A GDSN service library for Node.js.
Provides useful utilities for data pools and trading parties.
Get the latest published release from npm:
npm install gdsn
- should be 13 digits
- may contain leading zeroes (it's a string, not a number)
- the last digit is a check digit
var Gdsn = require('gdsn')
var gdsn = new Gdsn()
var gln = '1100001011483'
var isValid = gdsn.validateGln(gln) // return [true|false]
console.log('GLN ' + gln + ' is ' + (isValid ? 'valid' : 'invalid'))- should be 14 digits
- may contain leading zeroes (it's a string, not a number)
- the last digit is a check digit
var Gdsn = require('gdsn')
var gdsn = new Gdsn()
var gtin = '00749384988152'
var isValid = gdsn.validateGtin(gtin) // return [true|false]
console.log('GTIN ' + gtin + ' is ' + (isValid ? 'valid' : 'invalid'))- large CIN files may be 10+ MB and contain hundreds of items
- this approach uses a callback to pass the complete array of items after the parsing has ended
var Gdsn = require('gdsn')
var gdsn = new Gdsn()
gdsn.items.getTradeItemsFromFile(cinFile, function(err, items) {
if (err) throw err
for (i in items) {
var item = items[i]
console.log('Found item with GTIN ' + item.gtin + ', extracted from message ' + item.msg_id)
}
console.log('item count: ' + items.length)
})- this approach lets your callback work with each trade item as it is read
- the first trade item will not be passed until the dataRecipient has been read from the stream
var fs = require('fs')
var Gdsn = require('gdsn')
var gdsn = new Gdsn()
var readable = fs.createReadStream(cinFile, {encoding: 'utf8'})
var items = []
gdsn.items.getEachTradeItemFromStream(readable, function (err, item) {
if (err) throw err
if (item) {
console.log('Found item with GTIN ' + item.gtin + ', extracted from message ' + item.msg_id)
items.push(item)
}
else {
// all done
console.log('item count: ' + items.length)
}
})Clone the latest DEV release from GH:
git clone [email protected]:theoxylo/node-gdsn.git
To run some quick tests:
cd node-gdsn
npm update
npm test
Submit a pull request to contribute!
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