Class: HumanDate::DateTranslator

Inherits:
Object
  • Object
show all
Defined in:
lib/human-date/date_translator.rb

Constant Summary collapse

TIME = 
{
  :year     => 365 * 24 * 60 * 60,
  :month    => 30 * 24 * 60 * 60,
  :day      => 24 * 60 * 60,
  :hour     => 60 * 60,
  :minute   => 60,
  :second   => 1
}

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ DateTranslator

Returns a new instance of DateTranslator.



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# File 'lib/human-date/date_translator.rb', line 16

def initialize
  @tolerance = 1
  @parts = TIME.keys
end

Instance Attribute Details

#parts ⇒ Object

Returns the value of attribute parts.



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# File 'lib/human-date/date_translator.rb', line 5

def parts
  @parts
end

#tolerance ⇒ Object

Returns the value of attribute tolerance.



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# File 'lib/human-date/date_translator.rb', line 5

def tolerance
  @tolerance
end

Instance Method Details

#translate(from, to) ⇒ Object 



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# File 'lib/human-date/date_translator.rb', line 21

def translate from, to
  total_difference_in_seconds = ((to-from) * 60 * 60 * 24).to_i
  absolute_total_difference_in_seconds = total_difference_in_seconds.abs
  return 'now' if absolute_total_difference_in_seconds <= tolerance

  words = []
  parts.each do |key|
    if absolute_total_difference_in_seconds >= TIME[key]
      count = 0
      while absolute_total_difference_in_seconds >= TIME[key]
        absolute_total_difference_in_seconds -= TIME[key]
        count += 1
      end
      word = "#{count} #{key}"
      word += 's' if count >= 2
      words << word
    end
  end

  sentence = join_words(words)
  sentence += ' ago' if total_difference_in_seconds < 0
  sentence
end