first commit

common/resources/client/uploads/utils/get-file-mime.ts

@@ -0,0 +1,30 @@
+import {extensionFromFilename} from './extension-from-filename';
+
+export function getFileMime(file: File): string {
+  const extensionsToMime: Record<string, string> = {
+    md: 'text/markdown',
+    markdown: 'text/markdown',
+    mp4: 'video/mp4',
+    mp3: 'audio/mp3',
+    svg: 'image/svg+xml',
+    jpg: 'image/jpeg',
+    png: 'image/png',
+    gif: 'image/gif',
+    yaml: 'text/yaml',
+    yml: 'text/yaml',
+  };
+
+  const fileExtension = file.name ? extensionFromFilename(file.name) : null;
+
+  // check if mime type is set in the file object
+  if (file.type) {
+    return file.type;
+  }
+
+  // see if we can map extension to a mime type
+  if (fileExtension && fileExtension in extensionsToMime) {
+    return extensionsToMime[fileExtension];
+  }
+
+  return 'application/octet-stream';
+}