Class: Question::CheckboxList

Inherits:
Object
  • Object
show all
Defined in:
lib/question/checkbox_list.rb

Instance Method Summary collapse

Constructor Details

#initialize(question, choices, default: []) ⇒ CheckboxList

Returns a new instance of CheckboxList.



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# File 'lib/question/checkbox_list.rb', line 3

def initialize(question, choices, default: [])
  @question = question
  @choices = choices
  @active_index = 0
  @finished = false
  @modified = false

  default_values = default.map { |choice| value_for_choice(choice) }
  @selected_choices = choices.select do |choice|
    default_values.include? value_for_choice(choice)
  end
end

Instance Method Details

#ask ⇒ Object 



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# File 'lib/question/checkbox_list.rb', line 24

def ask
  TTY.interactive do
    while !@finished
      render
      handle_input
    end
    render # render the results a final time and clear the screen
  end

  @selected_choices.map { |choice| value_for_choice(choice) }
end

#handle_input ⇒ Object 



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# File 'lib/question/checkbox_list.rb', line 36

def handle_input
  input = TTY.input
  case input
  when TTY::CODE::SIGINT
    exit 130
  when TTY::CODE::RETURN
    @finished = true
  when TTY::CODE::DOWN, TTY::CODE::CTRL_J, TTY::CODE::CTRL_N
    @active_index += 1
    @active_index = 0 if @active_index >= @choices.length
  when TTY::CODE::UP, TTY::CODE::CTRL_K, TTY::CODE::CTRL_P
    @active_index -= 1
    @active_index = @choices.length - 1 if @active_index < 0
  when TTY::CODE::SPACE
    @modified = true
    active_choice = @choices[@active_index]
    if @selected_choices.include? active_choice
      @selected_choices.delete(active_choice)
    else
      @selected_choices.push(active_choice)
    end
  end
end

#instructions ⇒ Object 



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# File 'lib/question/checkbox_list.rb', line 60

def instructions
  "(Use <space>, <up>, <down> – Press <enter> when finished)"
end

#label_for_choice(choice) ⇒ Object 



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# File 'lib/question/checkbox_list.rb', line 16

def label_for_choice(choice)
  choice.is_a?(Hash) ? choice[:label] : choice
end

#render ⇒ Object 



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# File 'lib/question/checkbox_list.rb', line 64

def render
  TTY.clear
  print "? ".cyan
  print @question
  print ": "
  if @finished
    print @selected_choices.map { |choice| label_for_choice(choice) }.join(", ").green
  elsif @modified
    print @selected_choices.map { |choice| label_for_choice(choice) }.join(", ")
  else
    print instructions.light_white
  end
  print "\n"

  unless @finished
    @choices.each_with_index do |choice, index|
      print index == @active_index ? TTY::UI::SELECTED : TTY::UI::UNSELECTED
      print " "
      if @selected_choices.include?(choice)
        print TTY::UI::CHECKBOX_CHECKED.green
      else
        print TTY::UI::CHECKBOX_UNCHECKED.red
      end
      print "  "
      print label_for_choice(choice)
      print "\n"
    end
    print TTY::CODE::NOOP
  end
end

#value_for_choice(choice) ⇒ Object 



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# File 'lib/question/checkbox_list.rb', line 20

def value_for_choice(choice)
  choice.is_a?(Hash) ? choice[:value] : choice
end