runff 1.0 commit

lib/aws/Aws/S3/Crypto/HeadersMetadataStrategy.php

@@ -0,0 +1,52 @@
+<?php
+namespace Aws\S3\Crypto;
+
+use \Aws\Crypto\MetadataStrategyInterface;
+use \Aws\Crypto\MetadataEnvelope;
+
+class HeadersMetadataStrategy implements MetadataStrategyInterface
+{
+    /**
+     * Places the information in the MetadataEnvelope in to the Meatadata for
+     * the PutObject request of the encrypted object.
+     *
+     * @param MetadataEnvelope $envelope Encryption data to save according to
+     *                                   the strategy.
+     * @param array $args Arguments for PutObject that can be manipulated to
+     *                    store strategy related information.
+     *
+     * @return array Updated arguments for PutObject.
+     */
+    public function save(MetadataEnvelope $envelope, array $args)
+    {
+        foreach ($envelope as $header=>$value) {
+            $args['Metadata'][$header] = $value;
+        }
+
+        return $args;
+    }
+
+    /**
+     * Generates a MetadataEnvelope according to the Metadata headers from the
+     * GetObject result.
+     *
+     * @param array $args Arguments from Command and Result that contains
+     *                    S3 Object information, relevant headers, and command
+     *                    configuration.
+     *
+     * @return MetadataEnvelope
+     */
+    public function load(array $args)
+    {
+        $envelope = new MetadataEnvelope();
+        $constantValues = MetadataEnvelope::getConstantValues();
+
+        foreach ($constantValues as $constant) {
+            if (!empty($args['Metadata'][$constant])) {
+                $envelope[$constant] = $args['Metadata'][$constant];
+            }
+        }
+
+        return $envelope;
+    }
+}