Initial Commit

dependencies/amphp/byte-stream/lib/OutputBuffer.php

@@ -0,0 +1,43 @@
+<?php
+
+namespace WP_Ultimo\Dependencies\Amp\ByteStream;
+
+use WP_Ultimo\Dependencies\Amp\Deferred;
+use WP_Ultimo\Dependencies\Amp\Promise;
+use WP_Ultimo\Dependencies\Amp\Success;
+class OutputBuffer implements OutputStream, Promise
+{
+    /** @var Deferred */
+    private $deferred;
+    /** @var string */
+    private $contents = '';
+    /** @var bool */
+    private $closed = \false;
+    public function __construct()
+    {
+        $this->deferred = new Deferred();
+    }
+    public function write(string $data) : Promise
+    {
+        if ($this->closed) {
+            throw new ClosedException("The stream has already been closed.");
+        }
+        $this->contents .= $data;
+        return new Success(\strlen($data));
+    }
+    public function end(string $finalData = "") : Promise
+    {
+        if ($this->closed) {
+            throw new ClosedException("The stream has already been closed.");
+        }
+        $this->contents .= $finalData;
+        $this->closed = \true;
+        $this->deferred->resolve($this->contents);
+        $this->contents = "";
+        return new Success(\strlen($finalData));
+    }
+    public function onResolve(callable $onResolved)
+    {
+        $this->deferred->promise()->onResolve($onResolved);
+    }
+}