Class: FortuneTeller::Chooser

Inherits:
Object
  • Object
show all
Defined in:
lib/fortune_teller/chooser.rb

Constant Summary collapse

LOCATIONS = 
[ :tl, :tr, :bl, :br ]

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(_tl_panel, _tr_panel, options = {}) ⇒ Chooser

Returns a new instance of Chooser.



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# File 'lib/fortune_teller/chooser.rb', line 25

def initialize(_tl_panel, _tr_panel, options = {})
  @ui = options[:ui]
  @tl_panel = _tl_panel
  Logger.log "tl_panel: #{@tl_panel}"
  @tr_panel = _tr_panel
  Logger.log "tr_panel: #{@tr_panel}"
  @bl_panel = options[:bl_panel] || NilPanel.new(@ui)
  Logger.log "bl_panel: #{@bl_panel}"
  @br_panel = options[:br_panel] || NilPanel.new(@ui)
  Logger.log "br_panel: #{@br_panel}"
  @list_renderer = options[:list_renderer] || ListRenderer.new
  define_selection_aliases
end

Instance Attribute Details

#bl_panel ⇒ Object (readonly)

Returns the value of attribute bl_panel.



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# File 'lib/fortune_teller/chooser.rb', line 23

def bl_panel
  @bl_panel
end

#br_panel ⇒ Object (readonly)

Returns the value of attribute br_panel.



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# File 'lib/fortune_teller/chooser.rb', line 23

def br_panel
  @br_panel
end

#list_renderer ⇒ Object (readonly)

Returns the value of attribute list_renderer.



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# File 'lib/fortune_teller/chooser.rb', line 24

def list_renderer
  @list_renderer
end

#tl_panel ⇒ Object (readonly)

Returns the value of attribute tl_panel.



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# File 'lib/fortune_teller/chooser.rb', line 23

def tl_panel
  @tl_panel
end

#tr_panel ⇒ Object (readonly)

Returns the value of attribute tr_panel.



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# File 'lib/fortune_teller/chooser.rb', line 23

def tr_panel
  @tr_panel
end

#ui ⇒ Object (readonly)

Returns the value of attribute ui.



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# File 'lib/fortune_teller/chooser.rb', line 24

def ui
  @ui
end

Class Method Details

.random_choice(choices) ⇒ Object 



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# File 'lib/fortune_teller/chooser.rb', line 19

def self.random_choice(choices)
  choices[rand(choices.size)]
end

.reduce_choices!(choices, by = random_choice(choices)) ⇒ Object 



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# File 'lib/fortune_teller/chooser.rb', line 15

def self.reduce_choices!( choices, by=random_choice(choices) )
  choices.delete(by)
end

.subset(list, num = list.size) ⇒ Object 



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# File 'lib/fortune_teller/chooser.rb', line 7

def self.subset(list, num=list.size)
  Logger.log("got list: #{list.inspect}, num: #{num.inspect}")
  choices = list.dup
  num.times.collect {|num|
    reduce_choices!(choices)
  }
end

Instance Method Details

#choose ⇒ Object 



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# File 'lib/fortune_teller/chooser.rb', line 70

def choose
  choice = nil
  begin
    ui.clear_screen
    choice = ui.prompt( list_renderer.render( selections | [:exit] ) )
    Logger.log("got: #{choice.inspect}")
  end until( valid?( choice ) )
  Logger.log("trying it...")
  ui.clear_screen(1)
  # need to unalias methods...
  send( choice )
end

#define_selection_aliases ⇒ Object 



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# File 'lib/fortune_teller/chooser.rb', line 52

def define_selection_aliases
  selections_hash.each_pair do |k,v|
    self.class.send(:alias_method, v.to_s.to_sym, k)
  end
end

#exit ⇒ Object Also known as: Q, q 



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# File 'lib/fortune_teller/chooser.rb', line 62

def exit
  yield if block_given?
  Logger.log "exiting..."
  Kernel.exit
end

#selections ⇒ Object 



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# File 'lib/fortune_teller/chooser.rb', line 48

def selections
  selections_hash.values
end

#selections_hash ⇒ Object 



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# File 'lib/fortune_teller/chooser.rb', line 39

def selections_hash
  LOCATIONS.reduce({}) {|memo, location|
    if (value = send( "#{location}_panel" )).present?
      memo[location] = value
    end
    memo
  }
end

#valid?(choice) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fortune_teller/chooser.rb', line 58

def valid? choice
  respond_to? choice
end