Version 4.6.0

system/3rd_party/graphql-php/Executor/Promise/Adapter/AmpPromiseAdapter.php

@@ -0,0 +1,147 @@
+<?php
+
+declare(strict_types=1);
+
+namespace GraphQL\Executor\Promise\Adapter;
+
+use Amp\Deferred;
+use Amp\Failure;
+use Amp\Promise as AmpPromise;
+use Amp\Success;
+use GraphQL\Executor\Promise\Promise;
+use GraphQL\Executor\Promise\PromiseAdapter;
+use Throwable;
+use function Amp\Promise\all;
+use function array_replace;
+
+class AmpPromiseAdapter implements PromiseAdapter
+{
+    /**
+     * @inheritdoc
+     */
+    public function isThenable($value) : bool
+    {
+        return $value instanceof AmpPromise;
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function convertThenable($thenable) : Promise
+    {
+        return new Promise($thenable, $this);
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function then(Promise $promise, ?callable $onFulfilled = null, ?callable $onRejected = null) : Promise
+    {
+        $deferred  = new Deferred();
+        $onResolve = static function (?Throwable $reason, $value) use ($onFulfilled, $onRejected, $deferred) : void {
+            if ($reason === null && $onFulfilled !== null) {
+                self::resolveWithCallable($deferred, $onFulfilled, $value);
+            } elseif ($reason === null) {
+                $deferred->resolve($value);
+            } elseif ($onRejected !== null) {
+                self::resolveWithCallable($deferred, $onRejected, $reason);
+            } else {
+                $deferred->fail($reason);
+            }
+        };
+
+        /** @var AmpPromise $adoptedPromise */
+        $adoptedPromise = $promise->adoptedPromise;
+        $adoptedPromise->onResolve($onResolve);
+
+        return new Promise($deferred->promise(), $this);
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function create(callable $resolver) : Promise
+    {
+        $deferred = new Deferred();
+
+        $resolver(
+            static function ($value) use ($deferred) : void {
+                $deferred->resolve($value);
+            },
+            static function (Throwable $exception) use ($deferred) : void {
+                $deferred->fail($exception);
+            }
+        );
+
+        return new Promise($deferred->promise(), $this);
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function createFulfilled($value = null) : Promise
+    {
+        $promise = new Success($value);
+
+        return new Promise($promise, $this);
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function createRejected($reason) : Promise
+    {
+        $promise = new Failure($reason);
+
+        return new Promise($promise, $this);
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function all(array $promisesOrValues) : Promise
+    {
+        /** @var AmpPromise[] $promises */
+        $promises = [];
+        foreach ($promisesOrValues as $key => $item) {
+            if ($item instanceof Promise) {
+                $promises[$key] = $item->adoptedPromise;
+            } elseif ($item instanceof AmpPromise) {
+                $promises[$key] = $item;
+            }
+        }
+
+        $deferred = new Deferred();
+
+        $onResolve = static function (?Throwable $reason, ?array $values) use ($promisesOrValues, $deferred) : void {
+            if ($reason === null) {
+                $deferred->resolve(array_replace($promisesOrValues, $values));
+
+                return;
+            }
+
+            $deferred->fail($reason);
+        };
+
+        all($promises)->onResolve($onResolve);
+
+        return new Promise($deferred->promise(), $this);
+    }
+
+    private static function resolveWithCallable(Deferred $deferred, callable $callback, $argument) : void
+    {
+        try {
+            $result = $callback($argument);
+        } catch (Throwable $exception) {
+            $deferred->fail($exception);
+
+            return;
+        }
+
+        if ($result instanceof Promise) {
+            $result = $result->adoptedPromise;
+        }
+
+        $deferred->resolve($result);
+    }
+}