anti
48f486ac97
- Core Telegram monitoring pipeline (scraper, processor, notifier, downloaders) - Textual TUI frontend with thread-safe event bus - SQLite persistence, severity scoring, dedup cache - Fixed ULP parser: handles https:// truncation, port+path URLs, semicolon separator - Test suite: 88 tests across scorer, cache, database, processor
67 lines
2.6 KiB
Markdown
67 lines
2.6 KiB
Markdown
# tui/events.py
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Thread-safe event bus between the bot backend thread and the Textual TUI.
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The bot thread calls `post()`. The TUI drains the queue every 100ms via `_drain_bus()`.
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## Public API
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```python
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from tui import events as bus # from core/ and tui/app.py
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from tui.events import post, init_bus, get_bus, tui_active
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```
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### `init_bus() -> queue.Queue`
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Creates the `queue.Queue`. Called inside `MonitorApp.on_mount()` — **must run on Textual's event loop**, not before `App.run()`.
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### `post(event: Any) -> None`
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Fire-and-forget from any thread. Silently drops if bus not initialised.
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Uses `queue.Queue.put_nowait()` — never blocks.
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### `get_bus() -> queue.Queue | None`
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Returns the queue for the TUI consumer to drain.
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### `tui_active: bool`
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Set to `True` by `init_bus()`. Checked by `core/tdl_downloader.py` to decide whether to pipe tdl output or inherit the terminal.
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---
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## Event types
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| Class | Fields | Posted by | Consumed by |
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|-------|--------|-----------|-------------|
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| `EvDownloadQueued` | `batch_id, filename, size_mb, source, password` | `tdl_downloader`, `scraper` | `DownloadPanel.queued()` |
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| `EvDownloadStarted` | `batch_id, filename` | `tdl_downloader`, `scraper` | `DownloadPanel.status("downloading")` |
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| `EvDownloadDone` | `batch_id, filename, via` | `tdl_downloader`, `scraper` | `DownloadPanel.status("done_tdl"\|"done_tel")` |
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| `EvDownloadFailed` | `batch_id, filename, reason` | `tdl_downloader`, `scraper` | `DownloadPanel.status("failed")` |
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| `EvTdlOutput` | `line` | `tdl_downloader._relay()` | `DownloadPanel.tdl_line()` |
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| `EvHit` | `severity, raw, source, filename, reasons` | `notifier.notify()` | `HitsPanel.add_hit()` + `StatsPanel.refresh_stats()` |
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| `EvChannelAdded` | `channel` | `ChannelPanel.on_button_pressed()` | `_drain_bus` → `_signal_channel_changed()` |
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| `EvChannelRemoved` | `channel` | `ChannelPanel.on_button_pressed()` | `_drain_bus` → `_signal_channel_changed()` |
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| `EvStatus` | `text, level` | everywhere | `MonitorApp.notify()` toast |
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`level` on `EvStatus`: `"info"` (default) · `"warning"` · `"error"`
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---
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## Threading model
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```
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Bot thread (own asyncio loop)
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└─ bus.post(event) ← queue.Queue.put_nowait() [thread-safe]
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↓
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queue.Queue
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↓
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Textual thread (Textual's loop)
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└─ _drain_bus() [set_interval 100ms]
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└─ q.get_nowait() loop
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└─ dispatch to widgets [safe, same thread as Textual]
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```
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Channel changes flow the other way:
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```
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_drain_bus sees EvChannelAdded/Removed
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→ _signal_channel_changed()
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→ loop.call_soon_threadsafe(asyncio.Event.set)
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→ bot thread's _watch_channels() wakes
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```
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