Chunk Time in ruby

chunk_time.rb

TIME_CHUNK_INTERVAL = 10.hours

# [[start,end], [start,end]...]
def fetch_time_chunks(start_time, end_time, time_interval = nil)
  interval = time_interval || TIME_CHUNK_INTERVAL

  time_delta = end_time - start_time
  number_of_chunks = (time_delta / interval).to_i

  return [[start_time, end_time]] if number_of_chunks == 0

  chunks = (number_of_chunks.times).map.with_index { |chunk, idex|
    interval_start_time = (start_time.to_i + (interval.to_i * (idex)))
    interval_end_time = interval_start_time + interval

    [interval_start_time, interval_end_time]
  }

  chunks[-1] = [chunks.last.first, end_time]

  chunks.map { |chunk|
    [Time.at(chunk.first), Time.at(chunk.last)]
  }
end