pelias-openstreetmap/stream/deduper.js

Pelias openstreetmap utilities

var through = require('through2');
var peliasConfig = require( 'pelias-config' ).generate();
var addressDedupeStream = require( 'pelias-address-deduplicator' );
var sendPassthroughStream = require('../util/sendPassthroughStream');

/**
 * Generate a stream object that will handle the address deduplication when enabled.
 * When disabled, generate a passthrough stream.
 *
 * @param {object} [config]
 * @param {object} [deduper]
 * @returns {Stream}
 */
function createStream(config, deduper) {
  config = config || peliasConfig;
  deduper = deduper || addressDedupeStream;

  if (!config.imports || !config.imports.openstreetmap) {
    return sendPassthroughStream();
  }
  // if deduping is enabled, create the deduper stream
  // otherwise create a passthrough stream that does nothing
  if (config.imports.openstreetmap.deduplicate) {
    return deduper();
  }
  else {
    return sendPassthroughStream();
  }
}

module.exports = createStream;