[LIB_REFACTOR] Moving files into separate semantic categories

lib/exceptions/unknownmimeextensionexception.php

@@ -0,0 +1,27 @@
+<?php
+if (!defined('GNUSOCIAL')) { exit(1); }
+
+/**
+ * Class for unknown MIME extension exception
+ *
+ * Thrown when we don't know the file extension for a given MIME type.
+ * This generally means that all files are accepted since if we have
+ * a list of known MIMEs then they have extensions coupled to them.
+ *
+ * @category Exception
+ * @package  GNUsocial
+ * @author   Mikael Nordfeldth <mmn@hethane.se>
+ * @license  https://www.gnu.org/licenses/agpl-3.0.html
+ * @link     https://gnu.io/social
+ */
+
+class UnknownMimeExtensionException extends ServerException
+{
+    public function __construct($mimetype)
+    {
+        // TRANS: We accept the file type (we probably just accept all files)
+        // TRANS: but don't know the file extension for it.
+        $msg = sprintf(_('Supported mimetype but unknown extension relation: %1$s'), _ve($mimetype));
+        parent::__construct($msg);
+    }
+}