Add diagnostics to Advantage Air (#65006)

Co-authored-by: Joakim Sørensen <hi@ludeeus.dev>

.coveragerc

@@ -27,6 +27,7 @@ omit =
     homeassistant/components/adguard/sensor.py
     homeassistant/components/adguard/switch.py
     homeassistant/components/ads/*
+    homeassistant/components/advantage_air/diagnostics.py
     homeassistant/components/aemet/weather_update_coordinator.py
     homeassistant/components/aftership/*
     homeassistant/components/agent_dvr/alarm_control_panel.py

homeassistant/components/advantage_air/diagnostics.py

@@ -0,0 +1,25 @@
+"""Provides diagnostics for Advantage Air."""
+from __future__ import annotations
+
+from typing import Any
+
+from homeassistant.components.diagnostics import async_redact_data
+from homeassistant.config_entries import ConfigEntry
+from homeassistant.core import HomeAssistant
+
+from .const import DOMAIN as ADVANTAGE_AIR_DOMAIN
+
+TO_REDACT = ["dealerPhoneNumber", "latitude", "logoPIN", "longitude", "postCode"]
+
+
+async def async_get_config_entry_diagnostics(
+    hass: HomeAssistant, config_entry: ConfigEntry
+) -> dict[str, Any]:
+    """Return diagnostics for a config entry."""
+    data = hass.data[ADVANTAGE_AIR_DOMAIN][config_entry.entry_id]["coordinator"].data
+
+    # Return only the relevant children
+    return {
+        "aircons": data["aircons"],
+        "system": async_redact_data(data["system"], TO_REDACT),
+    }