From be0cbb1756b306e23a118cb080674526b85ff980 Mon Sep 17 00:00:00 2001
From: Yash <yash.govekar55@gmail.com>
Date: Wed, 26 Oct 2022 12:31:09 +0530
Subject: [PATCH] Rebased and fixed issue #1275

---
 app/Http/Controllers/Admin/RankController.php | 20 ++++++++++++++++++-
 1 file changed, 19 insertions(+), 1 deletion(-)

diff --git a/app/Http/Controllers/Admin/RankController.php b/app/Http/Controllers/Admin/RankController.php
index 6a6f008b8..be7989149 100644
--- a/app/Http/Controllers/Admin/RankController.php
+++ b/app/Http/Controllers/Admin/RankController.php
@@ -7,6 +7,7 @@
 use App\Http\Requests\UpdateRankRequest;
 use App\Repositories\RankRepository;
 use App\Repositories\SubfleetRepository;
+use App\Repositories\UserRepository;
 use App\Services\FleetService;
 use Cache;
 use Illuminate\Http\Request;
@@ -18,6 +19,7 @@ class RankController extends Controller
     private FleetService $fleetSvc;
     private RankRepository $rankRepository;
     private SubfleetRepository $subfleetRepo;
+    private UserRepository $userRepo;
 
     /**
      * RankController constructor.
@@ -25,15 +27,18 @@ class RankController extends Controller
      * @param FleetService       $fleetSvc
      * @param RankRepository     $rankingRepo
      * @param SubfleetRepository $subfleetRepo
+     * @param UserRepository     $userRepo
      */
     public function __construct(
         FleetService $fleetSvc,
         RankRepository $rankingRepo,
-        SubfleetRepository $subfleetRepo
+        SubfleetRepository $subfleetRepo,
+        UserRepository $userRepo
     ) {
         $this->fleetSvc = $fleetSvc;
         $this->rankRepository = $rankingRepo;
         $this->subfleetRepo = $subfleetRepo;
+        $this->userRepo = $userRepo;
     }
 
     /**
@@ -190,6 +195,19 @@ public function update($id, UpdateRankRequest $request)
      */
     public function destroy($id)
     {
+        $rank_in_use = $this->userRepo->findWhere(['rank_id' => $id])->count();
+        if ($rank_in_use > 0) {
+            Flash::error('Rank cannot be deleted since it\'s already assigned to one or more pilots!');
+
+            return redirect(route('admin.ranks.index'));
+        }
+
+        if ($this->rankRepository->count() === 1) {
+            Flash::error('Rank cannot be deleted since it\'s the only remaining rank in your database!');
+
+            return redirect(route('admin.ranks.index'));
+        }
+
         $rank = $this->rankRepository->findWithoutFail($id);
 
         if (empty($rank)) {