1 files changed, 29 insertions, 0 deletions
diff --git a/sdnr/wt/odlux/lib/broadcast/mapChannel.ts b/sdnr/wt/odlux/lib/broadcast/mapChannel.ts
new file mode 100644
index 000000000..efd76eb8c
--- /dev/null
+++ b/sdnr/wt/odlux/lib/broadcast/mapChannel.ts
@@ -0,0 +1,29 @@
+
+const channel: BroadcastChannel = new BroadcastChannel("odlux_map");
+const listeners: { [key: string]: ((data: any) => void)[] } = {};
+
+channel.onmessage = (eventMessage: MessageEvent<any>) => {
+  const { key, data } = eventMessage.data;
+  if (listeners[key]) {
+    listeners[key].forEach(listener => listener(data));
+  }
+};
+
+export const sendMapMessage = (data: any, key: string) => {
+  channel.postMessage({ key, data });
+};
+
+export const addMapMessageListener = (key: string, listener: (data: any) => void) => {
+  if (!listeners[key]) {
+    listeners[key] = [];
+  }
+  
+  if (!listeners[key].find(l => l === listener)) {
+    listeners[key].push(listener);
+  }
+
+  return () => {
+    listeners[key] = listeners[key].filter(l => l !== listener);
+  }
+};
+