Class: StackWars::Battlefield

Inherits:
Object
  • Object
show all
Defined in:
lib/stack_wars/battlefield.rb

Constant Summary collapse

SIZE = 
9
WHITE_BASELINE = 
0
BLACK_BASELINE = 
SIZE - 1

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(territories = nil) ⇒ Battlefield

Returns a new instance of Battlefield.



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# File 'lib/stack_wars/battlefield.rb', line 25

def initialize(territories=nil)
  if territories
    @territories = territories
  else
    @territories = 
      SIZE.times.map { |y| SIZE.times.map { |x| Territory.new([x,y]) } }   
  end
end

Class Method Details

.from_json(json_file) ⇒ Object 



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# File 'lib/stack_wars/battlefield.rb', line 7

def self.from_json(json_file)
  territory_data = JSON.parse(File.read(json_file))

  territories = territory_data.map.with_index do |row, y|
    row.map.with_index do |t, x|
      occupant, strength = t
      if occupant == "unclaimed"
        Territory.new([x,y])
      else
        Territory.new([x,y], :occupant      => occupant, 
                             :army_strength => strength)
      end
    end
  end
  
  new(territories)
end

Instance Method Details

#[](x, y) ⇒ Object 



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# File 'lib/stack_wars/battlefield.rb', line 34

def[](x,y)
  unless [x,y].all? { |c| (WHITE_BASELINE..BLACK_BASELINE).include?(c) }
    raise Errors::OutOfBounds 
  end

  @territories[y][x]
end

#adjacent?(pos1, pos2) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/stack_wars/battlefield.rb', line 42

def adjacent?(pos1, pos2)
  (pos1.row == pos2.row && (pos1.column - pos2.column).abs == 1) ||
  (pos2.column == pos2.column && (pos1.row - pos2.row).abs == 1)
end

#deployed_armies(player) ⇒ Object 



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# File 'lib/stack_wars/battlefield.rb', line 47

def deployed_armies(player)
  # FIXME: Inefficient, can probably store integer values on write
  @territories.flatten.reduce(0) do |s, t| 
     s + (t.occupant == player.color ? t.army_strength : 0)
  end
end

#inspect ⇒ Object

loses instance variables, but better than hitting to_s() by default



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# File 'lib/stack_wars/battlefield.rb', line 55

alias_method :inspect, :to_s

#to_a ⇒ Object 



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# File 'lib/stack_wars/battlefield.rb', line 61

def to_a
  Marshal.load(Marshal.dump(@territories))
end

#to_s ⇒ Object 



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# File 'lib/stack_wars/battlefield.rb', line 57

def to_s
  TextDisplay.new(to_a).to_s
end