pds/app/Filament/Imports/BlockImporter.php

<?php

namespace App\Filament\Imports;

use App\Models\Block;
use App\Models\Plant;
use Filament\Actions\Imports\Exceptions\RowImportFailedException;
use Filament\Actions\Imports\ImportColumn;
use Filament\Actions\Imports\Importer;
use Filament\Actions\Imports\Models\Import;
use Str;

class BlockImporter extends Importer
{
    protected static ?string $model = Block::class;

    public static function getColumns(): array
    {
        return [
            ImportColumn::make('name')
                ->requiredMapping()
                ->exampleHeader('BLOCK NAME')
                ->example('Block A')
                ->label('BLOCK NAME')
                ->rules(['required']),
            ImportColumn::make('plant')
                ->requiredMapping()
                ->exampleHeader('PLANT CODE')
                ->example('1000')
                ->label('PLANT CODE')
                ->relationship(resolveUsing: 'code')
                ->rules(['required']),
        ];
    }

    public function resolveRecord(): ?Block
    {
        $warnMsg = [];
        $plantCod = $this->data['plant'];
        $plant = null;
        if (Str::length($plantCod) < 4 || ! is_numeric($plantCod) || ! preg_match('/^[1-9]\d{3,}$/', $plantCod)) {
            $warnMsg[] = 'Invalid plant code found';
        } else {
            $plant = Plant::where('code', $plantCod)->first();
            if (! $plant) {
                $warnMsg[] = 'Plant not found';
                // $warnMsg[] = "Plant '" . $plantCod . "' not found";
            }
        }
        if (Str::length($this->data['name']) < 0) {
            $warnMsg[] = 'Block name not found';
        }

        if (! empty($warnMsg)) {
            throw new RowImportFailedException(implode(', ', $warnMsg));
        }

        return Block::updateOrCreate([
            'name' => $this->data['name'],
            'plant_id' => $plant->id,
        ]);
        // return Block::firstOrNew([
        //     // Update existing records, matching them by `$this->data['column_name']`
        //     'email' => $this->data['email'],
        // ]);

        // return new Block();
    }

    public static function getCompletedNotificationBody(Import $import): string
    {
        $body = 'Your block import has completed and '.number_format($import->successful_rows).' '.str('row')->plural($import->successful_rows).' imported.';

        if ($failedRowsCount = $import->getFailedRowsCount()) {
            $body .= ' '.number_format($failedRowsCount).' '.str('row')->plural($failedRowsCount).' failed to import.';
        }

        return $body;
    }
}