# Extending

# Events

The import process has a few events you can leverage to interact with the underlying classes to add custom behaviour to the import.

You are able to hook into the parent package by using events.

The events will be activated by adding the WithEvents concern. Inside the registerEvents method, you will have to return an array of events. The key is the Fully Qualified Name (FQN) of the event and the value is a callable event listener. This can either be a closure, array-callable or invokable class.

namespace App\Imports;

use Maatwebsite\Excel\Concerns\WithEvents;
use Maatwebsite\Excel\Events\BeforeImport;
use Maatwebsite\Excel\Events\AfterImport;
use Maatwebsite\Excel\Events\AfterSheet;
use Maatwebsite\Excel\Events\BeforeSheet;


class UsersImport implements WithEvents
{
    /**
     * @return array
     */
    public function registerEvents(): array
    {
        return [
            // Handle by a closure.
            BeforeImport::class => function(BeforeImport $event) {
                $creator = $event->reader->getProperties()->getCreator();
            },
			
		   
            // Using a class with an __invoke method.
            BeforeSheet::class => new BeforeSheetHandler(),
            
            // Array callable, refering to a static method.
            AfterSheet::class => [self::class, 'afterSheet'],
                        
        ];
    }
    
    public static function afterSheet(AfterSheet $event) 
    {
        //
    }
	
}
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Do note that using a Closure will not be possible in combination with queued imports, as PHP cannot serialize the closure. In those cases it might be better to use the RegistersEventListeners trait.

# Auto register event listeners

By using the RegistersEventListeners trait you can auto-register the event listeners, without the need of using the registerEvents. The listener will only be registered if the method is created.

namespace App\Imports;

use Maatwebsite\Excel\Concerns\Importable;
use Maatwebsite\Excel\Concerns\WithEvents;
use Maatwebsite\Excel\Concerns\RegistersEventListeners;
use Maatwebsite\Excel\Events\BeforeImport;
use Maatwebsite\Excel\Events\AfterImport;
use Maatwebsite\Excel\Events\BeforeSheet;
use Maatwebsite\Excel\Events\AfterSheet;

class UsersImport implements WithEvents
{
    use Importable, RegistersEventListeners;
    
    public static function beforeImport(BeforeImport $event)
    {
        //
    }
	
    public static function afterImport(AfterImport $event)
    {
        //
    }

    public static function beforeSheet(BeforeSheet $event)
    {
        //
    }

    public static function afterSheet(AfterSheet $event)
    {
        //
    }
	
}
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# Global event listeners

Event listeners can also be configured globally, if you want to perform the same actions on all exports in your app. You can add them to e.g. your AppServiceProvider in the register() method.

Reader::listen(BeforeImport::class, function () {
    //
});

Sheet::listen(AfterImport::class, function () {
    //
});

Sheet::listen(BeforeSheet::class, function () {
    //
});

Sheet::listen(AfterSheet::class, function () {
    //
});


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# Available events

Event name Payload Explanation
Maatwebsite\Excel\Events\BeforeImport $event->reader : Reader Event gets raised at the start of the process.
Maatwebsite\Excel\Events\AfterImport $event->reader : Reader Event gets raised at the end of the process.
Maatwebsite\Excel\Events\BeforeSheet $event->sheet : Sheet Event gets raised just after the sheet is created.
Maatwebsite\Excel\Events\AfterSheet $event->sheet : Sheet Event gets raised at the end of the sheet process.

# Macroable

Both Reader and Sheet are "macroable" (which means they can easily be extended to fit your needs). Both Reader and Sheet have a ->getDelegate() method which returns the underlying PhpSpreadsheet class. This will allow you to add custom macros as shortcuts to PhpSpreadsheet methods that are not available in this package.

# Reader

use \Maatwebsite\Excel\Reader;

Reader::macro('setCreator', function (Reader $reader, string $creator) {
    $reader->getDelegate()->getProperties()->setCreator($creator);
});
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# Sheet

use \Maatwebsite\Excel\Sheet;

Sheet::macro('setOrientation', function (Sheet $sheet, $orientation) {
    $sheet->getDelegate()->getPageSetup()->setOrientation($orientation);
});
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For PhpSpreadsheet methods, please refer to their documentation.