Module: TimeIntervalsToString

Defined in:
lib/time_subtract/time_intervals_to_string.rb

Class Method Summary collapse

Class Method Details

.interval_to_string(arg_hash) ⇒ Object 



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# File 'lib/time_subtract/time_intervals_to_string.rb', line 2

def self.interval_to_string arg_hash
  # Raise Wrong Argument Type Error

  if !(arg_hash.is_a? Hash)
    raise 'WrongArgumentType'
  end

  order = [:year, :month, :day, :hour, :minute, :second]

  # Keep only selected key values

  arg_hash.keep_if{|k, v| order.include? k}

  # No Key match exception

  if arg_hash.blank?
    raise 'NoKeyMatch'
  end

  # Order the hash with our order

  ordered_hash = Hash[arg_hash.sort_by {|k, _| order.index k}] 

  out_string = [] 
  ordered_hash.each do |interval, value|
    out_string  << "#{value} #{interval.to_s.pluralize(value)}" unless value.zero?
  end
  out_string.join(' ')
end