Fix PCI Stripe e anteprima regia; checkout sempre hosted.

Blocca l'invio di numeri carta dall'API server, usa Checkout anche per i cambi piano e nasconde correttamente il placeholder video in regia.

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/public/regia.js

@@ -35,6 +35,7 @@
 
   let pendingAction = null;
   let hls = null;
+  let previewStarted = false;
 
   function toast(msg) {
     els.toast.textContent = msg;
@@ -156,6 +157,22 @@
     });
   });
 
+  function syncPreviewFromStatus(data) {
+    if (data.stream_closed) {
+      cfg.streamClosed = true;
+      stopPreview();
+      return;
+    }
+
+    if (data.on_air) {
+      if (!previewStarted) startPreview();
+      else if (els.preview && els.preview.readyState >= 2) hidePreviewPlaceholder();
+    } else {
+      destroyPreview();
+      showPreviewPlaceholder("Anteprima in attesa del segnale…");
+    }
+  }
+
   async function pollStatus() {
     try {
       const res = await fetch(cfg.statusUrl, { headers: { Accept: "application/json" } });
@@ -163,38 +180,52 @@
       const data = await res.json();
       applyScorePayload(data);
       setBadge(data);
-      if (data.stream_closed) {
-        cfg.streamClosed = true;
-        stopPreview();
-      }
+      syncPreviewFromStatus(data);
     } catch (_) {}
   }
 
-  function initPreview() {
-    if (cfg.streamClosed || !els.preview || !cfg.hlsUrl) return;
-
-    if (els.preview.canPlayType("application/vnd.apple.mpegurl")) {
-      els.preview.src = cfg.hlsUrl;
-    } else if (window.Hls && Hls.isSupported()) {
-      hls = new Hls({ maxBufferLength: 8 });
-      hls.loadSource(cfg.hlsUrl);
-      hls.attachMedia(els.preview);
-    }
-    els.preview.addEventListener("playing", () => {
-      if (els.previewPlaceholder) els.previewPlaceholder.hidden = true;
+  function bindPreviewEvents() {
+    if (!els.preview) return;
+    ["playing", "loadeddata", "canplay"].forEach((ev) => {
+      els.preview.addEventListener(ev, hidePreviewPlaceholder);
     });
   }
 
+  function startPreview() {
+    if (cfg.streamClosed || !els.preview || !cfg.hlsUrl || previewStarted) return;
+
+    previewStarted = true;
+    const url = hlsUrlFresh();
+
+    if (window.Hls && Hls.isSupported()) {
+      hls = new Hls({ lowLatencyMode: true, maxBufferLength: 8 });
+      hls.loadSource(url);
+      hls.attachMedia(els.preview);
+      hls.on(Hls.Events.MANIFEST_PARSED, () => {
+        els.preview.play().catch(() => {});
+      });
+      hls.on(Hls.Events.ERROR, (_, err) => {
+        if (err.fatal) {
+          destroyPreview();
+          setTimeout(() => {
+            if (!cfg.streamClosed) startPreview();
+          }, 2500);
+        }
+      });
+    } else if (els.preview.canPlayType("application/vnd.apple.mpegurl")) {
+      els.preview.src = url;
+      els.preview.addEventListener(
+        "loadedmetadata",
+        () => els.preview.play().catch(() => {}),
+        { once: true }
+      );
+    }
+  }
+
   function stopPreview() {
-    if (hls) {
-      hls.destroy();
-      hls = null;
-    }
-    if (els.preview) els.preview.remove();
-    if (els.previewPlaceholder) {
-      els.previewPlaceholder.hidden = false;
-      els.previewPlaceholder.textContent = "Diretta terminata";
-    }
+    destroyPreview();
+    if (els.preview) els.preview.style.display = "none";
+    showPreviewPlaceholder("Diretta terminata");
   }
 
   async function pauseStream() {
@@ -246,7 +277,11 @@
   document.getElementById("btn-share")?.addEventListener("click", () => shareLink());
   document.getElementById("btn-copy")?.addEventListener("click", () => copyLink());
 
-  initPreview();
+  bindPreviewEvents();
+  if (!cfg.streamClosed && cfg.hlsUrl) {
+    pollStatus();
+  } else if (cfg.streamClosed) {
+    stopPreview();
+  }
   setInterval(pollStatus, 4000);
-  pollStatus();
 })();