matterbridge-dyson-robot/dist/dyson-mqtt-cache.js

A Matterbridge plugin that connects Dyson robot vacuums and air treatment devices to the Matter smart home ecosystem via their local or cloud MQTT APIs.

// Matterbridge plugin for Dyson robot vacuum and air treatment devices
// Copyright © 2025-2026 Alexander Thoukydides
import EventEmitter from 'events';
// Cache version
const MQTT_CACHE_VERSION = 1;
// Cache Dyson MQTT status to allow start-up when device is offline
export class DysonMqttCache extends EventEmitter {
    log;
    persist;
    serialNumber;
    // Create a new MQTT cache
    constructor(log, persist, serialNumber) {
        super({ captureRejections: true });
        this.log = log;
        this.persist = persist;
        this.serialNumber = serialNumber;
        // Attempt to restore any previously cached status
        void this.restore();
    }
    // Construct a persistent storage key for the cache
    get key() {
        return `mqtt-cache-v${MQTT_CACHE_VERSION}:${this.serialNumber}`;
    }
    // Retrieve the cached status, if any
    async restore() {
        const status = await this.persist.getItem(this.key);
        if (!status)
            return;
        this.emit('restored', status);
    }
    // Store the current status in the cache
    async store(status) {
        await this.persist.setItem(this.key, status);
    }
}
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