463 lines
14 KiB
Python
463 lines
14 KiB
Python
from datetime import datetime, timedelta
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from decimal import Decimal
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from aws_lambda_powertools.event_handler.exceptions import (
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BadRequestError,
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NotFoundError,
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)
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from botocore.args import logger
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from glom import glom
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from layercake.dateutils import fromisoformat, now, ttl
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from layercake.dynamodb import DynamoDBPersistenceLayer, KeyPair, SortKey, TransactKey
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from layercake.strutils import md5_hash
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def update_progress(
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id: str,
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progress: Decimal,
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*,
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dynamodb_persistence_layer: DynamoDBPersistenceLayer,
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):
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now_ = now()
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reminder_ttl = ttl(start_dt=now_, days=7)
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try:
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with dynamodb_persistence_layer.transact_writer() as transact:
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# Update progress only if the enrollment status is `IN_PROGRESS`
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transact.update(
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key=KeyPair(id, '0'),
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update_expr='SET progress = :progress, updated_at = :updated_at',
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cond_expr='#status = :in_progress',
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expr_attr_names={
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'#status': 'status',
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},
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expr_attr_values={
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':in_progress': 'IN_PROGRESS',
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':progress': progress,
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':updated_at': now_,
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},
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exc_cls=EnrollmentConflictError,
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)
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# Schedule a reminder if there is no activity after 7 days
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transact.put(
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item={
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'id': id,
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'sk': 'SCHEDULE#REMINDER_NO_ACTIVITY_AFTER_7_DAYS',
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'ttl': reminder_ttl,
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'created_at': now_,
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}
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)
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except EnrollmentConflictError:
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with dynamodb_persistence_layer.transact_writer() as transact:
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# If the enrollment status is `PENDING`, set it to `IN_PROGRESS`
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# and update progress and updated_at date
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transact.update(
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key=KeyPair(id, '0'),
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update_expr='SET progress = :progress, #status = :in_progress, \
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updated_at = :updated_at',
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cond_expr='#status = :pending',
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expr_attr_names={
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'#status': 'status',
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},
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expr_attr_values={
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':in_progress': 'IN_PROGRESS',
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':pending': 'PENDING',
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':progress': progress,
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':updated_at': now_,
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},
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exc_cls=EnrollmentConflictError,
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)
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# Record the start date if it does not already exist
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transact.put(
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item={
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'id': id,
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'sk': 'STARTED',
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'started_at': now_,
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},
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cond_expr='attribute_not_exists(sk)',
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)
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# Schedule a reminder for inactivity
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transact.put(
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item={
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'id': id,
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'sk': 'SCHEDULE#REMINDER_NO_ACTIVITY_AFTER_7_DAYS',
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'ttl': reminder_ttl,
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'created_at': now_,
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}
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)
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# Remove reminders and policies that no longer apply
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transact.delete(
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key=KeyPair(
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pk=id,
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sk='CANCEL_POLICY',
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),
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)
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transact.delete(
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key=KeyPair(
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pk=id,
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sk='SCHEDULE#REMINDER_NO_ACCESS_AFTER_3_DAYS',
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)
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)
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return True
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def set_score(
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id: str,
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/,
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score: Decimal,
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progress: Decimal,
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*,
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dynamodb_persistence_layer: DynamoDBPersistenceLayer,
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):
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enrollment = dynamodb_persistence_layer.collection.get_items(
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TransactKey(id)
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+ SortKey('0')
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+ SortKey(
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sk='METADATA#COURSE',
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rename_key='metadata__course',
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)
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+ SortKey(
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sk='METADATA#DEDUPLICATION_WINDOW',
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path_spec='offset_days',
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rename_key='dedup_window_offset_days',
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),
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)
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now_ = now()
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user_id = enrollment['user']['id']
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course_id = glom(enrollment, 'course.id')
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created_at: datetime = fromisoformat(enrollment['created_at']) # type: ignore
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access_period = created_at + timedelta(
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days=int(glom(enrollment, 'metadata__course.access_period'))
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)
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try:
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match score >= 70, now_ > access_period:
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case True, True:
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# Got a score of 70 or higher, but the access period has expired
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return _set_status_as_archived(
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id,
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dynamodb_persistence_layer=dynamodb_persistence_layer,
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)
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case True, False:
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# Got a score of 70 or higher, and still within the access period
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return _set_status_as_completed(
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id,
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score,
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progress=progress,
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user_id=user_id,
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course_id=course_id,
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cert_exp_interval=int(
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glom(
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enrollment, 'metadata__course.cert.exp_interval', default=0
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)
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),
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dedup_window_offset_days=int(
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enrollment['dedup_window_offset_days']
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),
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dynamodb_persistence_layer=dynamodb_persistence_layer,
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)
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case False, True:
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# Got a score below 70, and the access period has expired
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return _set_status_as_expired(
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id,
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dynamodb_persistence_layer=dynamodb_persistence_layer,
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)
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case _:
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# Got a score below 70, and still within the access period
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return _set_status_as_failed(
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id,
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score,
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progress=progress,
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user_id=user_id,
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course_id=course_id,
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dynamodb_persistence_layer=dynamodb_persistence_layer,
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)
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except EnrollmentConflictError as err:
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logger.exception(err)
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raise
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def _set_status_as_completed(
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id: str,
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/,
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score: Decimal,
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progress: Decimal,
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*,
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user_id: str,
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course_id: str,
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cert_exp_interval: int,
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dedup_window_offset_days: int,
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dynamodb_persistence_layer: DynamoDBPersistenceLayer,
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) -> bool:
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now_ = now()
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lock_hash = md5_hash(f'{user_id}{course_id}')
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archive_ttl = ttl(
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start_dt=now_,
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days=cert_exp_interval,
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)
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cert_expiration_reminder_ttl = ttl(
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start_dt=now_,
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days=cert_exp_interval - 30,
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)
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deduplication_lock_ttl = ttl(
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start_dt=now_,
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days=cert_exp_interval - dedup_window_offset_days,
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)
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with dynamodb_persistence_layer.transact_writer() as transact:
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transact.update(
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key=KeyPair(pk=id, sk='0'),
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update_expr='SET #status = :completed, progress = :progress, \
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score = :score, updated_at = :updated_at',
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cond_expr='#status = :in_progress',
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expr_attr_names={'#status': 'status'},
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expr_attr_values={
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':completed': 'COMPLETED',
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':in_progress': 'IN_PROGRESS',
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':score': score,
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':updated_at': now_,
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':progress': progress,
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},
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exc_cls=EnrollmentConflictError,
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)
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transact.put(
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item={
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'id': id,
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'sk': 'COMPLETED',
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'completed_at': now_,
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},
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cond_expr='attribute_not_exists(sk)',
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)
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if cert_exp_interval:
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transact.put(
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item={
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'id': id,
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'sk': 'SCHEDULE#REMINDER_CERT_EXPIRATION_BEFORE_30_DAYS',
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'ttl': cert_expiration_reminder_ttl,
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'created_at': now_,
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}
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)
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transact.put(
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item={
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'id': id,
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'sk': 'SCHEDULE#SET_AS_ARCHIVED',
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'ttl': archive_ttl,
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'created_at': now_,
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}
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)
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transact.put(
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item={
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'id': id,
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'sk': 'LOCK',
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'ttl': deduplication_lock_ttl,
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'hash': lock_hash,
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'created_at': now_,
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}
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)
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transact.put(
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item={
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'id': 'LOCK',
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'sk': lock_hash,
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'enrollment_id': id,
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'ttl': deduplication_lock_ttl,
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'created_at': now_,
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}
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)
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# Remove reminders and policies that no longer apply
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transact.delete(
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key=KeyPair(
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pk=id,
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sk='CANCEL_POLICY',
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)
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)
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transact.delete(
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key=KeyPair(
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pk=id,
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sk='SCHEDULE#SET_AS_EXPIRED',
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)
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)
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transact.delete(
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key=KeyPair(
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pk=id,
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sk='SCHEDULE#REMINDER_NO_ACTIVITY_AFTER_7_DAYS',
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)
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)
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transact.delete(
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key=KeyPair(
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pk=id,
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sk='SCHEDULE#REMINDER_ACCESS_PERIOD_BEFORE_30_DAYS',
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)
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)
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return True
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def _set_status_as_failed(
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id: str,
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/,
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score: Decimal,
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progress: Decimal,
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user_id: str,
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course_id: str,
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*,
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dynamodb_persistence_layer: DynamoDBPersistenceLayer,
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) -> bool:
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now_ = now()
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lock_hash = md5_hash(f'{user_id}{course_id}')
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with dynamodb_persistence_layer.transact_writer() as transact:
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transact.update(
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key=KeyPair(pk=id, sk='0'),
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update_expr='SET #status = :failed, progress = :progress, \
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score = :score, updated_at = :updated_at',
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cond_expr='#status = :in_progress',
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expr_attr_names={'#status': 'status'},
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expr_attr_values={
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':failed': 'FAILED',
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':in_progress': 'IN_PROGRESS',
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':score': score,
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':progress': progress,
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':updated_at': now_,
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},
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exc_cls=EnrollmentConflictError,
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)
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transact.put(
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item={
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'id': id,
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'sk': 'FAILED',
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'failed_at': now_,
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},
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cond_expr='attribute_not_exists(sk)',
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)
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# Remove reminders and events that no longer apply
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transact.delete(
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key=KeyPair(
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pk=id,
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sk='CANCEL_POLICY',
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)
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)
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transact.delete(
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key=KeyPair(
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pk=id,
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sk='SCHEDULE#SET_AS_EXPIRED',
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)
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)
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transact.delete(
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key=KeyPair(
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pk=id,
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sk='SCHEDULE#REMINDER_NO_ACTIVITY_AFTER_7_DAYS',
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)
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)
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transact.delete(
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key=KeyPair(
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pk=id,
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sk='SCHEDULE#REMINDER_ACCESS_PERIOD_BEFORE_30_DAYS',
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)
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)
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# Remove locks related to this enrollment
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transact.delete(
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key=KeyPair(pk=id, sk='LOCK'),
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)
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transact.delete(
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key=KeyPair(pk='LOCK', sk=lock_hash),
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)
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return True
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def _set_status_as_archived(
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id: str,
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*,
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dynamodb_persistence_layer: DynamoDBPersistenceLayer,
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):
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now_ = now()
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with dynamodb_persistence_layer.transact_writer() as transact:
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transact.update(
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key=KeyPair(pk=id, sk='0'),
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update_expr='SET #status = :archived, updated_at = :updated_at',
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cond_expr='#status = :completed',
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expr_attr_names={'#status': 'status'},
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expr_attr_values={
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':archived': 'ARCHIVED',
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':completed': 'COMPLETED',
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':updated_at': now_,
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},
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exc_cls=EnrollmentConflictError,
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)
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transact.put(
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item={
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'id': id,
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'sk': 'ARCHIVED',
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'archived_at': now_,
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},
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cond_expr='attribute_not_exists(sk)',
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)
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# Remove events that no longer apply
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transact.delete(
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key=KeyPair(
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pk=id,
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sk='SCHEDULE#SET_AS_ARCHIVED',
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)
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)
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return True
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def _set_status_as_expired(
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id: str,
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*,
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dynamodb_persistence_layer: DynamoDBPersistenceLayer,
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):
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now_ = now()
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with dynamodb_persistence_layer.transact_writer() as transact:
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transact.update(
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key=KeyPair(pk=id, sk='0'),
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update_expr='SET #status = :expired, updated_at = :updated_at',
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cond_expr='#status = :in_progress OR #status = :pending',
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expr_attr_names={
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'#status': 'status',
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},
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expr_attr_values={
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':pending': 'PENDING',
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':in_progress': 'IN_PROGRESS',
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':expired': 'EXPIRED',
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':updated_at': now_,
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},
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exc_cls=EnrollmentConflictError,
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)
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transact.put(
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item={
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'id': id,
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'sk': 'EXPIRED',
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'expired_at': now_,
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},
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cond_expr='attribute_not_exists(sk)',
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)
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# Remove events and policies that no longer apply
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transact.delete(
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key=KeyPair(
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pk=id,
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sk='CANCEL_POLICY',
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),
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)
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transact.delete(
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key=KeyPair(
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pk=id,
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sk='SCHEDULE#SET_AS_EXPIRED',
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)
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)
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class EnrollmentNotFoundError(NotFoundError):
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def __init__(self, *_):
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super().__init__('Enrollment not found')
|
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|
|
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class EnrollmentConflictError(BadRequestError):
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def __init__(self, *_):
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super().__init__('Enrollment status conflict')
|