Class: TableFormatterSimple

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

Instance Method Summary collapse

Constructor Details

#initialize ⇒ TableFormatterSimple

Returns a new instance of TableFormatterSimple.



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# File 'lib/table_formatter_simple.rb', line 2

def initialize
  @space_num = 1
  @padstr = ' '
end

Instance Method Details

#to_table(data) ⇒ Object 



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# File 'lib/table_formatter_simple.rb', line 7

def to_table(data)
  return if data.empty?

  data2hash   = {}
  length_data = {}
  formatted_data = ''

  data.each do |d|
    d.keys.each do |k|
      data2hash[k] ||= []
      data2hash[k] << d[k]
    end
  end
  data2hash.keys.each do |k|
    length_data[k] = (data2hash[k].max_by { |f| f.to_s.length }).to_s.length + @space_num * 2
  end

  key_list = data2hash.keys

  cover = ''
  key_list.each do |k|
    cover << '+'
    cover << '-' * length_data[k]
  end
  cover << "+\n"
  formatted_data << cover

  index = ''
  key_list.each do |k|
    index << '|'
    index << @padstr * @space_num
    index << k.to_s.ljust(length_data[k] - @space_num, @padstr)
  end
  index  << "|\n"
  formatted_data << index

  formatted_data << cover

  rows = ''
  data.each do |d|
    row = ''
    key_list.each do |k|
      row << '|'
      row << @padstr * @space_num
      row << d[k].to_s.ljust(length_data[k] - @space_num, @padstr)
    end
    row << "|\n"
    rows << row
  end
  formatted_data << rows
  formatted_data << cover

  formatted_data
end