Can sort and group bills.

app/Repositories/Bill/BillRepository.php

@@ -32,6 +32,7 @@ use FireflyIII\Models\Note;
 use FireflyIII\Models\Transaction;
 use FireflyIII\Models\TransactionJournal;
 use FireflyIII\Repositories\Journal\JournalRepositoryInterface;
+use FireflyIII\Repositories\ObjectGroup\CreatesObjectGroups;
 use FireflyIII\Services\Internal\Destroy\BillDestroyService;
 use FireflyIII\Services\Internal\Update\BillUpdateService;
 use FireflyIII\Support\CacheProperties;
@@ -48,6 +49,7 @@ use Storage;
  */
 class BillRepository implements BillRepositoryInterface
 {
+    use CreatesObjectGroups;
     /** @var User */
     private $user;
 
@@ -730,4 +732,36 @@ class BillRepository implements BillRepositoryInterface
             $current++;
         }
     }
+
+    /**
+     * @inheritDoc
+     */
+    public function setObjectGroup(Bill $bill, string $objectGroupTitle): Bill
+    {
+        $objectGroup = $this->findOrCreateObjectGroup($objectGroupTitle);
+        if (null !== $objectGroup) {
+            $bill->objectGroups()->sync([$objectGroup->id]);
+        }
+
+        return $bill;
+    }
+
+    /**
+     * @inheritDoc
+     */
+    public function removeObjectGroup(Bill $bill): Bill
+    {
+        $bill->objectGroups()->sync([]);
+
+        return $bill;
+    }
+
+    /**
+     * @inheritDoc
+     */
+    public function setOrder(Bill $bill, int $order): void
+    {
+        $bill->order = $order;
+        $bill->save();
+    }
 }

app/Repositories/Bill/BillRepositoryInterface.php

@@ -35,6 +35,21 @@ use Illuminate\Support\Collection;
 interface BillRepositoryInterface
 {
 
+    /**
+     * @param Bill   $bill
+     * @param string $objectGroupTitle
+     *
+     * @return Bill
+     */
+    public function setObjectGroup(Bill $bill, string $objectGroupTitle): Bill;
+
+    /**
+     * @param Bill $bill
+     *
+     * @return Bill
+     */
+    public function removeObjectGroup(Bill $bill): Bill;
+
     /**
      * @param Bill $bill
      */
@@ -45,6 +60,14 @@ interface BillRepositoryInterface
      */
     public function correctOrder(): void;
 
+    /**
+     * Set specific piggy bank to specific order.
+     *
+     * @param Bill $bill
+     * @param int  $order
+     */
+    public function setOrder(Bill $bill, int $order): void;
+
     /**
      * @param Bill $bill
      *