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platform.ts
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platform.ts
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import fetch from 'node-fetch';
import { API, DynamicPlatformPlugin, Logger, PlatformAccessory, PlatformConfig, Service, Characteristic } from 'homebridge';
import { PLATFORM_NAME, PLUGIN_NAME } from './settings';
import { RadiantCoolingZoneAccessory } from './platformAccessory';
import { URLSearchParams } from 'url';
/**
* HomebridgePlatform
* This class is the main constructor for your plugin, this is where you should
* parse the user config and discover/register accessories with Homebridge.
*/
export class RadiantCoolingPlatformPlugin implements DynamicPlatformPlugin {
public readonly Service: typeof Service = this.api.hap.Service;
public readonly Characteristic: typeof Characteristic = this.api.hap.Characteristic;
// this is used to track restored cached accessories
public readonly accessories: PlatformAccessory[] = [];
private messanaRequestHeaders;
constructor(
public readonly log: Logger,
public readonly config: PlatformConfig,
public readonly api: API,
) {
if (this.config.bearer === undefined) {
this.log.error('Plugin could not be initialized. Enter Bearer for Messana api in plugin configuration');
return;
}
this.messanaRequestHeaders = {
'authorization': 'Bearer ' + this.config.bearer,
};
// When this event is fired it means Homebridge has restored all cached accessories from disk.
// Dynamic Platform plugins should only register new accessories after this event was fired,
// in order to ensure they weren't added to homebridge already. This event can also be used
// to start discovery of new accessories.
this.api.on('didFinishLaunching', () => {
log.debug('Executed didFinishLaunching callback');
// run the method to discover / register your devices as accessories
this.discoverDevices();
});
}
messanaApiFetch(urlPath: string) {
return fetch('http://'+ this.config.messanaHostNameOrIP + '/api/' + urlPath, {
'headers': this.messanaRequestHeaders,
},
).then(resp => resp.json());
}
messanaApiPut(urlPath: string, params) {
fetch('http://'+ this.config.messanaHostNameOrIP + '/api/' + urlPath, {
method: 'PUT',
'headers': this.messanaRequestHeaders,
body: new URLSearchParams(params),
});
}
/**
* This function is invoked when homebridge restores cached accessories from disk at startup.
* It should be used to setup event handlers for characteristics and update respective values.
*/
configureAccessory(accessory: PlatformAccessory) {
this.log.info('Loading accessory from cache:', accessory.displayName);
// add the restored accessory to the accessories cache so we can track if it has already been registered
this.accessories.push(accessory);
}
/**
* This is an example method showing how to register discovered accessories.
* Accessories must only be registered once, previously created accessories
* must not be registered again to prevent "duplicate UUID" errors.
*/
discoverDevices() {
this.messanaApiFetch('system/zoneCount')
.then(json => {
const numZones = json['count'];
this.log.info('Found %s zones', numZones);
for (let i = 0; i < numZones; i++) {
// generate a unique id for the accessory this should be generated from
// something globally unique, but constant, for example, the device serial
// number or MAC address
const uuid = this.api.hap.uuid.generate('radiantcooling-' + i);
this.log.debug('uuid: ', uuid);
// see if an accessory with the same uuid has already been registered and restored from
// the cached devices we stored in the `configureAccessory` method above
const existingAccessory = this.accessories.find(accessory => accessory.UUID === uuid);
if (existingAccessory) {
// the accessory already exists
this.log.info('Restoring existing accessory from cache:', existingAccessory.displayName);
// create the accessory handler for the restored accessory
// this is imported from `platformAccessory.ts`
// new RadiantCoolingZoneAccessory(this, existingAccessory);
// it is possible to remove platform accessories at any time using `api.unregisterPlatformAccessories`, eg.:
// remove platform accessories when no longer present
this.api.unregisterPlatformAccessories(PLUGIN_NAME, PLATFORM_NAME, [existingAccessory]);
this.log.info('Removing existing accessory from cache:', existingAccessory.displayName);
}
// the accessory does not yet exist, so we need to create it
this.messanaApiFetch('zone/name/' + i)
.then(json => {
const name = json['name'];
this.log.info('Adding new accessory:', name);
// create a new accessory
const accessory = new this.api.platformAccessory(name, uuid);
// create the accessory handler for the newly create accessory
// this is imported from `platformAccessory.ts`
new RadiantCoolingZoneAccessory(this, accessory, i);
// link the accessory to your platform
this.api.registerPlatformAccessories(PLUGIN_NAME, PLATFORM_NAME, [accessory]);
});
}
});
}
}