Module: Seimi::Sangi

Defined in:
lib/seimi/sangi.rb

Constant Summary collapse

CELL_WIDTH = 
5
CELL_HEIGHT = 
5

Class Method Summary collapse

Class Method Details

.blank_cell ⇒ Object 



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# File 'lib/seimi/sangi.rb', line 58

def blank_cell
  Array.new(CELL_HEIGHT, " " * CELL_WIDTH)
end

.body_lines(cells) ⇒ Object 



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# File 'lib/seimi/sangi.rb', line 48

def body_lines(cells)
  (0...CELL_HEIGHT).map do |line|
    "│#{cells.map { |cell| cell[line] }.join("│")}│"
  end
end

.empty_cell ⇒ Object 



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# File 'lib/seimi/sangi.rb', line 62

def empty_cell
  ["     ", "     ", " [ ] ", "     ", "     "]
end

.frame(left, middle, right, count) ⇒ Object 



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# File 'lib/seimi/sangi.rb', line 54

def frame(left, middle, right, count)
  "#{left}#{Array.new(count, "─" * CELL_WIDTH).join(middle)}#{right}"
end

.horizontal_cell(digit) ⇒ Object 



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# File 'lib/seimi/sangi.rb', line 35

def horizontal_cell(digit)
  return empty_cell if digit.zero?

  rows = blank_cell
  if digit <= 5
    digit.times { |index| rows[CELL_HEIGHT - 1 - index] = " --- " }
  else
    rows[0] = "  |  "
    (digit - 5).times { |index| rows[CELL_HEIGHT - 1 - index] = " --- " }
  end
  rows
end

.render(number) ⇒ Object 



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# File 'lib/seimi/sangi.rb', line 10

def render(number)
  digits = Integer(number).abs.digits.reverse
  cells = digits.each_with_index.map do |digit, index|
    power = digits.length - index - 1
    power.even? ? vertical_cell(digit) : horizontal_cell(digit)
  end

  [frame("┌", "┬", "┐", cells.length),
   *body_lines(cells),
   frame("└", "┴", "┘", cells.length)].join("\n")
end

.vertical_cell(digit) ⇒ Object 



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# File 'lib/seimi/sangi.rb', line 22

def vertical_cell(digit)
  return empty_cell if digit.zero?

  rows = blank_cell
  if digit <= 5
    digit.times { |index| rows[index] = "  |  " }
  else
    rows[0] = " --- "
    (digit - 5).times { |index| rows[index + 1] = "  |  " }
  end
  rows
end