location/app/Http/Controllers/ProvincesController.php

<?php

namespace Modules\Location\Http\Controllers;

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

class ProvincesController 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 provinces.');
        }

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

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

        return view('location::provinces.create');
    }

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

        $validate = $request->validated();

        if($validate){
            try{
                // Save to database
                Province::create($validate);
                return redirect()->route('locations.provinces.index')->with('success', 'Province created successfully');
            } catch (\Exception $e){
                return redirect()->route('locations.provinces.create')->with('error', 'Failed to create province');
            }
        }
    }

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

        $province = Province::find($id);
        return view('location::provinces.create', compact('province'));
    }

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

        $validate = $request->validated();

        if($validate){
            try{
                // Update in database
                $province = Province::find($id);
                $province->update($validate);
                return redirect()->route('locations.provinces.index')->with('success', 'Province updated successfully');
            } catch (\Exception $e){
                return redirect()->route('locations.provinces.edit', $id)->with('error', 'Failed to update province');
            }
        }
    }

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

        try{
            // Delete from database
            $province = Province::find($id);
            $province->delete();

            return response()->json(['success' => true, 'message' => 'Province deleted successfully']);
        } catch (\Exception $e){
            return response()->json(['success' => false, 'message' => 'Failed to delete province']);
        }
    }

    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 provinces.']);
        }

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

        // Apply search filter if provided
        if ($request->has('search') && !empty($request->get('search'))) {
            $search = $request->get('search');
            $query->where(function ($q) use ($search) {
                $q->where('code', 'LIKE', "%$search%");
                $q->orWhere('name', 'LIKE', "%$search%");
            });
        }

        // 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->get();

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

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

        // 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.export')) {
            return response()->json(['success' => false, 'message' => 'Sorry! You are not allowed to export provinces.']);
        }

        return Excel::download(new ProvincesExport, 'provinces.xlsx');
    }
}