dashboard: Break apart dashboard into separate modules (#5764)

* Break apart dashboard into seperate modules

* reduce code change

* late imports

* late imports

* preen

* remove accidental changes

* save the file

esphome/dashboard/status/ping.py

@@ -0,0 +1,57 @@
+from __future__ import annotations
+
+import asyncio
+import os
+from typing import cast
+
+from ..core import DASHBOARD
+from ..entries import DashboardEntry
+from ..core import list_dashboard_entries
+from ..util import chunked
+
+
+async def _async_ping_host(host: str) -> bool:
+    """Ping a host."""
+    ping_command = ["ping", "-n" if os.name == "nt" else "-c", "1"]
+    process = await asyncio.create_subprocess_exec(
+        *ping_command,
+        host,
+        stdin=asyncio.subprocess.DEVNULL,
+        stdout=asyncio.subprocess.DEVNULL,
+        stderr=asyncio.subprocess.DEVNULL,
+        close_fds=False,
+    )
+    await process.wait()
+    return process.returncode == 0
+
+
+class PingStatus:
+    def __init__(self) -> None:
+        """Initialize the PingStatus class."""
+        super().__init__()
+        self._loop = asyncio.get_running_loop()
+
+    async def async_run(self) -> None:
+        """Run the ping status."""
+        dashboard = DASHBOARD
+
+        while not dashboard.stop_event.is_set():
+            # Only ping if the dashboard is open
+            await dashboard.ping_request.wait()
+            dashboard.ping_result.clear()
+            entries = await self._loop.run_in_executor(None, list_dashboard_entries)
+            to_ping: list[DashboardEntry] = [
+                entry for entry in entries if entry.address is not None
+            ]
+            for ping_group in chunked(to_ping, 16):
+                ping_group = cast(list[DashboardEntry], ping_group)
+                results = await asyncio.gather(
+                    *(_async_ping_host(entry.address) for entry in ping_group),
+                    return_exceptions=True,
+                )
+                for entry, result in zip(ping_group, results):
+                    if isinstance(result, Exception):
+                        result = False
+                    elif isinstance(result, BaseException):
+                        raise result
+                    dashboard.ping_result[entry.filename] = result