FEATURE: Render copyrightNotice from configured template

Renders and returns the copyright notice according to
unsplashs guidelines. This data is stored in the asset
model in Neos >= 4.2

Classes/AssetSource/UnsplashAssetProxy.php

@@ -10,6 +10,8 @@
  */
 
 use Neos\Flow\Annotations as Flow;
+use Neos\Eel\EelEvaluatorInterface;
+use Neos\Eel\Utility;
 use Behat\Transliterator\Transliterator;
 use Crew\Unsplash\Photo;
 use Neos\Flow\Http\Uri;
@@ -43,6 +45,18 @@ final class UnsplashAssetProxy implements AssetProxyInterface, HasRemoteOriginal
      */
     private $iptcProperties;
 
+    /**
+     * @var array
+     * @Flow\InjectConfiguration(path="defaultContext", package="Neos.Fusion")
+     */
+    protected $defaultContextConfiguration;
+
+    /**
+     * @var EelEvaluatorInterface
+     * @Flow\Inject(lazy=false)
+     */
+    protected $eelEvaluator;
+
     /**
      * UnsplashAssetProxy constructor.
      * @param Photo $photo
@@ -230,6 +244,7 @@ protected function getImageUrl(string $size): string
      *
      * @param string $propertyName
      * @return bool
+     * @throws \Neos\Eel\Exception
      */
     public function hasIptcProperty(string $propertyName): bool
     {
@@ -241,6 +256,7 @@ public function hasIptcProperty(string $propertyName): bool
      *
      * @param string $propertyName
      * @return string
+     * @throws \Neos\Eel\Exception
      */
     public function getIptcProperty(string $propertyName): string
     {
@@ -251,17 +267,28 @@ public function getIptcProperty(string $propertyName): string
      * Returns all known IPTC metadata properties as key => value (e.g. "Title" => "My Photo")
      *
      * @return array
+     * @throws \Neos\Eel\Exception
      */
     public function getIptcProperties(): array
     {
         if ($this->iptcProperties === null) {
             $this->iptcProperties = [
                 'Title' => $this->getLabel(),
-                'CopyrightNotice' => sprintf('Photo by %s on Unsplash', $this->photo->user['name']),
+                'CopyrightNotice' => $this->compileCopyrightNotice($this->photo->user),
                 'Creator' => $this->photo->user['name']
             ];
         }
 
         return $this->iptcProperties;
     }
+
+    /**
+     * @param array $userProperties
+     * @return string
+     * @throws \Neos\Eel\Exception
+     */
+    protected function compileCopyrightNotice(array $userProperties): string
+    {
+        return Utility::evaluateEelExpression($this->assetSource->getCopyRightNoticeTemplate(), $this->eelEvaluator, ['user' => $userProperties], $this->defaultContextConfiguration);
+    }
 }

Classes/AssetSource/UnsplashAssetSource.php

@@ -27,6 +27,11 @@ final class UnsplashAssetSource implements AssetSourceInterface
      */
     private $assetProxyRepository;
 
+    /**
+     * @var string
+     */
+    private $copyRightNoticeTemplate;
+
     /**
      * UnsplashAssetSource constructor.
      * @param string $assetSourceIdentifier
@@ -36,9 +41,10 @@ final class UnsplashAssetSource implements AssetSourceInterface
     public function __construct(string $assetSourceIdentifier, array $assetSourceOptions)
     {
         $this->assetSourceIdentifier = $assetSourceIdentifier;
+        $this->copyRightNoticeTemplate = $assetSourceOptions['copyRightNoticeTemplate'] ?? '';
 
         if (!isset($assetSourceOptions['accessKey']) || trim($assetSourceOptions['accessKey']) === '') {
-            throw new InvalidConfigurationException(sprintf('Access Key for the %s data source not set.',$this->getLabel()), 1526326192);
+            throw new InvalidConfigurationException(sprintf('Access Key for the %s data source not set.', $this->getLabel()), 1526326192);
         }
 
         Unsplash\HttpClient::init([
@@ -54,6 +60,7 @@ public function __construct(string $assetSourceIdentifier, array $assetSourceOpt
      * @param string $assetSourceIdentifier
      * @param array $assetSourceOptions
      * @return AssetSourceInterface
+     * @throws InvalidConfigurationException
      */
     public static function createFromConfiguration(string $assetSourceIdentifier, array $assetSourceOptions): AssetSourceInterface
     {
@@ -79,6 +86,14 @@ public function getLabel(): string
         return 'Unsplash';
     }
 
+    /**
+     * @return string
+     */
+    public function getCopyRightNoticeTemplate(): string
+    {
+        return $this->copyRightNoticeTemplate;
+    }
+
     /**
      * @return AssetProxyRepositoryInterface
      */

Configuration/Settings.yaml

@@ -6,3 +6,4 @@ Neos:
         assetSourceOptions:
           accessKey: your-access-key
           utmSource: 'Neos CMS Unsplash Asset Source https://neos.io'
+          copyRightNoticeTemplate: '${"Photo by <a href=\"https://unsplash.com/" + user.username + "\">" + user.name + "</a> on <a href=\"https://unsplash.com\">Unsplash</a>"}'