refactor: tidy structure of source files

Fixes #79

src/protocol/errors/internal-server-error.ts

@@ -0,0 +1,41 @@
+/*
+ * Copyright (C) 2019 StApps
+ * This program is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation, version 3.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+import {BAD_GATEWAY} from 'http-status-codes';
+import {SCError} from '../error';
+
+/**
+ * An error that is returned, when an internal server error occurred
+ */
+export class SCInternalServerErrorResponse extends SCError {
+  /**
+   * Internal error that occurred. If the stack is disabled this error is not set for security reasons
+   */
+  additionalData?: Error;
+
+  /**
+   * Create a SCInternalServerErrorResponse
+   *
+   * @param err Internal server error
+   * @param stack Set to true if a stack trace should be created
+   * and the internal server error should be displayed to the client
+   */
+  constructor(err?: Error, stack = false) {
+    super('InternalServerError', 'Internal server error', BAD_GATEWAY, stack);
+
+    if (stack) {
+      this.additionalData = err;
+    }
+  }
+}