awesome-cordova-plugins/src/@ionic-native/plugins/google-nearby/index.ts

import { Injectable } from '@angular/core';
import { Cordova, IonicNativePlugin, Plugin } from '@ionic-native/core';
import { Observable } from 'rxjs/Observable';

/**
 * @name Google Nearby
 * @description
 * This plugin adds support for the Google Nearby Messages API.
 *
 * @usage
 * ```typescript
 * import { GoogleNearby } from '@ionic-native/google-nearby';
 *
 *
 * constructor(private googleNearby: GoogleNearby) { }
 *
 * this.googleNearby.publish('Hello')
 *   .then((res: any) => console.log(res))
 *   .catch((error: any) => console.error(error));
 *
 * this.googleNearby.subscribe()
 *   .then((res: any) => console.log(res))
 *   .catch((error: any) => console.error(error));
 * ```
 */
@Plugin({
  pluginName: 'GoogleNearby',
  plugin: 'cordova-plugin-google-nearby',
  pluginRef: 'window.nearby',
  repo: 'https://github.com/hahahannes/cordova-plugin-google-nearby',
  install:
    'ionic cordova plugin add cordova-plugin-google-nearby --variable API_KEY="123456789"',
  installVariables: ['API_KEY'],
  platforms: ['Android']
})
@Injectable()
export class GoogleNearby extends IonicNativePlugin {
  /**
   * Publish a message
   * @param message {string} Message to publish
   * @return {Promise<any>} Returns a promise that resolves when the message got published
   */
  @Cordova()
  publish(message: string): Promise<any> {
    return;
  }

  /**
   * Subscribe to receive messages
   * @return {Observable<any>} Returns an observable that emits received messages
   */
  @Cordova({
    observable: true,
    clearFunction: 'unsubscribe'
  })
  subscribe(): Observable<any> {
    return;
  }
}