Classify Photos and Movies Downloaded from Android Phone into nested directories by Year, Month and Day

rename_media.rb

#!/usr/bin/env ruby

require "fileutils"
require "rake"

ROOT = File.expand_path(ARGV[0] || ".", Dir.pwd)
ANDROID_MATCH = /
  \/                # The whole file name
  (IMG|VID)         # starts with an image or film indicator.
  _                 # An underscore is followed by
  (?<year>\d{4})    # year,
  (?<month>\d{2})   # month,
  (?<day>\d{2})     # and day.
  _                 # Another underscore is followed by
  (?<time>[^\.]+)   # time
  \.
  (?<extension>\w+) # An extension
  $                 # completes the name.
/x

puts "Scanning for files in #{ROOT}"

# Classify photo and film files

glob = File.join(ROOT, "*.{jpg,mp4}")
Dir.glob(glob, base: ROOT)

file_list = FileList.new(glob)
file_list.each do |file|
  m = file.match(ANDROID_MATCH)
  next if !m
  destination_directory = File.join(ROOT, m[:year], m[:year] + m[:month], m[:year] + m[:month] + m[:day])
  destination_file = m[:time] + "." + m[:extension].downcase
  puts "#{file} -> #{File.join(destination_directory, destination_file)}"
  mkdir_p destination_directory
  mv file, File.join(destination_directory, destination_file)
end