def _get_user_statuses(user, course_key, checkpoint):
"""
Retrieve all the information we need to determine the user's group.
This will retrieve the information as a multi-get from the cache.
Args:
user (User): User object
course_key (CourseKey): Identifier for the course.
checkpoint (unicode): Location of the checkpoint in the course (serialized usage key)
Returns:
tuple of booleans of the form (is_verified, has_skipped, has_completed)
"""
enrollment_cache_key = CourseEnrollment.cache_key_name(user.id, unicode(course_key))
has_skipped_cache_key = SkippedReverification.cache_key_name(user.id, unicode(course_key))
verification_status_cache_key = VerificationStatus.cache_key_name(user.id, unicode(course_key))
# Try a multi-get from the cache
cache_values = cache.get_many([
enrollment_cache_key,
has_skipped_cache_key,
verification_status_cache_key
])
# Retrieve whether the user is enrolled in a verified mode.
is_verified = cache_values.get(enrollment_cache_key)
if is_verified is None:
is_verified = CourseEnrollment.is_enrolled_as_verified(user, course_key)
cache.set(enrollment_cache_key, is_verified)
# Retrieve whether the user has skipped any checkpoints in this course
has_skipped = cache_values.get(has_skipped_cache_key)
if has_skipped is None:
has_skipped = SkippedReverification.check_user_skipped_reverification_exists(user, course_key)
cache.set(has_skipped_cache_key, has_skipped)
# Retrieve the user's verification status for each checkpoint in the course.
verification_statuses = cache_values.get(verification_status_cache_key)
if verification_statuses is None:
verification_statuses = VerificationStatus.get_all_checkpoints(user.id, course_key)
cache.set(verification_status_cache_key, verification_statuses)
# Check whether the user has completed this checkpoint
# "Completion" here means *any* submission, regardless of its status
# since we want to show the user the content if they've submitted
# photos.
checkpoint = verification_statuses.get(checkpoint)
has_completed_check = bool(checkpoint)
return (is_verified, has_skipped, has_completed_check)
