Add example for use with Geo feature

lib/nerves_hub_web/channels/device_channel.ex

@@ -458,19 +458,9 @@ defmodule NervesHubWeb.DeviceChannel do
     end
   end
 
-  def handle_in("location:update", location, %{assigns: %{device: device}} = socket) do
-    metadata = Map.put(device.connection_metadata, "location", location)
-
-    {:ok, device} = Devices.update_device(device, %{connection_metadata: metadata})
-
-    _ =
-      NervesHubWeb.DeviceEndpoint.broadcast(
-        "device:#{device.identifier}:internal",
-        "location:updated",
-        location
-      )
-
-    {:reply, :ok, assign(socket, :device, device)}
+  def handle_in("location:update", location, socket) do
+    # Backwards compatibility for Geo feature
+    NervesHubWeb.FeaturesChannel.handle_in("geo:location:update", location, socket)
   end
 
   def handle_in("connection_types", %{"values" => types}, %{assigns: %{device: device}} = socket) do

lib/nerves_hub_web/channels/features_channel.ex

@@ -2,6 +2,7 @@ defmodule NervesHubWeb.FeaturesChannel do
   use Phoenix.Channel
 
   alias Phoenix.Socket.Broadcast
+  alias NervesHub.Devices
 
   @impl Phoenix.Channel
   def join("features", payload, socket) do
@@ -22,6 +23,21 @@ defmodule NervesHubWeb.FeaturesChannel do
   end
 
   @impl Phoenix.Channel
+  def handle_in("geo:location:update", location, %{assigns: %{device: device}} = socket) do
+    metadata = Map.put(device.connection_metadata, "location", location)
+
+    {:ok, device} = Devices.update_device(device, %{connection_metadata: metadata})
+
+    _ =
+      NervesHubWeb.DeviceEndpoint.broadcast(
+        "device:#{device.identifier}:internal",
+        "location:updated",
+        location
+      )
+
+    {:noreply, assign(socket, :device, device)}
+  end
+
   def handle_in(event, payload, socket) do
     dbg({event, payload})
     {:noreply, socket}