forked from rc/aircox
579 lines
17 KiB
Python
Executable File
579 lines
17 KiB
Python
Executable File
import os
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# django
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from django.db import models
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from django.contrib.auth.models import User
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from django.template.defaultfilters import slugify
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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.utils.translation import ugettext as _, ugettext_lazy
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from django.utils import timezone
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from django.utils.html import strip_tags
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# extensions
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from taggit.managers import TaggableManager
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import programs.settings as settings
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# Frequency for schedules. Basically, it is a mask of bits where each bit is a
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# 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 the
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# schedule is present.
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Frequency = {
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'ponctual': 0b000000
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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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}
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# Translators: html safe values
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ugettext_lazy('ponctual')
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ugettext_lazy('every')
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ugettext_lazy('first')
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ugettext_lazy('second')
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ugettext_lazy('third')
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ugettext_lazy('fourth')
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ugettext_lazy('first and third')
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ugettext_lazy('second and fourth')
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ugettext_lazy('one on two')
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EventType = {
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'diffuse': 0x01 # the diffusion is planified or done
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, 'cancel': 0x03 # the diffusion has been canceled from grid; useful to give
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# the info to the users
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, 'stop': 0x04 # the diffusion been arbitrary stopped (non-stop or not)
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}
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class Model (models.Model):
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@classmethod
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def type (cl):
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"""
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Return a string with the type of the model (class name lowered)
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"""
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name = cl.__name__.lower()
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return name
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@classmethod
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def type_plural (cl):
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"""
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Return a string with the name in plural of the model (cf. name())
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"""
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return cl.type() + 's'
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@classmethod
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def name (cl, plural = False):
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"""
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Return the name of the model using meta.verbose_name
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"""
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if plural:
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return cl._meta.verbose_name_plural.title()
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return cl._meta.verbose_name.title()
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class Meta:
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abstract = True
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class Metadata (Model):
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"""
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meta is used to extend a model for future needs
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"""
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author = models.ForeignKey (
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User
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, verbose_name = _('author')
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, blank = True
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, null = True
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)
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title = models.CharField(
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_('title')
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, max_length = 128
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)
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date = models.DateTimeField(
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_('date')
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, default = timezone.datetime.now
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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 = _('publication is public')
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)
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# FIXME: add a field to specify if the element should be listed or not
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meta = models.TextField(
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_('meta')
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, blank = True
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, null = True
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)
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tags = TaggableManager(
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_('tags')
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, blank = True
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)
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class Meta:
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abstract = True
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class Publication (Metadata):
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def get_slug_name (self):
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return slugify(self.title)
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def __str__ (self):
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return self.title + ' (' + str(self.id) + ')'
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subtitle = models.CharField(
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_('subtitle')
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, max_length = 128
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, blank = True
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)
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img = models.ImageField(
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_('image')
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, upload_to = "images"
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, blank = True
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)
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content = models.TextField(
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_('content')
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, blank = True
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)
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can_comment = models.BooleanField(
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_('enable comments')
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, default = True
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, help_text = _('comments are enabled on this publication')
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)
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#
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# Class methods
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#
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@staticmethod
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def _exclude_args (allow_unpublished = False, prefix = ''):
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if allow_unpublished:
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return {}
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res = {}
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res[prefix + 'public'] = False
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res[prefix + 'date__gt'] = timezone.now()
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return res
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@classmethod
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def get_available (cl, first = False, **kwargs):
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"""
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Return the result of filter(kargs) if the resulting publications
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is published and public
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Otherwise, return None
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"""
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kwargs['public'] = True
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kwargs['date__lte'] = timezone.now()
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e = cl.objects.filter(**kwargs)
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if first:
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return (e and e[0]) or None
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return e or None
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#
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# Instance's methods
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#
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def get_parents ( self, order_by = "desc", include_fields = None ):
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"""
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Return an array of the parents of the item.
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If include_fields is an array of files to include.
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"""
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# TODO: fields included
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# FIXME: parameter name + container
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parents = [ self ]
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while parents[-1].parent:
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parent = parents[-1].parent
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if parent not in parents:
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# avoid cycles
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parents.append(parent)
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parents = parents[1:]
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if order_by == 'desc':
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return reversed(parents)
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return parents
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class Meta:
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abstract = True
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#
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# Usable models
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#
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class Track (Model):
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artist = models.CharField(
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_('artist')
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, max_length = 128
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, blank = True
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)
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title = models.CharField(
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_('title')
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, max_length = 128
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)
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version = models.CharField(
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_('version')
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, max_length = 128
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, blank = True
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, help_text = _('additional informations on that track')
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)
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tags = TaggableManager( blank = True )
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def __str__(self):
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return ' '.join([self.title, _('by'), self.artist,
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(self.version and ('(' + self.version + ')') or '') ])
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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 SoundFile (Metadata):
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parent = models.ForeignKey(
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'Episode'
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, verbose_name = _('episode')
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, blank = True
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, null = True
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)
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file = models.FileField( #FIXME: filefield
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_('file')
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, upload_to = lambda i, f: SoundFile.__upload_path(i,f)
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)
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duration = models.TimeField(
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_('duration')
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, blank = True
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, null = True
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)
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fragment = models.BooleanField(
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_('incomplete sound')
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, default = False
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, help_text = _("the file has been cut")
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)
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embed = models.TextField(
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_('embed HTML code from external website')
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, blank = True
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, null = True
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, help_text = _('if set, consider the sound podcastable from there')
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)
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removed = models.BooleanField(
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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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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.file.path).st_mtime
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mtime = timezone.datetime.fromtimestamp(mtime)
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return timezone.make_aware(mtime, timezone.get_current_timezone())
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def save (self, *args, **kwargs):
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if not self.pk:
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self.date = self.get_mtime()
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super(SoundFile, self).save(*args, **kwargs)
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def __upload_path (self, filename):
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if self.parent and self.parent.parent:
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path = self.parent.parent.path
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else:
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path = settings.AIRCOX_SOUNDFILE_DEFAULT_DIR
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return os.path.join(path, filename)
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def __str__ (self):
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return str(self.id) + ': ' + self.file.name
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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 Schedule (Model):
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parent = models.ForeignKey( 'Program', blank = True, null = True )
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date = models.DateTimeField(_('start'))
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duration = models.TimeField(
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_('duration')
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, blank = True
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, null = True
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)
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frequency = models.SmallIntegerField(
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_('frequency')
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, choices = [ (y, x) for x,y in Frequency.items() ]
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)
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rerun = models.ForeignKey(
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'self'
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, blank = True
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, null = True
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, help_text = "Schedule of a rerun"
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)
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def match (self, date = None, check_time = False):
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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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if not date:
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date = timezone.datetime.today()
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if self.date.weekday() == date.weekday() and self.match_week(date):
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return (check_time and self.date.time() == date.date.time()) or 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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if not date:
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date = timezone.datetime.today()
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if self.frequency == Frequency['ponctual']:
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return None
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if self.frequency == 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 = timezone.datetime.date(date.year, date.month, 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
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, 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 the month of the given
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date (= today).
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"""
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if self.frequency == Frequency['ponctual']:
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return None
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if not date:
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date = timezone.datetime.today()
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date = timezone.datetime( year = date.year
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, month = date.month
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, day = 1 )
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wday = self.date.weekday()
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fwday = date.weekday()
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# move date to the date weekday of the schedule
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# check on SO#3284452 for the formula
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date += timezone.timedelta(
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days = (7 if fwday > wday else 0) - fwday + wday
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)
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fwday = date.weekday()
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# special frequency case
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weeks = self.frequency
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if self.frequency == Frequency['last']:
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date += timezone.timedelta(month = 1, days = -7)
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return self.normalize([date])
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if weeks == Frequency['one on two']:
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# if both week are the same, then the date week of the month
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# matches. Note: wday % 2 + fwday % 2 => (wday + fwday) % 2
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fweek = date.isocalendar()[1]
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week = self.date.isocalendar()[1]
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weeks = 0b010101 if not (fweek + week) % 2 else 0b001010
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dates = []
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for week in range(0,5):
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# NB: there can be five weeks in a month
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if not weeks & (0b1 << week):
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continue
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wdate = date + timezone.timedelta(days = week * 7)
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if wdate.month == date.month:
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dates.append(self.normalize(wdate))
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return dates
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def __str__ (self):
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frequency = [ x for x,y in Frequency.items() if y == self.frequency ]
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return self.parent.title + ': ' + frequency[0]
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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 Article (Publication):
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parent = models.ForeignKey(
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'self'
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, verbose_name = _('parent')
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, blank = True
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, null = True
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)
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static_page = models.BooleanField(
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_('static page')
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, default = False
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)
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focus = models.BooleanField(
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_('article is focus')
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, blank = True
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, default = False
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)
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class Meta:
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verbose_name = _('Article')
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verbose_name_plural = _('Articles')
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class Program (Publication):
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parent = models.ForeignKey(
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Article
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, verbose_name = _('parent')
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, blank = True
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, null = True
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)
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email = models.EmailField(
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_('email')
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, max_length = 128
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, null = True
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, blank = True
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)
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url = models.URLField(
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_('website')
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, blank = True
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, null = True
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)
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non_stop = models.SmallIntegerField(
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_('non-stop priority')
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, help_text = _('this program can be used as non-stop')
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, default = -1
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)
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@property
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def path (self):
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return os.path.join( settings.AIRCOX_PROGRAMS_DIR
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, slugify(self.title + '_' + str(self.id))
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)
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def find_schedules (self, date):
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"""
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Return schedules that match a given date
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"""
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schedules = Schedule.objects.filter(parent = self)
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r = []
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for schedule in schedules:
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if schedule.match_date(date):
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r.append(schedule)
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return r
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class Meta:
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verbose_name = _('Program')
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verbose_name_plural = _('Programs')
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class Episode (Publication):
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# Note:
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# We do not especially need a duration here, because even if an
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# emussion's schedule can have specified durations, in practice this
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# duration may vary. Furthermore, we want the users have to enter a
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# minimum of values.
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# Duration can be retrieved from the sound file if there is one.
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#
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# FIXME: ponctual replays?
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parent = models.ForeignKey(
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Program
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, verbose_name = _('parent')
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)
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tracks = models.ManyToManyField(
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Track
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, verbose_name = _('playlist')
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, blank = True
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)
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class Meta:
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verbose_name = _('Episode')
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verbose_name_plural = _('Episodes')
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class Event (Model):
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"""
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Event logs and planifications.
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An event is:
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- scheduled: when it has been generated following programs' Schedule
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- planified: when it has been generated manually/ponctually or scheduled
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"""
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parent = models.ForeignKey (
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Episode
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, blank = True
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, null = True
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)
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program = models.ForeignKey (
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Program
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)
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type = models.SmallIntegerField(
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_('type')
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, choices = [ (y, x) for x,y in EventType.items() ]
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)
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date = models.DateTimeField( _('date of event start') )
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stream = models.SmallIntegerField(
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_('stream')
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, default = 0
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, help_text = 'stream id on which the event happens'
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)
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scheduled = models.BooleanField(
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_('automated')
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, default = False
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, help_text = 'event generated automatically'
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)
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class Meta:
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verbose_name = _('Event')
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verbose_name_plural = _('Events')
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