pre-installations and preparations

node_modules/@mui/base/node/utils/useMessageBus.js

@@ -0,0 +1,50 @@
+"use strict";
+'use client';
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.createMessageBus = createMessageBus;
+exports.useMessageBus = useMessageBus;
+var React = _interopRequireWildcard(require("react"));
+function _getRequireWildcardCache(e) { if ("function" != typeof WeakMap) return null; var r = new WeakMap(), t = new WeakMap(); return (_getRequireWildcardCache = function (e) { return e ? t : r; })(e); }
+function _interopRequireWildcard(e, r) { if (!r && e && e.__esModule) return e; if (null === e || "object" != typeof e && "function" != typeof e) return { default: e }; var t = _getRequireWildcardCache(r); if (t && t.has(e)) return t.get(e); var n = { __proto__: null }, a = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var u in e) if ("default" !== u && Object.prototype.hasOwnProperty.call(e, u)) { var i = a ? Object.getOwnPropertyDescriptor(e, u) : null; i && (i.get || i.set) ? Object.defineProperty(n, u, i) : n[u] = e[u]; } return n.default = e, t && t.set(e, n), n; }
+function createMessageBus() {
+  const listeners = new Map();
+  function subscribe(topic, callback) {
+    let topicListeners = listeners.get(topic);
+    if (!topicListeners) {
+      topicListeners = new Set([callback]);
+      listeners.set(topic, topicListeners);
+    } else {
+      topicListeners.add(callback);
+    }
+    return () => {
+      topicListeners.delete(callback);
+      if (topicListeners.size === 0) {
+        listeners.delete(topic);
+      }
+    };
+  }
+  function publish(topic, ...args) {
+    const topicListeners = listeners.get(topic);
+    if (topicListeners) {
+      topicListeners.forEach(callback => callback(...args));
+    }
+  }
+  return {
+    subscribe,
+    publish
+  };
+}
+
+/**
+ * @ignore - internal hook.
+ */
+function useMessageBus() {
+  const bus = React.useRef();
+  if (!bus.current) {
+    bus.current = createMessageBus();
+  }
+  return bus.current;
+}