PHP code example of cwola / event

    
        
<?php
require_once('vendor/autoload.php');

/* Start to develop here. Best regards https://php-download.com/ */

    

cwola / event example snippets

use Cwola\Event;

class FooEngine implements Event\EventTarget {
    use Event\EventDispatcher;

    public function boot() {
        $this->dispatchEvent('beforeBoot');

        echo 'boot process... wait 10 sec...' . PHP_EOL;
        sleep(10);

        $this->dispatchEvent('booted');
    }
}

$engine = new FooEngine;
$engine->addEventListener('beforeBoot', function(Event\Event $event) {
    echo sprintf('%s : start boot method.', $event->timeStamp) . PHP_EOL;
});
$engine->addEventListener('booted', function(Event\Event $event) {
    echo sprintf('%s : end boot method.', $event->timeStamp) . PHP_EOL;
});
$engine->boot();
// output
// 2022-08-22T23:32:51+09:00 : start boot method.
// boot process... wait 10 sec...
// 2022-08-22T23:33:01+09:00 : end boot method.
//

use Cwola\Event;

class FooEngine implements Event\EventTarget {
    use Event\EventDispatcher;

    public function boot() {
        $this->dispatchEvent('beforeBoot');

        echo 'boot process... wait 10 sec...' . PHP_EOL;
        sleep(10);

        $this->dispatchEvent('booted');
    }
}

$engine = new FooEngine;
$engine->addEventListener('beforeBoot', function(Event\Event $event) {
    echo sprintf('%s : start boot method.', $event->timeStamp) . PHP_EOL;
});
$bootEnd = function(Event\Event $event) {
    echo sprintf('%s : end boot method.', $event->timeStamp) . PHP_EOL;
};
$removableListener = function(Event\Event $event) {
    echo 'not reached' . PHP_EOL;
};
$engine->addEventListener('booted', $bootEnd, ['removable' => false]);
$engine->addEventListener('booted', $removableListener);
$engine->removeEventListener('booted', $bootEnd);
$engine->removeEventListener('booted', $removableListener);

$engine->boot();
// output
// 2022-08-22T23:32:51+09:00 : start boot method.
// boot process... wait 10 sec...
// 2022-08-22T23:33:01+09:00 : end boot method.
//

use Cwola\Event;

class FooEngine implements Event\EventTarget {
    use Event\EventDispatcher;

    public function __construct() {
        $this->addEventListener('initialize', function(Event\Event $event) {
            $this->init();
            // equals $event->target->init();
        }, ['once' => true]);
    }

    public function boot() {
        $this->dispatchEvent('initialize');

        $this->dispatchEvent('beforeBoot');

        echo 'boot process... wait 10 sec...' . PHP_EOL;
        sleep(10);

        $this->dispatchEvent('booted');
    }

    protected function init() {
        echo 'init...' . PHP_EOL;
    }
}

$engine = new FooEngine;

$engine->addEventListener('beforeBoot', function(Event\Event $event) {
    echo sprintf('%s : start boot method.', $event->timeStamp) . PHP_EOL;
});
$engine->addEventListener('booted', function(Event\Event $event) {
    echo sprintf('%s : end boot method.', $event->timeStamp) . PHP_EOL;
    $event->stopPropagation();
});
$engine->addEventListener('booted', function(Event\Event $event) {
    // not reached.
    echo 'not reached' . PHP_EOL;
});

$engine->boot();
// output
// init...
// 2022-08-22T23:32:51+09:00 : start boot method.
// boot process... wait 10 sec...
// 2022-08-22T23:33:01+09:00 : end boot method.
//

$engine->boot();
// output
// 2022-08-22T23:33:01+09:00 : start boot method.
// boot process... wait 10 sec...
// 2022-08-22T23:33:11+09:00 : end boot method.
//

use Cwola\Event;

class FooEngineBootedEvent extends Event\Event {
    /**
     * {@inheritDoc}
     */
    protected bool $cancelable = false;

    /**
     * {@inheritDoc}
     */
    public function handleDefault(): void {
        echo 'Installation Engine completed all steps successfully.' . PHP_EOL;
    }
}

class FooEngineEventFactory extends Event\Factory\EventFactory {
    /**
     * {@inheritDoc}
     */
    public static function create(
        string $type,
        Event\EventTarget $target,
        array|Event\Listener\Options $options = []
    ) :Event\Event {
        if ($type === 'booted') {
            return new FooEngineBootedEvent(
                $type,
                $target
            );
        }
        return parent::create($type, $target, $options);
    }
}

class FooEngine implements Event\EventTarget {
    use Event\EventDispatcher;

    public function __construct() {
        $this->eventFactory = new FooEngineEventFactory;
    }

    public function boot() {
        $this->dispatchEvent('beforeBoot');

        echo 'boot process... wait 10 sec...' . PHP_EOL;
        sleep(10);

        $this->dispatchEvent('booted');
    }
}

$engine = new FooEngine;
$engine->addEventListener('beforeBoot', function(Event\Event $event) {
    echo sprintf('%s : start boot method.', $event->timeStamp) . PHP_EOL;
});
$engine->addEventListener('booted', function(Event\Event $event) {
    echo sprintf('%s : end boot method.', $event->timeStamp) . PHP_EOL;
    $event->preventDefault();
    // 'cancelable' property of 'FooEngineBootedEvent' is false,
    // the default behavior cannot be prevented.
    //
});


$engine->boot();
// output
// 2022-08-22T23:32:51+09:00 : start boot method.
// boot process... wait 10 sec...
// 2022-08-22T23:33:01+09:00 : end boot method.
// Installation Engine completed all steps successfully.
//

use Cwola\Event;

class FooEngine implements Event\EventTarget {
    use Event\EventDispatcher;

    public function boot() {
        $this->dispatchEvent('beforeBoot');

        echo 'boot process... wait 10 sec...' . PHP_EOL;
        sleep(10);

        $this->dispatchEvent('booted');
    }
}

$abortController = new Event\Signal\Controller\AbortController;
$signal = $abortController->signal;
$signal->addEventListener('abort', function(Event\Event $event) {
    echo 'No notification during the night.' . PHP_EOL;
});

$engine = new FooEngine;
$engine->addEventListener('beforeBoot', function(Event\Event $event) {
    echo sprintf('%s : start boot method.', $event->timeStamp) . PHP_EOL;
});
$engine->addEventListener('booted', function(Event\Event $event) use ($abortController) {
    echo sprintf('%s : end boot method.', $event->timeStamp) . PHP_EOL;
    // No notification during the night.
    if (isNight()) {
        $abortController->abort();
    }
}); 
$engine->addEventListener('booted', function(Event\Event $event) {
    echo 'notify...' . PHP_EOL;
}, ['signal' => $signal]);


$engine->boot();
// output
// 2022-08-22T23:32:51+09:00 : start boot method.
// boot process... wait 10 sec...
// 2022-08-22T23:33:01+09:00 : end boot method.
// No notification during the night.
//

use Cwola\Event;

class FooEngine implements Event\EventTarget {
    use Event\EventDispatcher;

    public function boot() {
        $this->dispatchEvent('beforeBoot');

        echo 'boot process... wait 10 sec...' . PHP_EOL;
        sleep(10);

        $this->dispatchEvent('booted');
    }
}

$suspendController = new Event\Signal\Controller\SuspendController;
$signal = $suspendController->signal;
$signal->addEventListener('suspend', function(Event\Event $event) {
    echo \sprintf('on suspend (%s).', $event->target->reason) . PHP_EOL;
});
$signal->addEventListener('resume', function(Event\Event $event) {
    echo 'on resume.' . PHP_EOL;
});

$engine = new FooEngine;
$engine->addEventListener('beforeBoot', function(Event\Event $event) {
    echo sprintf('%s : start boot method.', $event->timeStamp) . PHP_EOL;
}, ['signal' => $signal]);
$engine->addEventListener('booted', function(Event\Event $event) {
    echo sprintf('%s : end boot method.', $event->timeStamp) . PHP_EOL;
}, ['signal' => $signal]);
$engine->addEventListener('booted', function(Event\Event $event) {
    echo 'notify...' . PHP_EOL;
}, ['signal' => $signal]);

$suspendController->suspend('test');
// output
// on suspend (test).
//

$engine->boot();
// output
// boot process... wait 10 sec...
//

$suspendController->resume();
// output
// on resume.
//

$engine->boot();
// output
// 2022-08-22T23:32:51+09:00 : start boot method.
// boot process... wait 10 sec...
// 2022-08-22T23:33:01+09:00 : end boot method.
// notify...
//