derhuerst / hafas-discover-stations Goto Github PK

Pass in a HAFAS client, discover stations by querying departures.

License: ISC License

JavaScript 100.00%

hafas public-transport transit graph hafas-client

hafas-discover-stations's Introduction

hafas-discover-stations

Pass in a HAFAS client, discover stops/stations by querying departures. It tries to find all stops/stations that all trains known by the endpoint stop at.

Installing

npm install hafas-discover-stations

Usage

import {createWalkAndDiscoverStations as createWalk} from 'hafas-discover-stations'
import {createClient as createHafas} from 'hafas-client'
import {profile as dbProfile} from 'hafas-client/p/db/index.js'

const hafas = createHafas(dbProfile, 'my-awesome-program')
const walk = createWalk(hafas)

const berlinFriedrichstr = '8011306' // where to start
for await (const stopOrStation of walk(berlinFriedrichstr)) {
	console.log(stopOrStation)
}

walk() returns a readable stream in object mode. It emits the following events:

data: a new stop/station that has been discovered
stats: an object with the following keys:
- stopsAndStations: the number of stops/stations discovered
- edges: the number of edges discovered
- totalReqs: the number of requests sent
- avgReqDuration: the average duration of the last 30 requests
- queuedReqs: the number of queued requests
edge: a connection between two stops/stations, with the following keys:
- source: a Friendly Public Transport Format 1.2.0 stop/station object
- target: a Friendly Public Transport Format 1.2.0 stop/station object
- duration: time to travel, in milliseconds
- line: a Friendly Public Transport Format 1.2.0 line object

API

walk(stationId, [opt])

opt may have the following keys. It will be passed into queue().

concurrency: number of requests run in parallel – default: 2
timeout: timeout for a single job in milliseconds – default: 10000
parseStationId: an optional function to process station IDs – default: id => id
stationLines: Query lines of stops/stations? – default: false
shouldQueryDeparturesAt(stopId, nrOfHops): Should departures be queries from this stopId, effectively continuing the graph search? – default: () => true

Contributing

If you have a question or need support using hafas-discover-stations, please double-check your code and setup first. If you think you have found a bug or want to propose a feature, use the issues page.

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    at onLeg (/home/travis/build/derhuerst/hafas-discover-stations/index.js:127:4)
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bb00371 Clarify a comment (#280)
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derhuerst / hafas-discover-stations Goto Github PK

hafas-discover-stations's Introduction

hafas-discover-stations

Installing

Usage

API

Contributing

hafas-discover-stations's People

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hafas-discover-stations's Issues

The dependency queue was updated from 4.5.0 to 4.5.1.

The dependency luxon was updated from 1.7.1 to 1.8.0.

The dependency luxon was updated from 1.4.5 to 1.4.6.

The dependency ansi-escapes was updated from 3.1.0 to 3.2.0.

The dependency mri was updated from 1.1.1 to 1.1.2.

The dependency luxon was updated from 1.4.1 to 1.4.2.

The dependency luxon was updated from 1.4.2 to 1.4.3.

The dependency luxon was updated from 1.6.2 to 1.7.0.

The dependency luxon was updated from 1.3.3 to 1.4.0.

The dependency luxon was updated from 1.8.0 to 1.8.1.

The dependency luxon was updated from 1.19.3 to 1.20.0.

The devDependency through2 was updated from 2.0.3 to 2.0.4.

The dependency luxon was updated from 1.4.3 to 1.4.4.

The dependency luxon was updated from 1.4.4 to 1.4.5.

The dependency mri was updated from 1.1.4 to 1.1.5.

Patches

Chores

The dependency debug was updated from 4.0.1 to 4.1.0.

Minor Changes

The devDependency through2 was updated from 2.0.4 to 2.0.5.

Version 1.3.1 of luxon was just published.

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The dependency queue was updated from `4.5.0` to `4.5.1`.

The dependency luxon was updated from `1.7.1` to `1.8.0`.

The dependency luxon was updated from `1.4.5` to `1.4.6`.

The dependency ansi-escapes was updated from `3.1.0` to `3.2.0`.

The dependency mri was updated from `1.1.1` to `1.1.2`.

The dependency luxon was updated from `1.4.1` to `1.4.2`.

The dependency luxon was updated from `1.4.2` to `1.4.3`.

The dependency luxon was updated from `1.6.2` to `1.7.0`.

The dependency luxon was updated from `1.3.3` to `1.4.0`.

The dependency luxon was updated from `1.8.0` to `1.8.1`.

The dependency luxon was updated from `1.19.3` to `1.20.0`.

The devDependency through2 was updated from `2.0.3` to `2.0.4`.

The dependency luxon was updated from `1.4.3` to `1.4.4`.

The dependency luxon was updated from `1.4.4` to `1.4.5`.

The dependency mri was updated from `1.1.4` to `1.1.5`.

The dependency debug was updated from `4.0.1` to `4.1.0`.

The devDependency through2 was updated from `2.0.4` to `2.0.5`.