Rename stream_type to frontend_stream_type (#57923)

Camera devices may support multiple stream sources so we want to clarify that
this is meant to decide which stream source is used in the frontend only.

Will set stream_type temporarily to allow rollout without breaking nightly,
and this will be removed after frontend is updated.

homeassistant/components/camera/__init__.py

@@ -422,7 +422,7 @@ class Camera(Entity):
         return MIN_STREAM_INTERVAL
 
     @property
-    def stream_type(self) -> str | None:
+    def frontend_stream_type(self) -> str | None:
         """Return the type of stream supported by this camera.
 
         A camera may have a single stream type which is used to inform the
@@ -570,8 +570,10 @@ class Camera(Entity):
         if self.motion_detection_enabled:
             attrs["motion_detection"] = self.motion_detection_enabled
 
-        if self.stream_type:
-            attrs["stream_type"] = self.stream_type
+        if self.frontend_stream_type:
+            attrs["frontend_stream_type"] = self.frontend_stream_type
+            # Remove after home-assistant/frontend#10298 is merged into nightly
+            attrs["stream_type"] = self.frontend_stream_type
 
         return attrs
 
@@ -746,11 +748,11 @@ async def ws_camera_web_rtc_offer(
     entity_id = msg["entity_id"]
     offer = msg["offer"]
     camera = _get_camera_from_entity_id(hass, entity_id)
-    if camera.stream_type != STREAM_TYPE_WEB_RTC:
+    if camera.frontend_stream_type != STREAM_TYPE_WEB_RTC:
         connection.send_error(
             msg["id"],
             "web_rtc_offer_failed",
-            f"Camera does not support WebRTC, stream_type={camera.stream_type}",
+            f"Camera does not support WebRTC, frontend_stream_type={camera.frontend_stream_type}",
         )
         return
     try:

homeassistant/components/nest/camera_sdm.py

@@ -118,7 +118,7 @@ class NestCamera(Camera):
         return supported_features
 
     @property
-    def stream_type(self) -> str | None:
+    def frontend_stream_type(self) -> str | None:
         """Return the type of stream supported by this camera."""
         if CameraLiveStreamTrait.NAME not in self._device.traits:
             return None
@@ -131,9 +131,11 @@ class NestCamera(Camera):
         """Return the source of the stream."""
         if not self.supported_features & SUPPORT_STREAM:
             return None
-        if self.stream_type != STREAM_TYPE_HLS:
+        if CameraLiveStreamTrait.NAME not in self._device.traits:
             return None
         trait = self._device.traits[CameraLiveStreamTrait.NAME]
+        if StreamingProtocol.RTSP not in trait.supported_protocols:
+            return None
         if not self._stream:
             _LOGGER.debug("Fetching stream url")
             try:

tests/components/camera/test_init.py

@@ -53,7 +53,7 @@ async def mock_camera_web_rtc_fixture(hass):
     await hass.async_block_till_done()
 
     with patch(
-        "homeassistant.components.camera.Camera.stream_type",
+        "homeassistant.components.camera.Camera.frontend_stream_type",
         new_callable=PropertyMock(return_value=STREAM_TYPE_WEB_RTC),
     ), patch(
         "homeassistant.components.camera.Camera.async_handle_web_rtc_offer",