camstreamerlib/esm/CamSwitcherEvents.js

Helper library for CamStreamer ACAP applications.

import { cswEventsSchema, } from './types/CamSwitcherEvents';
export class CamSwitcherEvents {
    isDestroyed = false;
    ws = null;
    listeners = {};
    setWebsocket(ws) {
        if (this.ws) {
            this.ws.destroy();
        }
        this.ws = ws;
        this.ws.onmessage = (e) => this.onMessage(e);
    }
    resendInitData() {
        const request = {
            command: 'sendInitData',
        };
        this.ws?.send(JSON.stringify(request));
    }
    addListener(type, listener, id) {
        const typeList = this.listeners[type];
        if (typeList === undefined) {
            this.listeners[type] = { [id]: listener };
            return;
        }
        typeList[id] = listener;
    }
    removeListener(type, id) {
        const typeList = this.listeners[type];
        if (typeList) {
            delete typeList[id];
        }
    }
    onMessage(evt) {
        if (this.isDestroyed) {
            return;
        }
        try {
            const eventData = JSON.parse(evt.data);
            const data = cswEventsSchema.parse(eventData);
            if (data.type === 'init') {
                this.processMessage(data.data, true);
                return;
            }
            this.processMessage(data, false);
        }
        catch (error) {
            console.error('Error parsing event data:', evt.data, error);
        }
    }
    processMessage(event, isInit) {
        const listeners = this.listeners[event.type];
        const list = Object.values(listeners ?? {});
        list.forEach((listener) => listener(event, isInit));
    }
    destroy() {
        this.isDestroyed = true;
        if (this.ws) {
            this.ws.destroy();
            this.ws = null;
        }
        this.listeners = {};
    }
}