@switchbot/homebridge-switchbot
Version:
The SwitchBot plugin allows you to access your SwitchBot device(s) from HomeKit.
555 lines • 26.2 kB
JavaScript
import { createDevice } from './deviceFactory.js';
import { PLATFORM_NAME, PLUGIN_NAME } from './settings.js';
import { SwitchBotClient } from './switchbotClient.js';
import { normalizeTypeForMatter } from './utils.js';
/**
* Homebridge platform class for SwitchBot HAP (HomeKit Accessory Protocol) integration.
* Handles device discovery, registration, polling, and accessory lifecycle for HAP-enabled SwitchBot devices.
*
* @class SwitchBotHAPPlatform
* @param {Logger} log - Homebridge logger instance
* @param {PlatformConfig} config - Platform configuration object
* @param {API} [api] - Optional Homebridge API instance
* @property {API | undefined} api - Homebridge API instance
* @property {Logger} log - Homebridge logger instance
* @property {SwitchBotPluginConfig} config - Parsed plugin config
* @property {any[]} devices - All created device instances
* @property {Map<string, any>} accessories - Map of accessory UUID to accessory object
* @property {string} lastConfigHash - Hash of last loaded config for change detection
* @property {NodeJS.Timeout | null} configReloadInterval - Interval for periodic config reload
* @property {Map<string, NodeJS.Timeout>} openApiPollTimers - Timers for per-device OpenAPI polling
* @property {NodeJS.Timeout | null} openApiBatchTimer - Timer for batched OpenAPI polling
* @property {number} openApiRequestsToday - Count of OpenAPI requests made today
* @property {number} openApiLastReset - Timestamp (ms) of last OpenAPI daily counter reset
*/
export class SwitchBotHAPPlatform {
/** Homebridge API instance */
api;
/** Homebridge logger instance */
log;
/** Parsed plugin config */
config;
/** All created device instances */
devices = [];
/** Map of accessory UUID to accessory object */
accessories;
/** Hash of last loaded config for change detection */
lastConfigHash = '';
/** Interval for periodic config reload */
configReloadInterval = null;
/** Timers for per-device OpenAPI polling */
openApiPollTimers = new Map();
/** Timer for batched OpenAPI polling */
openApiBatchTimer = null;
/** Count of OpenAPI requests made today */
openApiRequestsToday = 0;
/** Timestamp (ms) of last OpenAPI daily counter reset */
openApiLastReset = 0;
/**
* Construct the SwitchBot HAP platform.
* @param log Homebridge logger
* @param config Platform config
* @param api Homebridge API instance
*/
constructor(log, config, api) {
this.log = log;
// Ensure both log and logger are set for downstream device constructors
this.config = { ...config, log, logger: log };
this.api = api;
this.accessories = new Map();
this.log.info('SwitchBot HAP platform initialized');
// Create/shared SwitchBot client and attach to config so child devices reuse it.
try {
const client = new SwitchBotClient(this.config);
void client.init();
this.config._client = client;
}
catch (e) {
this.log.debug('Failed to create shared SwitchBot client', e);
}
// Wait for Homebridge to finish launching to create/register accessories
if (this.api && typeof this.api.on === 'function') {
this.api.on('didFinishLaunching', async () => {
await this.loadDevices();
this._setupOpenApiPolling();
// Start periodic config reload to pick up UI changes
this.configReloadInterval = setInterval(() => {
void this.checkAndReloadDevices();
}, 10000); // Check every 10 seconds
// Listen for Homebridge shutdown to clear interval
if (typeof this.api.on === 'function') {
this.api.on('shutdown', () => {
this.shutdown();
});
}
});
}
else {
void this.loadDevices();
this._setupOpenApiPolling();
// Start periodic config reload to pick up UI changes
this.configReloadInterval = setInterval(() => {
void this.checkAndReloadDevices();
}, 10000); // Check every 10 seconds
}
}
/**
* Discover and create all device instances from config.
* Populates this.devices and registers HAP accessories for each device.
* Ensures Matter API is loaded before loading devices if available.
*
* @returns {Promise<void>} Resolves when all devices are loaded and registered
*/
async loadDevices() {
// Matter API readiness logic (hybrid only)
const maxAttempts = 20;
let attempt = 0;
let matterLoaded = false;
if (this.api && typeof this.api.isMatterAvailable === 'function' && typeof this.api.isMatterEnabled === 'function' && typeof this.api.loadMatterAPI === 'function') {
if (this.api.isMatterAvailable() && this.api.isMatterEnabled()) {
try {
await this.api.loadMatterAPI();
this.log.info('Homebridge Matter API loaded successfully');
}
catch (e) {
this.log.warn('Failed to load Homebridge Matter API', e);
}
while (attempt < maxAttempts) {
if (this.api.matter) {
matterLoaded = true;
break;
}
await new Promise(res => setTimeout(res, 500));
attempt++;
}
if (!matterLoaded) {
this.log.warn('Matter API did not become available after loadMatterAPI()');
}
}
}
const newHash = this.getConfigHash();
if (newHash === this.lastConfigHash) {
this.log.debug('Config unchanged, skipping device reload');
return;
}
const devices = this.config?.devices ?? [];
const createdDevices = [];
for (const raw of devices) {
// Normalize config keys from UI schema to internal shape (for cross-platform consistency)
const d = {
id: raw.deviceId ?? raw.id,
name: raw.configDeviceName ?? raw.name,
type: raw.configDeviceType ?? raw.type ?? raw.deviceType ?? 'unknown',
encryptionKey: raw.encryptionKey,
keyId: raw.keyId,
_raw: raw,
};
const type = normalizeTypeForMatter(d.type);
const deviceOpts = { id: d.id, type, name: d.name, encryptionKey: d.encryptionKey, keyId: d.keyId, log: this.log };
this.log.debug(`[HAP/Debug] Device options for ${d.name ?? d.id}:`, JSON.stringify(deviceOpts, null, 2));
try {
const created = await createDevice(deviceOpts, this.config, false);
this.devices.push(created);
createdDevices.push({ created, d, type });
}
catch (e) {
this.log.error(`Failed to create HAP device ${d.id}:`, e instanceof Error ? e.stack || e.message : e);
}
}
// Register HAP accessories after all devices are created for symmetry with Matter platform
await this.registerHAPAccessories(createdDevices);
this.lastConfigHash = newHash;
}
/**
* Registers all HAP accessories with the Homebridge HAP API.
*
* This method is called after all device instances have been created. It handles both new and restored
* accessories, updating their context and adding or updating HAP services and characteristics as needed.
* Accessories are registered with Homebridge using the HAP API, and the internal accessory map is updated accordingly.
*
* @param {Array<{created: any, d: any, type: string}>} createdDevices - Array of device descriptors:
* - created: The created device instance
* - d: The normalized device config object
* - type: The normalized device type string
* @returns {Promise<void>} Resolves when registration is complete
*
* Differences from Matter registration:
* - Uses the HAP API (not Matter API) for accessory registration.
* - Adds HAP services and characteristics to each accessory based on the device descriptor.
* - Does not require or check for Matter support or availability.
* - Accessory context and service wiring are HAP-specific.
*
* If the Homebridge HAP API is not available, registration is skipped and a log message is emitted.
*/
async registerHAPAccessories(createdDevices) {
if (!this.api || !this.api.hap || typeof this.api.registerPlatformAccessories !== 'function') {
this.log.info('HAP API not available to register accessories');
return;
}
const hap = this.api.hap;
const accessoriesToRegister = [];
for (const { created, d, type } of createdDevices) {
try {
const uuid = hap.uuid.generate(`${d.id}`);
let accessory = this.accessories.get(uuid);
if (!accessory) {
for (const [, a] of this.accessories.entries()) {
try {
if (a && a.context && a.context.deviceId === d.id) {
accessory = a;
break;
}
}
catch (e) {
// ignore
}
}
}
if (!accessory) {
accessory = new this.api.platformAccessory(d.name || type, uuid);
try {
accessory.context = accessory.context || {};
accessory.context.deviceId = d.id;
accessory.context.type = type;
}
catch (e) {
// ignore context failures
}
accessoriesToRegister.push(accessory);
this.accessories.set(uuid, accessory);
}
else {
try {
accessory.context = accessory.context || {};
accessory.context.deviceId = accessory.context.deviceId || d.id;
accessory.context.type = accessory.context.type || type;
accessory.deviceType = type;
const accDesc = await created.createAccessory?.(this.api);
accessory.displayName = (accDesc && accDesc.name) || d.name || type;
accessory.manufacturer = (accDesc && accDesc.manufacturer) || accessory.manufacturer || 'SwitchBot';
accessory.model = (accDesc && accDesc.model) || accessory.model || type;
accessory.serialNumber = (accDesc && accDesc.serialNumber) || accessory.serialNumber || d.id;
accessory.firmwareRevision = (accDesc && accDesc.firmwareRevision) || accessory.firmwareRevision || '1.0.0';
accessory.hardwareRevision = (accDesc && accDesc.hardwareRevision) || accessory.hardwareRevision || '';
accessory.UUID = accessory.UUID || accessory.uuid || uuid;
}
catch (e) {
// ignore
}
}
// Add basic service descriptor from device (symmetrical to Matter: remove stale services/chars)
const accDesc = await created.createAccessory?.(this.api);
if (accDesc && accDesc.services) {
const serviceTypes = accDesc.services.map((s) => s.type);
for (const existingService of accessory.services.slice()) {
if (existingService.constructor && existingService.constructor.name && !serviceTypes.includes(existingService.constructor.name)) {
accessory.removeService(existingService);
}
}
for (const s of accDesc.services) {
const Service = hap.Service[s.type] || hap.Service[s.type];
if (!Service) {
continue;
}
const service = accessory.getService(Service) || accessory.addService(Service);
const charNames = Object.keys(s.characteristics || {});
for (const existingChar of service.characteristics.slice()) {
if (!charNames.includes(existingChar.displayName)) {
service.removeCharacteristic(existingChar);
}
}
for (const [charName, getterSetterRaw] of Object.entries(s.characteristics || {})) {
const getterSetter = getterSetterRaw;
const Characteristic = hap.Characteristic[charName];
if (!Characteristic) {
continue;
}
if (getterSetter && getterSetter.props) {
try {
service.getCharacteristic(Characteristic).setProps(getterSetter.props);
}
catch (e) {
// ignore setProps failures on older HAP implementations
}
}
if (getterSetter && typeof getterSetter.get === 'function') {
service.getCharacteristic(Characteristic).onGet(getterSetter.get);
}
if (getterSetter && typeof getterSetter.set === 'function') {
service.getCharacteristic(Characteristic).onSet(getterSetter.set);
}
}
}
}
this.log.info(`Created/updated HAP accessory ${d.id} (${type})`);
}
catch (e) {
this.log.warn('HAP accessory creation failed', e);
}
}
if (accessoriesToRegister.length > 0) {
try {
this.api.registerPlatformAccessories(PLUGIN_NAME, PLATFORM_NAME, accessoriesToRegister);
this.log.info(`Registered ${accessoriesToRegister.length} HAP accessory(ies) with Homebridge`);
}
catch (e) {
this.log.warn('Failed to register HAP accessories', e);
}
}
else {
this.log.info('No HAP accessories to register');
}
}
/**
* Returns the timestamp (ms) of the last OpenAPI daily counter reset.
* @returns {number} Timestamp in ms
*/
getOpenApiLastReset() {
return this.openApiLastReset;
}
/**
* Logs the last OpenAPI reset time in a human-readable format.
* @returns {void}
*/
logOpenApiLastReset() {
if (this.openApiLastReset) {
const date = new Date(this.openApiLastReset);
this.log.info(`[OpenAPI] Last daily counter reset: ${date.toLocaleString()}`);
}
else {
this.log.info('[OpenAPI] Daily counter has not been reset yet.');
}
}
/**
* Compute a hash of the current device config for change detection.
* @returns {string} JSON string hash of device config
*/
getConfigHash() {
// Create a simple hash of current device config to detect changes
const devices = this.config?.devices ?? [];
return JSON.stringify(devices.map((d) => ({
id: d.deviceId ?? d.id,
type: d.configDeviceType ?? d.type,
name: d.configDeviceName ?? d.name,
})));
}
/**
* Reload devices if config has changed since last load.
* Unregisters accessories and removes devices no longer in config.
* Calls loadDevices to repopulate devices and accessories.
*
* @returns {Promise<void>} Resolves when reload is complete
*/
async checkAndReloadDevices() {
const currentHash = this.getConfigHash();
if (currentHash !== this.lastConfigHash) {
this.log.info('[SwitchBot] Detected config changes, reloading devices...');
// Identify device IDs in new config
const devicesInConfig = new Set((this.config?.devices ?? []).map((d) => d.deviceId ?? d.id));
// Find accessories to remove (not in config)
const accessoriesToRemove = [];
for (const [uuid, accessory] of this.accessories.entries()) {
const deviceId = accessory?.context?.deviceId;
if (deviceId && !devicesInConfig.has(deviceId)) {
accessoriesToRemove.push({ accessory, uuid });
}
}
// Unregister removed accessories from Homebridge
if (accessoriesToRemove.length > 0 && this.api && this.api.unregisterPlatformAccessories) {
try {
this.api.unregisterPlatformAccessories(PLUGIN_NAME, PLATFORM_NAME, accessoriesToRemove.map(a => a.accessory));
this.log.info(`Unregistered ${accessoriesToRemove.length} accessory(ies) removed from config`);
for (const { uuid } of accessoriesToRemove) {
this.accessories.delete(uuid);
}
}
catch (e) {
this.log.warn('Failed to unregister removed accessories', e);
}
}
// Remove devices from this.devices that are no longer in config
this.devices = this.devices.filter((dev) => devicesInConfig.has(dev?.id));
await this.loadDevices();
this.lastConfigHash = currentHash;
}
}
/**
* Cleanup method to clear config reload interval on shutdown.
* Called by Homebridge on shutdown event.
* @returns {void}
*/
shutdown() {
if (this.configReloadInterval) {
clearInterval(this.configReloadInterval);
this.configReloadInterval = null;
this.log.info('Cleared config reload interval on shutdown');
}
}
/**
* Setup OpenAPI polling for all devices according to config (global, per-device, batch, rate limit).
* Handles daily request limits, per-device and batch polling, and resets.
*
* @returns {void}
*/
_setupOpenApiPolling() {
// Clear any existing timers
for (const t of this.openApiPollTimers.values())
clearInterval(t);
this.openApiPollTimers.clear();
if (this.openApiBatchTimer) {
clearInterval(this.openApiBatchTimer);
}
this.openApiBatchTimer = null;
const cfg = this.config;
const devices = cfg.devices ?? [];
const globalRate = Math.max(Number(cfg.openApiRefreshRate) || 300, 30);
const batchEnabled = cfg.matterBatchEnabled !== false;
const batchRate = Math.max(Number(cfg.matterBatchRefreshRate) || globalRate, 30);
const batchConcurrency = Math.max(Number(cfg.matterBatchConcurrency) || 5, 1);
const batchJitter = Math.max(Number(cfg.matterBatchJitter) || 0, 0);
const dailyLimit = Math.max(Number(cfg.dailyApiLimit) || 10000, 1000);
const dailyReserve = Math.max(Number(cfg.dailyApiReserveForCommands) || 1000, 0);
const resetAtLocalMidnight = !!cfg.dailyApiResetLocalMidnight;
const webhookOnlyOnReserve = !!cfg.webhookOnlyOnReserve;
// Helper to reset daily counter
const resetCounter = () => {
this.openApiRequestsToday = 0;
this.openApiLastReset = Date.now();
this.log.info('[OpenAPI] Daily request counter reset');
};
// Schedule reset at midnight
const scheduleMidnightReset = () => {
const now = new Date();
let nextReset;
if (resetAtLocalMidnight) {
nextReset = new Date(now.getFullYear(), now.getMonth(), now.getDate() + 1, 0, 0, 1);
}
else {
nextReset = new Date(now);
nextReset.setUTCHours(24, 0, 1, 0);
}
const ms = nextReset.getTime() - now.getTime();
setTimeout(() => {
resetCounter();
scheduleMidnightReset();
}, ms);
};
scheduleMidnightReset();
// Helper to check if polling is allowed
const canPoll = () => {
if (this.openApiRequestsToday + dailyReserve >= dailyLimit) {
if (!webhookOnlyOnReserve) {
this.log.warn('[OpenAPI] Daily request limit reached, pausing background polling');
}
return false;
}
return true;
};
// Per-device polling (devices with per-device refreshRate)
for (const dev of devices) {
const id = dev.deviceId ?? dev.id;
const enabled = dev.enabled !== false;
if (!id || !enabled) {
continue;
}
const perDeviceRate = dev.refreshRate ? Math.max(Number(dev.refreshRate), 30) : null;
if (perDeviceRate) {
// Individual polling interval for this device
const timer = setInterval(async () => {
if (!canPoll()) {
return;
}
try {
const client = this.config._client;
if (client && typeof client.getDevice === 'function') {
await client.getDevice(id);
this.openApiRequestsToday++;
this.log.debug(`[OpenAPI] Polled device ${id} (per-device interval ${perDeviceRate}s) [${this.openApiRequestsToday}/${dailyLimit}]`);
}
}
catch (e) {
this.log.debug(`[OpenAPI] Polling failed for device ${id}:`, e?.message);
}
}, perDeviceRate * 1000);
this.openApiPollTimers.set(id, timer);
}
}
// Batched polling for all other devices
if (batchEnabled) {
// Devices not already polled individually
const batchDevices = devices.filter((dev) => {
const id = dev.deviceId ?? dev.id;
const enabled = dev.enabled !== false;
const perDeviceRate = dev.refreshRate ? Math.max(Number(dev.refreshRate), 30) : null;
return id && enabled && !perDeviceRate;
});
// Optional jitter before first batch
const startBatch = () => {
this.openApiBatchTimer = setInterval(async () => {
if (!canPoll()) {
return;
}
const client = this.config._client;
if (!client || typeof client.getDevice !== 'function') {
return;
}
// Limit concurrency
const chunks = [];
for (let i = 0; i < batchDevices.length; i += batchConcurrency) {
chunks.push(batchDevices.slice(i, i + batchConcurrency));
}
for (const chunk of chunks) {
await Promise.all(chunk.map(async (dev) => {
try {
await client.getDevice(dev.deviceId ?? dev.id);
this.openApiRequestsToday++;
this.log.debug(`[OpenAPI] Batched poll device ${dev.deviceId ?? dev.id} [${this.openApiRequestsToday}/${dailyLimit}]`);
}
catch (e) {
this.log.debug(`[OpenAPI] Batched polling failed for device ${dev.deviceId ?? dev.id}:`, e?.message);
}
}));
}
}, batchRate * 1000);
};
if (batchJitter > 0) {
setTimeout(startBatch, Math.floor(Math.random() * batchJitter * 1000));
}
else {
startBatch();
}
}
}
/**
* Called by Homebridge to restore cached HAP accessories on startup.
* @param {any} accessory - The cached accessory object
* @returns {Promise<void>} Resolves when accessory is restored
*/
async configureAccessory(accessory) {
try {
const uuid = accessory.UUID || accessory.UUID;
this.accessories.set(uuid, accessory);
this.log.info(`Restored cached accessory ${accessory.displayName || uuid}`);
}
catch (e) {
this.log.warn('configureAccessory failed to restore accessory', e);
}
}
/**
* Called by Homebridge when a cached Matter accessory is restored (optional signature).
* @param {any} accessory - The cached accessory object
* @returns {void}
*/
configureMatterAccessory(accessory) {
try {
const uuid = accessory.uuid || accessory.UUID || accessory.uuid;
this.accessories.set(uuid, accessory);
this.log.info(`Restored cached Matter accessory ${accessory.displayName || uuid}`);
}
catch (e) {
this.log.warn('configureMatterAccessory failed to restore accessory', e);
}
}
}
export default SwitchBotHAPPlatform;
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