Refactor handling of environment variables (#2303)

* Refactor environment variables

Signed-off-by: Tilman Vatteroth <git@tilmanvatteroth.de>

src/pages/api/private/media.ts

@@ -0,0 +1,33 @@
+/*
+ * SPDX-FileCopyrightText: 2022 The HedgeDoc developers (see AUTHORS file)
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import type { NextApiRequest, NextApiResponse } from 'next'
+import type { MediaUpload } from '../../../api/media/types'
+import { HttpMethod, respondToMatchingRequest } from '../../../handler-utils/respond-to-matching-request'
+import { isMockMode, isTestMode } from '../../../utils/test-modes'
+
+const handler = async (req: NextApiRequest, res: NextApiResponse): Promise<void> => {
+  if (isMockMode && !isTestMode) {
+    await new Promise((resolve) => {
+      setTimeout(resolve, 3000)
+    })
+  }
+
+  respondToMatchingRequest<MediaUpload>(
+    HttpMethod.POST,
+    req,
+    res,
+    {
+      url: 'public/img/avatar.png',
+      noteId: null,
+      username: 'test',
+      createdAt: '2022-02-27T21:54:23.856Z'
+    },
+    201
+  )
+}
+
+export default handler