# All files / lib/awareness bus.ts

77.14% Statements 27/35
63.63% Branches 7/11
100% Functions 4/4
77.14% Lines 27/35

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     // lib/awareness/bus.ts
    import {
      AWARENESS_ENABLED,
      AwarenessEventPayload,
      TELEMETRY_ENABLED,
      AwarenessEvent,
    } from './events';
    import { updateSnapshot, resetSnapshot } from './snapshot';

    type AwarenessListener = (event: AwarenessEventPayload) => void;

    const listeners: Set<AwarenessListener> = new Set();

    // For testing purposes
    function _resetListeners(): void {
        listeners.clear();
    }

    export function resetBus(): void {
        _resetListeners();
        resetSnapshot();
    }

    export function subscribe(listener: AwarenessListener): () => void {
      listeners.add(listener);
      return () => {
        listeners.delete(listener);
      };
    }

    export function publish(event: AwarenessEventPayload): void {
      if (!AWARENESS_ENABLED) {
        return;
      }

      if (event.type === AwarenessEvent.TELEMETRY_METRIC && !TELEMETRY_ENABLED) {
        return;
      }

      // Log to console for debugging, respecting the guards
      if (process.env.NODE_ENV !== 'test') {
        console.log('[Awareness]', event.type, event.payload);
      }

      // Update internal state snapshot
      updateSnapshot(event);

      // Notify subscribers
      listeners.forEach(listener => {
        try {
          listener(event);
        } catch (error) {
          console.error('Error in awareness listener:', error);
        }
      });
    }