Port Device Groups to Ash

Signed-off-by: Riccardo Binetti <[email protected]>

backend/config/config.exs

@@ -91,6 +91,7 @@ config :edgehog, Edgehog.PromEx,
 config :edgehog, :ash_apis, [
   Edgehog.Astarte,
   Edgehog.Devices,
+  Edgehog.Groups,
   Edgehog.Labeling,
   Edgehog.Tenants
 ]

backend/lib/edgehog/groups/device_group/calculations/filter.ex

@@ -0,0 +1,48 @@
+#
+# This file is part of Edgehog.
+#
+# Copyright 2024 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.Groups.DeviceGroup.Calculations.Filter do
+  use Ash.Calculation
+
+  alias Edgehog.Selector
+
+  @impl true
+  def load(_query, _opts, _context) do
+    [:selector]
+  end
+
+  @impl true
+  def calculate(groups, _opts, _context) do
+    Enum.map(groups, fn group ->
+      case Selector.to_ash_expr(group.selector) do
+        {:ok, result} ->
+          result
+
+        # We validate this during creation, so we raise here if we fail
+        {:error, error} ->
+          raise """
+          Cannot parse selector: #{group.selector}
+
+          Error: #{inspect(error)}
+          """
+      end
+    end)
+  end
+end