vCardz

vCard processing that doesn't make your head hurt.

import { vCardEngine } from 'vcardz';

const payload = `
BEGIN:VCARD
VERSION:4.0
FN:Hello World
END:VCARD
`;
const engine = new vCardEngine(vcard_data);
const deck = [...engine.run()];
const card = deck[0];
console.log(`${card['FN'][0].value}`);

vCardz hello world

Features

• RFC-6350 compliant.
• Parse vCards into typed vCard objects.
• Output vCards from vCard objects.
• Parse vCards into JSON.
• Build vCards from JSON.
• Modify or create vCards programmatically using a simple API.
• Fast vCard deduplication based on the Swoosh entity resolution algorithm.

Installation

npm install vcardz --save

yarn add vcardz

Quick Reference

Full reference available at https://idaho-data.github.io/vcardz.ts/

Here's our johnDoe example vCard.

const JOHN_DOE_VCARD = 
`BEGIN:VCARD
VERSION:3.0
N:Doe;John;;;
FN;type=display:John Doe
FN;type=abbreviation:J Doe
ORG:Example.com Inc.;
TITLE:Imaginary test person
EMAIL;type=INTERNET;type=WORK;type=pref:[email protected]
TEL;type=WORK;type=pref:+1 617 555 1212
TEL;type=WORK:+1 (617) 555-1234
TEL;type=CELL:+1 781 555 1212
TEL;type=HOME:+1 202 555 1212
CATEGORIES:Test group,Work
X-ABUID:5AD380FD-B2DE-4261-BA99-DE1D1DB52FBE\\\\:ABPerson
item1.ADR;type=WORK:;;2 Enterprise Avenue;Worktown;NY;01111;USA
item1.X-ABADR:us
item2.ADR;type=HOME;type=pref:;;3 Acacia Avenue;Hoemtown;MA;02222;USA
item2.X-ABADR:us
NOTE:John Doe has a long and varied history\\, being documented on more police files that anyone else. Reports of his death are alas numerous.
item3.URL;type=pref:http\\://www.example.com/doe
item3.X-ABLabel:_$!<HomePage>!$_
item4.URL:http\\://www.example.com/Joe/foaf.df
item4.X-ABLabel:FOAF
item5.X-ABRELATEDNAMES;type=pref:Jane Doe
item5.X-ABLabel:_$!<Friend>!$_
END:VCARD`;

Reading

Read a single vCard:

const engine = new vCardEngine(JOHN_DOE_VCARD);
const card = engine.run().next().value;

Quickly read multiple vCards into an array:

const engine = new vCardEngine(`${JOHN_DOE_VCARD}\n${JOHN_DOE_VCARD}`);
const cards = [...engine.run()];

cards.length === 2

Read JSON data: use output from card.toJson() as input

const card = vCard.fromJson(...);

Writing

Write vCard data:

// both are equivalent
console.log(card.toString());
console.log(`${card}`);

Write JSON data:

console.log(card.toJson());

Fields

Access vCard fields using the same structure:

card['FN'][0].value === 'John Doe'
card['FN'][1].value === 'J Doe'
card['TITLE'][0].value === 'Imaginary test person';

note: vCard properties always return an array

ADR field

vCard's ADR field stores address components; the Address object provides additional helper properties:

card['ADR'][0].street === `2 Enterprise Avenue`
card['ADR'][0].city === 'Worktown'
card['ADR'][0].region === 'NY'
card['ADR'][0].postalCode === '011111'
card['ADR'][0].country === 'USA'

N field

vCard's N field stores name components; the Name object provides additional helper properties:

card['N'][0].first === 'John'
card['N'][0].last === 'Doe'

TEL field

the Phone object formats North American telephone numbers:

card['TEL'][0].value === '617-555-1212'

Tags

vCard tags, e.g. FN;TYPE=display, may contain attributes:

card['FN'][0].tag.attr === [{TYPE: ['display']}]

or a group, e.g. item1.ADR;TYPE=WORK

card['ADR'][0].tag.group === 'item1'

Deduplication

Deduplicates contacts using the following fields:

• FN - full name
• N - name components
• TEL - phone number
• EMAIL - email

vCardEngine.fscrub is customized using callbacks for:

• features - what vCard properties are used for matching
• matches - how vCard features are compared
• merging - how two matching vCards are combined

const payload = readFileSync('/path/to/duplicate-contacts.vcf', 'utf-8');
const engine = new vCardEngine(payload);
const scrubbed = engine.fscrub(engine.vcardFeatures.bind(engine),
                               engine.vcardMatch.bind(engine),
                               engine.vcardMerge.bind(engine));