tibira

gistfile1.txt

@keyboard = []
@keyboard[0] = ['1','2','3','4','5','6','7','8','9','0']
@keyboard[1] = ['q','w','e','r','t','y','u','i','o','p']
@keyboard[2] = ['a','s','d','f','g','h','j','k','l',';']
@keyboard[3] = ['z','x','c','v','b','n','m',',','.','/']

def find_position(caractere)
  @keyboard.each_with_index do |row, index|
    col = row.index(caractere)
    return [index, col] unless col.nil?
  end

  return nil
end

def h(char)
  position = find_position(char)
  return char if position.nil?
  return @keyboard[position[0]].reverse[position[1]]
end

def v(char)
  position = find_position(char)
  return char if position.nil?

  tmp_arr = [@keyboard[0][position[1]],
             @keyboard[1][position[1]],
             @keyboard[2][position[1]],
             @keyboard[3][position[1]]
            ]

  vert_position = tmp_arr.index(char)
  return tmp_arr.reverse[vert_position]
end

def shf(char, index)
  big_list = @keyboard.flatten
  position = big_list.index(char)  
  return char if position.nil?

  big_list.rotate(position + index).first
end

def transf(commands, text)
  transformed_text = ""

  text.split("").each do |char|
    transformed_char = char 
    
    commands.split(",").each do |transformation|
      transformed_char = h(transformed_char) if transformation == 'H'
      transformed_char = v(transformed_char) if transformation == 'V'
      transformed_char = shf(transformed_char, transformation.to_i) if transformation.to_i != 0
    end  
    
    transformed_text = transformed_text + transformed_char
  end
  
  transformed_text
end


transf("H,V,H,1", "rty")

transf("H,V,H,5,V,-12", "some big text file")