Class: Card

Inherits:
Object
  • Object
show all
Includes:
Comparable
Defined in:
lib/rubycards/card.rb

Constant Summary collapse

CLUB =

constants for glyphs

'♣'
DIAMOND = 
'♦'
HEART = 
'♥'
SPADE = 
'♠'

Instance Method Summary collapse

Constructor Details

#initialize(rank = 'Ace', suit = 'Spades') ⇒ Card

Returns a new instance of Card.



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# File 'lib/rubycards/card.rb', line 14

def initialize(rank = 'Ace', suit = 'Spades')
  @rank = rank_to_i(rank)
  @suit = suit_to_i(suit)
end

Instance Method Details

#<=>(c) ⇒ Object

comparator



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# File 'lib/rubycards/card.rb', line 51

def <=>(c)
  self.to_i <=> c.to_i
end

#rank(short = false) ⇒ Object

returns the rank of the card optional short parameter will limit face cards to one character



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# File 'lib/rubycards/card.rb', line 21

def rank(short = false)
  if (2..10) === @rank
    @rank.to_s
  else
    h = { 11 => 'Jack', 12 => 'Queen', 13 => 'King', 14 => 'Ace' }
    h[@rank] && short ? h[@rank][0] : h[@rank]
  end
end

#short ⇒ Object

returns the short rank, followed by suit icon



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# File 'lib/rubycards/card.rb', line 46

def short
  "#{rank(true)}#{suit(true)}"
end

#suit(glyph = false) ⇒ Object

returns the suit of a card optional glyph parameter displays a colored unicode character



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# File 'lib/rubycards/card.rb', line 32

def suit(glyph = false)
  case @suit
    when 1
      glyph ? CLUB.black.bold : 'Clubs'
    when 2
      glyph ? DIAMOND.red : 'Diamonds'
    when 3
      glyph ? HEART.red : 'Hearts'
    when 4
      glyph ? SPADE.black.bold : 'Spades'
  end
end

#to_i ⇒ Object

returns the numerical representation of the rank



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# File 'lib/rubycards/card.rb', line 56

def to_i
  @rank
end

#to_s ⇒ Object

draws a card picture



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# File 'lib/rubycards/card.rb', line 61

def to_s
  # A simple template with X's as placeholders
  # YY represents the placement of the card's rank
  template = <<-TPL.gsub(/^\s+/,'')
    ╭───────╮
    | X X X |
    | X X X |
    | X YYX |
    | X X X |
    ╰───────╯
  TPL

  # the patterns represent the configuration of glyphys
  #   read from left to right, top to bottom
  # X means place a glyph, _ means clear the space
  case @rank
    when 2;  pattern = '_X_______X_'
    when 3;  pattern = '_X__X____X_'
    when 4;  pattern = 'X_X_____X_X'
    when 5;  pattern = 'X_X_X___X_X'
    when 6;  pattern = 'X_XX_X__X_X'
    when 7;  pattern = 'X_X_X_XXX_X'
    when 8;  pattern = 'X_XX_XXXX_X'
    when 9;  pattern = 'X_XXXXXXX_X'
    when 10; pattern = 'XXXX_XXXXXX'
    when 11..14;
      pattern = 'X_________X'
  end

  pattern.each_char do |c|
    # replace X's with glyphs
    if c == 'X'
      template.sub!(/X/, "#{suit(true)}")
    # replace _'s with whitespace
    else
      template.sub!(/X/, " ")
    end
  end

  # place the card rank (left-padded)
  template.sub(/YY/, rank(true).ljust(2))
end