Module: SwedbankPay::ReadTimeFilter

Defined in:
lib/read_time_filter.rb

Overview

Installation: drop this into your _plugins folder Usage: page.content | read_time } Note: this requires img tags to be in the form of <img … />. If you’re using this on a post listing page, make sure to markdownify the post content first.

Instance Method Summary collapse

Instance Method Details

#read_time(input) ⇒ Object 



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# File 'lib/read_time_filter.rb', line 14

def read_time(input)
  words_per_minute = 275
  # number of seconds per image to start at, default is 12s
  img_time_max = 12
  # time per image will decrease by 1 for every image, to a minimum
  # of this time, default is 3s
  img_time_min = 3

  strings = input.split(%r{<img.* />})

  seconds = (strings.join(' ').split.size.to_f / (words_per_minute / 60))

  # number of images minus one for correct number of iterations
  (strings.size - 2).times do |i|
    t = (img_time_max - i)
    image_time = [t, img_time_min].max
    seconds += image_time
  end

  minutes = (seconds / 60).ceil

  "#{minutes} min read"
end