tidepool-dexcom-stream

dexcom-stream

Streaming parser for Dexcom CGM text exports.

Install

$ npm install dexcom-stream

Usage

var fs = require('fs'),
    es = require('event-stream'),
    dxcom = require('dexcom-stream'),
 
var stream = fs.createReadStream('./examples/dexcom_sample_with_and_without_meter_calibration.csv');
 
es.pipeline(stream, dxcom.sugars( )
  , es.map( function (data, cb) {
      // do something with each record
      console.log(data);
      cb(null, data); // make sure you call cb.
 
    })
  , es.writeArray( function(err, readings) {
      // do something with all readings
      console.log('Done parsing', readings);
    })
);

Example: print everything to stdout

if (!module.parent) {
  es.pipeline(
      process.openStdin( )
    , dxcomParser.sugars( )
    , es.writeArray(function (err, data) {
      console.log('records', data);
      console.log('FOUND ', data.length, 'records');
 
    })
  );
}

cat examples/dexcom_sample_with_and_without_meter_calibration.csv | head | node examples/example.js
records [ { value: '156', type: 'cbg', time: '2012-12-20T02:28:46' },
  { value: '171', type: 'cbg', time: '2012-12-20T02:33:45' },
  { value: '162', type: 'cbg', time: '2012-12-20T02:38:45' },
  { value: '167', type: 'cbg', time: '2012-12-20T02:43:45' },
  { value: '163', type: 'cbg', time: '2012-12-20T02:48:45' },
  { value: '177', type: 'cbg', time: '2012-12-20T02:53:45' },
  { value: '184', type: 'cbg', time: '2012-12-20T02:58:45' },
  { value: '187', type: 'cbg', time: '2012-12-20T03:03:45' },
  { value: '188', type: 'cbg', time: '2012-12-20T03:08:45' } ]
FOUND  9 records

records [ { value: '156', type: 'cbg', time: '2012-12-20T02:28:46' }, { value: '171', type: 'cbg', time: '2012-12-20T02:33:45' }, { value: '162', type: 'cbg', time: '2012-12-20T02:38:45' }, { value: '167', type: 'cbg', time: '2012-12-20T02:43:45' }, { value: '163', type: 'cbg', time: '2012-12-20T02:48:45' }, { value: '177', type: 'cbg', time: '2012-12-20T02:53:45' }, { value: '184', type: 'cbg', time: '2012-12-20T02:58:45' }, { value: '187', type: 'cbg', time: '2012-12-20T03:03:45' }, { value: '188', type: 'cbg', time: '2012-12-20T03:08:45' } ] FOUND 9 records