Class: Rubykon::GroupTracker

Inherits:
Object
  • Object
show all
Defined in:
lib/rubykon/group_tracker.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(groups = {}, stone_to_group = {}) ⇒ GroupTracker

Returns a new instance of GroupTracker.



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# File 'lib/rubykon/group_tracker.rb', line 6

def initialize(groups = {}, stone_to_group = {})
  @groups         = groups
  @stone_to_group = stone_to_group
end

Instance Attribute Details

#groups ⇒ Object (readonly)

Returns the value of attribute groups.



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# File 'lib/rubykon/group_tracker.rb', line 4

def groups
  @groups
end

#stone_to_group ⇒ Object (readonly)

Returns the value of attribute stone_to_group.



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# File 'lib/rubykon/group_tracker.rb', line 4

def stone_to_group
  @stone_to_group
end

Instance Method Details

#assign(identifier, color, board) ⇒ Object 



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# File 'lib/rubykon/group_tracker.rb', line 11

def assign(identifier, color, board)
  neighbours_by_color = color_to_neighbour(board, identifier)
  join_group_of_friendly_stones(neighbours_by_color[color], identifier)
  create_own_group(identifier) unless group_id_of(identifier)
  add_liberties(neighbours_by_color[Board::EMPTY], identifier)
  take_liberties_of_enemies(neighbours_by_color[Game.other_color(color)], identifier, board, color)
end

#dup ⇒ Object 



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# File 'lib/rubykon/group_tracker.rb', line 39

def dup
  self.class.new(dup_groups, @stone_to_group.dup)
end

#group(id) ⇒ Object 



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# File 'lib/rubykon/group_tracker.rb', line 31

def group(id)
  @groups[id]
end

#group_id_of(identifier) ⇒ Object 



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# File 'lib/rubykon/group_tracker.rb', line 23

def group_id_of(identifier)
  @stone_to_group[identifier]
end

#group_of(identifier) ⇒ Object 



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# File 'lib/rubykon/group_tracker.rb', line 27

def group_of(identifier)
  group(group_id_of(identifier))
end

#liberty_count_at(identifier) ⇒ Object 



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# File 'lib/rubykon/group_tracker.rb', line 19

def liberty_count_at(identifier)
  group_of(identifier).liberty_count
end

#stone_joins_group(stone_identifier, group_identifier) ⇒ Object 



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# File 'lib/rubykon/group_tracker.rb', line 35

def stone_joins_group(stone_identifier, group_identifier)
  @stone_to_group[stone_identifier] = group_identifier
end