Add WopiConfiguration class.

src/Configuration/WopiConfiguration.php

@@ -0,0 +1,47 @@
+<?php
+
+/**
+ * For the full copyright and license information, please view
+ * the LICENSE file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace ChampsLibres\WopiLib\Configuration;
+
+use function array_key_exists;
+
+final class WopiConfiguration implements WopiConfigurationInterface
+{
+    private array $properties;
+
+    public function __construct(array $properties)
+    {
+        $this->properties = $properties;
+    }
+
+    public function jsonSerialize(): array
+    {
+        return $this->properties;
+    }
+
+    public function offsetExists($offset)
+    {
+        return array_key_exists($offset, $this->properties);
+    }
+
+    public function offsetGet($offset)
+    {
+        return $this->properties[$offset];
+    }
+
+    public function offsetSet($offset, $value)
+    {
+        $this->properties[$offset] = $value;
+    }
+
+    public function offsetUnset($offset)
+    {
+        unset($this->properties[$offset]);
+    }
+}

src/Configuration/WopiConfigurationInterface.php

@@ -0,0 +1,17 @@
+<?php
+
+/**
+ * For the full copyright and license information, please view
+ * the LICENSE file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace ChampsLibres\WopiLib\Configuration;
+
+use ArrayAccess;
+use JsonSerializable;
+
+interface WopiConfigurationInterface extends ArrayAccess, JsonSerializable
+{
+}