Feature #3 : Districts

app/Exports/DistrictsExport.php

@@ -0,0 +1,44 @@
+<?php
+
+namespace Modules\Location\Exports;
+
+use Maatwebsite\Excel\Concerns\FromCollection;
+use Maatwebsite\Excel\Concerns\WithColumnFormatting;
+use Maatwebsite\Excel\Concerns\WithHeadings;
+use Maatwebsite\Excel\Concerns\WithMapping;
+use Modules\Location\Models\District;
+
+class DistrictsExport implements WithColumnFormatting, WithHeadings, FromCollection, withMapping
+{
+    public function collection(){
+        return District::with('city.province')->get();
+    }
+
+    public function map($row): array{
+        return [
+            $row->id,
+            $row->code,
+            $row->name,
+            $row->city->name,
+            $row->city->province->name,
+            $row->created_at
+        ];
+    }
+    public function headings(): array{
+        return [
+            'ID',
+            'Code',
+            'Name',
+            'City',
+            'Province',
+            'Created At'
+        ];
+    }
+
+    public function columnFormats(): array{
+        return [
+            'A' => \PhpOffice\PhpSpreadsheet\Style\NumberFormat::FORMAT_NUMBER,
+            'F' => \PhpOffice\PhpSpreadsheet\Style\NumberFormat::FORMAT_DATE_DATETIME
+        ];
+    }
+}

app/Http/Controllers/CitiesController.php

@@ -132,4 +132,8 @@ class CitiesController extends Controller
     {
         return Excel::download(new CitiesExport, 'cities.xlsx');
     }
+
+    public function getCitiesByProvinceId($id){
+        return response()->json(City::where('province_code', $id)->get());
+    }
 }

app/Http/Controllers/DistrictsController.php

@@ -0,0 +1,135 @@
+<?php
+
+namespace Modules\Location\Http\Controllers;
+
+use App\Http\Controllers\Controller;
+use Illuminate\Http\Request;
+use Maatwebsite\Excel\Facades\Excel;
+use Modules\Location\Exports\DistrictsExport;
+use Modules\Location\Http\Requests\DistrictRequest;
+use Modules\Location\Models\City;
+use Modules\Location\Models\District;
+use Modules\Location\Models\Province;
+
+class DistrictsController extends Controller
+{
+    public $user;
+
+    public function index(){
+        return view('location::districts.index');
+    }
+
+    public function create(){
+        $provinces = Province::all();
+        return view('location::districts.create', compact('provinces'));
+    }
+
+    public function store(DistrictRequest $request){
+        $validate = $request->validated();
+
+        if($validate){
+            try{
+                $district = District::create($validate);
+                return redirect()->route('locations.districts.index')->with('success', 'District created successfully');
+            } catch(\Exception $e){
+                return redirect()->back()->with('error', 'Failed to create district. '.$e->getMessage());
+            }
+        }
+    }
+
+    public function edit($id){
+        $district = District::find($id);
+        $provinces = Province::all();
+        $cities = City::where('province_code', $district->province_code)->get();
+        return view('location::districts.create', compact('district', 'provinces','cities'));
+    }
+
+    public function update(DistrictRequest $request, $id){
+        $validate = $request->validated();
+
+        if($validate){
+            try{
+                $district = District::find($id);
+                $district->update($validate);
+                return redirect()->route('locations.districts.index')->with('success', 'District updated successfully');
+            } catch(\Exception $e){
+                return redirect()->back()->with('error', 'Failed to update district. '.$e->getMessage());
+            }
+        }
+    }
+
+    public function destroy($id){
+        try{
+            District::destroy($id);
+            echo json_encode(['message' => 'District deleted successfully','success'=>true ]);
+        } catch(\Exception $e){
+            echo json_encode(['message' => 'Failed to delete District', 'success' => false]);
+        }
+    }
+
+    public function dataForDatatables(Request $request){
+        if (is_null($this->user) || !$this->user->can('provinces.view')) {
+            //abort(403, 'Sorry! You are not allowed to view users.');
+        }
+
+        // Retrieve data from the database
+        $query = District::query();
+
+        // Apply search filter if provided
+        if ($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%");
+                $q->orWhereRelation('city','name', 'LIKE', "%$search%");
+                $q->orWhereRelation('city.province','name', 'LIKE', "%$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
+        $cities = $query->with('city.province')->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'            => $cities,
+        ]);
+    }
+
+    public function export(Request $request){
+        return Excel::download(new DistrictsExport, 'districts.xlsx');
+    }
+}

app/Http/Requests/DistrictRequest.php

@@ -0,0 +1,40 @@
+<?php
+
+    namespace Modules\Location\Http\Requests;
+
+    use Illuminate\Foundation\Http\FormRequest;
+
+    class DistrictRequest extends FormRequest
+    {
+        /**
+         * Get the validation rules that apply to the request.
+         */
+        public function rules()
+        : array
+        {
+            $rules = [
+                'province_code' => 'required|exists:provinces,code',
+                'city_code'     => 'required|exists:cities,code',
+            ];
+
+            if ($this->method() === 'PUT') {
+                $rules['code'] = 'required|string|max:6|unique:districts,code,' . $this->id;
+                $rules['name'] = 'required|string|max:2554|unique:districts,name,' . $this->id;
+            } else {
+                $rules['code'] = 'required|string|max:6|unique:districts,code';
+                $rules['name'] = 'required|string|max:2554|unique:districts,name';
+            }
+
+            return $rules;
+        }
+
+
+        /**
+         * Determine if the user is authorized to make this request.
+         */
+        public function authorize()
+        : bool
+        {
+            return true;
+        }
+    }

app/Models/District.php

@@ -0,0 +1,20 @@
+<?php
+
+namespace Modules\Location\Models;
+
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Modules\Location\Database\Factories\DistrictFactory;
+
+class District extends Base
+{
+    protected $fillable = ['province_code','city_code', 'code', 'name'];
+
+    public function city(){
+        return $this->belongsTo(City::class, 'city_code', 'code');
+    }
+
+    public function villages(){
+        return $this->hasMany(Village::class, 'district_code', 'code');
+    }
+}