From 7b158eb19224b399ec5859d523ba96309166e15c Mon Sep 17 00:00:00 2001
From: Alzer Del Zeyger <75466035+Dx-Alz-xD@users.noreply.github.com>
Date: Wed, 11 Nov 2026 22:01:48 +0530
Subject: [PATCH] fix(subject): stop showing BMAT102L for subjects without a
 course code

extractBracketContent fell back to BMAT102L when a subject had no code in
brackets, so cards showed it and downloads were named after it. it now
returns null, the card leaves the code out, and file names use the
subject name instead
---
 src/app/paper/[id]/page.tsx | 4 ++--
 src/lib/utils/download.ts   | 4 ++--
 src/lib/utils/string.ts     | 6 +++++-
 3 files changed, 9 insertions(+), 5 deletions(-)

diff --git a/src/app/paper/[id]/page.tsx b/src/app/paper/[id]/page.tsx
index 7e8fba2b..a0002080 100644
--- a/src/app/paper/[id]/page.tsx
+++ b/src/app/paper/[id]/page.tsx
@@ -2,7 +2,7 @@ import { fetchPaperID } from "@/app/actions/get-papers-by-id";
 import RelatedPapers from "@/components/RelatedPaper";
 import Loader from "@/components/ui/loader";
 import { type ErrorResponse, type PaperResponse } from "@/interface";
-import { extractBracketContent } from "@/lib/utils/string";
+import { courseCodeOrName } from "@/lib/utils/string";
 import axios, { type AxiosResponse } from "axios";
 import { type Metadata } from "next";
 import { redirect } from "next/navigation";
@@ -177,7 +177,7 @@ const PaperPage = async ({ params }: { params: { id: string } }) => {
 
             <PDFViewer
               url={paper.file_url}
-              name={`${extractBracketContent(paper.subject)}-${paper.exam}-${paper.slot}-${paper.year}`}/>
+              name={`${courseCodeOrName(paper.subject)}-${paper.exam}-${paper.slot}-${paper.year}`}/>
             
             {/* <PdfViewer
               url={paper.file_url}
diff --git a/src/lib/utils/download.ts b/src/lib/utils/download.ts
index 5d02d102..a623503f 100644
--- a/src/lib/utils/download.ts
+++ b/src/lib/utils/download.ts
@@ -1,5 +1,5 @@
 import { type IPaper } from "../../interface";
-import { extractBracketContent } from "./string";
+import { courseCodeOrName } from "./string";
 import axios from "axios";
 import toast from "react-hot-toast";
 
@@ -8,7 +8,7 @@ export const getSecureUrl = (url: string): string =>
 
 export const generateFileName = (paper: IPaper): string => {
   const extension = paper.file_url.split(".").pop();
-  return `${extractBracketContent(paper.subject)}-${paper.exam}-${paper.slot}-${paper.year}.${extension}`;
+  return `${courseCodeOrName(paper.subject)}-${paper.exam}-${paper.slot}-${paper.year}.${extension}`;
 };
 
 export const downloadFile = async (
diff --git a/src/lib/utils/string.ts b/src/lib/utils/string.ts
index 63daa3c7..a116b67d 100644
--- a/src/lib/utils/string.ts
+++ b/src/lib/utils/string.ts
@@ -16,9 +16,13 @@ export function toSentenceCase(input: string): string {
 export function extractBracketContent(subject: string): string | null {
   const regex = /\[(.*?)\]/;
   const match = regex.exec(subject);
-  return match?.[1] ?? "BMAT102L";
+  return match?.[1] ?? null;
 }
 
 export function extractWithoutBracketContent(subject: string): string {
   return subject.replace(/\s*\[.*?\]\s*/g, "").trim();
+}
+
+export function courseCodeOrName(subject: string): string {
+  return extractBracketContent(subject) ?? extractWithoutBracketContent(subject);
 }
\ No newline at end of file