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40 lines
1.3 KiB
Python
40 lines
1.3 KiB
Python
# Copyright 2015 Adafruit Industries.
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# Author: Tony DiCola
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# License: GNU GPLv2, see LICENSE.txt
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import random
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class Playlist(object):
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"""Representation of a playlist of movies."""
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def __init__(self, movies, is_random):
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"""Create a playlist from the provided list of movies."""
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self._movies = movies
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self._index = None
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self._is_random = is_random
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def get_next(self):
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"""Get the next movie in the playlist. Will loop to start of playlist
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after reaching end.
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"""
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# Check if no movies are in the playlist and return nothing.
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if len(self._movies) == 0:
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return None
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# Start Random movie
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if self._is_random:
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self._index = random.randrange(0, len(self._movies))
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else:
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# Start at the first movie and increment through them in order.
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if self._index is None:
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self._index = 0
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else:
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self._index += 1
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# Wrap around to the start after finishing.
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if self._index >= len(self._movies):
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self._index = 0
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return self._movies[self._index]
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def length(self):
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"""Return the number of movies in the playlist."""
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return len(self._movies)
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