hiposfer.kamal.parsers.gtfs.core — hiposfer/kamal 0.11.0

namespace for parsing a GTFS feed into a Datascript transaction.

The algorithms coerces GTFS csv files into entities that reference each other through IDs. The IDs are taken directly from GTFS.

A small dynamic renaming is performed to make it more compatible with Datascript design. The renaming is based on the GTFS naming convention, for example: stop_lon, stop_url, trip_id, trip_headsign, etc.

We transform those strings into: :stop/lon, :stop/url, :trip/id, :trip/headsign.

This is important to be able to create relationships between entities through transactions, for example {:trip/id 1, :trip/route [:route/id 1]}. This allows us to create relationships between entities without actually having them, i.e. thread them simply as data

datomize! clj

(datomize! zipstream)

takes a map of gtfs key-name -> content and returns a sequence of maps ready to be used for transact

days clj

file-ns clj

links clj

ns-keys clj

preparer clj

map of GTFS filenames to post-processing functions. Useful to remove unnecessary information from the GTFS feed; just to reduce the amount of datoms in datascript

respace clj

(respace k)

takes a keyword and a set of keywords and attempts to convert it into a namespaced keyword using the set possibilities. Returns a qualified keyword with the matched ns

service clj

(service calendar)

transforms a calendar entry into a [id Service], where Service contains the period and set of days that applies. Preferable representation to speed up comparisons