103 lines
3.0 KiB
Python
103 lines
3.0 KiB
Python
from typing import TypedDict
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from uuid import uuid4
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from layercake.dateutils import now
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from layercake.dynamodb import DynamoDBPersistenceLayer, KeyPair, TransactItems
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from settings import ORDER_TABLE
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class Author(TypedDict):
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id: str
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name: str
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class Course(TypedDict):
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id: str
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name: str
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time_in_days: int
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def set_status_as_canceled(
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id: str,
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*,
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lock_hash: str,
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author: Author,
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course: Course | None = None,
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vacancy_key: KeyPair | None = None,
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persistence_layer: DynamoDBPersistenceLayer,
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):
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"""Cancel the enrollment if there's a `cancel_policy`
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and put its vacancy back if `vacancy_key` is provided."""
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now_ = now()
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transact = TransactItems(persistence_layer.table_name)
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transact.update(
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key=KeyPair(id, '0'),
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update_expr='SET #status = :canceled, update_date = :update',
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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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':canceled': 'CANCELED',
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':update': 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': 'canceled_date',
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'author': author,
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'create_date': now_,
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},
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)
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transact.delete(
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key=KeyPair(id, 'cancel_policy'),
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cond_expr='attribute_exists(sk)',
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)
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# Remove schedules lifecycle events, referencies and locks
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transact.delete(key=KeyPair(id, 'schedules#archive_it'))
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transact.delete(key=KeyPair(id, 'schedules#no_activity'))
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transact.delete(key=KeyPair(id, 'schedules#access_period_ends'))
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transact.delete(key=KeyPair(id, 'schedules#does_not_access'))
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transact.delete(key=KeyPair(id, 'parent_vacancy'))
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transact.delete(key=KeyPair(id, 'lock'))
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transact.delete(key=KeyPair('lock', lock_hash))
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if vacancy_key and course:
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vacancy_pk, vacancy_sk = vacancy_key.values()
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org_id = vacancy_pk.removeprefix('vacancies#')
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order_id, enrollment_id = vacancy_sk.split('#')
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transact.condition(
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key=KeyPair(order_id, '0'),
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cond_expr='attribute_exists(id)',
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table_name=ORDER_TABLE,
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)
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# Put the vacancy back and assign a new ID
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transact.put(
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item={
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'id': f'vacancies#{org_id}',
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'sk': f'{order_id}#{uuid4()}',
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'course': course,
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'create_date': now_,
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},
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cond_expr='attribute_not_exists(sk)',
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)
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# Set the status of `generated_items` to `ROLLBACK` to know
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# which vacancy is available for reuse
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transact.update(
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key=KeyPair(order_id, f'generated_items#{enrollment_id}'),
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update_expr='SET #status = :status, update_date = :update',
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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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':status': 'ROLLBACK',
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':update': now_,
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},
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cond_expr='attribute_exists(sk)',
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table_name=ORDER_TABLE,
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)
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return persistence_layer.transact_write_items(transact)
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