redo timeplot web

1 files changed, 32 insertions, 0 deletions

diff --git a/web-timeplot/src/core/event-bus.js b/web-timeplot/src/core/event-bus.js
new file mode 100644
index 0000000..192eb6d
--- /dev/null
+++ b/web-timeplot/src/core/event-bus.js
@@ -0,0 +1,32 @@
+export class EventBus {
+    constructor() {
+        this.listeners = new Map();
+    }
+
+    on(eventName, listener) {
+        if (!this.listeners.has(eventName)) {
+            this.listeners.set(eventName, new Set());
+        }
+
+        const listeners = this.listeners.get(eventName);
+        listeners.add(listener);
+
+        return () => {
+            listeners.delete(listener);
+            if (listeners.size === 0) {
+                this.listeners.delete(eventName);
+            }
+        };
+    }
+
+    emit(eventName, payload) {
+        const listeners = this.listeners.get(eventName);
+        if (!listeners) {
+            return;
+        }
+
+        for (const listener of listeners) {
+            listener(payload);
+        }
+    }
+}