Tweak reports.

app/Http/Controllers/Report/BalanceController.php

@@ -0,0 +1,60 @@
+<?php
+/**
+ * BalanceController.php
+ * Copyright (C) 2016 thegrumpydictator@gmail.com
+ *
+ * This software may be modified and distributed under the terms of the
+ * Creative Commons Attribution-ShareAlike 4.0 International License.
+ *
+ * See the LICENSE file for details.
+ */
+
+declare(strict_types = 1);
+
+namespace FireflyIII\Http\Controllers\Report;
+
+
+use Carbon\Carbon;
+use FireflyIII\Helpers\Report\BalanceReportHelperInterface;
+use FireflyIII\Http\Controllers\Controller;
+use FireflyIII\Support\CacheProperties;
+use Illuminate\Support\Collection;
+
+/**
+ * Class BalanceController
+ *
+ * @package FireflyIII\Http\Controllers\Report
+ */
+class BalanceController extends Controller
+{
+
+    /**
+     * @param BalanceReportHelperInterface $helper
+     * @param Carbon                       $start
+     * @param Carbon                       $end
+     * @param Collection                   $accounts
+     *
+     * @return string
+     */
+    public function balanceReport(BalanceReportHelperInterface $helper, Carbon $start, Carbon $end, Collection $accounts)
+    {
+
+
+        // chart properties for cache:
+        $cache = new CacheProperties;
+        $cache->addProperty($start);
+        $cache->addProperty($end);
+        $cache->addProperty('balance-report');
+        $cache->addProperty($accounts->pluck('id')->toArray());
+        if ($cache->has()) {
+            return $cache->get();
+        }
+
+        $balance = $helper->getBalanceReport($start, $end, $accounts);
+
+        $result = view('reports.partials.balance', compact('balance'))->render();
+        $cache->store($result);
+
+        return $result;
+    }
+}