selfprivacy-rest-api/selfprivacy_api/backup/tasks.py

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"""
The tasks module contains the worker tasks that are used to back up and restore
"""
from datetime import datetime, timezone
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from selfprivacy_api.graphql.common_types.backup import (
RestoreStrategy,
BackupReason,
)
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from selfprivacy_api.models.backup.snapshot import Snapshot
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from selfprivacy_api.utils.huey import huey
from huey import crontab
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from selfprivacy_api.services.service import Service
from selfprivacy_api.services import get_service_by_id
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from selfprivacy_api.backup import Backups
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from selfprivacy_api.jobs import Jobs, JobStatus, Job
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SNAPSHOT_CACHE_TTL_HOURS = 6
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def validate_datetime(dt: datetime) -> bool:
"""
Validates that it is time to back up.
Also ensures that the timezone-aware time is used.
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"""
if dt.tzinfo is None:
return Backups.is_time_to_backup(dt.replace(tzinfo=timezone.utc))
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return Backups.is_time_to_backup(dt)
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# huey tasks need to return something
@huey.task()
def start_backup(service_id: str, reason: BackupReason = BackupReason.EXPLICIT) -> bool:
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"""
The worker task that starts the backup process.
"""
service = get_service_by_id(service_id)
if service is None:
raise ValueError(f"No such service: {service_id}")
Backups.back_up(service, reason)
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return True
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@huey.task()
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def prune_autobackup_snapshots(job: Job) -> bool:
"""
Remove all autobackup snapshots that do not fit into quotas set
"""
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Jobs.update(job, JobStatus.RUNNING)
try:
Backups.prune_all_autosnaps()
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except Exception as e:
Jobs.update(job, JobStatus.ERROR, error=type(e).__name__ + ":" + str(e))
return False
Jobs.update(job, JobStatus.FINISHED)
return True
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@huey.task()
def restore_snapshot(
snapshot: Snapshot,
strategy: RestoreStrategy = RestoreStrategy.DOWNLOAD_VERIFY_OVERWRITE,
) -> bool:
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"""
The worker task that starts the restore process.
"""
Backups.restore_snapshot(snapshot, strategy)
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return True
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@huey.periodic_task(validate_datetime=validate_datetime)
def automatic_backup():
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"""
The worker periodic task that starts the automatic backup process.
"""
time = datetime.utcnow().replace(tzinfo=timezone.utc)
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for service in Backups.services_to_back_up(time):
start_backup(service, BackupReason.AUTO)
@huey.periodic_task(crontab(hour=SNAPSHOT_CACHE_TTL_HOURS))
def reload_snapshot_cache():
Backups.force_snapshot_cache_reload()