Initial import.

vendor/guzzle/http/Guzzle/Http/Message/Header/HeaderCollection.php

@@ -0,0 +1,108 @@
+<?php
+
+namespace Guzzle\Http\Message\Header;
+
+use Guzzle\Common\ToArrayInterface;
+
+/**
+ * Provides a case-insensitive collection of headers
+ */
+class HeaderCollection implements \IteratorAggregate, \Countable, \ArrayAccess, ToArrayInterface
+{
+    /** @var array */
+    protected $headers;
+
+    public function __construct($headers = array())
+    {
+        $this->headers = $headers;
+    }
+
+    public function __clone()
+    {
+        foreach ($this->headers as &$header) {
+            $header = clone $header;
+        }
+    }
+
+    /**
+     * Clears the header collection
+     */
+    public function clear()
+    {
+        $this->headers = array();
+    }
+
+    /**
+     * Set a header on the collection
+     *
+     * @param HeaderInterface $header Header to add
+     *
+     * @return self
+     */
+    public function add(HeaderInterface $header)
+    {
+        $this->headers[strtolower($header->getName())] = $header;
+
+        return $this;
+    }
+
+    /**
+     * Get an array of header objects
+     *
+     * @return array
+     */
+    public function getAll()
+    {
+        return $this->headers;
+    }
+
+    /**
+     * Alias of offsetGet
+     */
+    public function get($key)
+    {
+        return $this->offsetGet($key);
+    }
+
+    public function count()
+    {
+        return count($this->headers);
+    }
+
+    public function offsetExists($offset)
+    {
+        return isset($this->headers[strtolower($offset)]);
+    }
+
+    public function offsetGet($offset)
+    {
+        $l = strtolower($offset);
+
+        return isset($this->headers[$l]) ? $this->headers[$l] : null;
+    }
+
+    public function offsetSet($offset, $value)
+    {
+        $this->add($value);
+    }
+
+    public function offsetUnset($offset)
+    {
+        unset($this->headers[strtolower($offset)]);
+    }
+
+    public function getIterator()
+    {
+        return new \ArrayIterator($this->headers);
+    }
+
+    public function toArray()
+    {
+        $result = array();
+        foreach ($this->headers as $header) {
+            $result[$header->getName()] = $header->toArray();
+        }
+
+        return $result;
+    }
+}