emissions/models.py

   1 import datetime
   2 import os
   3
   4 from django.conf import settings
   5 from django.core.exceptions import ObjectDoesNotExist
   6 from django.forms import fields
   7 from django.core.urlresolvers import reverse
   8
   9 from django.db import models
  10 from django.utils.encoding import python_2_unicode_compatible
  11 from django.utils.translation import ugettext
  12 from django.utils.translation import ugettext_lazy as _
  13
  14 from django.db.models.signals import pre_save, post_delete
  15 from django.dispatch.dispatcher import receiver
  16
  17 from ckeditor.fields import RichTextField
  18 from taggit.managers import TaggableManager
  19
  20 from .utils import maybe_resize, get_duration
  21
  22
  23 LICENSES = (
  24     ('', _('Unspecified')),
  25     ('cc by', _('Creative Commons Attribution')),
  26     ('cc by-sa', _('Creative Commons Attribution ShareAlike')),
  27     ('cc by-nc', _('Creative Commons Attribution NonCommercial')),
  28     ('cc by-nd', _('Creative Commons Attribution NoDerivs')),
  29     ('cc by-nc-sa', _('Creative Commons Attribution NonCommercial ShareAlike')),
  30     ('cc by-nc-nd', _('Creative Commons Attribution NonCommercial NoDerivs')),
  31     ('cc0 / pd', _('Creative Commons Zero / Public Domain')),
  32     ('artlibre', _('Art Libre')),
  33 )
  34
  35 PODCAST_SOUND_QUALITY_LIST = (
  36     ('standard', _('Standard')),
  37     ('high', _('High')),
  38     ('highest', _('Highest')),
  39 )
  40
  41
  42 class WeekdayMixin(object):
  43     DAY_HOUR_START = 5
  44
  45     def get_weekday(self):
  46         weekday = self.datetime.weekday() + 7
  47         if self.datetime.time() < datetime.time(self.DAY_HOUR_START, 0):
  48             weekday -= 1
  49         weekday %= 7
  50         return weekday
  51
  52     def is_on_weekday(self, day): # day is [1..7]
  53         week_day = self.datetime.weekday()
  54         if self.datetime.hour < self.DAY_HOUR_START:
  55             week_day -= 1
  56         week_day = (week_day % 7) + 1
  57         return week_day == day
  58
  59
  60 @python_2_unicode_compatible
  61 class Category(models.Model):
  62
  63     class Meta:
  64         verbose_name = _('Category')
  65         verbose_name_plural = _('Categories')
  66         ordering = ['title']
  67
  68     title = models.CharField(_('Title'), max_length=50)
  69     slug = models.SlugField(null=True)
  70     itunes_category = models.CharField(_('iTunes Category Name'), max_length=100, null=True)
  71
  72     def sorted_emission(self):
  73         return self.emission_set.order_by('title')
  74
  75     def __str__(self):
  76         return self.title
  77
  78
  79 @python_2_unicode_compatible
  80 class Colour(models.Model):
  81
  82     class Meta:
  83         verbose_name = _('Colour')
  84         verbose_name_plural = _('Colours')
  85         ordering = ['title']
  86
  87     title = models.CharField(_('Title'), max_length=50)
  88     slug = models.SlugField(null=True)
  89
  90     def sorted_emission(self):
  91         return self.emission_set.order_by('title')
  92
  93     def __str__(self):
  94         return self.title
  95
  96
  97 @python_2_unicode_compatible
  98 class Format(models.Model):
  99
 100     class Meta:
 101         verbose_name = _('Format')
 102         verbose_name_plural = _('Formats')
 103         ordering = ['title']
 104
 105     title = models.CharField(_('Title'), max_length=50)
 106     slug = models.SlugField(null=True)
 107
 108     def __str__(self):
 109         return self.title
 110
 111
 112 def get_emission_image_path(instance, filename):
 113     return os.path.join('images', instance.slug,
 114             os.path.basename(filename))
 115
 116
 117 @python_2_unicode_compatible
 118 class Emission(models.Model):
 119
 120     class Meta:
 121         verbose_name = _('Emission')
 122         verbose_name_plural = _('Emissions')
 123         ordering = ['title']
 124
 125     title = models.CharField(_('Title'), max_length=200)
 126     slug = models.SlugField(max_length=200)
 127     subtitle = models.CharField(_('Subtitle'), max_length=80, null=True, blank=True)
 128     text = RichTextField(_('Description'), null=True)
 129     archived = models.BooleanField(_('Archived'), default=False)
 130     categories = models.ManyToManyField(Category, verbose_name=_('Categories'), blank=True)
 131     colours = models.ManyToManyField(Colour, verbose_name=_('Colours'), blank=True)
 132
 133     # XXX: languages (models.ManyToManyField(Language))
 134
 135     duration = models.IntegerField(_('Duration'), default=60,
 136             help_text=_('In minutes'))
 137
 138     default_license = models.CharField(_('Default license for podcasts'),
 139             max_length=20, blank=True, default='', choices=LICENSES)
 140     podcast_sound_quality = models.CharField(_('Podcast sound quality'),
 141             max_length=20, default='standard', choices=PODCAST_SOUND_QUALITY_LIST)
 142     email = models.EmailField(_('Email'), max_length=254, null=True, blank=True)
 143     website = models.URLField(_('Website'), null=True, blank=True)
 144
 145     image = models.ImageField(_('Image'),
 146             upload_to=get_emission_image_path, max_length=250, null=True, blank=True)
 147
 148     chat_open = models.DateTimeField(null=True, blank=True)
 149
 150     # denormalized from Focus
 151     got_focus = models.DateTimeField(default=None, null=True, blank=True)
 152     has_focus = models.BooleanField(default=False)
 153
 154     creation_timestamp = models.DateTimeField(auto_now_add=True, null=True)
 155     last_update_timestamp = models.DateTimeField(auto_now=True, null=True)
 156
 157     def get_absolute_url(self):
 158         return reverse('emission-view', kwargs={'slug': str(self.slug)})
 159
 160     def __str__(self):
 161         return self.title
 162
 163     def save(self, *args, **kwargs):
 164         super(Emission, self).save(*args, **kwargs)
 165         if self.id is not None and self.image:
 166             maybe_resize(self.image.path)
 167
 168     def get_absolute_url(self):
 169         return reverse('emission-view',
 170                         kwargs={'slug':  str(self.slug)})
 171
 172     def get_schedules(self):
 173         return Schedule.objects.filter(emission=self).order_by('datetime')
 174
 175     def get_sorted_episodes(self):
 176         return self.episode_set.select_related().extra(select={
 177                 'first_diffusion': 'emissions_diffusion.datetime',
 178                 },
 179                 select_params=(False, True),
 180                 where=['''datetime = (SELECT MIN(datetime)
 181                                         FROM emissions_diffusion
 182                                        WHERE episode_id = emissions_episode.id)'''],
 183                 tables=['emissions_diffusion'],
 184             ).order_by('-first_diffusion')
 185
 186     def get_sorted_newsitems(self):
 187         return self.newsitem_set.select_related().order_by('-date')
 188
 189     def get_next_planned_date_and_schedule(self, since=None):
 190         schedules = self.schedule_set.filter(rerun=False)
 191         if not schedules:
 192             return None
 193         if since is None:
 194             since = datetime.datetime.today()
 195         possible_dates = []
 196         for schedule in schedules:
 197             possible_dates.append((schedule.get_next_planned_date(since), schedule))
 198         possible_dates.sort(key=lambda x: x[0])
 199         return possible_dates[0]
 200
 201     def get_next_planned_date(self, since=None):
 202         result = self.get_next_planned_date_and_schedule(since=since)
 203         return result[0] if result else None
 204
 205     def get_next_planned_duration(self, since=None):
 206         result = self.get_next_planned_date_and_schedule(since=since)
 207         if not result:
 208             return None
 209         return result[1].duration or self.duration
 210
 211 @python_2_unicode_compatible
 212 class Schedule(models.Model, WeekdayMixin):
 213
 214     class Meta:
 215         verbose_name = _('Schedule')
 216         verbose_name_plural = _('Schedules')
 217         ordering = ['datetime']
 218
 219     WEEK_CHOICES = (
 220         (0b1111, _('Every week')),
 221         (0b0001, _('First week')),
 222         (0b0010, _('Second week')),
 223         (0b0100, _('Third week')),
 224         (0b1000, _('Fourth week')),
 225         (0b0101, _('First and third week')),
 226         (0b1010, _('Second and fourth week'))
 227     )
 228     emission = models.ForeignKey('Emission', verbose_name=u'Emission')
 229     datetime = models.DateTimeField()
 230     weeks = models.IntegerField(_('Weeks'), default=15, choices=WEEK_CHOICES)
 231     rerun = models.BooleanField(_('Rerun'), default=False)
 232     duration = models.IntegerField(_('Duration'), null=True, blank=True,
 233             help_text=_('In minutes'))
 234
 235     @property
 236     def weeks_string(self):
 237         if self.weeks == 0b0001:
 238             return ugettext('1st of the month')
 239         elif self.weeks == 0b0010:
 240             return ugettext('2nd of the month')
 241         elif self.weeks == 0b0100:
 242             return ugettext('3rd of the month')
 243         elif self.weeks == 0b1000:
 244             return ugettext('4th of the month')
 245         elif self.weeks == 0b0101:
 246             return ugettext('1st and 3rd')
 247         elif self.weeks == 0b1010:
 248             return ugettext('2nd and 4th')
 249         return None
 250
 251     def week_sort_key(self):
 252         order = [
 253             0b1111, # Every week
 254             0b0001, # First week
 255             0b0101, # First and third week
 256             0b0010, # Second week
 257             0b1010, # Second and fourth week
 258             0b0100, # Third week
 259             0b1000, # Fourth week
 260         ]
 261         if self.weeks in order:
 262             return order.index(self.weeks)
 263         return -1
 264
 265     def get_duration(self):
 266         if self.duration:
 267             return self.duration
 268         else:
 269             return self.emission.duration
 270
 271     @property
 272     def end_datetime(self):
 273         return self.datetime + datetime.timedelta(minutes=self.get_duration())
 274
 275     def match_week(self, week_no):
 276         if week_no == 4:
 277             # this is the fifth week of the month, only return True for
 278             # emissions scheduled every week.
 279             return (self.weeks == 0b1111)
 280         if (self.weeks & (0b0001<<(week_no)) == 0):
 281             return False
 282         return True
 283
 284     def matches(self, dt):
 285         weekday = dt.weekday()
 286         if dt.hour < self.DAY_HOUR_START:
 287             weekday -= 1
 288         if weekday != self.get_weekday():
 289             return False
 290         if self.weeks != 0b1111:
 291             week_no = (dt.day-1) // 7
 292             if self.match_week(week_no) is False:
 293                 return False
 294         if dt.time() >= self.datetime.time() and \
 295                 dt.time() <= (self.datetime + datetime.timedelta(minutes=self.get_duration())).time():
 296             return True
 297         return False
 298
 299     def get_next_planned_date(self, since):
 300         possible_dates = []
 301         monday_since_date = since - datetime.timedelta(days=since.weekday())
 302         start_week_date = self.datetime.replace(
 303                 year=monday_since_date.year,
 304                 month=monday_since_date.month,
 305                 day=monday_since_date.day)
 306         start_week_date -= datetime.timedelta(days=start_week_date.weekday())
 307         start_week_date += datetime.timedelta(days=self.datetime.weekday())
 308         for i in range(6):
 309             week_date = start_week_date + datetime.timedelta(days=i*7)
 310             if week_date < since:
 311                 continue
 312             if self.match_week((week_date.day-1)//7):
 313                 possible_dates.append(week_date)
 314         possible_dates.sort()
 315         return possible_dates[0]
 316
 317
 318     def __str__(self):
 319         return u'%s at %s' % (self.emission.title,
 320                 self.datetime.strftime('%a %H:%M'))
 321
 322
 323 def get_episode_image_path(instance, filename):
 324     return os.path.join('images', instance.emission.slug,
 325             os.path.basename(filename))
 326
 327
 328 @python_2_unicode_compatible
 329 class Episode(models.Model):
 330
 331     class Meta:
 332         verbose_name = _('Episode')
 333         verbose_name_plural = _('Episodes')
 334         ordering = ['title']
 335
 336     emission = models.ForeignKey('Emission', verbose_name=_('Emission'))
 337     title = models.CharField(_('Title'), max_length=200)
 338     slug = models.SlugField(max_length=200)
 339     subtitle = models.CharField(_('Subtitle'), max_length=150, null=True, blank=True)
 340     text = RichTextField(_('Description'), null=True)
 341     tags = TaggableManager(_('Tags'), blank=True)
 342     duration = models.IntegerField(_('Duration'), null=True, blank=True,
 343             help_text=_('In minutes'))
 344
 345     image = models.ImageField(_('Image'),
 346             upload_to=get_episode_image_path, max_length=250, null=True, blank=True)
 347
 348     effective_start = models.DateTimeField(null=True, blank=True)
 349     effective_end = models.DateTimeField(null=True, blank=True)
 350
 351     # denormalized from Focus
 352     got_focus = models.DateTimeField(default=None, null=True, blank=True)
 353     has_focus = models.BooleanField(default=False)
 354
 355     creation_timestamp = models.DateTimeField(auto_now_add=True, null=True)
 356     last_update_timestamp = models.DateTimeField(auto_now=True, null=True)
 357
 358     # XXX: languages (models.ManyToManyField(Language))
 359
 360     def __str__(self):
 361         return self.title
 362
 363     def save(self, *args, **kwargs):
 364         super(Episode, self).save(*args, **kwargs)
 365         if self.id is not None and self.image:
 366             maybe_resize(self.image.path)
 367
 368     def get_duration(self):
 369         if self.duration:
 370             return self.duration
 371         else:
 372             return self.emission.duration
 373
 374     def get_absolute_url(self):
 375         return reverse('episode-view',
 376                         kwargs={'emission_slug': str(self.emission.slug),
 377                                 'slug':  str(self.slug)})
 378
 379     def has_sound(self):
 380         return (self.soundfile_set.count() > 0)
 381
 382     def get_pige_download_url(self):
 383         return '%s/%s-%s-%s.wav' % (
 384                 settings.PIGE_DOWNLOAD_BASE_URL,
 385                 self.effective_start.strftime('%Y%m%d'),
 386                 self.effective_start.strftime('%Hh%Mm%S.%f'),
 387                 self.effective_end.strftime('%Hh%Mm%S.%f'))
 388
 389     _soundfiles = {}
 390
 391     @classmethod
 392     def set_prefetched_soundfiles(cls, soundfiles):
 393         cls._soundfiles.update(soundfiles)
 394
 395     def has_prefetched_soundfile(self):
 396         return self.id in self._soundfiles
 397
 398     def get_prefetched_soundfile(self):
 399         return self._soundfiles.get(self.id)
 400
 401     _main_sound = False
 402
 403     @property
 404     def main_sound(self):
 405         if self._main_sound is not False:
 406             return self._main_sound
 407
 408         if self.has_prefetched_soundfile():
 409             self._main_sound = self.get_prefetched_soundfile()
 410             return self._main_sound
 411
 412         t = self.soundfile_set.exclude(podcastable=False).exclude(fragment=True)
 413         if t:
 414             self._main_sound = t[0]
 415         else:
 416             self._main_sound = None
 417
 418         return self._main_sound
 419
 420     @main_sound.setter
 421     def main_sound(self, value):
 422         self._main_sound = value
 423
 424     def fragment_sounds(self):
 425         return self.soundfile_set.exclude(podcastable=False).exclude(fragment=False)
 426
 427     def diffusions(self):
 428         return Diffusion.objects.filter(episode=self.id).order_by('datetime')
 429
 430
 431 @python_2_unicode_compatible
 432 class Diffusion(models.Model, WeekdayMixin):
 433
 434     class Meta:
 435         verbose_name = _('Diffusion')
 436         verbose_name_plural = _('Diffusions')
 437         ordering = ['datetime']
 438
 439     episode = models.ForeignKey('Episode', verbose_name=_('Episode'))
 440     datetime = models.DateTimeField(_('Date/time'), db_index=True)
 441
 442     def __str__(self):
 443         return u'%s at %02d:%02d' % (self.episode.title, self.datetime.hour,
 444                 self.datetime.minute)
 445
 446     def get_duration(self):
 447         return self.episode.get_duration()
 448
 449     @property
 450     def end_datetime(self):
 451         return self.datetime + datetime.timedelta(minutes=self.get_duration())
 452
 453
 454 @python_2_unicode_compatible
 455 class Absence(models.Model):
 456
 457     class Meta:
 458         verbose_name = _('Absence')
 459         verbose_name_plural = _('Absences')
 460
 461     emission = models.ForeignKey('Emission', verbose_name=u'Emission')
 462     datetime = models.DateTimeField(_('Date/time'), db_index=True)
 463
 464     def __str__(self):
 465         return u'Absence for %s on %s' % (self.emission.title, self.datetime)
 466
 467
 468 def get_sound_path(instance, filename):
 469     return os.path.join('sounds.orig', instance.episode.emission.slug,
 470             os.path.basename(filename))
 471
 472
 473 @python_2_unicode_compatible
 474 class SoundFile(models.Model):
 475
 476     class Meta:
 477         verbose_name = _('Sound file')
 478         verbose_name_plural = _('Sound files')
 479         ordering = ['creation_timestamp']
 480
 481     episode = models.ForeignKey('Episode', verbose_name=_('Episode'))
 482     file = models.FileField(_('File'), upload_to=get_sound_path, max_length=250)
 483     podcastable = models.BooleanField(_('Podcastable'), default=False,
 484             db_index=True,
 485             help_text=_('The file can be published online according to SABAM rules.'))
 486     fragment = models.BooleanField(_('Fragment'), default=False, db_index=True,
 487             help_text=_('The file is some segment or extra content, not the complete recording.'))
 488     title = models.CharField(_('Title'), max_length=200)
 489     duration = models.IntegerField(_('Duration'), null=True, help_text=_('In seconds'))
 490
 491     format = models.ForeignKey('Format', verbose_name=_('Format'), null=True, blank=True)
 492     license = models.CharField(_('License'), max_length=20, blank=True, default='', choices=LICENSES)
 493
 494     # denormalized from Focus
 495     got_focus = models.DateTimeField(default=None, null=True, blank=True)
 496     has_focus = models.BooleanField(default=False)
 497
 498     creation_timestamp = models.DateTimeField(auto_now_add=True, null=True)
 499     last_update_timestamp = models.DateTimeField(auto_now=True, null=True)
 500
 501     def compute_duration(self):
 502         for path in (self.get_format_path('ogg'), self.get_format_path('mp3'), self.file.path):
 503             self.duration = get_duration(path)
 504             if self.duration:
 505                 return
 506
 507     def get_format_filename(self, format):
 508         return '%s_%05d__%s.%s' % (
 509                 self.episode.slug,
 510                 self.id,
 511                 (self.fragment and '0' or '1'),
 512                 format)
 513
 514     def get_format_path(self, format):
 515         if not self.file:
 516             return None
 517         return '%s/%s' % (os.path.dirname(self.file.path).replace('.orig', ''), self.get_format_filename(format))
 518
 519     def get_format_url(self, format):
 520         if not self.file:
 521             return None
 522         return '%s/%s' % (os.path.dirname(self.file.url).replace('.orig', ''), self.get_format_filename(format))
 523
 524     def get_duration_string(self):
 525         if not self.duration:
 526             return ''
 527         return '%d:%02d' % (self.duration/60, self.duration%60)
 528
 529     def __str__(self):
 530         return '%s - %s' % (self.title or self.id, self.episode.title)
 531
 532
 533 @python_2_unicode_compatible
 534 class NewsCategory(models.Model):
 535
 536     class Meta:
 537         verbose_name = _('News Category')
 538         verbose_name_plural = _('News Categories')
 539         ordering = ['title']
 540
 541     title = models.CharField(_('Title'), max_length=50)
 542     slug = models.SlugField(null=True)
 543
 544     def __str__(self):
 545         return self.title
 546
 547     def get_sorted_newsitems(self):
 548         return self.newsitem_set.select_related().order_by('-date')
 549
 550
 551 def get_newsitem_image_path(instance, filename):
 552     return os.path.join('images', 'news', instance.slug,
 553             os.path.basename(filename))
 554
 555
 556 @python_2_unicode_compatible
 557 class NewsItem(models.Model):
 558
 559     class Meta:
 560         verbose_name = _('News Item')
 561         verbose_name_plural = _('News Items')
 562         ordering = ['title']
 563
 564     title = models.CharField(_('Title'), max_length=200)
 565     slug = models.SlugField(max_length=200)
 566     text = RichTextField(_('Description'))
 567     date = models.DateField(_('Publication Date'),
 568             help_text=_('The news won\'t appear on the website before this date.'))
 569     image = models.ImageField(_('Image'),
 570             upload_to=get_newsitem_image_path, max_length=250, null=True, blank=True)
 571
 572     tags = TaggableManager(_('Tags'), blank=True)
 573     category = models.ForeignKey('NewsCategory', verbose_name=_('Category'), null=True, blank=True)
 574     emission = models.ForeignKey('Emission', verbose_name=_('Emission'), null=True, blank=True)
 575
 576     expiration_date = models.DateField(_('Expiration Date'), null=True, blank=True)
 577     event_date = models.DateField(_('Event Date'), null=True, blank=True,
 578             help_text=_('If this is an event, set the date here so it appears in the agenda.'))
 579
 580     # denormalized from Focus
 581     got_focus = models.DateTimeField(default=None, null=True, blank=True)
 582     has_focus = models.BooleanField(default=False)
 583
 584     creation_timestamp = models.DateTimeField(auto_now_add=True, null=True)
 585     last_update_timestamp = models.DateTimeField(auto_now=True, null=True)
 586
 587     def __str__(self):
 588         return self.title
 589
 590     def get_absolute_url(self):
 591         return reverse('newsitem-view', kwargs={'slug': str(self.slug)})
 592
 593
 594 @python_2_unicode_compatible
 595 class Nonstop(models.Model):
 596
 597     class Meta:
 598         verbose_name = _('Nonstop zone')
 599         verbose_name_plural = _('Nonstop zones')
 600         ordering = ['title']
 601
 602     title = models.CharField(_('Title'), max_length=50)
 603     slug = models.SlugField()
 604
 605     start = models.TimeField(_('Start'))
 606     end = models.TimeField(_('End'))
 607     text = RichTextField(_('Description'), null=True, blank=True)
 608     redirect_path = models.CharField(_('Redirect Path'), max_length=200, blank=True)
 609
 610     def __str__(self):
 611         return self.title
 612
 613
 614 @python_2_unicode_compatible
 615 class Focus(models.Model):
 616     title = models.CharField(_('Alternate Title'), max_length=50,
 617             null=True, blank=True)
 618     newsitem = models.ForeignKey('NewsItem', verbose_name=_('News Item'),
 619             null=True, blank=True)
 620     emission = models.ForeignKey('Emission', verbose_name=_('Emission'),
 621             null=True, blank=True)
 622     episode = models.ForeignKey('Episode', verbose_name=_('Episode'),
 623             null=True, blank=True)
 624     soundfile = models.ForeignKey('SoundFile', verbose_name=_('Sound file'),
 625             null=True, blank=True)
 626     page = models.ForeignKey('data.Page', verbose_name=_('Page'),
 627             null=True, blank=True)
 628     current = models.BooleanField('Current', default=True)
 629
 630     creation_timestamp = models.DateTimeField(auto_now_add=True, null=True)
 631     last_update_timestamp = models.DateTimeField(auto_now=True, null=True)
 632
 633     def __str__(self):
 634         if self.newsitem:
 635             return u'Newsitem: %s' % self.newsitem.title
 636         if self.emission:
 637             return u'Emission: %s' % self.emission.title
 638         if self.episode:
 639             return u'Episode: %s' % self.episode.title
 640         if self.soundfile:
 641             return u'Soundfile: %s' % (self.soundfile.title or self.soundfile.episode.title)
 642         if self.page:
 643             return u'Page: %s' % self.page.title
 644         return u'%s' % self.id
 645
 646     def focus_title(self):
 647         if self.title:
 648             return self.title
 649         if self.newsitem:
 650             return self.newsitem.title
 651         if self.emission:
 652             return self.emission.title
 653         if self.page:
 654             return self.page.title
 655
 656         episode = None
 657         if self.soundfile:
 658             if self.soundfile.fragment and self.soundfile.title:
 659                 return self.soundfile.title
 660             episode = self.soundfile.episode
 661         elif self.episode:
 662             episode = self.episode
 663
 664         if episode:
 665             if episode.title:
 666                 return episode.title
 667             else:
 668                 return episode.emission.title
 669
 670         return None
 671
 672     def content_image(self):
 673         if self.newsitem:
 674             return self.newsitem.image
 675         if self.emission:
 676             return self.emission.image
 677         if self.page:
 678             return self.page.picture
 679
 680         episode = None
 681         if self.soundfile:
 682             episode = self.soundfile.episode
 683         elif self.episode:
 684             episode = self.episode
 685
 686         if episode:
 687             if episode.image:
 688                 return episode.image
 689             else:
 690                 return episode.emission.image
 691
 692     def content_category_title(self):
 693         if self.newsitem:
 694             if self.newsitem.category:
 695                 return self.newsitem.category.title
 696             return _('News')
 697         if self.emission:
 698             return _('Emission')
 699         if self.episode:
 700             return self.episode.emission.title
 701         if self.soundfile:
 702             return self.soundfile.episode.emission.title
 703         if self.page:
 704             return 'Topik'
 705
 706     def get_related_object(self):
 707         try:
 708             if self.newsitem:
 709                 return self.newsitem
 710             if self.emission:
 711                 return self.emission
 712             if self.episode:
 713                 return self.episode
 714             if self.soundfile:
 715                 return self.soundfile
 716             if self.page:
 717                 from panikombo.models import Topik
 718                 return Topik.objects.get(page=self.page)
 719         except ObjectDoesNotExist:
 720             return None
 721
 722         return None
 723
 724
 725 def get_playlist_sound_path(instance, filename):
 726     return os.path.join('playlists', instance.episode.emission.slug,
 727             instance.episode.slug, os.path.basename(filename))
 728
 729
 730 class PlaylistElement(models.Model):
 731     episode = models.ForeignKey('Episode', null=True)
 732     title = models.CharField(_('Title'), max_length=200)
 733     notes = models.CharField(_('Notes'), max_length=200, blank=True, default='')
 734     sound = models.FileField(_('Sound'), upload_to=get_playlist_sound_path, max_length=250)
 735     order = models.PositiveIntegerField()
 736
 737     class Meta:
 738         verbose_name = _('Playlist Element')
 739         verbose_name_plural = _('Playlist Elements')
 740         ordering = ['order']
 741
 742     def shortcut(self):
 743         return chr(ord('a')+self.order-1)
 744
 745
 746 @receiver(pre_save, sender=Focus, dispatch_uid='focus_pre_save')
 747 def set_focus_on_save(sender, instance, **kwargs):
 748     object = instance.get_related_object()
 749     must_save = False
 750     if instance.current != object.has_focus:
 751         object.has_focus = instance.current
 752         must_save = True
 753     if object and not object.got_focus and instance.current:
 754         object.got_focus = datetime.datetime.now()
 755         must_save = True
 756     if must_save:
 757         object.save()
 758
 759 @receiver(post_delete, sender=Focus, dispatch_uid='focus_post_delete')
 760 def remove_focus_on_delete(sender, instance, **kwargs):
 761     object = instance.get_related_object()
 762     if object and (object.got_focus or object.has_focus):
 763         object.got_focus = None
 764         object.has_focus = False
 765         object.save()