Magento 2 : Filter product using search criteria

ProductFilter.php

<?php
namespace MyNamespace\MyModule\Model;

use Magento\Framework\Api\SearchCriteriaBuilder;
use Magento\Catalog\Api\ProductRepositoryInterface;

class ProductFilter
{
    /** @var ProductRepositoryInterface */
    protected $productRepository;

    /** @var SearchCriteriaBuilder */
    protected $searchCriteriaBuilder;

    /**
     * Initialize dependencies.
     *
     * @param ProductRepositoryInterface $productRepository
     * @param SearchCriteriaBuilder $searchCriteriaBuilder
     */
    public function __construct(
        ProductRepositoryInterface $productRepository,
        SearchCriteriaBuilder $searchCriteriaBuilder
    ) {
        $this->productRepository = $productRepository;
        $this->searchCriteriaBuilder = $searchCriteriaBuilder;
    }

    /**
     * Get products with filter.
     * 
     * @param string $fieldName
     * @param string $fieldValue
     * @param string $filterType
     * @return \Magento\Catalog\Api\Data\ProductInterface[]
     */
    public function getProducts($fieldName, $fieldValue, $filterType)
    {
        $searchCriteria = $this->searchCriteriaBuilder->addFilter($fieldName, $fieldValue, $filterType)->create();
        $products = $this->productRepository->getList($searchCriteria);
        return $products->getItems();
    }
}