homebridge-harmony-control/src/Accessories/ControlUnit.ts

import * as Config from "../Models/Config"
import { IAccessory } from './IAccessory';
import callbackify from '../Util/Callbackify';
import HarmonyDataProvider from '../DataProviders/HarmonyDataProvider';

let Service: HAPNodeJS.Service;
let Characteristic: HAPNodeJS.Characteristic;
let Api: any;
let homebridge: any;

/**
 * Enum describing remote key presses from homebridge.
 */
export enum RemoteKey {
    REWIND = 0,
    FAST_FORWARD = 1,
    NEXT_TRACK = 2,
    PREVIOUS_TRACK = 3,
    ARROW_UP = 4,
    ARROW_DOWN = 5,
    ARROW_LEFT = 6,
    ARROW_RIGHT = 7,
    SELECT = 8,
    BACK = 9,
    EXIT = 10,
    PLAY_PAUSE = 11,
    INFORMATION = 15,
}

export interface IControlUnitProps {
    dataProvider: HarmonyDataProvider,
    displayName: string,
    activities: Array<Config.IActivity>,
    api: any,
    log: any,
    homebridge: any,
}

/**
 * ControlUnit accessory
 */
export class ControlUnit implements IAccessory {
    //Required by homebridge
    name: string = "";

    //fields
    private log: any = {};
    private displayName: string = "";

    //Service fields
    private televisionService: HAPNodeJS.Service | undefined;
    private televisionSpeakerService: HAPNodeJS.Service | undefined;
    private informationService: HAPNodeJS.Service | undefined;
    private inputServices: Array<HAPNodeJS.Service | undefined> = [];

    //Harmony fields
    private activities: Array<Config.IActivity> = [];
    private dataProvider: HarmonyDataProvider;

    public platformAccessory: any;

    /**
     * Constructor
     * @param props Input properties
     */
    constructor(props: IControlUnitProps) {
        //Assign class variables
        this.log = props.log;
        Api = props.api;
        Service = props.api.hap.Service;
        Characteristic = props.api.hap.Characteristic;
        this.name = props.displayName;
        this.displayName = props.displayName;

        this.activities = props.activities;

        this.dataProvider = props.dataProvider;
        homebridge = props.homebridge;

        this.platformAccessory = new homebridge.platformAccessory(this.displayName, this.generateUUID(), homebridge.hap.Accessory.Categories.TELEVISION);

        //Configure services
        this.configureTvService();

        this.configureTvSpeakerService();


        // this.configureAccessoryInformation();
        this.configureInputSourceService();

        //Configure external services
        this.getServices().forEach(service => {
            try {
                this.platformAccessory.addService(service);
            } catch (error) { }

            //@ts-ignore
            if (service.linked) {
                //@ts-ignore
                this.televisionService!.addLinkedService(service);
            }
        });
    }
    /*************
     * 
     * Tv Service
     * 
     *************/

    /**
     * Configure television service
     */
    private configureTvService(): void {
        this.televisionService = new Service.Television(
            this.displayName,
            'tvService'
        )

        this.televisionService.setCharacteristic(Characteristic.ConfiguredName, this.displayName);
        //@ts-ignore
        this.televisionService.setCharacteristic(Characteristic.SleepDiscoveryMode, Characteristic.SleepDiscoveryMode.ALWAYS_DISCOVERABLE);
        this.televisionService.setCharacteristic(Characteristic.ActiveIdentifier, 1);
        this.televisionService.setCharacteristic(Characteristic.Active, false);

        //setup listeners
        this.televisionService.getCharacteristic(Characteristic.Active)
            //@ts-ignore
            .on("set", callbackify(this.onSetAccessoryActive))
            //@ts-ignore
            .on("get", callbackify(this.onGetAccessoryActive));

        //Set remote characteristics if is external
        this.televisionService.getCharacteristic(Characteristic.RemoteKey)
            //@ts-ignore
            .on("set", callbackify(this.onSetRemoteKey));


        this.televisionService.getCharacteristic(Characteristic.ActiveIdentifier)
            //@ts-ignore
            .on("set", callbackify(this.onSetActiveIdentifier))
            //@ts-ignore
            .on("get", callbackify(this.onGetActiveIdentifier));
    }

    /**
     * Event handler for SET active characteristic
     */
    private onSetAccessoryActive = async (value: any) => {
        switch (value) {
            case 0: this.dataProvider.powerOff(this.name); break;
            //Turn on with first activity
            case 1: this.dataProvider.powerOn(this.name, this.activities[0]); break;
        }
    }

    /**
     * Event handler for GET active characteristic
     */
    private onGetAccessoryActive = async () => {
        //@ts-ignore
        return this.dataProvider.getIsActive(this.name) ? Characteristic.Active.Active : Characteristic.Active.Inactive
    }

    /**
     * Event handler for SET remote key
     */
    private onSetRemoteKey = async (key: any) => {
        this.dataProvider.sendKeyPress(this.name, key);
    }

    /**
     * Event handler for SET active identifier characteristic
     */
    private onSetActiveIdentifier = async (identifier: any) => {
        this.dataProvider.startActivity(this.name, this.activities[identifier]);
    }

    /**
     * Event handler for GET active identifier characteristic
     */
    private onGetActiveIdentifier = async () => {
        let currentActivity: Config.IActivity = this.dataProvider.getIsActive(this.name)!;
        let identifier: number = 0;
        if (currentActivity) {
            identifier = this.activities.findIndex(e => e.DisplayName === currentActivity.DisplayName);
        }
        return identifier;
    }

    /******************
     * 
     * Speaker Service
     * 
     *****************/

    /**
     * Configure Speaker Service
     */
    private configureTvSpeakerService(): void {
        this.televisionSpeakerService = new Service.TelevisionSpeaker(
            this.displayName,
            'tvSpeakerService'
        );
        this.televisionSpeakerService.setCharacteristic(Characteristic.Name, this.displayName);
        //@ts-ignore
        this.televisionSpeakerService.setCharacteristic(Characteristic.Active, Characteristic.Active.ACTIVE);
        //@ts-ignore
        this.televisionSpeakerService.setCharacteristic(Characteristic.VolumeControlType, Characteristic.VolumeControlType.ABSOLUTE);
        this.televisionSpeakerService.subtype = this.displayName + "Volume";
        if (this.televisionService) {
            //@ts-ignore
            this.televisionService.addLinkedService(this.televisionSpeakerService);
        }

        //Setup listeners
        this.televisionSpeakerService.getCharacteristic(Characteristic.VolumeSelector)
            //@ts-ignore
            .on("set", callbackify(this.onSetVolumeSelector));
    }

    /**
     * Event handler for SET volume characteristic
     */
    private onSetVolumeSelector = async (value: any) => {
        switch (value) {
            case 0: this.dataProvider.volumeUp(this.name); break;
            case 1: this.dataProvider.volumeDown(this.name); break;
        }
    }

    /*****************
     * 
     * Input services
     * 
     *****************/

    /**
     * Configure input service
     */
    private configureInputSourceService(): void {
        let inputs: Array<HAPNodeJS.Service> = [];
        this.activities.forEach((activity: Config.IActivity, index: number) => {
            let inputService = new Service.InputSource(activity.DisplayName, 'activity' + activity.DisplayName);
            inputService
                .setCharacteristic(Characteristic.Identifier, index)
                .setCharacteristic(
                    Characteristic.ConfiguredName,
                    activity.DisplayName)
                .setCharacteristic(
                    Characteristic.IsConfigured,
                    //@ts-ignore
                    Characteristic.IsConfigured.CONFIGURED
                )
                //@ts-ignore
                .setCharacteristic(Characteristic.InputSourceType, Characteristic.InputSourceType.HDMI);

            //@ts-ignore
            this.televisionService!.addLinkedService(inputService);
            inputs.push(inputService);
        });
        this.inputServices = inputs;
    }

    private generateUUID(): string { // Public Domain/MIT
        var d = new Date().getTime();
        if (typeof performance !== 'undefined' && typeof performance.now === 'function') {
            d += performance.now(); //use high-precision timer if available
        }
        return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function (c) {
            var r = (d + Math.random() * 16) % 16 | 0;
            d = Math.floor(d / 16);
            return (c === 'x' ? r : (r & 0x3 | 0x8)).toString(16);
        });
    }

    /**
     * Called by homebridge to gather services for this accessory.
     */
    getServices(): Array<HAPNodeJS.Service> {
        let services: Array<HAPNodeJS.Service> = [this.televisionService!, this.televisionSpeakerService!];
        this.inputServices.forEach((service: HAPNodeJS.Service | undefined) => {
            services.push(service!);
        });
        return (services);
    }
}