feat: add public (unauthenticated) live captions stream

routes/liveCaptions.js

@@ -210,4 +210,38 @@ router.post("/reset", async (_, res) => {
     }
 });
 
+router.get("/public/stream", async (req, res) => {
+    try {
+        maybeResetForInactivity();
+        const sinceSequence = Number.parseInt(req.query?.sinceSequence, 10);
+        const requestedLimit = Number.parseInt(req.query?.limit, 10);
+        const initialLimit = Number.isFinite(requestedLimit)
+            ? Math.max(1, Math.min(requestedLimit, MAX_INITIAL_LIMIT))
+            : DEFAULT_INITIAL_LIMIT;
+
+        let captions = [];
+        if (Number.isFinite(sinceSequence) && sinceSequence >= 0) {
+            captions = liveCaptionState.captions.filter((item) => item.sequence > sinceSequence);
+        } else {
+            captions = liveCaptionState.captions.slice(-initialLimit);
+        }
+
+        return res.json({
+            status: "ok",
+            latestSequence: liveCaptionState.latestSequence,
+            startedAt: new Date(liveCaptionState.startedAt).toISOString(),
+            availableLanguages: getAvailableLanguages(),
+            captions,
+        });
+    } catch (error) {
+        console.error("Error getting public live captions stream", error);
+        return res.status(500).json({
+            status: "Internal server error",
+            latestSequence: liveCaptionState.latestSequence,
+            captions: [],
+            availableLanguages: [],
+        });
+    }
+});
+
 module.exports = router;