Change PDF reading behavior to not fail completely on Firefox

CHANGELOG.md

@@ -5,6 +5,7 @@
 - Added support for the codeforces.net mirror of Codeforces and fixed support for the codeforc.es mirror on problem pages
 - Fixed the Lanqiao problem parser
 - Fixed the Kattis parser for samples containing only output
+- Changed the behavior of parsers that need to read PDFs (like the ones on UVa Online Judge) to parse as much of the problem as possible on Firefox, rather than crashing due to Firefox bug [1757836](https://bugzilla.mozilla.org/show_bug.cgi?id=1757836)
 
 ## [2.57.1](https://github.com/jmerle/competitive-companion/releases/tag/2.57.1) (2024-11-15)
 - Added the `X-Competitive-Companion` header to HTTP requests sent by Competitive Companion to indicate to the receiving end that the request is coming from Competitive Companion (thanks [@touhidurrr](https://github.com/touhidurrr))

src/utils/pdf.ts

@@ -21,7 +21,21 @@ export async function readPdf(pdfUrl: string): Promise<string[]> {
 
   for (let i = 0; i < pdf._pdfInfo.numPages; i++) {
     const page = await pdf.getPage(i + 1);
-    const textContent = await page.getTextContent();
+
+    let textContent;
+    try {
+      textContent = await page.getTextContent();
+    } catch (err) {
+      if ((err as any)?.message === 'Permission denied to access property "autoAllocateChunkSize"') {
+        console.trace(err);
+        console.warn(
+          'Competitive Companion cannot read PDFs in Firefox due to Firefox bug 1757836: https://bugzilla.mozilla.org/show_bug.cgi?id=1757836',
+        );
+        return [];
+      }
+
+      throw err;
+    }
 
     let currentLine = '';
     let lastX = -1;