Version 4.5.0

system/3rd_party/graphql-php/Utils/PairSet.php

@@ -0,0 +1,87 @@
+<?php
+namespace GraphQL\Utils;
+
+/**
+ * Class PairSet
+ * @package GraphQL\Utils
+ */
+class PairSet
+{
+    /**
+     * @var \SplObjectStorage<any, Set<any>>
+     */
+    private $data;
+
+    /**
+     * @var array
+     */
+    private $wrappers = [];
+
+    /**
+     * PairSet constructor.
+     */
+    public function __construct()
+    {
+        $this->data = new \SplObjectStorage(); // SplObject hash instead?
+    }
+
+    /**
+     * @param $a
+     * @param $b
+     * @return null|object
+     */
+    public function has($a, $b)
+    {
+        $a = $this->toObj($a);
+        $b = $this->toObj($b);
+
+        /** @var \SplObjectStorage $first */
+        $first = isset($this->data[$a]) ? $this->data[$a] : null;
+        return isset($first, $first[$b]) ? $first[$b] : null;
+    }
+
+    /**
+     * @param $a
+     * @param $b
+     */
+    public function add($a, $b)
+    {
+        $this->pairSetAdd($a, $b);
+        $this->pairSetAdd($b, $a);
+    }
+
+    /**
+     * @param $var
+     * @return mixed
+     */
+    private function toObj($var)
+    {
+        // SplObjectStorage expects objects, so wrapping non-objects to objects
+        if (is_object($var)) {
+            return $var;
+        }
+        if (!isset($this->wrappers[$var])) {
+            $tmp = new \stdClass();
+            $tmp->_internal = $var;
+            $this->wrappers[$var] = $tmp;
+        }
+        return $this->wrappers[$var];
+    }
+
+    /**
+     * @param $a
+     * @param $b
+     */
+    private function pairSetAdd($a, $b)
+    {
+        $a = $this->toObj($a);
+        $b = $this->toObj($b);
+        $set = isset($this->data[$a]) ? $this->data[$a] : null;
+
+        if (!isset($set)) {
+            $set = new \SplObjectStorage();
+            $this->data[$a] = $set;
+        }
+        $set[$b] = true;
+    }
+}