Master/Http/Controllers/CityController.php

<?php

    namespace Modules\Master\Http\Controllers;

    use Exception;
    use Illuminate\Contracts\Support\Renderable;
    use Illuminate\Http\Request;
    use Illuminate\Routing\Controller;
    use Illuminate\Support\Facades\Auth;
    use Modules\Master\DataTables\CityDataTable;
    use Modules\Master\Entities\City;
    use Modules\Master\Entities\Country;
    use Modules\Master\Http\Requests\City\StoreCityRequest;
    use Modules\Master\Http\Requests\City\UpdateCityRequest;

    class CityController extends Controller
    {
        protected $user;
        protected $model = City::class;
        protected $module;

        public function __construct()
        {
            $this->middleware(function ($request, $next) {
                $this->user = Auth::guard('web')->user();
                return $next($request);
            });

            $module       = file_get_contents(dirname(__FILE__, 3) . '/module.json');
            $this->module = json_decode($module);
        }

        /**
         * Display a listing of the resource.
         *
         * @return Renderable
         */
        public function index(CityDataTable $dataTable, Request $request)
        {
            if (is_null($this->user) || !$this->user->can($this->module->alias . '.read')) {
                abort(403, 'Sorry !! You are Unauthorized to view any ' . $this->module->alias . ' !');
            }

            if (isset($request->province_id) && !empty($request->province_id)) {
                $this->show($request);
                return;
            }

            addVendor('chained-select');

            $countries = Country::all();

            $_table = $dataTable->render($this->module->alias . '::city.index', compact('countries'));
            if(!empty($_table->data)){
                return $_table;
            }
        }

        /**
         * Store a newly created resource in storage.
         *
         * @param Request $request
         *
         * @return Renderable
         */
        public function store(StoreCityRequest $request)
        {
            if (is_null($this->user) || !$this->user->can($this->module->alias . '.create')) {
                abort(403, 'Sorry !! You are Unauthorized to create any ' . $this->module->alias . ' !');
            }

            //Validate the request
            $validated = $request->validated();

            // Store the City...
            if ($validated) {
                try {
                    $this->model::create($validated);
                    echo json_encode(['status' => 'success', 'message' => $this->module->name . ' city created successfully.']);
                } catch (Exception $e) {
                    echo json_encode(['status' => 'error', 'message' => $this->module->name . ' city created failed.']);
                }
                return;
            }

            echo json_encode(['status' => 'error', 'message' => $this->module->name . ' city created failed.']);
        }

        /**
         * Show the form for creating a new resource.
         *
         * @return Renderable
         */
        public function create()
        {
            if (is_null($this->user) || !$this->user->can($this->module->alias . '.create')) {
                abort(403, 'Sorry !! You are Unauthorized to create any ' . $this->module->alias . ' !');
            }

            abort(404);
        }

        /**
         * Show the specified resource.
         *
         * @param int $id
         *
         * @return Renderable
         */
        public function show(Request $request)
        {
            if(is_null($this->user) || !$this->user->can($this->module->alias . '.read')) {
                abort(403, 'Sorry !! You are Unauthorized to view any ' . $this->module->alias . ' !');
            }

            $cities = City::where('province_id', $request->province_id)->get();

            $data = [];
            foreach ($cities as $row) {
                $result = [
                    $row->id => $row->name,
                ];

                $data[] = $result;
            }

            echo json_encode($data);
        }

        /**
         * Show the form for editing the specified resource.
         *
         * @param int $id
         *
         * @return Renderable
         */
        public function edit($id)
        {
            if (is_null($this->user) || !$this->user->can($this->module->alias . '.update')) {
                abort(403, 'Sorry !! You are Unauthorized to update any ' . $this->module->alias . ' !');
            }

            $data = $this->model::with('province')->find($id);
            echo json_encode($data);
        }

        /**
         * Update the specified resource in storage.
         *
         * @param Request $request
         * @param int     $id
         *
         * @return Renderable
         */
        public function update(UpdateCityRequest $request, City $city)
        {
            if (is_null($this->user) || !$this->user->can($this->module->alias . '.update')) {
                abort(403, 'Sorry !! You are Unauthorized to update any ' . $this->module->alias . ' !');
            }

            //Validate the request
            $validated = $request->validated();

            // Update the City...
            if ($validated) {
                try {
                    $city->update($validated);
                    echo json_encode(['status' => 'success', 'message' => $this->module->name . ' city updated successfully.']);
                } catch (Exception $e) {
                    echo json_encode(['status' => 'error', 'message' => $this->module->name . ' city updated failed.']);
                }
                return;
            }

            echo json_encode(['status' => 'error', 'message' => $this->module->name . ' city updated failed.']);
        }

        /**
         * Remove the specified resource from storage.
         *
         * @param int $id
         *
         * @return Renderable
         */
        public function destroy(City $city)
        {
            if (is_null($this->user) || !$this->user->can($this->module->alias . '.delete')) {
                abort(403, 'Sorry !! You are Unauthorized to delete any ' . $this->module->alias . ' !');
            }

            try {
                $city->delete();
                echo json_encode(['status' => 'success', 'message' => $this->module->name . ' city deleted successfully.']);
            } catch (Exception $e) {
                echo json_encode(['status' => 'error', 'message' => $this->module->name . ' city deleted failed.']);
            }
        }
    }