The list_backups function was creating timezone-naive datetime objects,
which caused the frontend to incorrectly interpret timestamps.
Now uses datetime.UTC when creating timestamps from file modification time
(consistent with other usage in this file on lines 186, 216), so the ISO
string includes timezone info (+00:00). This allows the browser to properly
convert UTC timestamps to the user's local timezone for display.
Before: Backend sends "2025-12-09T14:12:44" (ambiguous timezone)
After: Backend sends "2025-12-09T14:12:44+00:00" (explicit UTC)
The frontend's toLocaleString() will now correctly convert to local time.
- Add validateCronExpression function with comprehensive validation:
- Checks for exactly 5 parts (minute hour day month weekday)
- Validates cron syntax (*, ranges, lists, steps)
- Validates numeric ranges (minute 0-59, hour 0-23, etc.)
- Returns detailed error messages for each validation failure
- Add cronError state to track validation errors
- Validate on input change with handleScheduleChange
- Display error message below input field
- Disable Save button when cron expression is invalid
- Auto-validate when switching to advanced mode
- Clear errors when switching back to simple mode
User gets immediate feedback on cron syntax errors before attempting to save.
Frontend changes:
- Add advanced mode toggle switch for cron expressions
- Show cron expression input with helpful examples when enabled
- Display format hints: "minute hour day month weekday"
- Provide common examples (daily, weekly, every 6 hours, etc.)
- Conditionally render simple or advanced scheduling UI
- Support switching between simple and advanced modes
Backend changes:
- Add cron_expression to schedule settings (SETTING_KEYS, DEFAULTS)
- Update get_schedule_settings to include cron_expression
- Update update_schedule_settings to handle cron_expression
- Extend _sync_periodic_task to parse and use cron expressions
- Parse 5-part cron format: minute hour day_of_month month_of_year day_of_week
- Create CrontabSchedule from cron expression or simple frequency
- Add validation and error handling for invalid cron expressions
This addresses maintainer feedback for "custom scheduler (cron style) for more control".
Users can now schedule backups with full cron flexibility beyond daily/weekly.
- Add timezone conversion functions (utcToLocal, localToUtc)
- Use user's configured timezone from Settings (localStorage 'time-zone')
- Convert times to UTC when saving to backend
- Convert times from UTC to local when loading from backend
- Display timezone info showing user's timezone and scheduled time
- Helper text shows: "Timezone: America/New_York • Backup will run at 03:00"
This addresses maintainer feedback to handle timezone properly:
backend stores/schedules in UTC, frontend displays/edits in user's local time.
- Import useWarningsStore from warnings store
- Add suppressWarning hook to component
- Add actionKey props to restore and delete confirmation dialogs
- Add onSuppressChange callback to enable "Don't ask again" functionality
This aligns BackupManager with the project's standard confirmation dialog pattern
used throughout the codebase (ChannelsTable, EPGsTable, etc).
Dramatically improve EPG refresh performance by parsing the XML file once
per source instead of once per channel. The new implementation:
- Pre-filters to only process EPG entries mapped to actual channels
- Parses the entire XML file in a single pass
- Uses O(1) set lookups to skip unmapped channel programmes
- Skips non-mapped channels entirely with minimal overhead
For EPG sources with many channels but few mapped (e.g., 10,000 channels
with 100 mapped to channels), this provides approximately:
- 99% reduction in file open operations
- 99% reduction in XML file scans
- Proportional reduction in CPU and I/O overhead
The parse_programs_for_tvg_id() function is retained for single-channel
use cases (e.g., when a new channel is mapped via signals).
Fixes inefficient repeated file parsing that was occurring with large
EPG sources.
- Simplify to database-only backups (remove data directory backup)
- Update UI to match app styling patterns:
- Use ActionIcon with transparent variant for table actions
- Match icon/color conventions (SquareMinus/red.9, RotateCcw/yellow.5, Download/blue.5)
- Use standard button bar layout with Paper/Box/Flex
- Green "Create Backup" button matching "Add" pattern
- Remove Card wrapper, Alert, and Divider for cleaner layout
- Update to Mantine v8 Table syntax
- Use standard ConfirmationDialog (remove unused color prop)
- Update tests to remove get_data_dirs references
