Feat/add calendar delegation features

[GVodyanov]

For #2706

• Requires feat: add calendar delegation functionality server#59232

[codecov]

Codecov Report

❌ Patch coverage is 0% with 9 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
src/services/caldavService.js	0.00%	8 Missing and 1 partial ⚠️

📢 Thoughts on this report? Let us know!

[tcitworld]

This whole file should be moved to cdav-library.

[GVodyanov]

Here's what everything looks like

[kra-mo]

From the design side:

"Select a user" and "Search for a user…" are redundant, it's fine to just have the second if it's baked into the component anyway, so without the title. The input field should also be full-width, and Add should be a primary button.

I wonder why delegation should be its own item in the sidebar instead of just a section in Settings? I'd rather have it just there. And at that point, have + Add delegate be full-width as well.

[hamza221]

The pre-existing sharing logic doesn't work for delegation

A clear indication of Calendar "owner" should be visible

[GVodyanov]

From the design side:

"Select a user" and "Search for a user…" are redundant, it's fine to just have the second if it's baked into the component anyway, so without the title. The input field should also be full-width, and Add should be a primary button.

I wonder why delegation should be its own item in the sidebar instead of just a section in Settings? I'd rather have it just there. And at that point, have + Add delegate be full-width as well.

Thanks for the review! How does this look?

(I know that having delegates under delegation looks a little weird as title organization but that's the setting section with the form group component, and u can't not have titles for both)

[GVodyanov]

It took me a while to figure out but here is everything working

[GVodyanov]

You get the icon here to show its delegated

[kra-mo]

Looks good from the design side :)

[SebastianKrupinski]

Tested.

Found error when delegator has a shared calendar

{
  "reqId": "axdoc6W1q46YCrgBbdrq",
  "level": 0,
  "time": "2026-05-07T13:00:21+00:00",
  "remoteAddr": "127.0.0.1",
  "user": "user2",
  "app": "webdav",
  "method": "PROPFIND",
  "url": "/remote.php/dav/calendars/user1/",
  "scriptName": "/remote.php",
  "message": "Calendar with name 'company_shared_by_admin' could not be found",
  "userAgent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:150.0) Gecko/20100101 Firefox/150.0",
  "version": "34.0.0.3",
  "exception": {
    "Exception": "Sabre\\DAV\\Exception\\NotFound",
    "Message": "Calendar with name 'company_shared_by_admin' could not be found",
    "Code": 0,
    "Trace": [
      {
        "file": "/var/www/nextcloud/master/apps/dav/lib/Connector/Sabre/DavAclPlugin.php",
        "line": 86,
        "function": "checkPrivileges",
        "class": "OCA\\DAV\\Connector\\Sabre\\DavAclPlugin",
        "type": "->"
      },
      {
        "file": "/var/www/nextcloud/master/apps/dav/lib/Connector/Sabre/Server.php",
        "line": 163,
        "function": "propFind",
        "class": "OCA\\DAV\\Connector\\Sabre\\DavAclPlugin",
        "type": "->"
      },
      {
        "file": "/var/www/nextcloud/master/3rdparty/sabre/event/lib/WildcardEmitterTrait.php",
        "line": 89,
        "function": "OCA\\DAV\\Connector\\Sabre\\{closure}",
        "class": "OCA\\DAV\\Connector\\Sabre\\Server",
        "type": "->",
        "args": [
          "*** sensitive parameters replaced ***"
        ]
      },
      {
        "file": "/var/www/nextcloud/master/3rdparty/sabre/dav/lib/DAV/Server.php",
        "line": 1052,
        "function": "emit",
        "class": "Sabre\\DAV\\Server",
        "type": "->"
      },
      {
        "file": "/var/www/nextcloud/master/3rdparty/sabre/dav/lib/DAV/Server.php",
        "line": 984,
        "function": "getPropertiesByNode",
        "class": "Sabre\\DAV\\Server",
        "type": "->"
      },
      {
        "file": "/var/www/nextcloud/master/3rdparty/sabre/dav/lib/DAV/Server.php",
        "line": 1664,
        "function": "getPropertiesIteratorForPath",
        "class": "Sabre\\DAV\\Server",
        "type": "->"
      },
      {
        "file": "/var/www/nextcloud/master/3rdparty/sabre/dav/lib/DAV/Server.php",
        "line": 1649,
        "function": "writeMultiStatus",
        "class": "Sabre\\DAV\\Server",
        "type": "->"
      },
      {
        "file": "/var/www/nextcloud/master/3rdparty/sabre/dav/lib/DAV/CorePlugin.php",
        "line": 346,
        "function": "generateMultiStatus",
        "class": "Sabre\\DAV\\Server",
        "type": "->"
      },
      {
        "file": "/var/www/nextcloud/master/3rdparty/sabre/event/lib/WildcardEmitterTrait.php",
        "line": 89,
        "function": "httpPropFind",
        "class": "Sabre\\DAV\\CorePlugin",
        "type": "->"
      },
      {
        "file": "/var/www/nextcloud/master/3rdparty/sabre/dav/lib/DAV/Server.php",
        "line": 472,
        "function": "emit",
        "class": "Sabre\\DAV\\Server",
        "type": "->"
      },
      {
        "file": "/var/www/nextcloud/master/apps/dav/lib/Connector/Sabre/Server.php",
        "line": 215,
        "function": "invokeMethod",
        "class": "Sabre\\DAV\\Server",
        "type": "->"
      },
      {
        "file": "/var/www/nextcloud/master/apps/dav/lib/Server.php",
        "line": 430,
        "function": "start",
        "class": "OCA\\DAV\\Connector\\Sabre\\Server",
        "type": "->"
      },
      {
        "file": "/var/www/nextcloud/master/apps/dav/appinfo/v2/remote.php",
        "line": 25,
        "function": "exec",
        "class": "OCA\\DAV\\Server",
        "type": "->"
      },
      {
        "file": "/var/www/nextcloud/master/remote.php",
        "line": 152,
        "args": [
          "/var/www/nextcloud/master/apps/dav/appinfo/v2/remote.php"
        ],
        "function": "require_once"
      }
    ],
    "File": "/var/www/nextcloud/master/apps/dav/lib/Connector/Sabre/DavAclPlugin.php",
    "Line": 58,
    "message": "Calendar with name 'company_shared_by_admin' could not be found",
    "exception": "{\"class\":\"Sabre\\DAV\\Exception\\NotFound\",\"message\":\"Calendar with name 'company_shared_by_admin' could not be found\",\"code\":0,\"file\":\"/var/www/nextcloud/master/apps/dav/lib/Connector/Sabre/DavAclPlugin.php:58\",\"trace\":\"#0 /var/www/nextcloud/master/apps/dav/lib/Connector/Sabre/DavAclPlugin.php(86): OCA\\DAV\\Connector\\Sabre\\DavAclPlugin->checkPrivileges()\\n#1 /var/www/nextcloud/master/apps/dav/lib/Connector/Sabre/Server.php(163): OCA\\DAV\\Connector\\Sabre\\DavAclPlugin->propFind()\\n#2 /var/www/nextcloud/master/3rdparty/sabre/event/lib/WildcardEmitterTrait.php(89): OCA\\DAV\\Connector\\Sabre\\Server->OCA\\DAV\\Connector\\Sabre\\{closure}()\\n#3 /var/www/nextcloud/master/3rdparty/sabre/dav/lib/DAV/Server.php(1052): Sabre\\DAV\\Server->emit()\\n#4 /var/www/nextcloud/master/3rdparty/sabre/dav/lib/DAV/Server.php(984): Sabre\\DAV\\Server->getPropertiesByNode()\\n#5 /var/www/nextcloud/master/3rdparty/sabre/dav/lib/DAV/Server.php(1664): Sabre\\DAV\\Server->getPropertiesIteratorForPath()\\n#6 /var/www/nextcloud/master/3rdparty/sabre/dav/lib/DAV/Server.php(1649): Sabre\\DAV\\Server->writeMultiStatus()\\n#7 /var/www/nextcloud/master/3rdparty/sabre/dav/lib/DAV/CorePlugin.php(346): Sabre\\DAV\\Server->generateMultiStatus()\\n#8 /var/www/nextcloud/master/3rdparty/sabre/event/lib/WildcardEmitterTrait.php(89): Sabre\\DAV\\CorePlugin->httpPropFind()\\n#9 /var/www/nextcloud/master/3rdparty/sabre/dav/lib/DAV/Server.php(472): Sabre\\DAV\\Server->emit()\\n#10 /var/www/nextcloud/master/apps/dav/lib/Connector/Sabre/Server.php(215): Sabre\\DAV\\Server->invokeMethod()\\n#11 /var/www/nextcloud/master/apps/dav/lib/Server.php(430): OCA\\DAV\\Connector\\Sabre\\Server->start()\\n#12 /var/www/nextcloud/master/apps/dav/appinfo/v2/remote.php(25): OCA\\DAV\\Server->exec()\\n#13 /var/www/nextcloud/master/remote.php(152): require_once('...')\\n#14 {main}\"}",
    "CustomMessage": "Calendar with name 'company_shared_by_admin' could not be found"
  }
}