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    @homebridge/plugin-ui-utils
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    Homebridge Plugin Custom UI Utils

    The package assists plugin developers creating fully customisable configuration user interfaces for their plugins.

    Implementation

    A plugin's custom user interface has two main components:

    • User Interface - this is the HTML / CSS / JavaScript code the users interact with
    • Server - this is an optional server side script that provides endpoints the UI can call

    Project Layout

    A custom UI should be published under a directory named homebridge-ui:

    • homebridge-ui/public/index.html - required - this is the plugin UI entry point.
    • homebridge-ui/public/ - you can store any other assets (.css, .js, images etc.) in the public folder.
    • homebridge-ui/server.js - optional - this is the server side script containing API endpoints for your plugin UI.
    • config.schema.json - required - set customUi to true in the schema to enable custom UI.

    Basic structure example:

    homebridge-example-plugin/
    ├── homebridge-ui
    │   ├── public
    │   │   └── index.html
    │   └── server.js
    ├── config.schema.json
    ├── package.json

    You may customise the location of the homebridge-ui by setting the customUiPath property in the config.schema.json. For example: "customUiPath": "./dist/homebridge-ui".

    User Interface API

    A plugin's custom user interface is displayed inside an iframe in the settings modal, in place of the schema-generated form.

    The user interface API is provided to the plugin's custom UI via the window.homebridge object. This is injected into the plugin's custom UI during render.

    Note:

    • Developers are free to use front end frameworks such as Angular, Vue, or React to create the plugin's custom user interface.
    • Developers should make use Bootstrap 4 CSS classes, as these will automatically be styled and themed correctly. There is no need to include the boostrap css yourself, this will be injected by the Homebridge UI during render.
    • As the user interface is displayed in an isolated iframe, you can safely use any custom JavaScript and CSS.
    • The index.html file should not include <html>, <head>, or <body> tags, as these are added by the Homebridge UI during the render process.
    • You may include external assets in your HTML.

    Example index.html:

    <link rel="stylesheet" href="your-plugin.css">
    
    <div class="card">
      <div class="form-group">
        <label for="exampleInputEmail1">Email address</label>
        <input type="email" class="form-control" id="exampleInputEmail1" aria-describedby="emailHelp">
        <small id="emailHelp" class="form-text text-muted">Help text...</small>
      </div>
    </div>
    
    <script>
    (async () => {
      // get the current homebridge config
      const pluginConfig = await homebridge.getPluginConfig();
    
      // make requests to your server.js script
      const result = await homebridge.request('/hello', { name: 'world' });
    })();
    </script>

    Config

    homebridge.getPluginConfig

    homebridge.getPluginConfig(): Promise<PluginConfig[]>;

    Returns a promise that resolves an array of accessory or platform config blocks for the plugin.

    An empty array will be returned if the plugin is not currently configured.

    const pluginConfigBlocks = await homebridge.getPluginConfig();
    // [{ platform: 'ExamplePlatform', name: 'example' }]

    homebridge.updatePluginConfig

    homebridge.updatePluginConfig(pluginConfig: PluginConfig[]): Promise<PluginConfig[]>;

    Update the plugin config.

    • pluginConfig: A full array of platform and accessory config blocks.

    This should be called whenever a change to the config is made.

    This does not save the plugin config to disk.

    Existing blocks not included will be removed.

    const pluginConfig = [
      {
        name: 'my light 1',
        accessory: 'ExampleAccessory'
      },
      {
        name: 'my light 2',
        accessory: 'ExampleAccessory'
      }
    ]
    
    await homebridge.updatePluginConfig(pluginConfig);

    homebridge.savePluginConfig

    homebridge.savePluginConfig(): Promise<void>

    Saves the plugin config changes to the Homebridge config.json. This is the equivalent of clicking the Save button.

    This should be used sparingly, for example, after a access token is generated.

    You must call await homebridge.updatePluginConfig() first.

    // update config first!
    await homebridge.updatePluginConfig(pluginConfig);
    
    // save config
    await homebridge.savePluginConfig();

    homebridge.getPluginConfigSchema

    homebridge.getPluginConfigSchema(): Promise<PluginSchema>;

    Returns the plugin's config.schema.json.

    const schema = await homebridge.getPluginConfigSchema();

    homebridge.getCachedAccessories

    homebridge.getCachedAccessories(): Promise<CachedAccessory[]>;

    Returns the any cached accessories for the plugin

    const cachedAccessories = await homebridge.getCachedAccessories();

    Requests

    This allows the custom UI to make API requests to their server.js script.

    homebridge.request

    homebridge.request(path: string, body?: any): Promise<any>

    Make a request to the plugin's server side script.

    • path: the path handler on the server that the request should be sent to
    • body: an optional payload

    Returns a promise with the response from the server.

    User Interface Example:

    const response = await homebridge.request('/hello', { who: 'world' });
    console.log(response); // the response from the server

    The corresponding code in the server.js file would look like this:

    // server side request handler
    this.onRequest('/hello', async (payload) => {
      console.log(payload) // the payload sent from the UI
      return { hello: 'user' };
    });

    Toast Notifications

    Toast notifications are the pop-up notifications displayed in the bottom right corner. A plugin's custom UI can generate custom notifications with custom content.

    homebridge.toast.success

    homebridge.toast.success(message: string, title?: string): void

    Shows a green "success" notification.

    • message: the toast content
    • title: an optional title

    homebridge.toast.error

    homebridge.toast.error(message: string, title?: string): void

    Shows a red "error" notification.

    • message: the toast content
    • title: an optional title

    homebridge.toast.warning

    homebridge.toast.success(message: string, title?: string): void

    Shows an amber "warning" notification.

    • message: the toast content
    • title: an optional title

    homebridge.toast.info

    homebridge.toast.success(message: string, title?: string): void

    Shows a blue "info" notification.

    • message: the toast content
    • title: an optional title

    Modal

    homebridge.closeSettings

    homebridge.closeSettings(): void

    Close the settings modal.

    This action does not save any config changes.

    homebridge.closeSettings();

    homebridge.showSpinner

    homebridge.showSpinner(): void

    Displays a spinner / loading overlay, preventing user input until cleared with homebridge.hideSpinner.

    // show the spinner overlay
    homebridge.showSpinner();
    
    // wait for the request to process
    await homebridge.request('/hello');
    
    // hide the spinner overlay
    homebridge.hideSpinner();

    homebridge.hideSpinner

    homebridge.hideSpinner(): void

    Hide the spinner / loading overlay.

    homebridge.hideSpinner();

    Forms

    The custom user interface allows you to create two types of forms:

    1. A form based on your plugin's config.schema.json file
      • User input is automatically mapped to the plugin config object
      • You can listen for change events from your custom user interface
      • The schema must contain all config options
    2. A standalone form
      • Not linked to your config.schema.json form in any way
      • You must listen for change events, process the event, and update the plugin config
      • The form does not need to include all config options

    Developers are also able to create their own forms using HTML.

    homebridge.showSchemaForm

    homebridge.showSchemaForm(): void

    Show the schema-generated form below the custom user interface. This feature only works for platform plugins that have set singular = true in their config.schema.json file.

    homebridge.showSchemaForm();

    When enabling the schema form, you should listen for the configChanged event to keep your config in sync. This event is triggered whenever the user makes a change in the schema-generated form (250ms debounce).

    window.homebridge.addEventListener('configChanged', (event: MessageEvent) => {
      console.log('Updated config:', event.data);
    });

    homebridge.hideSchemaForm

    homebridge.hideSchemaForm(): void

    Hides the schema-generated form.

    homebridge.hideSchemaForm();

    homebridge.createForm

    homebridge.createForm(schema: FormSchema, data: any): IHomebridgeUiFormHelper;

    Create a new standalone form. You may pass in an arbitrary schema using the same options as the config.schema.json.

    Only one standalone form can be displayed at a time. The main config-schema based form cannot be shown while a standalone form is being displayed.

    • schema: The form schema object, may also contain layout metadata
    • data: The initial form data
    • submitButton: String. Optional label for a submit button, if not provided, no submit button will be displayed
    • cancelButton: String. Optional label for a cancel button, if not provided, no cancel button will be displayed

    Example:

    // create the form
    const myForm = homebridge.createForm(
       {
          schema: {
            type: 'object',
            properties: {
              name: {
                title: 'Name',
                type: 'string',
                required: true,
              }
            }
          },
          layout: null,
          form: null,
       },
       {
          name: 'initial name value'
       }
    );
    
    // watch for change events
    myForm.onChange((change) => {
      console.log(change);
    });
    
    // watch for submit button click events
    myForm.onSubmit((form) => {
      console.log(form);
    });
    
    // watch for cancel button click events
    myForm.onCancel((form) => {
      console.log(form);
    });
    
    // stop listening to change events and hide the form
    myForm.end();

    Events

    The homebridge object is an EventTarget, this allows you to use the browsers built in addEventListener and removeEventListener functions to subscribe and unsubscribe from events.

    Ready Event

    Called when the Homebridge UI has completed rendering the plugin's custom UI.

    homebridge.addEventListener('ready', () => {
      // do something with event
    });

    Custom Events

    Custom events can be pushed from the plugin's server.js script.

    UI Example:

    homebridge.addEventListener('my-event', (event) => {
      console.log(event.data); // the event payload from the server
    });

    The corresponding code in the server.js file would look like this:

    this.pushEvent('my-event', { some: 'data' });

    Plugin / Server Information

    homebridge.plugin

    homebridge.plugin

    Is an object that contains plugin metadata.

    {
      name: string;
      description: string;
      installedVersion: string;
      latestVersion: string;
      verifiedPlugin: boolean;
      updateAvailable: boolean;
      publicPackage: boolean;
      links: {
        npm: string;
        homepage?: string;
      }
    }

    homebridge.serverEnv

    homebridge.serverEnv

    Is an object containing some server metadata

    {
      env: {
        platform: string;       // darwin, win32, linux, freebsd etc.
        nodeVersion: string;    // Node.js version
      }
    }

    Server API

    To provide server API endpoints that can be called from the custom UI, a plugin must place a server.js file in the homebridge-ui directory.

    You will need to include the @homebridge/plugin-ui-utils library as a prod dependency:

    npm install --save @homebridge/plugin-ui-utils
    

    Note:

    • This server.js script will be spawned as a child process when the plugin's settings modal is opened, and is terminated when the settings modal is closed.
    • The server.js script must create a new instance of a class that extends HomebridgePluginUiServer from the @homebridge/plugin-ui-utils library.
    • This file will be spawned as a child process when the plugin's settings modal is opened, and is terminated when the settings modal is closed.
    • The server side script must extend the class provided by the @homebridge/plugin-ui-utils library.

    Example server.js:

    const { HomebridgePluginUiServer } = require('@homebridge/plugin-ui-utils');
    
    // your class MUST extend the HomebridgePluginUiServer
    class UiServer extends HomebridgePluginUiServer {
      constructor () { 
        // super must be called first
        super();
    
        // Example: create api endpoint request handlers (example only)
        this.onRequest('/hello', this.handleHelloRequest.bind(this));
    
        // this.ready() must be called to let the UI know you are ready to accept api calls
        this.ready();
      }
    
      /**
       * Example only.
       * Handle requests made from the UI to the `/hello` endpoint.
       */
      async handleHelloRequest(payload) {
        return { hello: 'world'; }
      }
    }
    
    // start the instance of the class
    (() => {
      return new UiServer;
    })();

    Setup

    this.ready

    this.ready(): void

    Let the UI know the server is ready to accept requests.

    this.ready();

    Request Handling

    this.onRequest

    this.onRequest(path: string, fn: RequestHandler)

    Handle requests sent from the UI to the given path.

    • path: the request path name
    • fn: a function to handle the incoming requests

    The value returned/resolved from the request handler function will be sent back to the UI as the request response.

    Example creating a request handler on the server:

    // server side code
    this.onRequest('/hello', async (payload) => {
      console.log(payload) // the payload sent from the UI
      return { hello: 'user' };
    });

    The corresponding call in the UI to send requests to this endpoint:

    // ui code
    const response = await homebridge.request('/hello', { who: 'world' });
    console.log(response); // the response from the server

    Request Error Handling

    If you need to throw an error during your request, you should throw an instance of RequestError instead of a normal Error:

    Example:

    // server side code
    const { RequestError } = require('@homebridge/plugin-ui-utils');
    
    this.onRequest('/hello', async (payload) => {
      // something went wrong, throw a RequestError:
      throw new RequestError('Something went wrong!', { status: 404 });
    });

    You can then catch this in the UI:

    try {
      await homebridge.request('/hello', { who: 'world' });
    } catch (e) {
      console.log(e.message); // 'Something went wrong!'
      console.log(e.error); // { status: 404 }
    }

    Uncaught errors in event handlers, or errors thrown using new Error will still result in the waiting promise in the UI being rejected, however the error stack trace will also be shown in the Homebridge logs which should be avoided.

    Push Events

    this.pushEvent

    this.pushEvent(event: string, data: any)

    Push events allow you to send data to the UI, without needed the UI to request it first.

    • event: a string to describe the event type
    • data: any data to send as an event payload to the UI.

    Example pushing an event payload to the UI:

    this.pushEvent('my-event', { some: 'data' });

    The corresponding code to watch for the event in the UI:

    homebridge.addEventListener('my-event', (event) => {
      console.log(event.data); // the event payload from the server
    });

    Server Information

    this.homebridgeStoragePath

    this.homebridgeStoragePath: string

    Returns the Homebridge instance's current storage path.

    const storagePath = this.homebridgeStoragePath;

    this.homebridgeConfigPath

    this.homebridgeConfigPath: string

    Returns the path to the Homebridge config.json file:

    const configPath = this.homebridgeConfigPath;

    this.homebridgeUiVersion

    this.homebridgeUiVersion: string

    Returns the version of the Homebridge UI:

    const uiVersion = this.homebridgeUiVersion;

    Examples

    • Basic Example - demos a minimal custom user interface, interacting with server side scripts, updating the plugin config, and using toast notifications.
    • Push Events - demos how to send push events from the server, and listen for them in the custom user interface.

    A full list of plugins that have implemented the custom user interface can be found here.

    homebridge-mercedesme

    The homebridge-mercedesme plugin by @SeydX allows users to pair their vehicle using a custom user interface:

    homebridge-bravia-tvos

    The homebridge-bravia-tvos plugin by @SeydX allows users to pair and dynamically configure a user's TV using a custom user interface:

    homebridge-electra-smart

    The homebridge-electra-smart plugin by nitaybz allows users to request a OTP and enter it in exchange for an authentication token:

    Development

    For hints and tips on how to develop your custom user interface, see DEVELOPMENT.md.

    Install

    npm i @homebridge/plugin-ui-utils

    DownloadsWeekly Downloads

    3,929

    Version

    0.0.19

    License

    MIT

    Unpacked Size

    82.2 kB

    Total Files

    25

    Last publish

    Collaborators

    • oznu
    • northernman
    • supereg
    • khaost
    • ebaauw
    • donavanbecker
    • dustin.greif
    • nfarina