105 lines
4.1 KiB
Python
105 lines
4.1 KiB
Python
from django.conf import settings
|
|
from django.db.models.signals import pre_save, post_save, pre_delete, post_delete
|
|
from django.dispatch import receiver
|
|
from django.utils.translation import gettext_lazy as _
|
|
from background_task.signals import task_failed
|
|
from background_task.models import Task
|
|
from common.logger import log
|
|
from .models import Source, Media
|
|
from .tasks import (delete_task, index_source_task, download_media_thumbnail,
|
|
map_task_to_instance)
|
|
from .utils import delete_file
|
|
|
|
|
|
@receiver(pre_save, sender=Source)
|
|
def source_pre_save(sender, instance, **kwargs):
|
|
# Triggered before a source is saved, if the schedule has been updated recreate
|
|
# its indexing task
|
|
try:
|
|
existing_source = Source.objects.get(pk=instance.pk)
|
|
except Source.DoesNotExist:
|
|
# Probably not possible?
|
|
return
|
|
if existing_source.index_schedule != instance.index_schedule:
|
|
# Indexing schedule has changed, recreate the indexing task
|
|
delete_task('sync.tasks.index_source_task', instance.pk)
|
|
verbose_name = _('Index media from source "{}"')
|
|
index_source_task(
|
|
str(instance.pk),
|
|
repeat=instance.index_schedule,
|
|
queue=str(instance.pk),
|
|
verbose_name=verbose_name.format(instance.name)
|
|
)
|
|
|
|
|
|
@receiver(post_save, sender=Source)
|
|
def source_post_save(sender, instance, created, **kwargs):
|
|
# Triggered after a source is saved
|
|
if created:
|
|
# Create a new indexing task for newly created sources
|
|
delete_task('sync.tasks.index_source_task', instance.pk)
|
|
log.info(f'Scheduling media indexing for source: {instance.name}')
|
|
verbose_name = _('Index media from source "{}"')
|
|
index_source_task(
|
|
str(instance.pk),
|
|
repeat=instance.index_schedule,
|
|
queue=str(instance.pk),
|
|
verbose_name=verbose_name.format(instance.name)
|
|
)
|
|
|
|
|
|
@receiver(pre_delete, sender=Source)
|
|
def source_pre_delete(sender, instance, **kwargs):
|
|
# Triggered before a source is deleted, delete all media objects to trigger
|
|
# the Media models post_delete signal
|
|
for media in Media.objects.filter(source=instance):
|
|
log.info(f'Deleting media for source: {instance.name} item: {media.name}')
|
|
media.delete()
|
|
|
|
|
|
@receiver(post_delete, sender=Source)
|
|
def source_post_delete(sender, instance, **kwargs):
|
|
# Triggered after a source is deleted
|
|
log.info(f'Deleting tasks for source: {instance.name}')
|
|
delete_task('sync.tasks.index_source_task', instance.pk)
|
|
|
|
|
|
@receiver(task_failed, sender=Task)
|
|
def task_task_failed(sender, task_id, completed_task, **kwargs):
|
|
# Triggered after a task fails by reaching its max retry attempts
|
|
obj, url = map_task_to_instance(completed_task)
|
|
if isinstance(obj, Source):
|
|
log.error(f'Permanent failure for source: {obj} task: {completed_task}')
|
|
obj.has_failed = True
|
|
obj.save()
|
|
|
|
|
|
@receiver(post_save, sender=Media)
|
|
def media_post_save(sender, instance, created, **kwargs):
|
|
# Triggered after media is saved
|
|
if created:
|
|
# If the media is newly created start a task to download its thumbnail
|
|
metadata = instance.loaded_metadata
|
|
thumbnail_url = metadata.get('thumbnail', '')
|
|
if thumbnail_url:
|
|
log.info(f'Scheduling task to download thumbnail for: {instance.name} '
|
|
f'from: {thumbnail_url}')
|
|
verbose_name = _('Downloading media thumbnail for "{}"')
|
|
download_media_thumbnail(
|
|
str(instance.pk),
|
|
thumbnail_url,
|
|
queue=str(instance.source.pk),
|
|
verbose_name=verbose_name.format(instance.name)
|
|
)
|
|
|
|
|
|
@receiver(pre_delete, sender=Media)
|
|
def media_pre_delete(sender, instance, **kwargs):
|
|
# Triggered before media is deleted, delete any scheduled tasks
|
|
log.info(f'Deleting tasks for media: {instance.name}')
|
|
delete_task('sync.tasks.download_media_thumbnail', instance.source.pk)
|
|
# Delete media thumbnail if it exists
|
|
if instance.thumb:
|
|
log.info(f'Deleting thumbnail for: {instance} path: {instance.thumb.path}')
|
|
delete_file(instance.thumb.path)
|