Version 4.5.0

system/3rd_party/graphql-php/Deferred.php

@@ -0,0 +1,61 @@
+<?php
+namespace GraphQL;
+
+use GraphQL\Executor\Promise\Adapter\SyncPromise;
+
+class Deferred
+{
+    /**
+     * @var \SplQueue
+     */
+    private static $queue;
+
+    /**
+     * @var callable
+     */
+    private $callback;
+
+    /**
+     * @var SyncPromise
+     */
+    public $promise;
+
+    public static function getQueue()
+    {
+        return self::$queue ?: self::$queue = new \SplQueue();
+    }
+
+    public static function runQueue()
+    {
+        $q = self::$queue;
+        while ($q && !$q->isEmpty()) {
+            /** @var self $dfd */
+            $dfd = $q->dequeue();
+            $dfd->run();
+        }
+    }
+
+    public function __construct(callable $callback)
+    {
+        $this->callback = $callback;
+        $this->promise = new SyncPromise();
+        self::getQueue()->enqueue($this);
+    }
+
+    public function then($onFulfilled = null, $onRejected = null)
+    {
+        return $this->promise->then($onFulfilled, $onRejected);
+    }
+
+    private function run()
+    {
+        try {
+            $cb = $this->callback;
+            $this->promise->resolve($cb());
+        } catch (\Exception $e) {
+            $this->promise->reject($e);
+        } catch (\Throwable $e) {
+            $this->promise->reject($e);
+        }
+    }
+}