feat: implement company deletion functionality with confirmation dialog

backend/app/Http/Controllers/CompanyController.php

@@ -4,7 +4,10 @@ namespace App\Http\Controllers;
 
 use App\Models\Company;
 use App\Models\User;
+use App\Models\Internship;
+use App\Models\InternshipStatus;
 use Illuminate\Http\Request;
+use Illuminate\Support\Facades\DB;
 
 class CompanyController extends Controller
 {
@@ -152,4 +155,67 @@ class CompanyController extends Controller
     {
         //
     }
+
+    /**
+     * Delete a company, its contact person and all related data.
+     */
+    public function delete(int $id)
+    {
+        $user = auth()->user();
+
+        // Admin kontrola
+        if ($user->role !== 'ADMIN') {
+            abort(403, 'Unauthorized');
+        }
+
+        $company = Company::find($id);
+
+        if (!$company) {
+            return response()->json([
+                'message' => 'No such company exists.'
+            ], 400);
+        }
+
+        try {
+            DB::beginTransaction();
+
+            // 1. Získaj všetky internship IDs firmy
+            $internshipIds = Internship::where('company_id', $company->id)
+                ->pluck('id')
+                ->toArray();
+
+            // 2. Vymaž všetky internship statuses
+            if (!empty($internshipIds)) {
+                InternshipStatus::whereIn('internship_id', $internshipIds)->delete();
+            }
+
+            // 3. Vymaž všetky internships firmy
+            Internship::where('company_id', $company->id)->delete();
+
+            // 4. Získaj contact usera
+            $contactUser = User::find($company->contact);
+
+            // 5. Vymaž company
+            $company->delete();
+
+            // 6. Vymaž contact usera (EMPLOYER)
+            if ($contactUser && $contactUser->role === 'EMPLOYER') {
+                $contactUser->delete();
+            }
+
+            DB::commit();
+
+            return response()->json([
+                'message' => 'Company successfully deleted.'
+            ], 200);
+
+        } catch (\Exception $e) {
+            DB::rollBack();
+
+            return response()->json([
+                'message' => 'Error deleting company.',
+                'error' => $e->getMessage()
+            ], 500);
+        }
+    }
 }

backend/app/Models/Company.php

@@ -22,4 +22,20 @@ class Company extends Model
         'contact',
         'hiring'
     ];
+
+    /**
+     * Get the internships for the company.
+     */
+    public function internships()
+    {
+        return $this->hasMany(Internship::class, 'company_id');
+    }
+
+    /**
+     * Get the contact person (user) for the company.
+     */
+    public function contactPerson()
+    {
+        return $this->belongsTo(User::class, 'contact');
+    }
 }

backend/routes/api.php

@@ -54,4 +54,5 @@ Route::prefix('/companies')->middleware("auth:sanctum")->group(function () {
     Route::get("/simple", [CompanyController::class, 'all_simple']);
     Route::get("/{id}", [CompanyController::class, 'get']);
     Route::post("/{id}", [CompanyController::class, 'update_all']);
+    Route::delete("/{id}", [CompanyController::class, 'delete']);
 });