[6.x] add Event Dispatcher to Yii3 Translator

[Anubarak]

In Yii2 we used a custom translation plugin that will basically collect all missing translations via \yii\i18n\MessageSource::EVENT_MISSING_TRANSLATION and added all messages to the DB via https://github.com/yiisoft/yii2/blob/master/framework/i18n/DbMessageSource.php

Now with Yii3 Translate we are going to do exactly the same basically and use https://github.com/yiisoft/translator-message-db to store all translations via DB so clients can freely translate all messages however they want.

However currently you don't add an event dispatcher in your Service Provider

cms/src/Translation/TranslationServiceProvider.php

Lines 19 to 23 in 97f4e4e

	$this->app->singleton(fn (): Translator => new Translator(
	locale: app()->getLocale(),
	fallbackLocale: $this->app->make(ConfigRepository::class)->get('app.fallback_locale'),
	defaultCategory: 'app',
	));

So the "missing translation event" never triggers
https://github.com/yiisoft/translator/blob/012c6de7b70d3dbed8cf9b660e2290cc1743a12f/src/Translator.php#L115-L123

It would be incredibly awesome if you could pass an event dispatcher as a parameter so I can use the event as before
https://github.com/yiisoft/translator/blob/012c6de7b70d3dbed8cf9b660e2290cc1743a12f/src/Translator.php#L38-L43

Thank you very much

Edit: a simple class like this will basically be enough

use Psr\EventDispatcher\EventDispatcherInterface;

class TmpDispatcher implements EventDispatcherInterface
{
    /**
     * @inheritDoc
     */
    public function dispatch(object $event)
    {
        event($event);
    }
}

    #[\Override]
    public function register(): void
    {
        $this->app->singleton(fn (): Translator => new Translator(
            locale: app()->getLocale(),
            fallbackLocale: $this->app->make(ConfigRepository::class)->get('app.fallback_locale'),
            defaultCategory: 'app',
            eventDispatcher: new \TmpDispatcher()
        ));
    }

[riasvdv]

Added! #18952 will go out with the next alpha

[Anubarak]

Awesome, that's really helpful. Thank you so much 👍

[brandonkelly]

6.0.0-alpha.5 is out with that change. Thanks for the suggestion!