searchanddisplace-core/app/SearchDisplace/Searchers/Searcher.php

<?php

namespace App\SearchDisplace\Searchers;

class Searcher
{
    protected $searchers;
    protected $content;

    public function __construct($searchers, $content)
    {
        $this->searchers = $searchers;
        $this->content = $content;

        ksort($this->searchers);
    }

    public function execute()
    {
        $mapper = new Mapper();

        $validSearchers = $mapper->getSearchers();

        // The object should contain the searcher name, other info, like the user input.

        $dimensions = [];

        foreach ($this->searchers as $orderNumber => $searcher) {
            if ( ! in_array($searcher['key'], $validSearchers)) {
                throw new \Exception('Invalid searcher: ' . $searcher['key']);
            }

            $dimensions[] = $searcher['key'];
        }

        $duckling = new Duckling();

        return $duckling->execute($this->content, $dimensions);
    }
}