canonify_imgnames

#!/usr/bin/env ruby

# Copyright 2016--2024, Raphael Reitzig
#
# canonify_imgnames is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# canonify_imgnames is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with canonify_imgnames. If not, see <http://www.gnu.org/licenses/>.

# Depends on `exiftool`


require 'fileutils'

DEBUG = false unless Object.const_defined?(:DEBUG)
DRY_RUN = false unless Object.const_defined?(:DRY_RUN)

require_relative 'canonical_imgname'

renamed = 0
ARGV.each { |file|
  # Normalize so comparisons work out well later.
  file = full_filename(file, File.basename(file, File.extname(file)))

  if File.exist?(file) && !File.directory?(file)
    puts file if DEBUG

    new_name = canonical_image_name(file)

    if new_name.nil?
      puts " - No better name found, skipping.\n\n" if DEBUG
      next
    elsif file == full_filename(file, new_name)
      puts " - Already has good name, skipping.\n\n" if DEBUG
      next
    end

    # Resolve duplicates
    i = 1
    candidate = new_name
    while File.exist?(full_filename(file, candidate))
      puts " - '#{candidate}' already taken" if DEBUG
      candidate = "#{new_name} #{i.to_s}"
      i += 1
    end
    new_name = candidate

    # Finally, rename!
    puts " - Renaming to: #{full_filename(file, new_name)}" if DEBUG
    FileUtils::mv(file, full_filename(file, new_name)) unless DRY_RUN
    renamed += 1
  end
  puts "" if DEBUG
}
puts "Renamed #{renamed}, skipped #{ARGV.size - renamed}"