AdminController.js

/**
 * HomeController
 *
 * @description :: Server-side logic for managing Homes
 * @help        :: See http://sailsjs.org/#!/documentation/concepts/Controllers
 */
"use strict";

const co = require('co');
var map = require('../services/GoogleStaticMapAPI');

module.exports = {
  index: (req, res) => {
    res.view("pages/admin/locations.swig");
  },
  createRoom: (req, res) => {
    co(function *(){
      res.view("pages/admin/create.swig");
    });
  },
  locationDetail: (req, res) => {
    co(function *(){
      let locationId = req.params.location_id;
      return yield Locations.findOne({where: {locationId:locationId}});
    }).then((location) => {
      sails.log(location);
      if(location){
    	  var locationpoint = [ location.latitude,location.longitude ].toString();
    	  map.getImage(locationpoint, 'url').then(function(value){
    		  sails.log('2');
    		  res.view('pages/admin/detail.swig', {
    			  location: location, 
    			  imageurl: value
    		  });
    	  }).catch(function(error){
    		  sails.log.serverError(error);
    	  });
    	  sails.log('3');
      }
      else{
        res.notFound();
      }
      sails.log('4');
    }).catch((err) => {
      return res.serverError(err);
    });
  }
};

GoogleStaticMapAPI.js

"use strict";

const map = require('googlemaps');
const config = require('../../config/googlemap');

module.exports = {
		getImage: (locationpoint, option) => {
			return new Promise(function (resolve, reject) {
				if(option != 'url' || option != 'binary'){
					reject(new Error('StaticMapAPI param : ' + option));
				}

				var gmAPI = new map(config);
				var params = {
						center: locationpoint,
						zoom: 15,
						size: '500x400',
						maptype: 'roadmap',
						style: [
						        {
						        	feature: 'road',
						        	element: 'all',
						        	rules: {
						        		hue: '0x00ff00'
						        	}
						        }
						        ]
				};
				
				if(option == 'url'){
					var imageurl = gmAPI.staticMap(params); // return static map URL
					sails.log(imageurl);
					resolve(imageurl);
					sails.log('1');
				}else{
					// fetch asynchronously the binary image
					gmAPI.staticMap(params, function(err, binaryImage) {
						if(err) reject(new Error(err));
						resolve(binaryImage);
					});
				}
			});
		}
};