Various code for currency exchange rate support

app/Api/V2/Controllers/Model/Budget/SumController.php

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+<?php
+/*
+ * SumController.php
+ * Copyright (c) 2022 james@firefly-iii.org
+ *
+ * This file is part of Firefly III (https://github.com/firefly-iii).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+namespace FireflyIII\Api\V2\Controllers\Model\Budget;
+
+use FireflyIII\Api\V2\Controllers\Controller;
+use FireflyIII\Api\V2\Request\Generic\DateRequest;
+use FireflyIII\Repositories\Budget\BudgetRepositoryInterface;
+use FireflyIII\Support\Http\Api\ConvertsExchangeRates;
+use Illuminate\Http\JsonResponse;
+
+/**
+ * Class SumController
+ */
+class SumController extends Controller
+{
+    use ConvertsExchangeRates;
+
+    private BudgetRepositoryInterface $repository;
+
+    /**
+     *
+     */
+    public function __construct()
+    {
+        $this->middleware(
+            function ($request, $next) {
+                $this->repository = app(BudgetRepositoryInterface::class);
+                return $next($request);
+            }
+        );
+    }
+
+    /**
+     * @param DateRequest $request
+     * @return JsonResponse
+     */
+    public function budgeted(DateRequest $request): JsonResponse
+    {
+        $data      = $request->getAll();
+        $result    = $this->repository->budgetedInPeriod($data['start'], $data['end']);
+        $converted = $this->cerSum(array_values($result));
+
+        return response()->json($converted);
+    }
+
+}