From 0684a0649bb270eb1398853d27bf0e1caa869fe6 Mon Sep 17 00:00:00 2001
From: Nathan Lamy <nathan.lamycharrier@gmail.com>
Date: Wed, 30 Jul 2025 18:24:42 +0200
Subject: [PATCH] perf: remove latex extraction from client

---
 app/lib/latex.ts      | 33 ---------------------------------
 app/routes/colles.tsx | 12 ++----------
 2 files changed, 2 insertions(+), 43 deletions(-)
 delete mode 100644 app/lib/latex.ts

diff --git a/app/lib/latex.ts b/app/lib/latex.ts
deleted file mode 100644
index 1c8c7a2..0000000
--- a/app/lib/latex.ts
+++ /dev/null
@@ -1,33 +0,0 @@
-export function extractLatexImages(html: string) {
-  const imgRegex =
-    /<img[^>]+src="(https:\/\/latex\.codecogs\.com\/gif\.latex\?(=?.*?))"[^>]*>/g;
-  let parts = [];
-  let latexMatches: string[] = [];
-  let lastIndex = 0;
-
-  html.replace(imgRegex, (match, _, latex, index) => {
-    parts.push(html.slice(lastIndex, index)); // Add HTML before image
-    latexMatches.push(decodeURIComponent(latex)); // Extract and decode LaTeX
-    lastIndex = index + match.length;
-    return "";
-  });
-
-  parts.push(html.slice(lastIndex)); // Add remaining HTML after last image
-
-  return { parts, latexMatches };
-}
-
-export function renderLatex(html: string) {
-  const { parts, latexMatches } = extractLatexImages(html);
-  const outputHtml = parts
-    .map((part, i) => {
-      if (!latexMatches[i]) {
-        return part;
-      }
-      return `${part}$$${latexMatches[i]}$$`;
-    })
-    .join("");
-  // Remove all "\," from string
-  const regex = /\\,/g;
-  return outputHtml.replace(regex, " ");
-}
diff --git a/app/routes/colles.tsx b/app/routes/colles.tsx
index 49319b3..76e5d88 100644
--- a/app/routes/colles.tsx
+++ b/app/routes/colles.tsx
@@ -1,13 +1,5 @@
 import "katex/dist/katex.min.css";
 import { DomUtils, parseDocument } from "htmlparser2";
-// TODO: API - remove trailing lines from HTML comment/content
-// TODO: Server side image extraction and latex rendering
-// TEMP SOLUTION
-import { renderLatex } from "~/lib/latex"; // Custom LaTeX rendering function
-// function removeTrailingLines(htmlString: string) {
-//   return htmlString.replace(/(<br\s*\/?>\s*)+$/gi, "").trim();
-// }
-
 import Latex from "react-latex-next";
 import { useState } from "react";
 import { Navigate, useNavigate, useParams } from "react-router";
@@ -61,7 +53,7 @@ export default function ColleDetailPage() {
   const [isReloading, setIsReloading] = useState(false);
 
   if (isUserLoading) {
-    return <ColleDetailsSkeleton />
+    return <ColleDetailsSkeleton />;
   }
   if (userError?.message === AUTH_ERROR) {
     return <Navigate to="/login" replace />;
@@ -435,7 +427,7 @@ function ExpandableComment({ comment }: { comment: string }) {
   return (
     <div>
       <Latex delimiters={[{ left: "$$", right: "$$", display: false }]}>
-        {renderLatex(displayedComment)}
+        {displayedComment}
       </Latex>
       {isLongComment && (
         <Button