spaces.php

aws/Aws/Endpoint/PatternEndpointProvider.php

@@ -0,0 +1,51 @@
+<?php
+namespace Aws\Endpoint;
+
+/**
+ * Provides endpoints based on an endpoint pattern configuration array.
+ */
+class PatternEndpointProvider
+{
+    /** @var array */
+    private $patterns;
+
+    /**
+     * @param array $patterns Hash of endpoint patterns mapping to endpoint
+     *                        configurations.
+     */
+    public function __construct(array $patterns)
+    {
+        $this->patterns = $patterns;
+    }
+
+    public function __invoke(array $args = [])
+    {
+        $service = isset($args['service']) ? $args['service'] : '';
+        $region = isset($args['region']) ? $args['region'] : '';
+        $keys = ["{$region}/{$service}", "{$region}/*", "*/{$service}", "*/*"];
+
+        foreach ($keys as $key) {
+            if (isset($this->patterns[$key])) {
+                return $this->expand(
+                    $this->patterns[$key],
+                    isset($args['scheme']) ? $args['scheme'] : 'https',
+                    $service,
+                    $region
+                );
+            }
+        }
+
+        return null;
+    }
+
+    private function expand(array $config, $scheme, $service, $region)
+    {
+        $config['endpoint'] = $scheme . '://'
+            . strtr($config['endpoint'], [
+                '{service}' => $service,
+                '{region}'  => $region
+            ]);
+
+        return $config;
+    }
+}