feat: harden isolated Tornado test workflow

Web/playout-safety.js

@@ -0,0 +1,57 @@
+(function (root, factory) {
+  "use strict";
+
+  const api = Object.freeze(factory());
+  if (typeof module === "object" && module.exports) module.exports = api;
+  if (root) root.MbnPlayoutSafety = api;
+})(typeof globalThis === "object" ? globalThis : this, function () {
+  "use strict";
+
+  const connectionStates = new Set([
+    "disabled", "dry-run-ready", "disconnected", "connecting", "connected",
+    "reconnecting", "disconnecting", "faulted", "outcome-unknown", "disposed"
+  ]);
+
+  function normalizeConnectionState(value) {
+    const normalized = String(value || "unavailable")
+      .trim()
+      .toLocaleLowerCase("en-US")
+      .replace(/[\s_]+/g, "-");
+    return connectionStates.has(normalized) ? normalized : "unavailable";
+  }
+
+  function responseTimeoutFromNative(value) {
+    const operationTimeout = Number(value);
+    if (!Number.isFinite(operationTimeout) || operationTimeout < 100 || operationTimeout > 300000) {
+      return 15000;
+    }
+    return Math.min(305000, Math.max(5100, Math.trunc(operationTimeout) + 5000));
+  }
+
+  function commandBlockReason(snapshot, command) {
+    if (!snapshot || snapshot.pending) return "busy";
+    if (snapshot.outcomeUnknown) return "outcome-unknown";
+    if (!snapshot.commandAvailable) return "unavailable";
+
+    const onAir = snapshot.engineState === "PROGRAM" || Boolean(snapshot.onAirCode);
+    const prepared = snapshot.engineState === "PREPARED" || Boolean(snapshot.preparedCode);
+    if (command === "next" && !onAir) return "next-requires-on-air";
+    if (command === "take-in" && !prepared) return "take-in-requires-prepare";
+    if (command === "take-out" && !onAir && !prepared) return "nothing-to-take-out";
+    return null;
+  }
+
+  function matchesPendingCommand(pending, payload) {
+    return Boolean(
+      pending && payload &&
+      payload.requestId === pending.requestId &&
+      payload.command === pending.command);
+  }
+
+  return {
+    normalizeConnectionState,
+    responseTimeoutFromNative,
+    commandBlockReason,
+    matchesPendingCommand
+  };
+});