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#!/usr/bin/env ruby
# XMMS2 - X Music Multiplexer System
# Copyright (C) 2003-2006 XMMS2 Team
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
# This library 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
# Lesser General Public License for more details.
# This file is a part of the XMMS2 client tutorial #4.
# For the purposes of this tutorial, the client will retrieve the current
# playlist and get mediainfo for each entry. If your favorite song is the only
# thing in your playlist, load everything from your favorite artist instead.
require 'xmmsclient'
begin
xmms = Xmms::Client.new('tutorial4').connect(ENV['XMMS_PATH'])
rescue Xmms::Client::ClientError
puts 'Failed to connect to XMMS2 daemon.'
puts 'Please make sure xmms2d is running and using the correct IPC path.'
exit
end
# Like the last tutorial, there will be a medialib_get_info call, but unlike
# tut3, this will get mediainfo for the list of all the IDs in the current
# playlist.
begin
# Another nice shortcut. The playlist_list method returns an Array of
# medialib IDs. The array is zero-indexed like any other, so keep this in
# mind, especially when displaying playlist positions to a user.
xmms.playlist.entries.wait.value.each_with_index do |id, index|
# After running the last tutorial, you saw there is really a lot of
# mediainfo for just one entry. So let's just print out the URL for
# each playlist entry here so the screen isn't flooded. Note that we
# don't need to specify the source for the propdict entry - there's
# only one URL anyway, set by the server, so masquerading the PropDict,
# we won't miss anything. By now you've probably noticed that all the
# PropDict keys are lowercase. This is just to make retrieval of values
# more uniform. (Having keys like :url and :URL would be confusing,
# no?)
# Remember to check for a ID of 0--it's invalid.
if(id.zero?)
puts "#{index + 1} Invalid ID!"
next
end
begin
# Remember, the playlist array is zero-indexed!
puts "#{index + 1}. #{xmms.medialib_get_info(id).wait.value.to_propdict[:url]}"
# It's possible that the URL isn't defined by the server, like if
# you added a non-media file to the playlist. You should keep that
# in mind when writing a client, but in this case PropDict#[:url]
# will only return a nil value, which just prints as an empty
# string.
rescue Xmms::Result::ValueError
puts "There was an error retrieving mediainfo for ID: #{id}."
end
end
rescue Xmms::Result::ValueError
puts 'There was an error retrieving mediainfo for a playlist entry.'
end
# This is the end of the synchronous clients. You've learned how to deal with
# XMMS2 both by commanding it and handling the data it returns. The next
# tutorial is nothing new in this regard; you will learn how to code
# asynchronously, which just means you will wait for results a bit differently.
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