Template snippet allowing for regions to be shown as a list

global_helpers.js

import { Template } from 'meteor/templating';

Template.registerHelper("regionsList", function(){
  if(Template.instance().regionList){
      return Template.instance().regionList.get()
  }
});

methods.js

import { ValidatedMethod } from 'meteor/mdg:validated-method';
import { Meteor } from 'meteor/meteor';
import { EC2, Credentials } from 'aws-sdk'

// You should NOT store your access keys in your source code, this is purely for demo purposes. 
// Store them in your meteor settings or expose them as environment variables.

const AWS_ACCESS_KEY = 'XXXYOUR_AWS_API_ACCESS_KEYXXX'
const AWS_SECRET_KEY = 'XXYOUR_AWS_API_SECRET_KEYXXX'

export const getAwsRegions = new ValidatedMethod({
  name: 'getAwsRegions',
  validate: null,
  run(){
    const AwsAuth = new Credentials(AWS_ACCESS_KEY, AWS_SECRET_KEY);
    const ec2 = new EC2({credentials: AwsAuth, region: 'us-east-1'});
    let regions = [];
    let resp = ec2.describeRegions({},function(err, data){
      if(err){
        return err;
      }
    }).promise();

    result = resp.then(function(data) {
      return data.Regions.map(function(regionObj){return regionObj.RegionName})
    }).catch(function(err) {
      throw new Meteor.Error('get-regions-error', err.message)
    });

    return result;
  }
});

MyTemplate.js

import { ReactiveVar } from 'meteor/reactive-var';

Template.MyTemplate.onCreated(function(){
  this.bucketList = new ReactiveVar([]);
})

Template.MyTemplate.onRendered(function(){
  Meteor.call('getAwsRegions', function(error, result){
    if(error){
      Bert.alert({
        title: error.error,
        message: error.reason ,
        type: 'danger',
      });
      console.log(error);
    }
    template.regionList.set(result);
  });
});

region-list-template.html

<template name="MyTemplate">
  <div>
      {{#each region in regionsList }}
      <div>
          <h4>{{region}}</h4>
      </div>
      {{/each}}
  </div>
</template>