def learner_flow(request, lti_consumer, tool_provider, collection_slug=None, group_slug=None, unique_marker=''):
"""
Define logic flow for Learner.
"""
if not collection_slug:
return stub_page(request)
collection, collection_group, engine = get_collection_collectiongroup_engine(collection_slug, group_slug)
lti_user, created = LtiUser.objects.get_or_create(
user_id=request.POST['user_id'],
lti_consumer=lti_consumer,
defaults={'course_id': request.POST['context_id']}
)
log.debug("LTI user {}: user_id='{}'".format('created' if created else 'picked', lti_user.user_id))
sequence, created = Sequence.objects.get_or_create(
lti_user=lti_user,
collection=collection,
group=collection_group,
suffix=unique_marker,
)
# Update sequence metadata with lti parameters required by the engine
sequence.fulfil_sequence_metadata(engine.lti_params, tool_provider.launch_params)
strict_forward = collection.strict_forward
request.session['Lti_sequence'] = sequence.id
request.session['Lti_strict_forward'] = strict_forward
if sequence.completed:
log.debug("Sequence {} is already completed".format(sequence.id))
return redirect(reverse('module:sequence-complete', kwargs={'pk': sequence.id}))
if created:
log.debug("Sequence {} was created".format(sequence))
start_activity = module_utils.choose_activity(sequence_item=None, sequence=sequence)
if not start_activity:
log.warning('Instructor configured empty Collection.')
return stub_page(
request,
title="Warning",
message="Cannot get the first question to start.",
tip="Please try again later"
)
sequence_item = create_sequence_item(
request, sequence, start_activity, tool_provider, lti_consumer
)
else:
sequence_item = find_last_sequence_item(sequence, strict_forward)
sequence_item_id = sequence_item.id if sequence_item else None
if not sequence_item_id:
return stub_page(
request,
title="Warning",
message="Cannot find sequence item to start from.",
tip="Ask help from the site admins."
)
return redirect(reverse('module:sequence-item', kwargs={'pk': sequence_item_id}))
def sequence_item_next(request, pk):
try:
next_forbidden, last_item, sequence_item = _check_next_forbidden(pk)
except SequenceItem.DoesNotExist:
log.exception("SequenceItem which supposed to exist can't be found!")
return render(
request,
template_name="bridge_lti/announcement.html",
context={
'title': 'Something went wrong...',
'message':
'Internal problem was occurred, please, inform course personal about your experience.',
'tip': "ERROR: next sequence item can't be proposed",
})
if next_forbidden:
return redirect("{}?forbidden=true".format(
reverse('module:sequence-item', kwargs={'pk': sequence_item.id})))
next_sequence_item = SequenceItem.objects.filter(
sequence=sequence_item.sequence,
position=sequence_item.position + 1).first()
log.debug("Picked next sequence item is: {}".format(next_sequence_item))
if not next_sequence_item or next_sequence_item.position == last_item:
activity = utils.choose_activity(sequence_item)
update_activity = request.session.pop('Lti_update_activity', None)
if next_sequence_item is None:
sequence = sequence_item.sequence
policy = sequence.collection_order.grading_policy.policy_instance(
sequence=sequence)
policy.send_grade()
if not activity:
if sequence.completed:
return redirect(
reverse('module:sequence-complete',
kwargs={'pk': sequence_item.sequence_id}))
return stub_page(
request,
title="Warning",
message="Cannot get next activity from the engine.",
tip="Try again later or connect with the instructor.")
next_sequence_item = SequenceItem.objects.create(
sequence=sequence_item.sequence,
activity=activity,
position=sequence_item.position + 1)
elif update_activity:
log.debug(
'Bridge updates activity in the un-submitted SequenceItem')
if activity:
next_sequence_item.activity = activity
next_sequence_item.save()
return redirect(
reverse('module:sequence-item', kwargs={'pk': next_sequence_item.id}))
def demo_collection(request, collection_order_slug):
"""
View for the demonstration and testing of the adaptivity behaviour.
"""
__, collection_order = get_engine_and_collection_order(
collection_order_slug)
lti_lms_platform = LtiLmsPlatform.objects.first()
test_lti_user, created = LtiUser.objects.get_or_create(
user_id=DEMO_USER,
lti_lms_platform=lti_lms_platform,
)
test_sequence, created = Sequence.objects.get_or_create(
lti_user=test_lti_user, collection_order=collection_order)
strict_forward = collection_order.strict_forward
request.session['Lti_sequence'] = test_sequence.id
request.session['Lti_strict_forward'] = strict_forward
back_url = request.GET.get('back_url', '')
context = {
'sequence_pk': test_sequence.id,
'back_url': back_url,
'forbidden': request.GET.get('forbidden', ''),
}
if created or not test_sequence.items.exists():
suffix = int(datetime.datetime.now().timestamp())
cache.set(settings.TEST_SEQUENCE_SUFFIX, suffix)
test_sequence.suffix = suffix
test_sequence.save()
log.debug("Sequence {} was created".format(test_sequence))
start_activity = utils.choose_activity(sequence=test_sequence)
if not start_activity:
log.warning('Instructor configured empty Collection.')
return stub_page(
request,
title="Warning",
message="Cannot get the first question to start.",
tip="Please try again later",
demo=True,
sequence=test_sequence,
back_url=back_url,
)
sequence_item = SequenceItem.objects.create(sequence=test_sequence,
activity=start_activity,
position=1)
next_forbidden, _, _ = _check_next_forbidden(sequence_item.id)
context.update({"forbidden": next_forbidden})
else:
s_item_id = request.GET.get(
'sequence_item_id') or test_sequence.items.last().id
log.debug(f'SequienceItem id: {s_item_id}')
next_forbidden, last_item, sequence_item = _check_next_forbidden(
s_item_id)
position = int(request.GET.get('position') or 1)
if not (next_forbidden and position > sequence_item.position):
update_activity = request.session.pop('Lti_update_activity', None)
sequence_item, sequence_complete, stub = utils.select_next_sequence_item(
sequence_item,
update_activity,
last_item,
position,
)
next_forbidden, _, _ = _check_next_forbidden(sequence_item.id)
context.update({"forbidden": next_forbidden})
if sequence_complete:
context.update({
'sequence_items': test_sequence.items.all(),
'demo': True,
'sequence_item': sequence_item
})
return render(request,
template_name='module/sequence_complete.html',
context=context)
elif stub:
return stub_page(
request,
title="Warning",
message="Cannot get next activity from the engine.",
tip="Try again later or connect with the instructor.",
demo=True,
sequence=test_sequence,
back_url=back_url,
)
context.update({
'sequence_item': sequence_item,
'sequence_items': test_sequence.items.all(),
'demo': True,
'position': sequence_item.position + 1
})
return render(request,
template_name="module/sequence_item.html",
context=context)