Class: Gloo::Objs::Menu

Inherits:
GlooLang::Core::Obj
  • Object
show all
Defined in:
lib/gloo/objs/cli/menu.rb

Constant Summary collapse

KEYWORD = 
'menu'.freeze
KEYWORD_SHORT = 
'menu'.freeze
PROMPT = 
'prompt'.freeze
ITEMS = 
'items'.freeze
LOOP = 
'loop'.freeze
HIDE_ITEMS = 
'hide_items'.freeze
BEFORE_MENU = 
'before_menu'.freeze
DEFAULT = 
'default'.freeze

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.messages ⇒ Object

Get a list of message names that this object receives.



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# File 'lib/gloo/objs/cli/menu.rb', line 91

def self.messages
  return super + [ 'run' ]
end

.short_typename ⇒ Object

The short name of the object type.



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# File 'lib/gloo/objs/cli/menu.rb', line 32

def self.short_typename
  return KEYWORD_SHORT
end

.typename ⇒ Object

The name of the object type.



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# File 'lib/gloo/objs/cli/menu.rb', line 25

def self.typename
  return KEYWORD
end

Instance Method Details

#add_children_on_create? ⇒ Boolean

Does this object have children to add when an object is created in interactive mode? This does not apply during obj load, etc.

Returns:

  • (Boolean) 


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# File 'lib/gloo/objs/cli/menu.rb', line 67

def add_children_on_create?
  return true
end

#add_default_children ⇒ Object

Add children to this object. This is used by containers to add children needed for default configurations.



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# File 'lib/gloo/objs/cli/menu.rb', line 76

def add_default_children
  fac = @engine.factory
  fac.create_string PROMPT, '> ', self
  fac.create_can ITEMS, self
  fac.create_bool LOOP, true, self
  fac.create_script DEFAULT, '', self
end

#begin_menu ⇒ Object

Begin the menu execution. Run the before menu script if there is one, then show options unless we are hiding them by default.



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# File 'lib/gloo/objs/cli/menu.rb', line 124

def begin_menu
  run_before_menu

  # Check to see if we should show items at all.
  o = find_child HIDE_ITEMS
  return if o && o.value == true

  show_options
end

#find_cmd(cmd) ⇒ Object

Find the command matching user input.



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# File 'lib/gloo/objs/cli/menu.rb', line 160

def find_cmd( cmd )
  o = find_child ITEMS
  return nil unless o

  o.children.each do |mitem|
    mitem = GlooLang::Objs::Alias.resolve_alias( @engine, mitem )
    return mitem if mitem.shortcut_value.downcase == cmd.downcase
  end

  return nil
end

#loop? ⇒ Boolean

Get the value of the loop child object. Should we keep looping or should we stop?

Returns:

  • (Boolean) 


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# File 'lib/gloo/objs/cli/menu.rb', line 51

def loop?
  o = find_child LOOP
  return false unless o

  return o.value
end

#msg_run ⇒ Object

Show the menu options, and prompt for user input.



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# File 'lib/gloo/objs/cli/menu.rb', line 98

def msg_run
  run_default
  loop do
    begin_menu
    if prompt_value.empty?
      dt = DateTime.now
      d = dt.strftime( '%Y.%m.%d' )
      t = dt.strftime( '%I:%M:%S' )
      cmd = @engine.platform.prompt.ask( "#{d.yellow} #{t.white} >" )
    else
      cmd = @engine.platform.prompt.ask( prompt_value )
    end
    cmd ? run_command( cmd ) : run_default
    break unless loop?
  end
end

#prompt_value ⇒ Object

Get the value of the prompt child object. Returns nil if there is none.



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# File 'lib/gloo/objs/cli/menu.rb', line 40

def prompt_value
  o = find_child PROMPT
  return '' unless o

  return o.value
end

#run_before_menu ⇒ Object

If there is a before menu script, run it now.



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# File 'lib/gloo/objs/cli/menu.rb', line 137

def run_before_menu
  o = find_child BEFORE_MENU
  return unless o

  GlooLang::Exec::Dispatch.message( @engine, 'run', o )
end

#run_command(cmd) ⇒ Object

Run the selected command.



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# File 'lib/gloo/objs/cli/menu.rb', line 186

def run_command( cmd )
  obj = find_cmd cmd

  unless obj
    if cmd == '?'
      show_options
    else
      puts "#{cmd} is not a valid option"
    end
    return
  end

  script = obj.do_script
  return unless script

  s = GlooLang::Exec::Script.new( @engine, script )
  s.run
end

#run_default ⇒ Object

Run the default option.



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# File 'lib/gloo/objs/cli/menu.rb', line 175

def run_default
  obj = find_child DEFAULT
  return unless obj

  s = GlooLang::Exec::Script.new( @engine, obj )
  s.run
end

#show_options ⇒ Object

Show the list of menu options.



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# File 'lib/gloo/objs/cli/menu.rb', line 147

def show_options
  o = find_child ITEMS
  return unless o

  o.children.each do |mitem|
    mitem = GlooLang::Objs::Alias.resolve_alias( @engine, mitem )
    puts "  #{mitem.shortcut_value} - #{mitem.description_value}"
  end
end