Add support for vCard 4.0

[da4089]

IETF RFC-6350 documents the vCard 4.0 format.

vObject should be extended to support both creation and parsing of VCARDs in 4.0 format, while maintaining compatibility with vCard v3.0 and v2.1.

See also

• vCard 4.0 skarim/vobject#106
• Radicale fails when uploading a photo in a vcard Kozea/Radicale#969

[Lxtharia]

Most exited about this one, because that's the only thing that is missing for me in Radicale.
Tried a lot of different CardDAV Servers, just for their v4.0 support, but they never really suited my needs.

Thanks for your work on this project!

[mattdale77]

I would also like to see this. V4 specification is over 10 years old. Android creates V4 vCards so trying to interact with them or the same addressbooks is not optimal and at best can create a mixed version address book

[da4089]

@mattdale77 do you have some example cards from an Android phone we can use for testing? Ideally, a person card and a company card, both with a bunch of the properties filled out?

[mattdale77]

@mattdale77 do you have some example cards from an Android phone we can use for testing? Ideally, a person card and a company card, both with a bunch of the properties filled out?

The following created on Android 14 in an Etesync addressbook and extracted using the etebase library for Python. They have differing number of attributes filled in. One is a label I created or it may be referred to as a group in some places. It is represented by another vCard. Please let me know if I can do anything further.

BEGIN:VCARD
VERSION:4.0
PRODID:-//EteSync//com.etesync.syncadapter/2.4.0 ez-vcard/0.11.2
UID:15176461-89f8-4158-ac27-73865b3ba979
FN:Test Testy
N:Testy;Test;;;
TEL;TYPE=cell:07123 123123
TEL;TYPE=home:07333 333336
NOTE:This is the notes field
REV:20240429T002524Z
END:VCARD

---

BEGIN:VCARD
VERSION:4.0
PRODID:-//EteSync//com.etesync.syncadapter/2.4.0 ez-vcard/0.11.2
UID:e47b1867-a0c6-4c09-b524-9a62b2bab208
FN:Mr John Middle Smith, PhD
N:Smith;John;Middle;Mr;PhD
ORG:Some Company
TEL;TYPE=cell:+11115551236
TEL;TYPE=home:+1 222-555-4654
EMAIL;TYPE=home:home@myemail.com
EMAIL;TYPE=work:work@myemail.com
ADR;TYPE=home;LABEL="55 My Street\nSpringfield , Some County 55555\nUS":;;5
5 My Street;Springfield ;Some County;55555;US
ADR;TYPE=work;LABEL="66 Another Street\nAnother City, A County 66666\nUS":;
;66 Another Street;Another City;A County;66666;US
NOTE:Notes about the contact
URL:http://www.mywebsite.com
BDAY:20000430
RELATED;TYPE=co-worker;VALUE=text:Related Person
RELATED;TYPE=friend;VALUE=text:Another Related Person
REV:20240430T205447Z
END:VCARD

---

BEGIN:VCARD
VERSION:4.0
PRODID:-//EteSync//com.etesync.syncadapter/2.4.0 ez-vcard/0.11.2
UID:61ec9008-300d-4398-b2eb-0cb00d88d79c
KIND:group
MEMBER:urn:uuid:15176461-89f8-4158-ac27-73865b3ba979
MEMBER:urn:uuid:e47b1867-a0c6-4c09-b524-9a62b2bab208
FN:custom
REV:20240430T205615Z
END:VCARD

---

BEGIN:VCARD
VERSION:4.0
PRODID:-//EteSync//com.etesync.syncadapter/2.4.0 ez-vcard/0.11.2
UID:a99cc7ab-27d4-4636-ac3a-b50cb771dcdd
FN:Some Company
ORG:Some Company
TEL:+44 1234 123123
EMAIL;TYPE=home:sales@acompany.com
NOTE:Notes about company
URL:http://www.acompany.com
REV:20240430T205947Z
END:VCARD