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Refactored signals to their own module
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Dave St.Germain
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Jan 3, 2019
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,106 @@ | ||
| "edx-proctoring signals" | ||
| from django.db.models.signals import pre_save, post_save, pre_delete | ||
| from django.dispatch import receiver | ||
| from edx_proctoring import models | ||
| from edx_proctoring.backends import get_backend_provider | ||
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| @receiver(post_save, sender=models.ProctoredExamReviewPolicy) | ||
| @receiver(post_save, sender=models.ProctoredExam) | ||
| def _save_exam_on_backend(sender, instance, **kwargs): # pylint: disable=unused-argument | ||
| """ | ||
| Save the exam to the backend provider when our model changes. | ||
| It also combines the review policy into the exam when saving to the backend | ||
| """ | ||
| if sender == models.ProctoredExam: | ||
| exam_obj = instance | ||
| review_policy = models.ProctoredExamReviewPolicy.get_review_policy_for_exam(instance.id) | ||
| else: | ||
| exam_obj = instance.proctored_exam | ||
| review_policy = instance | ||
| if exam_obj.is_proctored: | ||
| from edx_proctoring.serializers import ProctoredExamSerializer | ||
| exam = ProctoredExamSerializer(exam_obj).data | ||
| if review_policy: | ||
| exam['rule_summary'] = review_policy.review_policy | ||
| backend = get_backend_provider(exam) | ||
| external_id = backend.on_exam_saved(exam) | ||
| if external_id and external_id != exam_obj.external_id: | ||
| exam_obj.external_id = external_id | ||
| exam_obj.save() | ||
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| # Hook up the pre_save signal to record creations in the ProctoredExamReviewPolicyHistory table. | ||
| @receiver(pre_save, sender=models.ProctoredExamReviewPolicy) | ||
| @receiver(pre_delete, sender=models.ProctoredExamReviewPolicy) | ||
| def on_review_policy_changed(sender, instance, signal, **kwargs): # pylint: disable=unused-argument | ||
| """ | ||
| Archiving all changes made to the Review Policy. | ||
| Will only archive on update/delete, and not on new entries created. | ||
| """ | ||
| if signal is pre_save: | ||
| if instance.id: | ||
| instance = sender.objects.get(id=instance.id) | ||
| else: | ||
| return | ||
| models.archive_model(models.ProctoredExamReviewPolicyHistory, instance, id='original_id') | ||
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| # Hook up the post_save signal to record creations in the ProctoredExamStudentAllowanceHistory table. | ||
| @receiver(pre_save, sender=models.ProctoredExamStudentAllowance) | ||
| @receiver(pre_delete, sender=models.ProctoredExamStudentAllowance) | ||
| def on_allowance_saved(sender, instance, signal, **kwargs): # pylint: disable=unused-argument | ||
| """ | ||
| Archiving all changes made to the Student Allowance. | ||
| Will only archive on update/delete, and not on new entries created. | ||
| """ | ||
|
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| if signal is pre_save: | ||
| if instance.id: | ||
| instance = sender.objects.get(id=instance.id) | ||
| else: | ||
| return | ||
| models.archive_model(models.ProctoredExamStudentAllowanceHistory, instance, id='allowance_id') | ||
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| @receiver(pre_save, sender=models.ProctoredExamStudentAttempt) | ||
| @receiver(pre_delete, sender=models.ProctoredExamStudentAttempt) | ||
| def on_attempt_updated(sender, instance, signal, **kwargs): # pylint: disable=unused-argument | ||
| """ | ||
| Archive the exam attempt whenever the attempt status is about to be | ||
| modified. Make a new entry with the previous value of the status in the | ||
| ProctoredExamStudentAttemptHistory table. | ||
| """ | ||
|
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| if signal is pre_save: | ||
| if instance.id: | ||
| # on an update case, get the original | ||
| # and see if the status has changed, if so, then we need | ||
| # to archive it | ||
| original = sender.objects.get(id=instance.id) | ||
|
|
||
| if original.status != instance.status: | ||
| instance = original | ||
| else: | ||
| return | ||
| else: | ||
| return | ||
| models.archive_model(models.ProctoredExamStudentAttemptHistory, instance, id='attempt_id') | ||
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| # Hook up the signals to record updates/deletions in the ProctoredExamStudentAllowanceHistory table. | ||
| @receiver(pre_save, sender=models.ProctoredExamSoftwareSecureReview) | ||
| @receiver(pre_delete, sender=models.ProctoredExamSoftwareSecureReview) | ||
| def on_review_saved(sender, instance, signal, **kwargs): # pylint: disable=unused-argument | ||
| """ | ||
| Archiving all changes made to the Review. | ||
| Will only archive on update/delete, and not on new entries created. | ||
| """ | ||
| if signal is pre_save: | ||
| if instance.id: | ||
| # only for update cases | ||
| instance = sender.objects.get(id=instance.id) | ||
| else: | ||
| # don't archive on create | ||
| return | ||
| models.archive_model(models.ProctoredExamSoftwareSecureReviewHistory, instance, id='review_id') |