# Copyright (c) 2021-2024 Andy Maleh
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

class GlimmerTetris
  module Model
    class Block
      COLOR_CLEAR = :white
    
      attr_accessor :color
      
      # Initializes with color. Default color (gray) signifies an empty block
      def initialize(color = COLOR_CLEAR)
        @color = color
      end
      
      # Clears block color. `quietly` option indicates if it should not notify observers by setting value quietly via variable not attribute writer.
      def clear
        self.color = COLOR_CLEAR unless self.color == COLOR_CLEAR
      end
      
      def clear?
        self.color == COLOR_CLEAR
      end
      
      def occupied?
        !clear?
      end
    end
  end
end