jdf2gtfs

a javascript dependency to convert Czechoslovak JDF timetable format to GTFS

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What is this?

A Dependency used by IsItHere to create GTFS feeds from JDF packaged timetables. This is a simple, db-less and customisable dependency.

Usage

import { JDF2GTFS } from "jdf2gtfs";
import fs from "fs/promises"

const file = await fs.readFile("/path/to/jdf.zip")
const arrayBuffer = file.buffer.slice(file.byteOffset, file.byteOffset + file.byteLength)

const runner = new JDF2GTFS({
    fileProvider: {
        type: "zipbuffer",
        contents: arrayBuffer
    },
    locations: {},
    stop_codes: {},
    platforms: [{
        parent: "5000501",
        code: "A",
        location: [48.8748300, 18.0489801]
    }],
    timezone: "Europe/Bratislava",
})

const output = await runner.makeAll()
await fs.writeFile("./gtfs.zip", Buffer.from(output))

The library is isomorphic — fileProvider.contents is a plain ArrayBuffer, so the same code works in Node.js, browsers, Deno, and Bun. In a browser, get the ArrayBuffer from fetch(...).then(r => r.arrayBuffer()) or file.arrayBuffer() instead.