Migrate RainLoop Webmail to use Facebook Graph API instead of FQL

rainloop/v/0.0.0/app/libraries/GuzzleHttp/Adapter/TransactionIterator.php

@@ -0,0 +1,73 @@
+<?php
+
+namespace GuzzleHttp\Adapter;
+
+use GuzzleHttp\ClientInterface;
+use GuzzleHttp\Event\ListenerAttacherTrait;
+use GuzzleHttp\Message\RequestInterface;
+
+/**
+ * Converts a sequence of request objects into a transaction.
+ * @internal
+ */
+class TransactionIterator implements \Iterator
+{
+    use ListenerAttacherTrait;
+
+    /** @var \Iterator */
+    private $source;
+
+    /** @var ClientInterface */
+    private $client;
+
+    /** @var array Listeners to attach to each request */
+    private $eventListeners = [];
+
+    public function __construct(
+        $source,
+        ClientInterface $client,
+        array $options
+    ) {
+        $this->client = $client;
+        $this->eventListeners = $this->prepareListeners(
+            $options,
+            ['before', 'complete', 'error']
+        );
+        if ($source instanceof \Iterator) {
+            $this->source = $source;
+        } elseif (is_array($source)) {
+            $this->source = new \ArrayIterator($source);
+        } else {
+            throw new \InvalidArgumentException('Expected an Iterator or array');
+        }
+    }
+
+    public function current()
+    {
+        $request = $this->source->current();
+        if (!$request instanceof RequestInterface) {
+            throw new \RuntimeException('All must implement RequestInterface');
+        }
+
+        $this->attachListeners($request, $this->eventListeners);
+
+        return new Transaction($this->client, $request);
+    }
+
+    public function next()
+    {
+        $this->source->next();
+    }
+
+    public function key()
+    {
+        return $this->source->key();
+    }
+
+    public function valid()
+    {
+        return $this->source->valid();
+    }
+
+    public function rewind() {}
+}