fix: add some changes to fixing self link on related responses

Author: lindyhopchris

src/Core/Document/Links.php

@@ -191,12 +191,23 @@ public function hasRelated(): bool
         return $this->has('related');
     }
 
+    /**
+     * @return $this
+     */
     public function relatedAsSelf(): self
     {
-        if($this->forget('self')->hasRelated()){
-            $this->push(Link::fromArray('self', $this->getRelated()->toArray()));
+        $related = $this->getRelated();
+
+        if ($related) {
+            $this->push(new Link(
+                key: 'self',
+                href: $related->href(),
+                meta: $related->meta(),
+            ));
+            return $this->forget('related');
         }
-        return $this->forget('related');
+
+        return $this->forget('self');
     }
 
     /**

src/Core/Responses/Internal/RelatedResourceCollectionResponse.php

@@ -60,7 +60,7 @@ public function toResponse($request)
             ->withResources($this->related)
             ->withJsonApi($this->jsonApi())
             ->withMeta($this->allMeta())
-            ->withLinks($this->allLinks()->relatedAsSelf())
+            ->withLinks($this->allLinks())
             ->toJson($this->encodeOptions);
 
         return new Response(
@@ -69,4 +69,17 @@ public function toResponse($request)
             $this->headers()
         );
     }
+
+    /**
+     * Get all links.
+     *
+     * @return Links
+     */
+    private function allLinks(): Links
+    {
+        return $this
+            ->linksForRelationship()
+            ->relatedAsSelf()
+            ->merge($this->links());
+    }
 }

src/Core/Responses/Internal/RelatedResourceResponse.php

@@ -61,7 +61,7 @@ public function toResponse($request)
             ->withResource($this->related)
             ->withJsonApi($this->jsonApi())
             ->withMeta($this->allMeta())
-            ->withLinks($this->allLinks()->relatedAsSelf())
+            ->withLinks($this->allLinks())
             ->toJson($this->encodeOptions);
 
         return new Response(
@@ -70,4 +70,17 @@ public function toResponse($request)
             $this->headers()
         );
     }
+
+    /**
+     * Get all links.
+     *
+     * @return Links
+     */
+    private function allLinks(): Links
+    {
+        return $this
+            ->linksForRelationship()
+            ->relatedAsSelf()
+            ->merge($this->links());
+    }
 }