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name : Subscriber.php
 <?php

namespace Statamic\Events;

use Statamic\Support\Str;

abstract class Subscriber
{
    protected $listeners = [];

    /**
     * Register the listeners for the subscriber.
     *
     * @param  \Illuminate\Events\Dispatcher  $events
     */
    public function subscribe($events)
    {
        foreach ($this->getListeners() as $event => $listener) {
            $events->listen($event, $listener);
        }
    }

    /**
     * Get subscribable listeners.
     *
     * @return array
     */
    protected function getListeners()
    {
        if (! $this->listeners) {
            throw new \Exception('No event listeners registered in [$listeners] property!');
        }

        return collect($this->listeners)
            ->map(function ($listener, $event) {
                return is_string($listener) && ! Str::contains($listener, '@')
                    ? [static::class, $listener]
                    : $listener;
            })
            ->all();
    }

    /**
     * Temporarily disable the listeners handled by this subscriber.
     */
    public static function disable()
    {
        foreach ((new static)->getListeners() as $event => $listener) {
            app('events')->forgetListener($event, $listener);
        }
    }

    /**
     * Re-enable the listeners handled by this subscriber.
     */
    public static function enable()
    {
        (new static)->subscribe(app('events'));
    }

    /**
     * Run a callback without triggering listeners handled by this subscriber.
     *
     * @param  \Closure  $callback
     */
    public static function withoutListeners($callback)
    {
        static::disable();

        $callback();

        static::enable();
    }
}
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