pds/app/Filament/Imports/WorkGroupMasterImporter.php

<?php

namespace App\Filament\Imports;

use App\Models\Plant;
use App\Models\User;
use App\Models\WorkGroupMaster;
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 WorkGroupMasterImporter extends Importer
{
    protected static ?string $model = WorkGroupMaster::class;

    public static function getColumns(): array
    {
        return [
            ImportColumn::make('plant')
                ->requiredMapping()
                ->exampleHeader('Plant Name')
                ->example('Ransar Industries-I')
                ->label('Plant Name')
                ->relationship(resolveUsing:'name')
                ->rules(['required']),
            ImportColumn::make('name')
                ->requiredMapping()
                ->exampleHeader('Name')
                ->example('RMGCEABC')
                ->label('Name')
                ->rules(['required']),
            ImportColumn::make('description')
                ->requiredMapping()
                ->exampleHeader('Description')
                ->example('Testing Model 1')
                ->label('Description')
                ->rules(['required']),
            ImportColumn::make('operation_number')
                ->requiredMapping()
                ->exampleHeader('Operation Number')
                ->example('0020')
                ->label('Operation Number')
                ->rules(['required']),
            ImportColumn::make('created_by')
                ->requiredMapping()
                ->exampleHeader('Created By')
                ->example('Admin')
                ->label('Created By')
                ->rules(['required']),
        ];
    }



    public function resolveRecord(): ?WorkGroupMaster
    {
        // return WorkGroupMaster::firstOrNew([
        //     // Update existing records, matching them by `$this->data['column_name']`
        //     'email' => $this->data['email'],
        // ]);
        $warnMsg = [];
        $plant = Plant::where('name', $this->data['plant'])->first();
        if (!$plant) {
            $warnMsg[] = "Plant not found";
        }

        if (Str::length($this->data['name']) <= 0) {  //|| !ctype_alnum($this->data['description'])
            $warnMsg[] = "Invalid name found";
        }

        if (Str::length(trim($this->data['description'])) <= 0) {
            $warnMsg[] = "Invalid description found";
        }

        $desc = trim($this->data['description']);

        if (Str::length($desc) > 44) {
            $warnMsg[] = "Description should be less than 44 digits.";
        }

        if (Str::length($this->data['operation_number']) <= 0) {
            $warnMsg[] = "Invalid operation number found";
        }

        if(!is_numeric($this->data['operation_number']))
        {
            $warnMsg[] = "Invalid operation number found must be numeric";
        }

        $user = User::where('name', $this->data['created_by'])->first();
        if (!$user) {
            $warnMsg[] = "Operator ID not found";
        }

        if (!empty($warnMsg)) {
            throw new RowImportFailedException(implode(', ', $warnMsg));
        }
        else
        {
           //Check (plant_id, name)
            $existingByName = WorkGroupMaster::where('plant_id', $plant->id)
                ->where('name', $this->data['name'])
                ->first();

            if ($existingByName) {
                throw new RowImportFailedException("Work group name already exists for this plant!");
            }

            //Check (plant_id, operation_number)
            $existingByOpNum = WorkGroupMaster::where('plant_id', $plant->id)
                ->where('operation_number', $this->data['operation_number'])
                ->where('name', $this->data['name'])
                ->first();

            if ($existingByOpNum) {
                throw new RowImportFailedException("Operation number already exists for this plant!");
            }

            //Check (plant_id)
            $existingByOperator = WorkGroupMaster::where('plant_id', $plant->id)
                ->where('name', $this->data['name'])
                ->first();

            if ($existingByOperator) {
                throw new RowImportFailedException("Already work group name assigned to another plant!");
            }
        }

        WorkGroupMaster::updateOrCreate([
            'plant_id' => $plant->id,
            'name' => $this->data['name'],
            'description' => $this->data['description'],
            'operation_number' => $this->data['operation_number'],
            'created_by' => $this->data['created_by'],
        ]);

        return null;

        //return new WorkGroupMaster();
    }

    public static function getCompletedNotificationBody(Import $import): string
    {
        $body = 'Your work group master import has completed and ' . number_format($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;
    }
}