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.
System Event Logging:
- Add SystemEvent model with 15 event types tracking channel operations, client connections, M3U/EPG activities, and buffering events
- Log detailed metrics for M3U/EPG refresh operations (streams/programs created/updated/deleted)
- Track M3U/EPG downloads with client information (IP address, user agent, profile, channel count)
- Record channel lifecycle events (start, stop, reconnect) with stream and client details
- Monitor client connections/disconnections and buffering events with stream metadata
Event Viewer UI:
- Add SystemEvents component with real-time updates via WebSocket
- Implement pagination, filtering by event type, and configurable auto-refresh
- Display events with color-coded badges and type-specific icons
- Integrate event viewer into Stats page with modal display
- Add event management settings (retention period, refresh rate)
M3U/EPG Endpoint Optimizations:
- Implement content caching with 5-minute TTL to reduce duplicate processing
- Add client-based event deduplication (2-second window) using IP and user agent hashing
- Support HEAD requests for efficient preflight checks
- Cache streamed EPG responses while maintaining streaming behavior for first request
This enhancement introduces a powerful custom dummy EPG system that allows users to generate EPG programs on-demand by parsing channel or stream names using configurable regex patterns.
Key Features:
- Custom Pattern Matching: Define regex patterns to extract information from channel/stream names (teams, leagues, times, dates, etc.)
- Flexible Name Source: Choose to parse either the channel name or a specific stream name (by index)
- Timezone-Aware Scheduling: Automatic DST handling using pytz timezone names (e.g., 'US/Eastern', 'Europe/London')
- Time Format Support: Parse both 12-hour (AM/PM) and 24-hour time formats
- Date Parsing: Extract dates from names with flexible month/day/year patterns
- Custom Templates: Format EPG titles and descriptions using captured groups with {placeholder} syntax
- Upcoming/Ended Customization: Define custom titles and descriptions for programs before and after scheduled events
- Live Preview: Test patterns and templates in real-time with sample input
- Smart Program Generation: Automatically creates "Upcoming" and "Ended" programs around scheduled events
Use Cases:
- Sports channels with event details in stream names (e.g., "NHL 01: Bruins VS Leafs @ 8:00PM ET")
- Movie channels with genre/title/year information
- Racing events with driver/track/series details
- Any scenario where EPG data is embedded in channel/stream naming conventions
Technical Implementation:
- Backend: Pattern matching engine with timezone conversion and program scheduling logic
- Frontend: Interactive form with validation, pattern testing, and visual group preview
- Name Source Options: Parse from channel name or selectable stream index (1-based)
- Fallback Behavior: Uses standard dummy EPG if patterns don't match
- Custom Properties: Stores all configuration in EPGSource.custom_properties JSON field
Configuration Options:
- Title Pattern: Extract primary information (required)
- Time Pattern: Extract hour/minute/AM-PM (optional)
- Date Pattern: Extract month/day/year (optional)
- Timezone: Event timezone with automatic DST support
- Program Duration: Length of generated programs in minutes
- Title Template: Format EPG title using captured groups
- Description Template: Format EPG description using captured groups
- Upcoming Title Template: Custom title for programs before event starts (optional)
- Upcoming Description Template: Custom description for programs before event starts (optional)
- Ended Title Template: Custom title for programs after event ends (optional)
- Ended Description Template: Custom description for programs after event ends (optional)
- Name Source: Channel name or stream name
- Stream Index: Which stream to use when parsing stream names (1, 2, 3, etc.)
Closes#293
