Implement the NodeInterface::remove() method.

Author: drupol

spec/drupol/phptree/Node/NodeSpec.php

@@ -21,6 +21,25 @@ public function it_can_add(NodeInterface $node)
             ->shouldReturn($this);
     }
 
+    public function it_can_remove()
+    {
+        $node1 = new Node();
+        $node2 = new Node();
+
+        $this
+            ->add($node1, $node2);
+
+        $this
+            ->remove($node2);
+
+        $this->children()[0]->shouldReturn($node1);
+
+        $this
+            ->remove($node1);
+
+        $this->children()->shouldReturn([]);
+    }
+
     public function it_can_get_the_size()
     {
         $nodes = [];

src/Node/Node.php

@@ -30,7 +30,7 @@ public function __construct(NodeInterface $parent = null)
     /**
      * {@inheritdoc}
      */
-    public function add(NodeInterface ...$nodes)
+    public function add(NodeInterface ...$nodes): NodeInterface
     {
         foreach ($nodes as $node) {
             $this->storage['children'][] = $node->setParent($this);
@@ -39,6 +39,21 @@ public function add(NodeInterface ...$nodes)
         return $this;
     }
 
+    /**
+     * {@inheritdoc}
+     */
+    public function remove(NodeInterface ...$nodes): NodeInterface
+    {
+        $this->storage['children'] = \array_filter(
+            $this->storage['children'],
+            function ($child) use ($nodes) {
+                return !\in_array($child, $nodes, true);
+            }
+        );
+
+        return $this;
+    }
+
     /**
      * {@inheritdoc}
      */

src/Node/NodeInterface.php

@@ -24,9 +24,16 @@ public function setParent(NodeInterface $node): NodeInterface;
     /**
      * @param \drupol\phptree\Node\NodeInterface ...$node
      *
-     * @return mixed
+     * @return \drupol\phptree\Node\NodeInterface
+     */
+    public function add(NodeInterface ...$node): NodeInterface;
+
+    /**
+     * @param \drupol\phptree\Node\NodeInterface ...$node
+     *
+     * @return \drupol\phptree\Node\NodeInterface
      */
-    public function add(NodeInterface ...$node);
+    public function remove(NodeInterface ...$node): NodeInterface;
 
     /**
      * @return NodeInterface[]