feat: Add NETSCAPE-Bookmark-file-1 export format support (#1374)

* Add function to export bookmarks in NETSCAPE-Bookmark-file-1 format

* Update export endpoint to support NETSCAPE format

* Add format selection to export UI

* include tags in the export

---------

Co-authored-by: Mohamed Bassem <me@mbassem.com>

1 files changed, 49 insertions, 0 deletions

diff --git a/apps/web/lib/exportBookmarks.ts b/apps/web/lib/exportBookmarks.ts
index 45db104f..67b0b5da 100644
--- a/apps/web/lib/exportBookmarks.ts
+++ b/apps/web/lib/exportBookmarks.ts
@@ -58,3 +58,52 @@ export function toExportFormat(
     note: bookmark.note ?? null,
   };
 }
+
+export function toNetscapeFormat(bookmarks: ZBookmark[]): string {
+  const header = `<!DOCTYPE NETSCAPE-Bookmark-file-1>
+<!-- This is an automatically generated file.
+     It will be read and overwritten.
+     DO NOT EDIT! -->
+<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=UTF-8">
+<TITLE>Bookmarks</TITLE>
+<H1>Bookmarks</H1>
+<DL><p>`;
+
+  const footer = `</DL><p>`;
+
+  const bookmarkEntries = bookmarks
+    .map((bookmark) => {
+      if (bookmark.content?.type !== BookmarkTypes.LINK) {
+        return "";
+      }
+      const addDate = bookmark.createdAt
+        ? `ADD_DATE="${Math.floor(bookmark.createdAt.getTime() / 1000)}"`
+        : "";
+
+      const tagNames = bookmark.tags.map((t) => t.name).join(",");
+      const tags = tagNames.length > 0 ? `TAGS="${tagNames}"` : "";
+
+      const encodedUrl = encodeURI(bookmark.content.url);
+      const displayTitle = bookmark.title ?? bookmark.content.url;
+      const encodedTitle = escapeHtml(displayTitle);
+
+      return `    <DT><A HREF="${encodedUrl}" ${addDate} ${tags}>${encodedTitle}</A>`;
+    })
+    .filter(Boolean)
+    .join("\n");
+
+  return `${header}\n${bookmarkEntries}\n${footer}`;
+}
+
+function escapeHtml(input: string): string {
+  const escapeMap: Record<string, string> = {
+    "&": "&amp;",
+    "'": "&#x27;",
+    "`": "&#x60;",
+    '"': "&quot;",
+    "<": "&lt;",
+    ">": "&gt;",
+  };
+
+  return input.replace(/[&'`"<>]/g, (match) => escapeMap[match] || "");
+}