refactor: Save last_seen_ip in database

`last_seen_ip` is contained in the Device Status but it's also received
in device connected triggers. It is now stored in the database and used
for IP based Geolocation, without requesting the device status from
Astarte each time.

Signed-off-by: Emina Muminovic <emina.muminovic@secomind.com>

Author: Emina-M

backend/lib/edgehog/devices/device/changes/initialize_from_device_status.ex

@@ -1,7 +1,7 @@
 #
 # This file is part of Edgehog.
 #
-# Copyright 2024 SECO Mind Srl
+# Copyright 2024 - 2025 SECO Mind Srl
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -22,7 +22,7 @@ defmodule Edgehog.Devices.Device.Changes.InitializeFromDeviceStatus do
   @moduledoc false
   use Ash.Resource.Change
 
-  @device_status_attributes [:last_connection, :last_disconnection, :online]
+  @device_status_attributes [:last_connection, :last_disconnection, :online, :last_seen_ip]
 
   @impl Ash.Resource.Change
   def change(changeset, _opts, _context) do

backend/lib/edgehog/devices/device/device.ex

@@ -85,7 +85,8 @@ defmodule Edgehog.Devices.Device do
         :online,
         :realm_id,
         :last_connection,
-        :last_disconnection
+        :last_disconnection,
+        :last_seen_ip
       ]
     end
 
@@ -281,7 +282,7 @@ defmodule Edgehog.Devices.Device do
     end
 
     update :from_device_status do
-      accept [:online, :last_connection, :last_disconnection]
+      accept [:online, :last_connection, :last_disconnection, :last_seen_ip]
     end
 
     update :set_led_behavior do
@@ -428,6 +429,11 @@ defmodule Edgehog.Devices.Device do
       description "The date at which the device last disconnected from Astarte."
     end
 
+    attribute :last_seen_ip, :string do
+      public? true
+      description "The IP address at which the device last connected to Astarte."
+    end
+
     attribute :serial_number, :string do
       public? true
       description "The serial number of the device."

backend/lib/edgehog/geolocation/providers/ipbase.ex

@@ -1,7 +1,7 @@
 #
 # This file is part of Edgehog.
 #
-# Copyright 2021-2024 SECO Mind Srl
+# Copyright 2021 - 2025 SECO Mind Srl
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -27,16 +27,16 @@ defmodule Edgehog.Geolocation.Providers.IPBase do
   alias Edgehog.EdgehogTeslaClient
   alias Edgehog.Geolocation.Position
 
+  @device_status_attributes [:last_connection, :last_disconnection, :last_seen_ip]
+
   @impl Edgehog.Geolocation.GeolocationProvider
   def geolocate(%Device{} = device) do
-    with {:ok, device} <- Ash.load(device, :device_status),
-         :ok <- validate_device_status_exists(device.device_status) do
+    with {:ok, device_status} <- fetch_device_status(device) do
       %{
         last_seen_ip: last_seen_ip,
         last_connection: last_connection,
         last_disconnection: last_disconnection
-      } =
-        device.device_status
+      } = device_status
 
       last_seen_timestamp =
         [last_connection, last_disconnection]
@@ -48,6 +48,26 @@ defmodule Edgehog.Geolocation.Providers.IPBase do
     end
   end
 
+  defp fetch_device_status(%Device{} = device) do
+    if uninitialized_device_status?(device) do
+      with {:ok, device_data} <- Ash.load(device, :device_status),
+           :ok <- validate_device_status_exists(device_data.device_status) do
+        {:ok, device_data.device_status}
+      end
+    else
+      {:ok,
+       %{
+         last_seen_ip: device.last_seen_ip,
+         last_connection: device.last_connection,
+         last_disconnection: device.last_disconnection
+       }}
+    end
+  end
+
+  defp uninitialized_device_status?(device) do
+    Enum.any?(@device_status_attributes, &(Map.get(device, &1) == nil))
+  end
+
   defp validate_device_status_exists(nil), do: {:error, :device_status_not_found}
   defp validate_device_status_exists(_), do: :ok
 

backend/priv/repo/migrations/20251218130408_add_last_seen_ip_to_device.exs

@@ -0,0 +1,41 @@
+#
+# This file is part of Edgehog.
+#
+# Copyright 2025 SECO Mind Srl
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+defmodule Edgehog.Repo.Migrations.AddLastSeenIpToDevice do
+  @moduledoc """
+  Updates resources based on their most recent snapshots.
+
+  This file was autogenerated with `mix ash_postgres.generate_migrations`
+  """
+
+  use Ecto.Migration
+
+  def up do
+    alter table(:devices) do
+      add :last_seen_ip, :text
+    end
+  end
+
+  def down do
+    alter table(:devices) do
+      remove :last_seen_ip
+    end
+  end
+end