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# -*- coding: utf-8 -*-
# This file is part of beets.
# Copyright 2016, Philippe Mongeau.
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
"""Get a random song or album from the library.
"""
from __future__ import division, absolute_import, print_function
from beets.plugins import BeetsPlugin
from beets.ui import Subcommand, decargs, print_
import random
from operator import attrgetter
from itertools import groupby
def random_item(lib, opts, args):
query = decargs(args)
if opts.album:
objs = list(lib.albums(query))
else:
objs = list(lib.items(query))
if opts.equal_chance:
# Group the objects by artist so we can sample from them.
key = attrgetter('albumartist')
objs.sort(key=key)
objs_by_artists = {}
for artist, v in groupby(objs, key):
objs_by_artists[artist] = list(v)
objs = []
for _ in range(opts.number):
# Terminate early if we're out of objects to select.
if not objs_by_artists:
break
# Choose an artist and an object for that artist, removing
# this choice from the pool.
artist = random.choice(objs_by_artists.keys())
objs_from_artist = objs_by_artists[artist]
i = random.randint(0, len(objs_from_artist) - 1)
objs.append(objs_from_artist.pop(i))
# Remove the artist if we've used up all of its objects.
if not objs_from_artist:
del objs_by_artists[artist]
else:
number = min(len(objs), opts.number)
objs = random.sample(objs, number)
for item in objs:
print_(format(item))
random_cmd = Subcommand('random',
help=u'chose a random track or album')
random_cmd.parser.add_option(
u'-n', u'--number', action='store', type="int",
help=u'number of objects to choose', default=1)
random_cmd.parser.add_option(
u'-e', u'--equal-chance', action='store_true',
help=u'each artist has the same chance')
random_cmd.parser.add_all_common_options()
random_cmd.func = random_item
class Random(BeetsPlugin):
def commands(self):
return [random_cmd]
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