Added helper service to avoid code duplication when resolving short URLs titles

module/Core/src/ShortUrl/Helper/ShortUrlTitleResolutionHelper.php

@@ -0,0 +1,28 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Shlinkio\Shlink\Core\ShortUrl\Helper;
+
+use Shlinkio\Shlink\Core\Util\UrlValidatorInterface;
+
+class ShortUrlTitleResolutionHelper implements ShortUrlTitleResolutionHelperInterface
+{
+    private UrlValidatorInterface $urlValidator;
+
+    public function __construct(UrlValidatorInterface $urlValidator)
+    {
+        $this->urlValidator = $urlValidator;
+    }
+
+    public function processTitleAndValidateUrl(TitleResolutionModelInterface $data): TitleResolutionModelInterface
+    {
+        if ($data->hasTitle()) {
+            $this->urlValidator->validateUrl($data->getLongUrl(), $data->doValidateUrl());
+            return $data;
+        }
+
+        $title = $this->urlValidator->validateUrlWithTitle($data->getLongUrl(), $data->doValidateUrl());
+        return $title === null ? $data : $data->withResolvedTitle($title);
+    }
+}

module/Core/src/ShortUrl/Helper/ShortUrlTitleResolutionHelperInterface.php

@@ -0,0 +1,15 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Shlinkio\Shlink\Core\ShortUrl\Helper;
+
+use Shlinkio\Shlink\Core\Exception\InvalidUrlException;
+
+interface ShortUrlTitleResolutionHelperInterface
+{
+    /**
+     * @throws InvalidUrlException
+     */
+    public function processTitleAndValidateUrl(TitleResolutionModelInterface $data): TitleResolutionModelInterface;
+}

module/Core/src/ShortUrl/Helper/TitleResolutionModelInterface.php

@@ -0,0 +1,16 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Shlinkio\Shlink\Core\ShortUrl\Helper;
+
+interface TitleResolutionModelInterface
+{
+    public function hasTitle(): bool;
+
+    public function getLongUrl(): string;
+
+    public function doValidateUrl(): ?bool;
+
+    public function withResolvedTitle(string $title): self;
+}