Source code for concepts.signals

from django.db.models.signals import post_save
from django.dispatch import receiver

from .authorities import resolve
from .models import Concept, Type
from concepts.tasks import resolve_concept, add_concept

import logging
logging.basicConfig()
logger = logging.getLogger(__name__)
logger.setLevel('DEBUG')


### Handle Concept and Type signals. ###
@receiver(post_save, sender=Concept)
def concept_post_save_receiver(sender, **kwargs):
    """
    When a :class:`.Concept` is saved, attempt to resolve it using one of the
    registered :class:`.AuthorityManager` classes if the :class:`.Concept` is
    not already :prop:`.resolved`\.
    """
    instance = kwargs.get('instance', None)
    if instance:
        resolve_concept.delay(sender, instance)


@receiver(post_save, sender=Concept)
def concept_post_save_approve_receiver(sender, **kwargs):
    """
    When a :class:`.Concept` is saved, attempt to add it using one of the
    registered :class:`.AuthorityManager` classes to ConceptPower if the
    :class:`.Concept` is :prop:`.approved`\.
    """
    instance = kwargs.get('instance', None)
    if instance and instance.concept_state == Concept.APPROVED:
        add_concept.delay(sender, instance)


@receiver(post_save, sender=Type)
def type_post_save_receiver(sender, **kwargs):
    """
    When a :class:`.Type` is saved, attempt to resolve it using one of the
    registered :class:`.AuthorityManager` classes if the :class:`.Type` is
    not already :prop:`.resolved`\.
    """
    instance = kwargs.get('instance', None)
    if instance:
        resolve_concept.delay(sender, instance)