services_core/app/Http/Resources/Wilayah/WilayahResource.php

<?php

namespace App\Http\Resources\Wilayah;

use App\Models\WilayahDesa;
use App\Models\WilayahKabupaten;
use App\Models\WilayahKecamatan;
use App\Models\WilayahProvinsi;
use Illuminate\Http\Request;
use Illuminate\Http\Resources\Json\JsonResource;

class WilayahResource extends JsonResource
{
    public function toArray(Request $request): array
    {
        $data = [
            'id' => $this->id,
            'kode' => $this->kode,
            'nama' => $this->nama,
            'tingkat' => match (true) {
                $this->resource instanceof WilayahDesa => 'desa',
                $this->resource instanceof WilayahKecamatan => 'kecamatan',
                $this->resource instanceof WilayahKabupaten => 'kabupaten',
                $this->resource instanceof WilayahProvinsi => 'provinsi',
            },
            'created_at' => $this->created_at,
            'updated_at' => $this->updated_at,
        ];

        if ($this->resource instanceof WilayahKabupaten) {
            $data['provinsi_id'] = $this->provinsi_id;
            $data['provinsi'] = $this->whenLoaded('provinsi', fn () => $this->node($this->provinsi));
        }

        if ($this->resource instanceof WilayahKecamatan) {
            $data['kabupaten_id'] = $this->kabupaten_id;
            $data['kabupaten'] = $this->whenLoaded('kabupaten', fn () => $this->node($this->kabupaten));
            $data['provinsi'] = $this->when(
                $this->relationLoaded('kabupaten') && $this->kabupaten?->relationLoaded('provinsi'),
                fn () => $this->node($this->kabupaten?->provinsi)
            );
        }

        if ($this->resource instanceof WilayahDesa) {
            $data['kecamatan_id'] = $this->kecamatan_id;
            $data['kecamatan'] = $this->whenLoaded('kecamatan', fn () => $this->node($this->kecamatan));
            $data['kabupaten'] = $this->when(
                $this->relationLoaded('kecamatan') && $this->kecamatan?->relationLoaded('kabupaten'),
                fn () => $this->node($this->kecamatan?->kabupaten)
            );
            $data['provinsi'] = $this->when(
                $this->relationLoaded('kecamatan')
                    && $this->kecamatan?->relationLoaded('kabupaten')
                    && $this->kecamatan?->kabupaten?->relationLoaded('provinsi'),
                fn () => $this->node($this->kecamatan?->kabupaten?->provinsi)
            );
        }

        return $data;
    }

    private function node($wilayah): ?array
    {
        return $wilayah ? [
            'id' => $wilayah->id,
            'kode' => $wilayah->kode,
            'nama' => $wilayah->nama,
        ] : null;
    }
}