app: wire mumble connection, text chat, channel tree

Connect to server on mount via @work(thread=True). Bridge pymumble
callbacks to Textual messages (ServerConnected, ServerDisconnected,
TextMessageReceived, ServerStateChanged). Render live channel/user
tree recursively. Send text on input submit. Clean disconnect on quit.

src/tuimble/app.py

@@ -2,21 +2,56 @@
 
 from __future__ import annotations
 
-from textual import events
+import html
+import logging
+
+from textual import events, on, work
 from textual.app import App, ComposeResult
 from textual.containers import Horizontal, Vertical
+from textual.message import Message
 from textual.reactive import reactive
 from textual.widgets import Footer, Header, Input, RichLog, Static
 
+from tuimble.client import Channel, MumbleClient
 from tuimble.config import Config, load_config
 from tuimble.ptt import KittyPtt, TogglePtt, detect_backend
 
+log = logging.getLogger(__name__)
+
+
+# -- custom messages (pymumble thread -> Textual) ----------------------------
+
+
+class ServerConnected(Message):
+    pass
+
+
+class ServerDisconnected(Message):
+    pass
+
+
+class TextMessageReceived(Message):
+    def __init__(self, sender: str, text: str) -> None:
+        super().__init__()
+        self.sender = sender
+        self.text = text
+
+
+class ServerStateChanged(Message):
+    """Channel or user list changed on the server."""
+
+    pass
+
+
+# -- widgets -----------------------------------------------------------------
+
 
 class StatusBar(Static):
     """Connection and PTT status indicator."""
 
     ptt_active = reactive(False)
     connected = reactive(False)
+    server_info = reactive("")
 
     def render(self) -> str:
         if self.connected:
@@ -27,14 +62,91 @@ class StatusBar(Static):
             ptt = "[#e0af68]\u25cf[/] TX"
         else:
             ptt = "[#565f89]\u25cb[/] idle"
-        return f" {conn}  {ptt}"
+        info = f"  [dim]{self.server_info}[/]" if self.server_info else ""
+        return f" {conn}  {ptt}{info}"
 
 
 class ChannelTree(Static):
     """Channel and user list."""
 
+    def __init__(self, **kwargs) -> None:
+        super().__init__(**kwargs)
+        self._channels: dict[int, Channel] = {}
+        self._users_by_channel: dict[int, list[str]] = {}
+
+    def set_state(
+        self,
+        channels: dict[int, Channel],
+        users_by_channel: dict[int, list[str]],
+    ) -> None:
+        self._channels = channels
+        self._users_by_channel = users_by_channel
+        self.refresh()
+
+    def clear_state(self) -> None:
+        self._channels = {}
+        self._users_by_channel = {}
+        self.refresh()
+
     def render(self) -> str:
-        return " Channels\n [dim]\u2514\u2500 (not connected)[/]"
+        if not self._channels:
+            return " Channels\n [dim]\u2514\u2500 (not connected)[/]"
+
+        lines = [" [bold]Channels[/]"]
+        root_id = self._find_root()
+        self._render_tree(root_id, lines, indent=1, is_last=True)
+        return "\n".join(lines)
+
+    def _find_root(self) -> int:
+        for cid, ch in self._channels.items():
+            if ch.parent_id == -1 or cid == 0:
+                return cid
+        return min(self._channels) if self._channels else 0
+
+    def _render_tree(
+        self,
+        channel_id: int,
+        lines: list[str],
+        indent: int,
+        is_last: bool,
+    ) -> None:
+        ch = self._channels.get(channel_id)
+        if ch is None:
+            return
+
+        prefix = " " * indent
+        branch = "\u2514\u2500" if is_last else "\u251c\u2500"
+        lines.append(f"{prefix}{branch} [bold]{ch.name}[/]")
+
+        users = self._users_by_channel.get(channel_id, [])
+        children = [
+            c
+            for c in sorted(self._channels.values(), key=lambda c: c.name)
+            if c.parent_id == channel_id and c.channel_id != channel_id
+        ]
+
+        sub_prefix = " " * (indent + 2)
+        for i, user_name in enumerate(users):
+            is_last_item = i == len(users) - 1 and not children
+            bullet = "\u2514\u2500" if is_last_item else "\u251c\u2500"
+            lines.append(f"{sub_prefix}{bullet} [#7aa2f7]{user_name}[/]")
+
+        for i, child in enumerate(children):
+            self._render_tree(
+                child.channel_id,
+                lines,
+                indent + 2,
+                is_last=i == len(children) - 1,
+            )
+
+
+class ChatLog(RichLog):
+    """Message log."""
+
+    pass
+
+
+# -- main app ----------------------------------------------------------------
 
 
 class TuimbleApp(App):
@@ -91,6 +203,13 @@ class TuimbleApp(App):
         self._ptt = detect_backend(
             self._on_ptt_change, self._config.ptt.backend
         )
+        srv = self._config.server
+        self._client = MumbleClient(
+            host=srv.host,
+            port=srv.port,
+            username=srv.username,
+            password=srv.password,
+        )
 
     def compose(self) -> ComposeResult:
         yield Header()
@@ -102,10 +221,112 @@ class TuimbleApp(App):
         yield StatusBar(id="status")
         yield Footer()
 
-    def on_mount(self):
+    def on_mount(self) -> None:
         chatlog = self.query_one("#chatlog", ChatLog)
         chatlog.write("[dim]tuimble v0.1.0[/dim]")
-        chatlog.write("[dim]press q to quit[/dim]")
+        srv = self._config.server
+        chatlog.write(f"[dim]connecting to {srv.host}:{srv.port}...[/dim]")
+        self._connect_to_server()
+
+    # -- server connection (worker thread) -----------------------------------
+
+    @work(thread=True)
+    def _connect_to_server(self) -> None:
+        self._client.set_dispatcher(self.call_from_thread)
+        self._client.on_connected = self._cb_connected
+        self._client.on_disconnected = self._cb_disconnected
+        self._client.on_text_message = self._cb_text_message
+        self._client.on_user_update = self._cb_state_changed
+        self._client.on_channel_update = self._cb_state_changed
+
+        try:
+            self._client.connect()
+        except Exception as exc:
+            self.call_from_thread(self._show_error, str(exc))
+
+    def _cb_connected(self) -> None:
+        self.post_message(ServerConnected())
+
+    def _cb_disconnected(self) -> None:
+        self.post_message(ServerDisconnected())
+
+    def _cb_text_message(self, sender: str, text: str) -> None:
+        self.post_message(TextMessageReceived(sender, text))
+
+    def _cb_state_changed(self) -> None:
+        self.post_message(ServerStateChanged())
+
+    def _show_error(self, text: str) -> None:
+        chatlog = self.query_one("#chatlog", ChatLog)
+        chatlog.write(f"[#f7768e]\u2717 {text}[/]")
+
+    # -- message handlers ----------------------------------------------------
+
+    def on_server_connected(self, _msg: ServerConnected) -> None:
+        status = self.query_one("#status", StatusBar)
+        status.connected = True
+        srv = self._config.server
+        status.server_info = f"{srv.host}:{srv.port}"
+
+        chatlog = self.query_one("#chatlog", ChatLog)
+        chatlog.write(
+            f"[#9ece6a]\u2713 connected as {self._config.server.username}[/]"
+        )
+        self._refresh_channel_tree()
+
+    def on_server_disconnected(self, _msg: ServerDisconnected) -> None:
+        status = self.query_one("#status", StatusBar)
+        status.connected = False
+        status.server_info = ""
+
+        chatlog = self.query_one("#chatlog", ChatLog)
+        chatlog.write("[#f7768e]\u2717 disconnected from server[/]")
+
+        tree = self.query_one("#sidebar", ChannelTree)
+        tree.clear_state()
+
+    def on_text_message_received(self, msg: TextMessageReceived) -> None:
+        chatlog = self.query_one("#chatlog", ChatLog)
+        # Strip HTML tags from Mumble messages
+        clean = _strip_html(msg.text)
+        chatlog.write(f"[#7aa2f7]{msg.sender}[/] {clean}")
+
+    def on_server_state_changed(self, _msg: ServerStateChanged) -> None:
+        self._refresh_channel_tree()
+
+    @on(Input.Submitted, "#input")
+    def on_input_submitted(self, event: Input.Submitted) -> None:
+        text = event.value.strip()
+        if not text:
+            return
+        event.input.clear()
+
+        if not self._client.connected:
+            self._show_error("not connected")
+            return
+
+        self._client.send_text(text)
+        chatlog = self.query_one("#chatlog", ChatLog)
+        chatlog.write(
+            f"[#e0af68]{self._config.server.username}[/] {text}"
+        )
+
+    # -- channel tree --------------------------------------------------------
+
+    def _refresh_channel_tree(self) -> None:
+        if not self._client.connected:
+            return
+        channels = self._client.channels
+        users = self._client.users
+        users_by_channel: dict[int, list[str]] = {}
+        for u in users.values():
+            users_by_channel.setdefault(u.channel_id, []).append(u.name)
+        for lst in users_by_channel.values():
+            lst.sort()
+        tree = self.query_one("#sidebar", ChannelTree)
+        tree.set_state(channels, users_by_channel)
+
+    # -- PTT -----------------------------------------------------------------
 
     def on_key(self, event: events.Key) -> None:
         """Handle PTT key events."""
@@ -122,13 +343,21 @@ class TuimbleApp(App):
             if event.key == ptt_key:
                 self._ptt.toggle()
 
-    def _on_ptt_change(self, transmitting: bool):
-        """Called when PTT state changes."""
+    def _on_ptt_change(self, transmitting: bool) -> None:
         status = self.query_one("#status", StatusBar)
         status.ptt_active = transmitting
 
+    # -- lifecycle -----------------------------------------------------------
 
-class ChatLog(RichLog):
-    """Message log."""
+    def action_quit(self) -> None:
+        self._client.set_dispatcher(None)
+        self._client.disconnect()
+        self.exit()
 
-    pass
+
+def _strip_html(text: str) -> str:
+    """Remove HTML tags and unescape entities from Mumble messages."""
+    import re
+
+    clean = re.sub(r"<[^>]+>", "", text)
+    return html.unescape(clean)