location/app/Http/Controllers/CitiesController.php

<?php

namespace Modules\Location\Http\Controllers;

use App\Http\Controllers\Controller;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Auth;
use Maatwebsite\Excel\Facades\Excel;
use Modules\Location\Exports\CitiesExport;
use Modules\Location\Http\Requests\CityRequest;
use Modules\Location\Models\City;
use Modules\Location\Models\Province;


class CitiesController extends Controller
{
    protected $user;

    public function __construct()
    {
        $this->user = Auth::guard('web')->user();
    }

    public function index(){
        if (is_null($this->user) || !$this->user->can('location.read')) {
            abort(403, 'Sorry! You are not allowed to view cities.');
        }

        return view('location::cities.index');
    }

    public function create(){
        if (is_null($this->user) || !$this->user->can('location.create')) {
            abort(403, 'Sorry! You are not allowed to create cities.');
        }

        $provinces = Province::all();
        return view('location::cities.create',compact('provinces'));
    }

    public function store(CityRequest $request){
        if (is_null($this->user) || !$this->user->can('location.create')) {
            abort(403, 'Sorry! You are not allowed to create cities.');
        }

        $validate = $request->validated();

        if($validate){
            try {
                City::create($validate);
                return redirect()->route('locations.cities.index')->with('success', 'City created successfully');
            } catch (\Exception $e) {
                return redirect()->route('locations.cities.create')->with('error', 'Failed to create city');
            }
        }
    }

    public function edit($id){
        if (is_null($this->user) || !$this->user->can('location.update')) {
            abort(403, 'Sorry! You are not allowed to update cities.');
        }

        $city = City::find($id);
        $provinces = Province::all();
        return view('location::cities.create', compact('city', 'provinces'));
    }

    public function update(CityRequest $request, $id){
        if (is_null($this->user) || !$this->user->can('location.update')) {
            abort(403, 'Sorry! You are not allowed to update cities.');
        }

        $validate = $request->validated();

        if($validate){
            try {
                $city = City::find($id);
                $city->update($validate);
                return redirect()->route('locations.cities.index')->with('success', 'City updated successfully');
            } catch (\Exception $e) {
                return redirect()->route('locations.cities.edit', $id)->with('error', 'Failed to update city');
            }
        }
    }

    public function destroy($id){
        if (is_null($this->user) || !$this->user->can('provinces.delete')) {
            return response()->json(['success' => false, 'message' => 'Sorry! You are not allowed to delete cities.']);
        }

        try {
            City::destroy($id);
            return response()->json(['message' => 'City deleted successfully', 'success' => true]);
        } catch (\Exception $e) {
            return response()->json(['message' => 'Failed to delete city', 'success' => false]);
        }
    }

    public function dataForDatatables(Request $request){
        if (is_null($this->user) || !$this->user->can('location.read')) {
            return response()->json(['success' => false, 'message' => 'Sorry! You are not allowed to view cities.'], 403);
        }

        // Retrieve data from the database
        $query = City::query();

        // Apply search filter if provided
        if ($request->has('search') && !empty($request->get('search'))) {
            $search = $request->get('search');
            $search = explode('|', $search);
            if(isset($search[0]) && !empty($search[0])){
                // Define special city codes once
                $specialCityCodes = ['92.01', '92.04', '92.05', '92.09', '92.10', '92.71'];

                // Handle Papua province special cases
                if($search[0] == '92'){
                    $query->where('province_code', '92')
                          ->whereNotIn('code', $specialCityCodes);
                } else if($search[0] == '92.1'){
                    $query->where('province_code', '92')
                          ->whereIn('code', $specialCityCodes);
                } else {
                    // For all other provinces
                    $query->where('province_code', $search[0]);
                }
            }
            $query->where(function ($q) use ($search) {
                $q->where('code', 'LIKE', "%$search[1]%");
                $q->orWhere('name', 'LIKE', "%$search[1]%");
                $q->orWhereRelation('province','name', 'LIKE', "%$search[1]%");
            });
        }

        // Apply sorting if provided
        if ($request->has('sortOrder') && !empty($request->get('sortOrder'))) {
            $order  = $request->get('sortOrder');
            $column = $request->get('sortField');
            $query->orderBy($column, $order);
        }

        // Get the total count of records
        $totalRecords = $query->count();

        // Apply pagination if provided
        if ($request->has('page') && $request->has('size')) {
            $page   = $request->get('page');
            $size   = $request->get('size');
            $offset = ($page - 1) * $size; // Calculate the offset

            $query->skip($offset)->take($size);
        }

        // Get the filtered count of records
        $filteredRecords = $query->count();

        // Get the data for the current page
        $data = $query->with('province')->get();

        // Calculate the page count
        $pageCount = ceil($totalRecords/$request->get('size'));

        // Calculate the current page number
        $currentPage = 0 + 1;

        //maping data for datatables,
        //jika city code adalah '92.01', '92.04', '92.05', '92.09', '92.10', '92.71'  maka province code yang dipilih adalah 92.1
        $data = $data->map(function ($item) {
            if (in_array($item->code, ['92.01', '92.04', '92.05', '92.09', '92.10', '92.71'])) {
                $item->province_name = Province::where('code', '92.1')->first()->name;
            } else {
                $item->province_name = $item->province->name;
            }
            return $item;
        });

        // Apply the search filter again if there is a search filter

        // Return the response data as a JSON object
        return response()->json([
            'draw'            => $request->get('draw'),
            'recordsTotal'    => $totalRecords,
            'recordsFiltered' => $filteredRecords,
            'pageCount'       => $pageCount,
            'page'            => $currentPage,
            'totalCount'      => $totalRecords,
            'data'            => $data,
        ]);
    }

    public function export()
    {
        if (is_null($this->user) || !$this->user->can('location.read')) {
            abort(403, 'Sorry! You are not allowed to export cities.');
        }

        return Excel::download(new CitiesExport, 'cities.xlsx');
    }

    public function getCitiesByProvinceId($id)
    {
        if (is_null($this->user) || !$this->user->can('location.read')) {
            return response()->json(['success' => false, 'message' => 'Sorry! You are not allowed to view cities.'], 403);
        }

        $query = City::query();

        $provinceCode = substr($id, 0, 2);
        $query->where('province_code', $provinceCode);

        if ($id == '92.1') {
            $query->whereIn('code', ['92.01', '92.04', '92.05', '92.09', '92.10', '92.71']);
        } elseif ($id == '92') {
            $query->whereNotIn('code', ['92.01', '92.04', '92.05', '92.09', '92.10', '92.71']);
        }

        return response()->json($query->get());
    }
}