
  @last_cmd
end

#mode ⇒ Object (readonly)

Returns the value of attribute mode.



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# File 'lib/gloo/app/engine.rb', line 18

def mode
  @mode
end

#parser ⇒ Object (readonly)

Returns the value of attribute parser.



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# File 'lib/gloo/app/engine.rb', line 19

def parser
  @parser
end

#persist_man ⇒ Object

Returns the value of attribute persist_man.



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# File 'lib/gloo/app/engine.rb', line 20

def persist_man
  @persist_man
end

#running ⇒ Object (readonly)

Returns the value of attribute running.



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# File 'lib/gloo/app/engine.rb', line 18

def running
  @running
end

Instance Method Details

#clear_screen ⇒ Object

Clear the screen.



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# File 'lib/gloo/app/engine.rb', line 202

def clear_screen
  @cursor ||= TTY::Cursor
  print @cursor.clear_screen
  print @cursor.move_to( 0, 0 )
end

#default_prompt ⇒ Object

Get the default prompt text.



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# File 'lib/gloo/app/engine.rb', line 126

def default_prompt
  dt = DateTime.now
  d = dt.strftime( '%Y.%m.%d' )
  t = dt.strftime( '%I:%M:%S' )
  return "#{'gloo'.blue} #{d.yellow} #{t.white} >"
end

#err(msg) ⇒ Object

Report an error. Write it to the log and set the heap error value.



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# File 'lib/gloo/app/engine.rb', line 223

def err( msg )
  $log.error msg
  self.heap.error.set_to msg
end

#error? ⇒ Boolean

Did the last command result in an error?

Returns:

  • (Boolean) 


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# File 'lib/gloo/app/engine.rb', line 215

def error?
  return !@heap.error.value.nil?
end

#last_cmd_blank? ⇒ Boolean

Is the last command entered blank?

Returns:

  • (Boolean) 


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# File 'lib/gloo/app/engine.rb', line 136

def last_cmd_blank?
  return true if @last_cmd.nil?
  return true if @last_cmd.strip.empty?

  return false
end

#loop ⇒ Object

Prompt, Get input, process.



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# File 'lib/gloo/app/engine.rb', line 146

def loop
  while @running
    prompt_cmd
    process_cmd
  end
end

#open_start_file ⇒ Object

Get the setting for the start_with file and open it.



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# File 'lib/gloo/app/engine.rb', line 111

def open_start_file
  name = $settings.start_with
  @persist_man.load( name ) if name
end

#process_cmd ⇒ Object

Process the command.



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# File 'lib/gloo/app/engine.rb', line 156

def process_cmd
  if last_cmd_blank?
    clear_screen
    return
  end

  @parser.run @last_cmd
end

#prompt_cmd ⇒ Object

Prompt for the next command.



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# File 'lib/gloo/app/engine.rb', line 119

def prompt_cmd
  @last_cmd = $prompt.ask( default_prompt )
end

#quit ⇒ Object

Do any clean up and quit.



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# File 'lib/gloo/app/engine.rb', line 175

def quit
  $log.debug 'quitting...'
end

#run ⇒ Object

Run in interactive mode.



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# File 'lib/gloo/app/engine.rb', line 94

def run
  # Open default file(s)
  self.open_start_file

  # TODO: open any files specifed in args

  unless @mode == Mode::SCRIPT || @args.quiet?
    @cursor = TTY::Cursor
    self.loop
  end

  quit
end

#run_files ⇒ Object

Run files specified on the CLI. Then quit.



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# File 'lib/gloo/app/engine.rb', line 86

def run_files
  @args.files.each { |f| @persist_man.load( f ) }
  quit
end

#run_mode ⇒ Object

Run gloo in the selected mode.



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# File 'lib/gloo/app/engine.rb', line 68

def run_mode
  $log.debug "running gloo in #{@mode} mode"

  if @mode == Mode::VERSION
    run_version
  elsif @mode == Mode::HELP
    show_help_and_quit
  elsif @mode == Mode::SCRIPT
    run_files
  else
    run
  end
end

#run_version ⇒ Object

Show the version information and then quit.



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# File 'lib/gloo/app/engine.rb', line 186

def run_version
  puts Info.display_title unless @args.quiet?
  quit
end

#show_help_and_quit ⇒ Object

Show the help information and then quit.



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# File 'lib/gloo/app/engine.rb', line 194

def show_help_and_quit
  @help.show_app_help
  quit
end

#start ⇒ Object

Start the engine. Load object and verb definitions and setup engine elements.



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# File 'lib/gloo/app/engine.rb', line 39

def start
  $log.debug 'starting the engine...'
  $log.debug Info.display_title
  @mode = @args.detect_mode
  @running = true

  @dictionary = Gloo::Core::Dictionary.instance
  @dictionary.init
  @parser = Gloo::Core::Parser.new
  @heap = Gloo::Core::Heap.new
  @factory = Gloo::Core::Factory.new
  @persist_man = Gloo::Persist::PersistMan.new
  @event_manager = Gloo::Core::EventManager.new

  @exec_env = Gloo::Exec::ExecEnv.new
  @help = Gloo::App::Help.new
  @converter = Gloo::Convert::Converter.new

  $log.debug 'the engine has started'
  run_mode
end

#stop_running ⇒ Object

Request the engine to stop running.



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# File 'lib/gloo/app/engine.rb', line 168

def stop_running
  @running = false
end