Refactor various methods away from controllers

app/Support/Http/Controllers/BasicDataSupport.php

@@ -30,6 +30,33 @@ namespace FireflyIII\Support\Http\Controllers;
  */
 trait BasicDataSupport
 {
+
+    /**
+     * Filters empty results from getBudgetPeriodReport.
+     *
+     * @param array $data
+     *
+     * @return array
+     */
+    protected function filterPeriodReport(array $data): array // helper function for period overview.
+    {
+        /**
+         * @var int $entryId
+         * @var array $set
+         */
+        foreach ($data as $entryId => $set) {
+            $sum = '0';
+            foreach ($set['entries'] as $amount) {
+                $sum = bcadd($amount, $sum);
+            }
+            $data[$entryId]['sum'] = $sum;
+            if (0 === bccomp('0', $sum)) {
+                unset($data[$entryId]);
+            }
+        }
+
+        return $data;
+    }
     /**
      * Sum up an array.
      *