Class: MineHunt::Board

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

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(number_of_mines = 20, height = 8, width = 16) ⇒ Board

Returns a new instance of Board.



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# File 'lib/minehunt.rb', line 32

def initialize( number_of_mines = 20, height = 8, width = 16 )
  @height = height
  @width = width
  @explorer_x = 0
  @explorer_y = 0
  @score = 1
  @field = {}
  @number_of_mines = if number_of_mines.negative? && number_of_mines > ((@height * @width) - 2)
                       20
                     else
                       number_of_mines
                     end

  @width.times do |x|
    @height.times do |y|
      @field[[x, y]] = Cell.new( open: x.zero? && y.zero? )
    end
  end

  placed_mines = 0
  while placed_mines < @number_of_mines
    coordinates = [rand( @width ), rand( @height )]
    next if coordinates == [0, 0]
    next if @field[ coordinates ].mine

    @field[ coordinates ].mine = true
    placed_mines += 1
  end
end

Instance Attribute Details

#explorer_x ⇒ Object (readonly)

Returns the value of attribute explorer_x.



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# File 'lib/minehunt.rb', line 24

def explorer_x
  @explorer_x
end

#explorer_y ⇒ Object (readonly)

Returns the value of attribute explorer_y.



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# File 'lib/minehunt.rb', line 24

def explorer_y
  @explorer_y
end

#field ⇒ Object (readonly)

Returns the value of attribute field.



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# File 'lib/minehunt.rb', line 24

def field
  @field
end

#height ⇒ Object (readonly)

Returns the value of attribute height.



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# File 'lib/minehunt.rb', line 24

def height
  @height
end

#number_of_mines ⇒ Object (readonly)

Returns the value of attribute number_of_mines.



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# File 'lib/minehunt.rb', line 24

def number_of_mines
  @number_of_mines
end

#score ⇒ Object (readonly)

Returns the value of attribute score.



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# File 'lib/minehunt.rb', line 24

def score
  @score
end

#width ⇒ Object (readonly)

Returns the value of attribute width.



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# File 'lib/minehunt.rb', line 24

def width
  @width
end

Instance Method Details

#count_nearby_mines ⇒ Object 



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# File 'lib/minehunt.rb', line 103

def count_nearby_mines
  counter = 0

  [@explorer_x - 1, @explorer_x, @explorer_x + 1].each do |x|
    [@explorer_y - 1, @explorer_y, @explorer_y + 1].each do |y|
      next if x.negative?
      next if y.negative?
      next if x == @width
      next if y == @height
      next if x == @explorer_x && y == @explorer_y

      counter += 1 if @field[[x, y]].mine
    end
  end

  counter
end

#move(direction) ⇒ Object 



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# File 'lib/minehunt.rb', line 95

def move( direction )
  update_explorer_location( direction )
  @score += 1 unless @field[[@explorer_x, @explorer_y]].open

  { dead: @field[[@explorer_x, @explorer_y]].explore,
    victory: @explorer_x == (@width - 1) && @explorer_y == (@height - 1) }
end

#update_explorer_location(direction) ⇒ Object 



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# File 'lib/minehunt.rb', line 62

def update_explorer_location( direction )
  case direction
  when 'up'
    @explorer_y -= 1 if @explorer_y.positive?
  when 'right'
    @explorer_x += 1 if @explorer_x < (@width - 1)
  when 'down'
    @explorer_y += 1 if @explorer_y < (@height - 1)
  when 'left'
    @explorer_x -= 1 if @explorer_x.positive?
  when 'up-right'
    if @explorer_x < (@width - 1) && @explorer_y.positive?
      @explorer_x += 1
      @explorer_y -= 1
    end
  when 'down-right'
    if @explorer_x < (@width - 1) && @explorer_y < (@height - 1)
      @explorer_x += 1
      @explorer_y += 1
    end
  when 'down-left'
    if @explorer_x.positive? && @explorer_y < (@height - 1)
      @explorer_x -= 1
      @explorer_y += 1
    end
  when 'up-left'
    if @explorer_x.positive? && @explorer_y.positive?
      @explorer_x -= 1
      @explorer_y -= 1
    end
  end
end