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AppInsights helper

a typescript wrapper for Application Insights

import { trackException } from './appinsights-helper'

trackException({ exception: error })

	import NodeCache from 'node-cache'; // or 'redis'

	class CacheService {

	constructor(ttlSeconds) {
	// this could also be redis
	this.cache = new NodeCache({ stdTTL: ttlSeconds, checkperiod: ttlSeconds * 0.2, useClones: false });
	}

	get(key, storeFunction) {

	const { ServiceBusClient, ReceiveMode } = require('@azure/service-bus')

	const connectionString = process.env['servicebus-connection']

	async function send () {
	const sbClient = ServiceBusClient.createFromConnectionString(connectionString)
	const client = sbClient.createTopicClient('topic-name')
	const sender = client.createSender()
	// set label=TEST for use in subscription filter
	const msg = { label: 'TEST', body: { foo: 'bar', ts: new Date() } }

	import * as rp from 'request-promise-native'

	function convertTable (columns: any[], rows: any[]): any[] {
	return rows.map((row: any[]) => columns.reduce((obj, col, idx) => {
	obj[col.name] = row[idx]
	return obj
	}, {}))
	}

	// API reference @ https://dev.applicationinsights.io/reference

	Object.getOwnPropertyNames(Date.prototype)
	.filter(name => name.startsWith('to'))
	.map(method => `${method}: ${(new Date())[method]()}`)

	function numToColor (num, maxHue = 350, minHue = 0) {
	const hue = num * (maxHue - minHue) + minHue
	return `hsl(${hue}, 70%, 45%)`
	}