Support Mac groups vCards

[nalt]

Steps to reproduce

1. Setup CardDAV Sync in MacOS
2. Create a group in MacOS Contact app

or

1. Create a group in Nextcloud

Expected behaviour

Groups created in Contacts app should appear as groups in Nextcloud.
Groups created in Nextcloud should appear as groups in Contacts app.

Actual behaviour

A group created in Contacts app appears as a normal contact in Nextcloud.
Nextcloud groups are not represented in Contacts app.

Server configuration

Operating system: Nextcloud official Docker

Web server: Nginx Proxy

Database: MariaDB

Nextcloud version: 11.0.3

Contacts version: 1.5.3

Updated from an older Nextcloud or fresh install: Updated, but contacts cleared

Client configuration

Operating system: MacOS 10.12.4

CardDAV-clients: MacOS Contacts app

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[EddyLB]

Same issue with Nextcloud 12

Server configuration

Operating system: Debian GNU/Linux 8.8 (jessie) x86_64

Web server: Apache/2.4.10 (Debian) (apache2handler)

Database: mysql 5.5.55

PHP version: 5.6.30-0+deb8u1
Modules loaded: Core, date, ereg, libxml, openssl, pcre, zlib, bcmath, bz2, calendar, ctype, dba, dom, hash, fileinfo, filter, ftp, gettext, SPL, iconv, mbstring, session, posix, Reflection, standard, shmop, SimpleXML, soap, sockets, Phar, exif, sysvmsg, sysvsem, sysvshm, tokenizer, wddx, xml, xmlreader, xmlwriter, zip, apache2handler, PDO, apcu, curl, gd, imagick, intl, json, mcrypt, memcache, mysql, mysqli, pdo_mysql, pdo_sqlite, pspell, readline, recode, sqlite3, tidy, xmlrpc, xsl, mhash, apc, Zend OPcache

Nextcloud version: 12.0.0 - 12.0.0.29

Are you using external storage, if yes which one: files_external is disabled

Are you using encryption: no

Are you using an external user-backend, if yes which one: LDAP/ActiveDirectory/Webdav/...

Client configuration

Browser: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/603.3.1 (KHTML, like Gecko) Version/10.1.2 Safari/603.3.1

Operating system:

• macOS Sierra version 10.12.6 Beta (16G8c) and Contacts version 10.0 (1756.20)
• iOS 10.3.3 (14G5037b)

Updated from an older Nextcloud/ownCloud or fresh install:
Updated from last release of NextCloud 11

List of activated apps:

App list

``` Enabled: - activity: 2.5.2 - bruteforcesettings: 1.0.2 - calendar: 1.5.3 - comments: 1.2.0 - contacts: 1.5.3 - dav: 1.3.0 - federatedfilesharing: 1.2.0 - federation: 1.2.0 - files: 1.7.2 - files_pdfviewer: 1.1.1 - files_sharing: 1.4.0 - files_texteditor: 2.4.1 - files_trashbin: 1.2.0 - files_versions: 1.5.0 - files_videoplayer: 1.1.0 - firstrunwizard: 2.1 - issuetemplate: 0.2.1 - logreader: 2.0.0 - lookup_server_connector: 1.0.0 - nextcloud_announcements: 1.1 - notifications: 2.0.0 - oauth2: 1.0.5 - password_policy: 1.2.2 - provisioning_api: 1.2.0 - serverinfo: 1.2.0 - sharebymail: 1.2.0 - survey_client: 1.0.0 - systemtags: 1.2.0 - theming: 1.3.0 - twofactor_backupcodes: 1.1.1 - updatenotification: 1.2.0 - workflowengine: 1.2.0

Disabled:

• admin_audit
• encryption
• files_external
• gallery
• user_external
• user_ldap

</details>

[skjnldsv]

Could you create a new contact on your Mac and sync it to nextcloud, then export it from nextcloud and post the result here please.

[irgendwie]

Afaik MacOS (and/or Apple in general) stores groups as vcards and not as property in a vcard, like we do it in the contacts app. When configuring davDroid (for Android) you can choose between those two options, I'm not sure if this is also possible for apple products.

[skjnldsv]

If we want to implement this, this won't be a priority then :/

[EddyLB]

Hi @skjnldsv,
I've created a group "macOS" and a contact in that group. As expected, mac OS Contacts creates 2 cards:

• one declaring the group with X-ADDRESSBOOKSERVER-KIND:group
  and the ID X-ADDRESSBOOKSERVER-MEMBER:urn:uuid:8a3da972-8df0-4e5a-a572-bdd4621abc39. Apple uses X-ADDRESSBOOKSERVER-KIND instead of KIND, which is to my understanding acceptable according to RFC 6350.

• one declaring the contact and attaching the card to the group using the ID with UID:8a3da972-8df0-4e5a-a572-bdd4621abc39

After syncing with Nextcloud, I get two non-grouped new cards (attached). It would really be great that the Nextcloud Contacts app accepts X-ADDRESSBOOKSERVER-KIND as well as KIND for identifying vCard representing a group of persons or entities.

Group macOS.vcf.txt
Contact In macOS Group.vcf.txt

[skjnldsv]

Isn't there an option to change this behavior on Mac?

[EddyLB]

On macOS 10.12, the user can choose between the vCard formats 2.1 and 3.0 (and the vCard encoding format for 2.1). He/she can also enable/disable the export of notes and photos in vCards and the use of a private me card.

As shown for example here, the property KIND is not supported in 3.0 (only in 4.0).

[nalt]

MacOS does not have option to change how the vCard are synced. Even if there was a hack via some config file, this would not be user-friendly at all. Their solution corresponds to the KIND/MEMBER fields of vCard 4.0, without breaking the older standards. So the logic is the same as in the 4.0 standard.

How does Nextcloud store groups - as a name in the Categories field? What would happen, if a vCard 4.0 using the standardized KIND/MEMBER fields is sent?

I would assume the version option exposed to the user only affects the export functionality.

[aluxnimm]

We support iCloud contact groups with X-ADDRESSBOOKSERVER-KIND:group also now for mapping Outlook Distribution Lists to contact groups in OutlookCalDavSynchronizer

So would be really useful if the contact app could show the members of the group for a better Nextcloud and Outlook integration! Now the group is only visible as a normal contact with the name of the group and no members but atleast can be synced back to (another) Outlook or macOS instance.