Add calculating waittimes for playing/requesting songs.
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savepointradio/radio/utils.py
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45
savepointradio/radio/utils.py
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from datetime import timedelta
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from decimal import *
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from random import randint
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from django.db import models
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from django.utils import timezone
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from core.utils import get_setting
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from .models import Song
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# Set decimal precision
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getcontext().prec = 16
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def get_playlist_length():
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"""
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Total length of available songs in the playlist (in seconds).
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"""
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songs = Song.music.available()
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return songs.aggregate(models.Sum('length'))['length__sum']
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def get_waittime():
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"""
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Default length in seconds before a song can be played again. This is based
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on the replay ratio set in the application settings.
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"""
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waittime = get_playlist_length() * Decimal(get_setting('replay_ratio'))
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return waittime.quantize(Decimal('.01'), rounding=ROUND_UP)
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def get_next_allowed_play_time(song):
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"""
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Length of time in seconds before a song can be played again.
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"""
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if not song.last_played:
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return Decimal('0.00')
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waittime = get_waittime()
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nextplay = song.last_played + timedelta(seconds=float(waittime))
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current = (nextplay - timezone.now()).total_seconds()
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return Decimal(current if current > 0 else 0).quantize(Decimal('.01'),
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rounding=ROUND_UP)
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