forked from rc/aircox
742 lines
24 KiB
Python
Executable File
742 lines
24 KiB
Python
Executable File
import os
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import shutil
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import logging
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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 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 date_or_default (date, date_only = 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 date_only:
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return date.replace(hour = 0, minute = 0, second = 0, microsecond = 0)
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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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)
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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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The podcasting and public access permissions of a Sound are managed through
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the related program info.
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"""
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Type = {
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'other': 0x00,
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'archive': 0x01,
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'excerpt': 0x02,
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}
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for key, value in Type.items():
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ugettext_lazy(key)
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type = models.SmallIntegerField(
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verbose_name = _('type'),
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choices = [ (y, x) for x,y in Type.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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)
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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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public = models.BooleanField(
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_('public'),
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default = False,
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help_text = _('sound\'s is accessible through the website')
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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 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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Frequency = {
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'first': (0b000001, _('first week of the month')),
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'second': (0b000010, _('second week of the month')),
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'third': (0b000100, _('third week of the month')),
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'fourth': (0b001000, _('fourth week of the month')),
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'last': (0b010000, _('last week of the month')),
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'first and third': (0b000101, _('first and third weeks of the month')),
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'second and fourth': (0b001010, _('second and fourth weeks of the month')),
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'every': (0b011111, _('every week')),
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'one on two': (0b100000, _('one week on two')),
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}
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VerboseFrequency = { value[0]: value[1] for key, value in Frequency.items() }
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Frequency = { key: value[0] for key, value in Frequency.items() }
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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 = VerboseFrequency.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 = '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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# FIXME: does not work if first_day > date_day
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date = date_or_default(date)
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if self.frequency == Schedule.Frequency['one on two']:
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week = date.isocalendar()[1]
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return (week % 2) == (self.date.isocalendar()[1] % 2)
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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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if not (date - self.date).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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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(date__in = dates,
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program = self.program)
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diffusions = []
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# existing diffusions
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for item in saved:
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if item.date in dates:
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dates.remove(item.date)
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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(date = 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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date = date,
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duration = self.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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class Station (Nameable):
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"""
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A Station regroup one or more programs (stream and normal), and is the top
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element used to generate streams outputs and configuration.
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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 = _('this station is 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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fallback = models.FilePathField(
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_('fallback song'),
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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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help_text = _('use this song file if there is a problem and nothing is '
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'played')
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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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station = models.ForeignKey(
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Station,
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verbose_name = _('station')
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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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@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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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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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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|
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@classmethod
|
|
def get_from_path (cl, path):
|
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"""
|
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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).
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"""
|
|
path = path.replace(settings.AIRCOX_PROGRAMS_DIR, '')
|
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while path[0] == '/': path = path[1:]
|
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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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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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Type = {
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'normal': 0x00, # diffusion is planified
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'unconfirmed': 0x01, # scheduled by the generator but not confirmed for diffusion
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'cancel': 0x02, # diffusion canceled
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}
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for key, value in Type.items():
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ugettext_lazy(key)
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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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sounds = models.ManyToManyField(
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Sound,
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blank = True,
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verbose_name = _('sounds'),
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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 = [ (y, x) for x,y in Type.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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date = models.DateTimeField( _('start of the diffusion') )
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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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def archives_duration (self):
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"""
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Get total duration of the archives. May differ from the schedule
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duration.
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"""
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sounds = self.initial.sounds if self.initial else self.sounds
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r = [ sound.duration
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for sound in sounds.filter(type = Sound.Type['archive'])
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if sound.duration ]
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return utils.time_sum(r) if r else self.duration
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def get_archives (self):
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"""
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Return an ordered list of archives sounds for the given episode.
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"""
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sounds = self.initial.sounds if self.initial else self.sounds
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r = [ sound for sound in sounds.all().order_by('path')
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if sound.type == Sound.Type['archive'] ]
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return r
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@classmethod
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def get_next (cl, station = None, date = None, **filter_args):
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"""
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Return a queryset with the upcoming diffusions, ordered by
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+date
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"""
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filter_args['date__gte'] = date_or_default(date)
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if station:
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filter_args['program__station'] = station
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return cl.objects.filter(**filter_args).order_by('date')
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@classmethod
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def get_prev (cl, station = None, date = None, **filter_args):
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"""
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Return a queryset with the previous diffusion, ordered by
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-date
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"""
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filter_args['date__lte'] = date_or_default(date)
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if station:
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filter_args['program__station'] = station
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return cl.objects.filter(**filter_args).order_by('-date')
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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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Note: for performance reason, check next and prev are limited to a
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certain amount of diffusions.
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"""
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r = []
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# prev
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qs = self.get_prev(self.program.station, self.date)
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count = 0
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for diff in qs:
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if diff.pk == self.pk:
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continue
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end = diff.date + utils.to_timedelta(diff.duration)
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if end > self.date:
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r.append(diff)
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continue
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count+=1
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if count > 5: break
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# next
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end = self.date + utils.to_timedelta(self.duration)
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qs = self.get_next(self.program.station, self.date)
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count = 0
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for diff in qs:
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if diff.pk == self.pk:
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continue
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if diff.date < end and diff not in r:
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r.append(diff)
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continue
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count+=1
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if count > 5: break
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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 '#' + str(self.pk) + ' ' + self.program.name + ', ' + \
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self.date.strftime('%Y-%m-%d %H:%M') +\
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'' # FIXME str(self.type_display)
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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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'\n - {}: #{}'.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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