Fix image platform state for Vodafone Station (#162747)

Co-authored-by: Joostlek <joostlek@outlook.com>

homeassistant/components/vodafone_station/image.py

@@ -12,6 +12,7 @@ from homeassistant.const import EntityCategory
 from homeassistant.core import HomeAssistant
 from homeassistant.helpers.entity_platform import AddConfigEntryEntitiesCallback
 from homeassistant.helpers.update_coordinator import CoordinatorEntity
+from homeassistant.util import dt as dt_util
 
 from .const import _LOGGER
 from .coordinator import VodafoneConfigEntry, VodafoneStationRouter
@@ -75,9 +76,11 @@ class VodafoneGuestWifiQRImage(
         self.entity_description = description
         self._attr_device_info = coordinator.device_info
         self._attr_unique_id = f"{coordinator.serial_number}-{description.key}-qr-code"
+        self._cached_qr_code: bytes | None = None
 
-    async def async_image(self) -> bytes | None:
-        """Return QR code image bytes."""
+    @property
+    def _qr_code(self) -> bytes:
+        """Return QR code bytes."""
         qr_code = cast(
             BytesIO,
             self.coordinator.data.wifi[WIFI_DATA][self.entity_description.key][
@@ -85,3 +88,24 @@ class VodafoneGuestWifiQRImage(
             ],
         )
         return qr_code.getvalue()
+
+    async def async_added_to_hass(self) -> None:
+        """Set the update time."""
+        self._attr_image_last_updated = dt_util.utcnow()
+        await super().async_added_to_hass()
+
+    def _handle_coordinator_update(self) -> None:
+        """Handle updated data from the coordinator.
+
+        If the coordinator has updated the QR code, we can update the image.
+        """
+        qr_code = self._qr_code
+        if self._cached_qr_code != qr_code:
+            self._cached_qr_code = qr_code
+            self._attr_image_last_updated = dt_util.utcnow()
+
+        super()._handle_coordinator_update()
+
+    async def async_image(self) -> bytes | None:
+        """Return QR code image."""
+        return self._qr_code

tests/components/vodafone_station/snapshots/test_image.ambr

@@ -47,7 +47,7 @@
     'last_changed': <ANY>,
     'last_reported': <ANY>,
     'last_updated': <ANY>,
-    'state': 'unknown',
+    'state': '2026-01-05T15:00:00+00:00',
   })
 # ---
 # name: test_all_entities[image.vodafone_station_m123456789_guest_network-entry]
@@ -98,7 +98,7 @@
     'last_changed': <ANY>,
     'last_reported': <ANY>,
     'last_updated': <ANY>,
-    'state': 'unknown',
+    'state': '2026-01-05T15:00:00+00:00',
   })
 # ---
 # name: test_image_entity

tests/components/vodafone_station/test_image.py

@@ -15,6 +15,7 @@ from homeassistant.config_entries import ConfigEntryState
 from homeassistant.const import Platform
 from homeassistant.core import HomeAssistant
 from homeassistant.helpers import entity_registry as er
+from homeassistant.util import dt as dt_util
 
 from . import setup_integration
 from .const import TEST_SERIAL_NUMBER
@@ -39,6 +40,7 @@ async def test_all_entities(
     await snapshot_platform(hass, entity_registry, snapshot, mock_config_entry.entry_id)
 
 
+@pytest.mark.freeze_time("2023-12-02T13:00:00+00:00")
 async def test_image_entity(
     hass: HomeAssistant,
     hass_client: ClientSessionGenerator,
@@ -82,7 +84,11 @@ async def test_image_entity(
     body = await resp.read()
     assert body == snapshot
 
+    assert (state := hass.states.async_all(IMAGE_DOMAIN)[0])
+    assert state.state == "2023-12-02T13:00:00+00:00"
 
+
+@pytest.mark.freeze_time("2023-12-02T13:00:00+00:00")
 async def test_image_update(
     hass: HomeAssistant,
     hass_client: ClientSessionGenerator,
@@ -104,6 +110,9 @@ async def test_image_update(
 
     resp_body = await resp.read()
 
+    assert (state := hass.states.get(entity_id))
+    assert state.state == "2023-12-02T13:00:00+00:00"
+
     mock_vodafone_station_router.get_wifi_data.return_value = {
         WIFI_DATA: {
             "guest": {
@@ -122,6 +131,7 @@ async def test_image_update(
     freezer.tick(SCAN_INTERVAL)
     async_fire_time_changed(hass)
     await hass.async_block_till_done()
+    new_time = dt_util.utcnow()
 
     resp = await client.get(f"/api/image_proxy/{entity_id}")
     assert resp.status == HTTPStatus.OK
@@ -129,6 +139,9 @@ async def test_image_update(
     resp_body_new = await resp.read()
     assert resp_body != resp_body_new
 
+    assert (state := hass.states.get(entity_id))
+    assert state.state == new_time.isoformat()
+
 
 async def test_no_wifi_data(
     hass: HomeAssistant,