OpenTransport Client

The OpenTransport Client offers a simplified integration of the Swiss Public Transport API into a Golang project. The corresponding documentation of the API can be found here: https://transport.opendata.ch/docs.html

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Restrictions

• The number of queries against the API are limited.
• Issues of the API are tracked here.

Content

• Usage
• Example
• Documentation
• Showcase
• Development
• Contribution
• Changelog
• License
• Author

Install

You need a working golang 1.14+ environment on your machine. If this is not the case, use this guide to getting started.

go get -v github.com/minderjan/opentransport-client/opentransport

Usage

The library is separated into different services. These are accessible via an instance of the OpenTransport Client.

Example

package main

import  (
	"fmt"
	"context"
	"github.com/minderjan/opentransport-client/opentransport"
	"time"
)

func main() { 
	// Create a new Client 
	client := opentransport.NewClient()

	// Query a location
	locations, _ := client.Location.Search(context.Background(), "Zürich HB")
	for _, s := range locations {
		fmt.Printf("%s\n", s.Name)
	}

	// Query a connection
	connResult, _ := client.Connection.Search(context.Background(), "Zürich HB", "Bern", time.Now())
	for _, c := range connResult.Connections {
		s := c.Sections[0] // first part of the connection
		fmt.Printf("%s %s at %s on platform %s\n", s.Journey.Category, s.Journey.Number, s.Departure.Departure.Time.Format("15:04"), s.Departure.Platform)
	}

	// Query a stationboard
	stbResult, _ := client.Stationboard.Search(context.Background(), "Zürich HB")
	for _, j := range stbResult.Journeys {
		fmt.Printf("Departure at %s (%s)%s to %s\n", j.Stop.Departure.Time.Format("15:04"), j.Category, j.Number, j.To)
	}
}

There are more working examples available in example directory. Use these to get inspired.

go run example/name-of-example/main.go

Documentation

A detailed documentation of the package is available on Godoc

Showcase

There is one showcase available which demonstrates the functionality of the package with a real world use case.

• Terminal Stationboard UI

Development

1. Setup a local Golang Environment. Use Go 1.14+
2. Clone the repository somewhere on your machine or put it in your GOPATH
3. Start a mocked API or use the prod API to test your requests (see in dev directory)

Dev client

Run client with a preconfigured remote url at http://localhost:3001/v1/.

go run dev/client.go

Run Tests

Tests can be executed within the root directory of this repository.

go test -v -covermode=count -coverprofile=bin/coverage.out ./opentransport

Integration tests are not part of the pipeline (because of the api rate limit). You can run these tests by providing an integration build tag.

go test -v -tags=integration ./opentransport

Visualize the Code Coverage as Website

go tool cover -html=bin/coverage.out

Logging

The library does not produce log messages by default. However, this can be adjusted. You can either enable logging with an empty io.Writer to write to os.stdout.

// Write to stdout and stderr
client.EnableLogs(nil)

You can also define your own output, for example to write the logs to a file.

// Create a logfile
f, _ := os.OpenFile("opentransport.log", os.O_RDWR|os.O_CREATE|os.O_APPEND, 0666)

// Create new multi writer
multi := io.MultiWriter(f, os.Stdout)

// Write to stdout and the logfile
client.EnableLogs(multi)

Contribution

You're welcome to contribute to this repository. Please be aware of our Code of Conduct and Contribution Guidelines.

Changelog

• v0.1.0 Initial Version

License

This software is licensed under a MIT license

Author

This library was created as part of a diploma thesis at the Juventus School in Zurich by Jan Minder