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 #!/usr/bin/env ruby
 # SPDX-FileCopyrightText: 2019 Harald Sitter <sitter@kde.org>
 #
 # SPDX-License-Identifier: LGPL-2.0-only OR LGPL-3.0-only OR LicenseRef-KDE-Accepted-LGPL
 
 require 'ftpd'
 require 'logger'
 require 'tmpdir'
 
 STDOUT.sync = true
 
 # Monkey patch the site handler, it's not implemented so fake it a bit for ftp
 # worker purposes.
 
 # FIXME: and yet I seee kio_ftp(8319)/(kf5.kio.kio_ftp) Ftp::ftpChmod: ftpChmod: CHMOD not supported - disabling
 
 module Ftpd
   class CmdSite
     alias cmd_site_orig cmd_site
     def cmd_site(_argument)
       # We don't support chmod bugger off.
       reply '500 cmd_site.'
     end
   end
 end
 
 module Ftpd
   class CmdRest
     def cmd_rest(_argument)
       reply "350 cmd_rest."
     end
   end
 end
 
 module Ftpd
   class CmdStor
     alias cmd_stor_orig cmd_stor
     def cmd_stor(argument)
       if argument.include?('__badResume__')
         reply '550 out of quota'
       else
         cmd_stor_orig(argument)
       end
     end
   end
 end
 
 # Add some simulation capabilities to the file system
 class MangledDiskFileSystem < Ftpd::DiskFileSystem
   def accessible?(path, *args)
     return false if path.include?('__inaccessiblePath__')
 
     super(path, *args)
   end
 end
 
 class Driver
   def initialize(temp_dir)
     @temp_dir = temp_dir
   end
 
   def authenticate(_user, _password)
     true
   end
 
   def file_system(_user)
     MangledDiskFileSystem.new(@temp_dir)
   end
 end
 
 # NB: stderr is used to communicate with the parent!
 
 port = ARGV.fetch(0)
 temp_dir = ARGV.fetch(1)
 
 driver = Driver.new(temp_dir)
 server = Ftpd::FtpServer.new(driver)
 server.port = port
 server.log = Logger.new($stdout)
 server.start
 warn "port = #{server.bound_port}"
 puts "Server listening on port #{server.bound_port}"
 loop do
   sleep(1)
 end