forked from rc/aircox
736 lines
23 KiB
Python
Executable File
736 lines
23 KiB
Python
Executable File
import os
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import shutil
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import logging
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from enum import Enum, IntEnum
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from django.db import models
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from django.template.defaultfilters import slugify
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from django.utils.translation import ugettext as _, ugettext_lazy
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from django.utils import timezone as tz
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from django.utils.html import strip_tags
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from django.contrib.contenttypes.fields import GenericForeignKey
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from django.contrib.contenttypes.models import ContentType
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from django.conf import settings as main_settings
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from taggit.managers import TaggableManager
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import aircox.programs.utils as utils
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import aircox.programs.settings as settings
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logger = logging.getLogger('aircox.core')
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def as_date(date, as_datetime = True):
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"""
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If as_datetime, return the date with time info set to 0; else, return
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a date with date informations of the given date/time.
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"""
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import datetime
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if as_datetime:
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return date.replace(hour = 0, minute = 0, second = 0, microsecond = 0)
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return datetime.date(date.year, date.month, date.day)
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def date_or_default(date, no_time = False):
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"""
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Return date or default value (now) if not defined, and remove time info
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if date_only is True
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"""
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date = date or tz.datetime.today()
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if not tz.is_aware(date):
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date = tz.make_aware(date)
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if no_time:
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return as_date(date)
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return date
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class Nameable(models.Model):
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name = models.CharField (
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_('name'),
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max_length = 128,
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)
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@property
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def slug(self):
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"""
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Slug based on the name. We replace '-' by '_'
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"""
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return slugify(self.name).replace('-', '_')
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def __str__(self):
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#if self.pk:
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# return '#{} {}'.format(self.pk, self.name)
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return '{}'.format(self.name)
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class Meta:
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abstract = True
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class Track(Nameable):
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"""
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Track of a playlist of a diffusion. The position can either be expressed
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as the position in the playlist or as the moment in seconds it started.
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"""
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# There are no nice solution for M2M relations ship (even without
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# through) in django-admin. So we unfortunately need to make one-
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# to-one relations and add a position argument
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diffusion = models.ForeignKey(
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'Diffusion',
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)
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artist = models.CharField(
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_('artist'),
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max_length = 128,
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)
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# position can be used to specify a position in seconds for non-
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# stop programs or a position in the playlist
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position = models.SmallIntegerField(
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default = 0,
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help_text=_('position in the playlist'),
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)
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tags = TaggableManager(
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verbose_name=_('tags'),
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blank=True,
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)
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def __str__(self):
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return ' '.join([self.artist, ':', self.name ])
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class Meta:
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verbose_name = _('Track')
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verbose_name_plural = _('Tracks')
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class Sound(Nameable):
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"""
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A Sound is the representation of a sound file that can be either an excerpt
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or a complete archive of the related diffusion.
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"""
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class Type(IntEnum):
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other = 0x00,
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archive = 0x01,
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excerpt = 0x02,
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diffusion = models.ForeignKey(
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'Diffusion',
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verbose_name = _('diffusion'),
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blank = True, null = True,
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)
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type = models.SmallIntegerField(
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verbose_name = _('type'),
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choices = [ (int(y), _(x)) for x,y in Type.__members__.items() ],
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blank = True, null = True
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)
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path = models.FilePathField(
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_('file'),
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path = settings.AIRCOX_PROGRAMS_DIR,
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match = r'(' + '|'.join(settings.AIRCOX_SOUND_FILE_EXT) \
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.replace('.', r'\.') + ')$',
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recursive = True,
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blank = True, null = True,
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max_length = 256
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)
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embed = models.TextField(
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_('embed HTML code'),
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blank = True, null = True,
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help_text = _('HTML code used to embed a sound from external plateform'),
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)
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duration = models.TimeField(
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_('duration'),
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blank = True, null = True,
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help_text = _('duration of the sound'),
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)
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mtime = models.DateTimeField(
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_('modification time'),
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blank = True, null = True,
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help_text = _('last modification date and time'),
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)
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removed = models.BooleanField(
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_('removed'),
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default = False,
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help_text = _('this sound has been removed from filesystem'),
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)
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good_quality = models.BooleanField(
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_('good quality'),
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default = False,
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help_text = _('sound\'s quality is okay')
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)
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def get_mtime(self):
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"""
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Get the last modification date from file
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"""
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mtime = os.stat(self.path).st_mtime
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mtime = tz.datetime.fromtimestamp(mtime)
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# db does not store microseconds
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mtime = mtime.replace(microsecond = 0)
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return tz.make_aware(mtime, tz.get_current_timezone())
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def url(self):
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"""
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Return an url to the stream
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"""
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# path = self._meta.get_field('path').path
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path = self.path.replace(main_settings.MEDIA_ROOT, '', 1)
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#path = self.path.replace(path, '', 1)
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return path
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def file_exists(self):
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"""
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Return true if the file still exists
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"""
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return os.path.exists(self.path)
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def check_on_file(self):
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"""
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Check sound file info again'st self, and update informations if
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needed (do not save). Return True if there was changes.
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"""
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if not self.file_exists():
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if self.removed:
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return
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logger.info('sound %s: has been removed', self.path)
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self.removed = True
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return True
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old_removed = self.removed
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self.removed = False
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mtime = self.get_mtime()
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if self.mtime != mtime:
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self.mtime = mtime
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self.good_quality = False
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logger.info('sound %s: m_time has changed. Reset quality info',
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self.path)
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return True
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return old_removed != self.removed
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def save(self, check = True, *args, **kwargs):
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if check:
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self.check_on_file()
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if not self.name and self.path:
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self.name = os.path.basename(self.path)
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self.name = os.path.splitext(self.name)[0]
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self.name = self.name.replace('_', ' ')
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super().save(*args, **kwargs)
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def __str__(self):
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return '/'.join(self.path.split('/')[-3:])
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class Meta:
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verbose_name = _('Sound')
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verbose_name_plural = _('Sounds')
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class Stream(models.Model):
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"""
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When there are no program scheduled, it is possible to play sounds
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in order to avoid blanks. A Stream is a Program that plays this role,
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and whose linked to a Stream.
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All sounds that are marked as good and that are under the related
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program's archive dir are elligible for the sound's selection.
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"""
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program = models.ForeignKey(
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'Program',
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verbose_name = _('related program'),
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)
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delay = models.TimeField(
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_('delay'),
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blank = True, null = True,
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help_text = _('delay between two sound plays')
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)
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begin = models.TimeField(
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_('begin'),
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blank = True, null = True,
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help_text = _('used to define a time range this stream is'
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'played')
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)
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end = models.TimeField(
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_('end'),
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blank = True, null = True,
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help_text = _('used to define a time range this stream is'
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'played')
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)
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class Schedule(models.Model):
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"""
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A Schedule defines time slots of programs' diffusions. It can be an initial
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run or a rerun (in such case it is linked to the related schedule).
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"""
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# Frequency for schedules. Basically, it is a mask of bits where each bit is
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# a week. Bits > rank 5 are used for special schedules.
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# Important: the first week is always the first week where the weekday of
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# the schedule is present.
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# For ponctual programs, there is no need for a schedule, only a diffusion
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class Frequency(IntEnum):
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first = 0b000001
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second = 0b000010
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third = 0b000100
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fourth = 0b001000
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last = 0b010000
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first_and_third = 0b000101
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second_and_fourth = 0b001010
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every = 0b011111
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one_on_two = 0b100000
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program = models.ForeignKey(
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'Program',
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verbose_name = _('related program'),
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)
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date = models.DateTimeField(_('date'))
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duration = models.TimeField(
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_('duration'),
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help_text = _('regular duration'),
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)
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frequency = models.SmallIntegerField(
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_('frequency'),
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choices = [
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(int(y), {
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'first': _('first week of the month'),
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'second': _('second week of the month'),
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'third': _('third week of the month'),
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'fourth': _('fourth week of the month'),
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'last': _('last week of the month'),
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'first_and_third': _('first and third weeks of the month'),
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'second_and_fourth': _('second and fourth weeks of the month'),
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'every': _('every week'),
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'one_on_two': _('one week on two'),
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}[x]) for x,y in Frequency.__members__.items()
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],
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)
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initial = models.ForeignKey(
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'self',
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verbose_name = _('initial'),
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blank = True, null = True,
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help_text = 'this schedule is a rerun of this one',
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)
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def match(self, date = None, check_time = True):
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"""
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Return True if the given datetime matches the schedule
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"""
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date = date_or_default(date)
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if self.date.weekday() == date.weekday() and self.match_week(date):
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return self.date.time() == date.time() if check_time else True
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return False
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def match_week(self, date = None):
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"""
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Return True if the given week number matches the schedule, False
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otherwise.
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If the schedule is ponctual, return None.
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"""
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# since we care only about the week, go to the same day of the week
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date = date_or_default(date)
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date += tz.timedelta(days = self.date.weekday() - date.weekday() )
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if self.frequency == Schedule.Frequency.one_on_two:
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# cf notes in date_of_month
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diff = as_date(date, False) - as_date(self.date, False)
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return not (diff.days % 14)
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first_of_month = date.replace(day = 1)
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week = date.isocalendar()[1] - first_of_month.isocalendar()[1]
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# weeks of month
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if week == 4:
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# fifth week: return if for every week
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return self.frequency == 0b1111
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return (self.frequency & (0b0001 << week) > 0)
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def normalize(self, date):
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"""
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Set the time of a datetime to the schedule's one
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"""
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return date.replace(hour = self.date.hour, minute = self.date.minute)
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def dates_of_month(self, date = None):
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"""
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Return a list with all matching dates of date.month (=today)
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"""
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date = date_or_default(date, True).replace(day=1)
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freq = self.frequency
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# move to the first day of the month that matches the schedule's weekday
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# check on SO#3284452 for the formula
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first_weekday = date.weekday()
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sched_weekday = self.date.weekday()
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date += tz.timedelta(days = (7 if first_weekday > sched_weekday else 0) \
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- first_weekday + sched_weekday)
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month = date.month
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# last of the month
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if freq == Schedule.Frequency.last:
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date += tz.timedelta(days = 4 * 7)
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next_date = date + tz.timedelta(days = 7)
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if next_date.month == month:
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date = next_date
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return [self.normalize(date)]
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dates = []
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if freq == Schedule.Frequency.one_on_two:
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# NOTE previous algorithm was based on the week number, but this
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# approach is wrong because number of weeks in a year can be
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# 52 or 53. This also clashes with the first week of the year.
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diff = as_date(date, False) - as_date(self.date, False)
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if diff.days % 14:
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date += tz.timedelta(days = 7)
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while date.month == month:
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dates.append(date)
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date += tz.timedelta(days = 14)
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else:
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week = 0
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while week < 5 and date.month == month:
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if freq & (0b1 << week):
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dates.append(date)
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date += tz.timedelta(days = 7)
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week += 1;
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return [self.normalize(date) for date in dates]
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def diffusions_of_month(self, date, exclude_saved = False):
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"""
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Return a list of Diffusion instances, from month of the given date, that
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can be not in the database.
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If exclude_saved, exclude all diffusions that are yet in the database.
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"""
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dates = self.dates_of_month(date)
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saved = Diffusion.objects.filter(start__in = dates,
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program = self.program)
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diffusions = []
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duration = utils.to_timedelta(self.duration)
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# existing diffusions
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for item in saved:
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if item.start in dates:
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dates.remove(item.start)
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if not exclude_saved:
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diffusions.append(item)
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# others
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for date in dates:
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first_date = date
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if self.initial:
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first_date -= self.date - self.initial.date
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first_diffusion = Diffusion.objects.filter(start = first_date,
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program = self.program)
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first_diffusion = first_diffusion[0] if first_diffusion.count() \
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else None
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diffusions.append(Diffusion(
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program = self.program,
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type = Diffusion.Type.unconfirmed,
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initial = first_diffusion if self.initial else None,
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start = date,
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end = date + duration,
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))
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return diffusions
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def __str__(self):
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return ' | '.join([ '#' + str(self.id), self.program.name,
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self.get_frequency_display(),
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self.date.strftime('%a %H:%M') ])
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def save(self, *args, **kwargs):
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if self.initial:
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self.program = self.initial.program
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self.duration = self.initial.duration
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self.frequency = self.initial.frequency
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super().save(*args, **kwargs)
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class Meta:
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verbose_name = _('Schedule')
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verbose_name_plural = _('Schedules')
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|
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class Program(Nameable):
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"""
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A Program can either be a Streamed or a Scheduled program.
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A Streamed program is used to generate non-stop random playlists when there
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is not scheduled diffusion. In such a case, a Stream is used to describe
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diffusion informations.
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A Scheduled program has a schedule and is the one with a normal use case.
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Renaming a Program rename the corresponding directory to matches the new
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name if it does not exists.
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"""
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active = models.BooleanField(
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_('active'),
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default = True,
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help_text = _('if not set this program is no longer active')
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)
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public = models.BooleanField(
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_('public'),
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default = True,
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help_text = _('information are available to the public')
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)
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|
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@property
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def path(self):
|
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"""
|
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Return the path to the programs directory
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"""
|
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return os.path.join(settings.AIRCOX_PROGRAMS_DIR,
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self.slug + '_' + str(self.id) )
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|
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def ensure_dir(self, subdir = None):
|
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"""
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Make sur the program's dir exists (and optionally subdir). Return True
|
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if the dir (or subdir) exists.
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"""
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path = os.path.join(self.path, subdir) if subdir else \
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self.path
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os.makedirs(path, exist_ok = True)
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return os.path.exists(path)
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|
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def find_schedule(self, date):
|
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"""
|
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Return the first schedule that matches a given date.
|
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"""
|
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schedules = Schedule.objects.filter(program = self)
|
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for schedule in schedules:
|
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if schedule.match(date, check_time = False):
|
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return schedule
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|
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def __init__(self, *kargs, **kwargs):
|
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super().__init__(*kargs, **kwargs)
|
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if self.name:
|
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self.__original_path = self.path
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|
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def save(self, *kargs, **kwargs):
|
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super().save(*kargs, **kwargs)
|
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if hasattr(self, '__original_path') and \
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self.__original_path != self.path and \
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os.path.exists(self.__original_path) and \
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not os.path.exists(self.path):
|
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logger.info('program #%s\'s name changed to %s. Change dir name',
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self.id, self.name)
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shutil.move(self.__original_path, self.path)
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|
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sounds = Sounds.objects.filter(path__startswith = self.__original_path)
|
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for sound in sounds:
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sound.path.replace(self.__original_path, self.path)
|
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sound.save()
|
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|
|
@classmethod
|
|
def get_from_path(cl, path):
|
|
"""
|
|
Return a Program from the given path. We assume the path has been
|
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given in a previous time by this model (Program.path getter).
|
|
"""
|
|
path = path.replace(settings.AIRCOX_PROGRAMS_DIR, '')
|
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while path[0] == '/': path = path[1:]
|
|
while path[-1] == '/': path = path[:-2]
|
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if '/' in path:
|
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path = path[:path.index('/')]
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|
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path = path.split('_')
|
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path = path[-1]
|
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qs = cl.objects.filter(id = int(path))
|
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return qs[0] if qs else None
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class Diffusion(models.Model):
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"""
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A Diffusion is an occurrence of a Program that is scheduled on the
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station's timetable. It can be a rerun of a previous diffusion. In such
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a case, use rerun's info instead of its own.
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A Diffusion without any rerun is named Episode (previously, a
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Diffusion was different from an Episode, but in the end, an
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episode only has a name, a linked program, and a list of sounds, so we
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finally merge theme).
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A Diffusion can have different types:
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- default: simple diffusion that is planified / did occurred
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- unconfirmed: a generated diffusion that has not been confirmed and thus
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is not yet planified
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- cancel: the diffusion has been canceled
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- stop: the diffusion has been manually stopped
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"""
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class Type(IntEnum):
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normal = 0x00
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unconfirmed = 0x01
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canceled = 0x02
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# common
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program = models.ForeignKey (
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'Program',
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verbose_name = _('program'),
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)
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# specific
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type = models.SmallIntegerField(
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verbose_name = _('type'),
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choices = [ (int(y), _(x)) for x,y in Type.__members__.items() ],
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)
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initial = models.ForeignKey (
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'self',
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verbose_name = _('initial'),
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blank = True, null = True,
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help_text = _('the diffusion is a rerun of this one')
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)
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start = models.DateTimeField( _('start of the diffusion') )
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end = models.DateTimeField( _('end of the diffusion') )
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@property
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def duration(self):
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return self.end - self.start
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@property
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def date(self):
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return self.start
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@property
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def playlist(self):
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"""
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List of archives' path; uses get_archives
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"""
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return [ sound.path for sound in self.get_archives() ]
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def get_archives(self):
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"""
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Return a list of available archives sounds for the given episode,
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ordered by path.
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"""
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sounds = self.initial.sound_set if self.initial else self.sound_set
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return sounds.filter(type = Sound.Type.archive, removed = False). \
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order_by('path')
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@classmethod
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def get(cl, date = None,
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now = False, next = False, prev = False,
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queryset = None,
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**filter_args):
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"""
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Return a queryset of diffusions, depending on value of now/next/prev
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- now: that have date in their start-end range or start after
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- next: that start after date
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- prev: that end before date
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If queryset is not given, use self.objects.all
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Diffusions are ordered by +start for now and next; -start for prev
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"""
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#FIXME: conflicts? ( + calling functions)
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date = date_or_default(date)
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if queryset is None:
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queryset = cl.objects
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if now:
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return queryset.filter(
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models.Q(start__lte = date,
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end__gte = date) |
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models.Q(start__gte = date),
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**filter_args
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).order_by('start')
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if next:
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return queryset.filter(
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start__gte = date,
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**filter_args
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).order_by('start')
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if prev:
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return queryset.filter(
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end__lte = date,
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**filter_args
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).order_by('-start')
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def is_date_in_my_range(self, date = None):
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"""
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Return true if the given date is in the diffusion's start-end
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range.
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"""
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return self.start < date_or_default(date) < self.end
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def get_conflicts(self):
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"""
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Return a list of conflictual diffusions, based on the scheduled duration.
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"""
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r = Diffusion.objects.filter(
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models.Q(start__lt = self.start,
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end__gt = self.start) |
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models.Q(start__gt = self.start,
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start__lt = self.end)
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)
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return r
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def save(self, *args, **kwargs):
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if self.initial:
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# force link to the top initial diffusion
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if self.initial.initial:
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self.initial = self.initial.initial
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self.program = self.initial.program
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super().save(*args, **kwargs)
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def __str__(self):
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return '{self.program.name} {date} #{self.pk}'.format(
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self=self, date=self.date.strftime('%Y-%m-%d %H:%M')
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)
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class Meta:
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verbose_name = _('Diffusion')
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verbose_name_plural = _('Diffusions')
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permissions = (
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('programming', _('edit the diffusion\'s planification')),
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)
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class Log(models.Model):
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"""
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Log a played sound start and stop, or a single message
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"""
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source = models.CharField(
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_('source'),
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max_length = 64,
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help_text = 'source information',
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blank = True, null = True,
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)
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date = models.DateTimeField(
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'date',
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auto_now_add=True,
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)
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comment = models.CharField(
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max_length = 512,
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blank = True, null = True,
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)
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related_type = models.ForeignKey(
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ContentType,
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blank = True, null = True,
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)
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related_id = models.PositiveIntegerField(
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blank = True, null = True,
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)
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related_object = GenericForeignKey(
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'related_type', 'related_id',
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)
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@classmethod
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def get_for_related_model(cl, model):
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"""
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Return a queryset that filter related_type to the given one.
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"""
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return cl.objects.filter(related_type__pk =
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ContentType.objects.get_for_model(model).id)
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def print(self):
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logger.info('log #%s: %s%s',
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str(self),
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self.comment or '',
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' -- {} #{}'.format(self.related_type, self.related_id)
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if self.related_object else ''
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)
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def __str__(self):
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return '#{} ({}, {})'.format(
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self.id, self.date.strftime('%Y-%m-%d %H:%M'), self.source
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)
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