eslint: enable extra rules

no-implicit-coercion, no-extra-boolean-cast, no-invalid-this, logical-assignment-operators, no-unmodified-loop-condition

packages/hydrooj/src/handler/contest.ts

@@ -546,7 +546,7 @@ export class ContestManagementHandler extends ContestManagementBaseHandler {
         if (size >= system.get('limit.contest_files_size')) {
             throw new FileLimitExceededError('size');
         }
-        if (!filename) filename = file.originalFilename || String.random(16);
+        filename ||= file.originalFilename || String.random(16);
         if (filename.includes('/') || filename.includes('..')) throw new ValidationError('filename', null, 'Bad filename');
         await storage.put(`contest/${domainId}/${tid}/${filename}`, file.filepath, this.user._id);
         const meta = await storage.getMeta(`contest/${domainId}/${tid}/${filename}`);