Continuous Screen Capture Script for xbar

screen-capture.1m.rb

#! /usr/bin/ruby
require 'logger'
require 'json'

LOGGER = Logger.new(STDOUT)

if ENV['DEBUG']
  LOGGER.level = Logger::Severity::DEBUG
else
  LOGGER.level = Logger::Severity::WARN
end

OUTPUT_DIR=File.join(Dir.home, 'Desktop', 'continuous-screen-capture')
MAX_AGE=3600 * 24 * 7

unless File.exists?(OUTPUT_DIR)
  LOGGER.debug "Creating output directory: #{OUTPUT_DIR}"
  Dir.mkdir(OUTPUT_DIR)
end

def capture_screenshot
  display_info = `system_profiler SPDisplaysDataType -json`
  display_ids = JSON.parse(display_info)['SPDisplaysDataType'].first['spdisplays_ndrvs'].map{|display| display['_spdisplays_displayID'] }

  output_filenames = display_ids.map { | display_id|
    File.join(OUTPUT_DIR, "#{Time.now.strftime('%Y%m%d-%H%M%S')}-#{display_id}.jpg")
  }
  LOGGER.debug "Capturing screenshot to #{output_filenames.join(' ')}"
  system "screencapture", "-x", "-t", "jpg", "-T", "0", *output_filenames
end

def delete_old_screenshots
  all_files = Dir.glob("#{OUTPUT_DIR}/*.jpg").sort
  all_files.each{|file|
    enough_old = (Time.now - File.mtime(file)) > MAX_AGE
    if enough_old
      LOGGER.debug "Deleting old file: #{file}"
      File.delete(file)
    end
  }
end

capture_screenshot
delete_old_screenshots

puts "📸 #{Time.now.strftime('%H:%M:%S')}"