ITG-Infoskarm API

This project is a working WIP. It does not have all planned features.

API

vasttrafik.BaseAPIRequester

The BaseAPIRequester is not supposed to be used for anything except as a template for an HTTP request class.

Usage

This class is not for use as all methods included will throw an error. The BaseAPIRequester should only be used to extend another class that implements the HTTPThrottler.HTTPThrottled interface.

class FooAPIRequester extends BaseAPIRequester {
    constructor() {
        super()
    }

    public requestIsAllowed() {
        return true
    }

    public performRequest(options) {
        return axios(options)
    }
}

vasttrafik.APIRequester

The APIRequester is an implementation of HTTPThrottler.HTTPThrottled that extends BaseAPIRequester with a token bucket.

Usage

Create an instance

This example will create an instance of APIRequster allowing 10 requests per minute.

const vasttrafikAPIRequester = new vasttrafik.APIRequester(10, 60000)

Methods

performRequest

Perform a request using axios.

apiRequester.performRequest({
    url: "https://httpbin.org/get",
    method: "GET"
}).then((response) => {
    // Consume response
}).catch((error) => {
    // Handle errors
})

requestIsAllowed

Check if a HTTP request is allowed or not.

if (apiRequester.requestIsAllowed()) {
    // Perform a request
} else {
    // Do not perform a request
}

refillTokens

Refill tokens to the token bucket to make sure there are token left to make HTTP requests. This is typically not necessary as this method is called with requestIsAllowed. The token bucket will refill if the time when the token bucket was refilled plus the amount of milliseconds passed to the constructor has passed.

apiRequester.refillTokens()

vasttrafik.API

The API is used to perform HTTP requests to Västtrafik's API.

Usage

Create an instance

const vasttrafikAPI = new vasttrafik.API("<västtrafik API access token>", vasttrafikAPIRequester)

Methods

getDepartures

Get JSON from Västtrafik's journey planner API version v2 for the /departureBoard endpoint. Returns the parsed response as an object according to the type vasttrafik.Stop.

vasttrafikAPI.getDepartures("9022014001960001", new Date(), 60, false).then((stop) => {
    // Consume stop
}).catch((error) => {
    // Handle errors
})

Todo

• Add methods to vasttrafik.API for endpoints in Västtrafik's journey planner API version v2
• Write documentation on how to get started using ITG-Infoskarm-API
  • Dependencies
    • Node version
    • Firebase
    • And more
• Contribution guidelines

License

MIT License

Copyright © 2017-2021 Joel Ericsson