Takes a screenshot of a webpage every time interval

timelapse.rb

# Requires the command 'pageres' - https://github.com/sindresorhus/pageres

args = ARGV

if args.length < 1
  raise Exception.new 'Must have at least one argument: "website [interval in seconds] [resolution in format 100x100]'
end

url = args[0]
interval = args[1] ? args[1].to_i : 60
resolution = args[2] ? args[2] : '1920x1080'

puts "taking pictures of #{url} at an interval of #{interval} seconds with the resolution #{resolution}"

dir = "#{url}_screenshots"

`mkdir #{dir}`

count = 1

while true
  `cd #{dir}; pageres #{url} #{resolution}`
  file = "#{url}-#{resolution}"
  `cd #{dir}; mv #{file}.png #{file}-#{count}.png`

  count += 1
  sleep interval

  if count % 5 == 0
    puts "taken #{count} screenshots"
  end

end