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from plugin.core.backup.constants import BACKUP_NAME_REGEX, BACKUP_PATH, BACKUP_PERIODS, BACKUP_RETENTION |
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from plugin.core.backup.models import BackupGroup, BackupRevision |
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from plugin.core.backup.tasks import ArchiveTask, CompactTask |
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from plugin.core.helpers.variable import try_convert |
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from datetime import datetime |
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from fnmatch import fnmatch |
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import logging |
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import os |
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log = logging.getLogger(__name__) |
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class BackupMaintenanceManager(object): |
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def __init__(self): |
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self.now = datetime.now() |
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def run(self): |
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# Run maintenance on backup groups |
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for group in BackupGroup.list(max_depth=1): |
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self.process_group(group) |
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# |
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# Process methods |
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# |
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def process_group(self, group): |
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log.debug('Running maintenance on group: %r', group) |
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# Process policy periods |
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for period in BACKUP_PERIODS: |
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self.process_period(period, group) |
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def process_period(self, period, group): |
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policy = BACKUP_RETENTION[period] |
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# Retrieve options |
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p_files = policy.get('files') |
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if p_files is None: |
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raise ValueError('Policy "%s" is missing the "files" attribute') |
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# Build lists of revisions, grouped by period |
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revisions_grouped = {} |
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for base_path, dirs, files in os.walk(group.path): |
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# Strip UNC prefix from `base_path` |
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if base_path.startswith('\\\\?\\'): |
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base_path = base_path[4:] |
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# Ensure directory starts with a year |
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rel_path = os.path.relpath(base_path, group.path) |
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try: |
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year = rel_path[:rel_path.index(os.path.sep)] |
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except ValueError: |
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year = rel_path |
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if len(year) != 4 or try_convert(year, int) is None: |
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continue |
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# Search for revision metadata files |
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for name in files: |
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# Ensure file name matches the policy "files" filter |
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if not fnmatch(name, p_files): |
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continue |
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# Build path |
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path = os.path.join(base_path, name) |
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# Match revision metadata against regex pattern |
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if not BACKUP_NAME_REGEX.match(name): |
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continue |
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# Load metadata from file |
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try: |
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revision = BackupRevision.load(path) |
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except Exception, ex: |
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log.warn('Unable to load revision at %r: %s', path, ex, exc_info=True) |
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continue |
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# Retrieve timestamp period |
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key = self.timestamp_period(period, revision.timestamp) |
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if key == self.timestamp_period(period, self.now): |
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# Backup occurred in the current period |
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continue |
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# Store details in `revisions_grouped` dictionary |
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if key not in revisions_grouped: |
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revisions_grouped[key] = [] |
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revisions_grouped[key].append(revision) |
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# Ensure revisions have been found |
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if not revisions_grouped: |
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return |
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log.debug('Processing period: %r (group: %r)', period, group) |
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# Search for weeks exceeding the policy |
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for key, revisions in revisions_grouped.items(): |
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# Compact period |
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if policy.get('compact'): |
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CompactTask.run(period, key, revisions, policy['compact']) |
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# Archive revisions (if enabled) |
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if policy.get('archive'): |
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ArchiveTask.run(group, period, key, revisions, policy['archive']) |
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log.debug('Done') |
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# |
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# Helpers |
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# |
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@staticmethod |
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def timestamp_period(period, timestamp): |
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if period == 'day': |
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return timestamp.date() |
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if period == 'week': |
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return tuple(timestamp.isocalendar()[:2]) |
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if period == 'month': |
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return timestamp.year, timestamp.month |
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if period == 'year': |
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return timestamp.year, |
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raise ValueError('Unknown period: %r' % period) |
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fuzeman /
Plex-Trakt-Scrobbler
