Extending Laravel's Validator

RedisPresenceVerifier.php

<?php

namespace App\Verifiers;

use Illuminate\Contracts\Redis\Factory;
use Illuminate\Validation\PresenceVerifierInterface;

class RedisPresenceVerifier implements PresenceVerifierInterface
{
    /**
     * The Redis factory implementation.
     *
     * @var \Illuminate\Contracts\Redis\Factory
     */
    protected $redis;
    
    /**
     * Create a new redis presence verifier.
     *
     * @param  \Illuminate\Contracts\Redis\Factory  $redis
     * @return void
     */
    public function __construct(Factory $redis)
    {
        $this->redis = $redis;
    }

    /**
     * Count the number of objects in a collection having the given value.
     *
     * @param  string  $collection
     * @param  string  $column
     * @param  string  $value
     * @param  int|null  $excludeId
     * @param  string|null  $idColumn
     * @param  array  $extra
     * @return int
     */
    public function getCount($collection, $column, $value, $excludeId = null, $idColumn = null, array $extra = [])
    {
        if (! $this->collectionExists($collection)) {
            return -1;
        }

        // Assuming we are working with a list
        $values = $this->redis->lrange($collection, 0, -1);

        return (int) in_array($value, $values);
    }

    /**
     * Count the number of objects in a collection with the given values.
     *
     * @param  string  $collection
     * @param  string  $column
     * @param  array   $values
     * @param  array   $extra
     * @return int
     */
    public function getMultiCount($collection, $column, array $values, array $extra = [])
    {
        if (! $this->collectionExists($collection)) {
            return 0;
        }

        // Assuming we are working with a list
        return count(array_intersect(
            $values,
            $this->redis->lrange($collection, 0, -1)
        ));
    }

    /**
     * Determine if the given key exists.
     * 
     * @param string  $collection
     * @return bool
    */
    protected function collectionExists($collection)
    {
        return $this->redis->exists($collection);
    }

    /**
     * Set the connection to be used.
     *
     * @param  string  $connection
     * @return void
     */
    public function setConnection($connection)
    {
        //
    }
}