Output of getCategories() should be a CategoryCollection

lib/Feed.php

@@ -6,8 +6,8 @@
 declare(strict_types=1);
 namespace JKingWeb\Lax;
 
-use JKingWeb\Lax\Person\Person;
 use JKingWeb\Lax\Person\Collection as PersonCollection;
+use JKingWeb\Lax\Category\Collection as CategoryCollection;
 
 abstract class Feed {
     protected $reqUrl;
@@ -61,7 +61,7 @@ abstract class Feed {
      * 
      * The $humanFriendly parameter only affects Atom categories
     */
-    abstract public function getCategories(): array;
+    abstract public function getCategories(): CategoryCollection;
 
     /** General function to fetch the feed identifier */
     abstract public function getId(): string;

lib/JSON/Feed.php

@@ -8,6 +8,7 @@ namespace JKingWeb\Lax\JSON;
 
 use JKingWeb\Lax\Person\Person;
 use JKingWeb\Lax\Person\Collection as PersonCollection;
+use JKingWeb\Lax\Category\Collection as CategoryCollection;
 
 class Feed extends \JKingWeb\Lax\Feed {
     use Construct;
@@ -52,10 +53,10 @@ class Feed extends \JKingWeb\Lax\Feed {
 
     /** General function to fetch the categories of a feed 
      * 
-     * JSON Feed does not have categories at the feed level, so this always returns an empty array
+     * JSON Feed does not have categories at the feed level, so this always returns an empty collection
     */
-    public function getCategories(bool $grouped = false, bool $humanFriendly = true): array {
-        return [];
+    public function getCategories(): CategoryCollection {
+        return new CategoryCollection;
     }
 
     /** General function to fetch the feed identifier 

lib/XML/Feed.php

@@ -6,8 +6,8 @@
 declare(strict_types=1);
 namespace JKingWeb\Lax\XML;
 
-use JKingWeb\Lax\Person\Person;
 use JKingWeb\Lax\Person\Collection as PersonCollection;
+use JKingWeb\Lax\Category\Collection as CategoryCollection;
 
 class Feed extends \JKingWeb\Lax\Feed {
     use Construct;
@@ -85,8 +85,8 @@ class Feed extends \JKingWeb\Lax\Feed {
      * 
      * The $humanFriendly parameter only affects Atom categories
     */
-    public function getCategories(): array {
-        return $this->getCategoriesAtom() ?? $this->getCategoriesRss2() ?? $this->getCategoriesDC() ?? $this->getCategoriesPod() ?? [];
+    public function getCategories(): CategoryCollection {
+        return $this->getCategoriesAtom() ?? $this->getCategoriesRss2() ?? $this->getCategoriesDC() ?? $this->getCategoriesPod() ?? new CategoryCollection;
     }
 
     /** General function to fetch the feed identifier */