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# frozen_string_literal: true
#
# https://www.perpetual-beta.org/weblog/estimated-reading-time-in-nanoc.html
#
# Count the number of words in the document and, assuming the average
# reading speed by words-per-minute, calculate the time taken in
# minutes to read the given number of words. If there are any seconds
# in the estimated reading time, then increment the minutes by one.
#
module Nanoc::Helpers
module ReadingTimeHelper
#
# Words per minute
# http://en.wikipedia.org/wiki/Words_per_minute#Reading_and_comprehension
#
# This is a rough estimate and given that the algorithm to find the words
# is very simple, it's best to overcalculate and increase the WPM.
# Otherwise, we end up with big reading time numbers.
#
WPM = 230
def reading_time(words)
minutes = (words / WPM).ceil
seconds = (words % WPM / (WPM / 60)).floor
if seconds.positive?
minutes += 1
end
(minutes <= 1 ? 'about a minute' : "~#{minutes} minutes")
end
end
end
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