Add diagnostic platform and tests to Blink (#102650)

Co-authored-by: J. Nick Koston <nick@koston.org>

homeassistant/components/blink/diagnostics.py

@@ -0,0 +1,33 @@
+"""Diagnostics support for Blink."""
+from __future__ import annotations
+
+from typing import Any
+
+from blinkpy.blinkpy import Blink
+
+from homeassistant.components.diagnostics import async_redact_data
+from homeassistant.config_entries import ConfigEntry
+from homeassistant.core import HomeAssistant
+
+from .const import DOMAIN
+
+TO_REDACT = {"serial", "macaddress", "username", "password", "token"}
+
+
+async def async_get_config_entry_diagnostics(
+    hass: HomeAssistant,
+    config_entry: ConfigEntry,
+) -> dict[str, Any]:
+    """Return diagnostics for a config entry."""
+
+    api: Blink = hass.data[DOMAIN][config_entry.entry_id].api
+
+    data = {
+        camera.name: dict(camera.attributes.items())
+        for _, camera in api.cameras.items()
+    }
+
+    return {
+        "config_entry": async_redact_data(config_entry.as_dict(), TO_REDACT),
+        "cameras": async_redact_data(data, TO_REDACT),
+    }