comparison vendor/nikic/php-parser/lib/PhpParser/NodeFinder.php @ 13:5fb285c0d0e3

Update Drupal core to 8.4.7 via Composer. Security update; I *think* we've
been lucky to get away with this so far, as we don't support self-registration
which seems to be used by the so-called "drupalgeddon 2" attack that 8.4.5
was vulnerable to.

+<?php declare(strict_types=1);
+
+namespace PhpParser;
+
+use PhpParser\NodeVisitor\FindingVisitor;
+use PhpParser\NodeVisitor\FirstFindingVisitor;
+
+class NodeFinder
+{
+    /**
+     * Find all nodes satisfying a filter callback.
+     *
+     * @param Node|Node[] $nodes  Single node or array of nodes to search in
+     * @param callable    $filter Filter callback: function(Node $node) : bool
+     *
+     * @return Node[] Found nodes satisfying the filter callback
+     */
+    public function find($nodes, callable $filter) : array {
+        if (!is_array($nodes)) {
+            $nodes = [$nodes];
+        }
+
+        $visitor = new FindingVisitor($filter);
+
+        $traverser = new NodeTraverser;
+        $traverser->addVisitor($visitor);
+        $traverser->traverse($nodes);
+
+        return $visitor->getFoundNodes();
+    }
+
+    /**
+     * Find all nodes that are instances of a certain class.
+     *
+     * @param Node|Node[] $nodes Single node or array of nodes to search in
+     * @param string      $class Class name
+     *
+     * @return Node[] Found nodes (all instances of $class)
+     */
+    public function findInstanceOf($nodes, string $class) : array {
+        return $this->find($nodes, function ($node) use ($class) {
+            return $node instanceof $class;
+        });
+    }
+
+    /**
+     * Find first node satisfying a filter callback.
+     *
+     * @param Node|Node[] $nodes  Single node or array of nodes to search in
+     * @param callable    $filter Filter callback: function(Node $node) : bool
+     *
+     * @return null|Node Found node (or null if none found)
+     */
+    public function findFirst($nodes, callable $filter) {
+        if (!is_array($nodes)) {
+            $nodes = [$nodes];
+        }
+
+        $visitor = new FirstFindingVisitor($filter);
+
+        $traverser = new NodeTraverser;
+        $traverser->addVisitor($visitor);
+        $traverser->traverse($nodes);
+
+        return $visitor->getFoundNode();
+    }
+
+    /**
+     * Find first node that is an instance of a certain class.
+     *
+     * @param Node|Node[] $nodes  Single node or array of nodes to search in
+     * @param string      $class Class name
+     *
+     * @return null|Node Found node, which is an instance of $class (or null if none found)
+     */
+    public function findFirstInstanceOf($nodes, string $class) {
+        return $this->findFirst($nodes, function ($node) use ($class) {
+            return $node instanceof $class;
+        });
+    }
+}