implement principal property search for calendar user address set property

[georgehrke]

fixes #12033

This will extend FreeBusy support for KDE-PIM and Evolution.

Before:

curl -XREPORT -H "Authorization: Basic YWRtaW46YWRtaW4=" -H "Depth:0" -d '<principal-property-search xmlns="DAV:" xmlns:c="urn:ietf:params:xml:ns:caldav">     curl -XREPORT -H "Authorization: Basic YWRtaW46YWRtaW4=" -H "Depth:0" -d '<principal-property-search xmlns="DAV:" xmlns:c="urn:ietf:params:xml:ns:caldav">
  <apply-to-principal-collection-set />
  <property-search>
    <prop>
      <c:calendar-user-address-set />
    </prop>
    <match>foo3@ehrke.email</match>
  </property-search>
  <prop>
    <displayname />
  </prop>
</principal-property-search>' 'http://nextcloud.local/remote.php/dav/calendars/admin/personal'

<?xml version="1.0"?>
<d:multistatus xmlns:d="DAV:" xmlns:s="http://sabredav.org/ns" xmlns:cal="urn:ietf:params:xml:ns:caldav" xmlns:cs="http://calendarserver.org/ns/" xmlns:oc="http://owncloud.org/ns" xmlns:nc="http://nextcloud.org/ns"/>%

after:

curl -XREPORT -H "Authorization: Basic YWRtaW46YWRtaW4=" -H "Depth:0" -d '<principal-property-search xmlns="DAV:" xmlns:c="urn:ietf:params:xml:ns:caldav">
  <apply-to-principal-collection-set />
  <property-search>
    <prop>
      <c:calendar-user-address-set />
    </prop>
    <match>foo3@ehrke.email</match>
  </property-search>
  <prop>
    <displayname />
  </prop>
</principal-property-search>' 'http://nextcloud.local/remote.php/dav/calendars/admin/personal'

<?xml version="1.0"?>
<d:multistatus xmlns:d="DAV:" xmlns:s="http://sabredav.org/ns" xmlns:cal="urn:ietf:params:xml:ns:caldav" xmlns:cs="http://calendarserver.org/ns/" xmlns:oc="http://owncloud.org/ns" xmlns:nc="http://nextcloud.org/ns">
<d:response>
    <d:href>/remote.php/dav/principals/users/user2/</d:href>
    <d:propstat>
        <d:prop>
            <d:displayname>Umberto</d:displayname>
        </d:prop>
        <d:status>HTTP/1.1 200 OK</d:status>
    </d:propstat>
</d:response>
</d:multistatus>%

@schiessle

[schiessle]

I just tried it with Evolution but I don't see any free/busy information.

There are two requests when I ask Evolution to update the free/busy information:

First request:

Request

Response

Second request

Request

Response

That's what I have in the nextcoud.log:

{"reqId":"M2q5qBrYBjtIRLOyxnXw","level":4,"time":"2019-02-21T12:43:50+00:00","remoteAddr":"127.0.0.1","user":"user1","app":"webdav","method":"REPORT","url":"\/server\/remote.php\/dav\/principals\/users\/admin\/","message":{"Exception":"Sabre\\VObject\\InvalidDataException","Message":"The supplied iCalendar datetime value is incorrect: 2019-02-14T23:00:00Z","Code":0,"Trace":[{"file":"\/home\/schiesbn\/Repos\/nextcloud\/server\/3rdparty\/sabre\/dav\/lib\/CalDAV\/Xml\/Request\/FreeBusyQueryReport.php","line":78,"function":"parseDateTime","class":"Sabre\\VObject\\DateTimeParser","type":"::","args":["2019-02-14T23:00:00Z"]},{"function":"xmlDeserialize","class":"Sabre\\CalDAV\\Xml\\Request\\FreeBusyQueryReport","type":"::","args":[{"elementMap":{"{DAV:}multistatus":"Sabre\\DAV\\Xml\\Response\\MultiStatus","{DAV:}response":"Sabre\\DAV\\Xml\\Element\\Response","{DAV:}propfind":"Sabre\\DAV\\Xml\\Request\\PropFind","{DAV:}propertyupdate":"Sabre\\DAV\\Xml\\Request\\PropPatch","{DAV:}mkcol":"Sabre\\DAV\\Xml\\Request\\MkCol","{DAV:}resourcetype":"Sabre\\DAV\\Xml\\Property\\ResourceType","{DAV:}sync-collection":"Sabre\\DAV\\Xml\\Request\\SyncCollectionReport","{DAV:}group-member-set":"Sabre\\DAV\\Xml\\Property\\Href","{DAV:}acl":"Sabre\\DAVACL\\Xml\\Property\\Acl","{DAV:}acl-principal-prop-set":"Sabre\\DAVACL\\Xml\\Request\\AclPrincipalPropSetReport","{DAV:}expand-property":"Sabre\\DAVACL\\Xml\\Request\\ExpandPropertyReport","{DAV:}principal-property-search":"Sabre\\DAVACL\\Xml\\Request\\PrincipalPropertySearchReport","{DAV:}principal-search-property-set":"Sabre\\DAVACL\\Xml\\Request\\PrincipalSearchPropertySetReport","{DAV:}principal-match":"Sabre\\DAVACL\\Xml\\Request\\PrincipalMatchReport","{urn:ietf:params:xml:ns:caldav}supported-calendar-component-set":"Sabre\\CalDAV\\Xml\\Property\\SupportedCalendarComponentSet","{urn:ietf:params:xml:ns:caldav}calendar-query":"Sabre\\CalDAV\\Xml\\Request\\CalendarQueryReport","{urn:ietf:params:xml:ns:caldav}calendar-multiget":"Sabre\\CalDAV\\Xml\\Request\\CalendarMultiGetReport","{urn:ietf:params:xml:ns:caldav}free-busy-query":"Sabre\\CalDAV\\Xml\\Request\\FreeBusyQueryReport","{urn:ietf:params:xml:ns:caldav}mkcalendar":"Sabre\\CalDAV\\Xml\\Request\\MkCalendar","{urn:ietf:params:xml:ns:caldav}schedule-calendar-transp":"Sabre\\CalDAV\\Xml\\Property\\ScheduleCalendarTransp","{http:\/\/calendarserver.org\/ns\/}source":"Sabre\\DAV\\Xml\\Property\\Href","{http:\/\/owncloud.org\/ns}share":"OCA\\DAV\\DAV\\Sharing\\Xml\\ShareRequest","{http:\/\/owncloud.org\/ns}invite":"OCA\\DAV\\DAV\\Sharing\\Xml\\Invite","{urn:ietf:params:xml:ns:carddav}addressbook-query":"Sabre\\CardDAV\\Xml\\Request\\AddressBookQueryReport","{urn:ietf:params:xml:ns:carddav}addressbook-multiget":"Sabre\\CardDAV\\Xml\\Request\\AddressBookMultiGetReport","{http:\/\/calendarserver.org\/ns\/}me-card":"Sabre\\DAV\\Xml\\Property\\Href","{http:\/\/owncloud.org\/ns}tags":"OCA\\DAV\\Connector\\Sabre\\TagList","{http:\/\/owncloud.org\/ns}share-types":"OCA\\DAV\\Connector\\Sabre\\ShareTypeList","{http:\/\/nextcloud.com\/ns}calendar-search":"OCA\\DAV\\CalDAV\\Search\\Xml\\Request\\CalendarSearchReport"},"contextUri":"\/server\/remote.php\/dav\/principals\/users\/admin\/","namespaceMap":[],"classMap":[],"__class__":"Sabre\\Xml\\Reader"}]},{"file":"\/home\/schiesbn\/Repos\/nextcloud\/server\/3rdparty\/sabre\/xml\/lib\/Reader.php","line":246,"function":"call_user_func","args":[["Sabre\\CalDAV\\Xml\\Request\\FreeBusyQueryReport","xmlDeserialize"],{"elementMap":{"{DAV:}multistatus":"Sabre\\DAV\\Xml\\Response\\MultiStatus","{DAV:}response":"Sabre\\DAV\\Xml\\Element\\Response","{DAV:}propfind":"Sabre\\DAV\\Xml\\Request\\PropFind","{DAV:}propertyupdate":"Sabre\\DAV\\Xml\\Request\\PropPatch","{DAV:}mkcol":"Sabre\\DAV\\Xml\\Request\\MkCol","{DAV:}resourcetype":"Sabre\\DAV\\Xml\\Property\\ResourceType","{DAV:}sync-collection":"Sabre\\DAV\\Xml\\Request\\SyncCollectionReport","{DAV:}group-member-set":"Sabre\\DAV\\Xml\\Property\\Href","{DAV:}acl":"Sabre\\DAVACL\\Xml\\Property\\Acl","{DAV:}acl-principal-prop-set":"Sabre\\DAVACL\\Xml\\Request\\AclPrincipalPropSetReport","{DAV:}expand-property":"Sabre\\DAVACL\\Xml\\Request\\ExpandPropertyReport","{DAV:}principal-property-search":"Sabre\\DAVACL\\Xml\\Request\\PrincipalPropertySearchReport","{DAV:}principal-search-property-set":"Sabre\\DAVACL\\Xml\\Request\\PrincipalSearchPropertySetReport","{DAV:}principal-match":"Sabre\\DAVACL\\Xml\\Request\\PrincipalMatchReport","{urn:ietf:params:xml:ns:caldav}supported-calendar-component-set":"Sabre\\CalDAV\\Xml\\Property\\SupportedCalendarComponentSet","{urn:ietf:params:xml:ns:caldav}calendar-query":"Sabre\\CalDAV\\Xml\\Request\\CalendarQueryReport","{urn:ietf:params:xml:ns:caldav}calendar-multiget":"Sabre\\CalDAV\\Xml\\Request\\CalendarMultiGetReport","{urn:ietf:params:xml:ns:caldav}free-busy-query":"Sabre\\CalDAV\\Xml\\Request\\FreeBusyQueryReport","{urn:ietf:params:xml:ns:caldav}mkcalendar":"Sabre\\CalDAV\\Xml\\Request\\MkCalendar","{urn:ietf:params:xml:ns:caldav}schedule-calendar-transp":"Sabre\\CalDAV\\Xml\\Property\\ScheduleCalendarTransp","{http:\/\/calendarserver.org\/ns\/}source":"Sabre\\DAV\\Xml\\Property\\Href","{http:\/\/owncloud.org\/ns}share":"OCA\\DAV\\DAV\\Sharing\\Xml\\ShareRequest","{http:\/\/owncloud.org\/ns}invite":"OCA\\DAV\\DAV\\Sharing\\Xml\\Invite","{urn:ietf:params:xml:ns:carddav}addressbook-query":"Sabre\\CardDAV\\Xml\\Request\\AddressBookQueryReport","{urn:ietf:params:xml:ns:carddav}addressbook-multiget":"Sabre\\CardDAV\\Xml\\Request\\AddressBookMultiGetReport","{http:\/\/calendarserver.org\/ns\/}me-card":"Sabre\\DAV\\Xml\\Property\\Href","{http:\/\/owncloud.org\/ns}tags":"OCA\\DAV\\Connector\\Sabre\\TagList","{http:\/\/owncloud.org\/ns}share-types":"OCA\\DAV\\Connector\\Sabre\\ShareTypeList","{http:\/\/nextcloud.com\/ns}calendar-search":"OCA\\DAV\\CalDAV\\Search\\Xml\\Request\\CalendarSearchReport"},"contextUri":"\/server\/remote.php\/dav\/principals\/users\/admin\/","namespaceMap":[],"classMap":[],"__class__":"Sabre\\Xml\\Reader"}]},{"file":"\/home\/schiesbn\/Repos\/nextcloud\/server\/3rdparty\/sabre\/xml\/lib\/Reader.php","line":71,"function":"parseCurrentElement","class":"Sabre\\Xml\\Reader","type":"->","args":[]},{"file":"\/home\/schiesbn\/Repos\/nextcloud\/server\/3rdparty\/sabre\/xml\/lib\/Service.php","line":118,"function":"parse","class":"Sabre\\Xml\\Reader","type":"->","args":[]},{"file":"\/home\/schiesbn\/Repos\/nextcloud\/server\/3rdparty\/sabre\/dav\/lib\/DAV\/CorePlugin.php","line":713,"function":"parse","class":"Sabre\\Xml\\Service","type":"->","args":["<free-busy-query xmlns=\"urn:ietf:params:xml:ns:caldav\">\n  <time-range start=\"2019-02-14T23:00:00Z\" end=\"2019-03-21T23:00:00Z\"\/>\n<\/free-busy-query>","\/server\/remote.php\/dav\/principals\/users\/admin\/",null]},{"function":"httpReport","class":"Sabre\\DAV\\CorePlugin","type":"->","args":[{"absoluteUrl":"http:\/\/localhost\/server\/remote.php\/dav\/principals\/users\/admin\/","__class__":"Sabre\\HTTP\\Request"},{"__class__":"Sabre\\HTTP\\Response"}]},{"file":"\/home\/schiesbn\/Repos\/nextcloud\/server\/3rdparty\/sabre\/event\/lib\/EventEmitterTrait.php","line":105,"function":"call_user_func_array","args":[[{"__class__":"Sabre\\DAV\\CorePlugin"},"httpReport"],[{"absoluteUrl":"http:\/\/localhost\/server\/remote.php\/dav\/principals\/users\/admin\/","__class__":"Sabre\\HTTP\\Request"},{"__class__":"Sabre\\HTTP\\Response"}]]},{"file":"\/home\/schiesbn\/Repos\/nextcloud\/server\/3rdparty\/sabre\/dav\/lib\/DAV\/Server.php","line":479,"function":"emit","class":"Sabre\\Event\\EventEmitter","type":"->","args":["method:REPORT",[{"absoluteUrl":"http:\/\/localhost\/server\/remote.php\/dav\/principals\/users\/admin\/","__class__":"Sabre\\HTTP\\Request"},{"__class__":"Sabre\\HTTP\\Response"}]]},{"file":"\/home\/schiesbn\/Repos\/nextcloud\/server\/3rdparty\/sabre\/dav\/lib\/DAV\/Server.php","line":254,"function":"invokeMethod","class":"Sabre\\DAV\\Server","type":"->","args":[{"absoluteUrl":"http:\/\/localhost\/server\/remote.php\/dav\/principals\/users\/admin\/","__class__":"Sabre\\HTTP\\Request"},{"__class__":"Sabre\\HTTP\\Response"}]},{"file":"\/home\/schiesbn\/Repos\/nextcloud\/server\/apps\/dav\/lib\/Server.php","line":313,"function":"exec","class":"Sabre\\DAV\\Server","type":"->","args":[]},{"file":"\/home\/schiesbn\/Repos\/nextcloud\/server\/apps\/dav\/appinfo\/v2\/remote.php","line":35,"function":"exec","class":"OCA\\DAV\\Server","type":"->","args":[]},{"file":"\/home\/schiesbn\/Repos\/nextcloud\/server\/remote.php","line":163,"args":["\/home\/schiesbn\/Repos\/nextcloud\/server\/apps\/dav\/appinfo\/v2\/remote.php"],"function":"require_once"}],"File":"\/home\/schiesbn\/Repos\/nextcloud\/server\/3rdparty\/sabre\/vobject\/lib\/DateTimeParser.php","Line":40,"CustomMessage":"--"},"userAgent":"Evolution\/3.30.5","version":"16.0.0.0"}

[georgehrke]

@schiessle Can you please report that as a bug to Evolution?

To be fair, Sabre/DAV is very strict here, but it got every right to do so:
https://tools.ietf.org/html/rfc4791#section-7.10.1

time-range requires a iCalendar formatted date-time string in UTC, see definition https://tools.ietf.org/html/rfc4791#section-9.9

iCalendar is YYYYMMDDTHHMMSSZ, not YYYY-MM-DDTHH:MM:SSZ

2019-02-14T23:00:00Z should be 20190214T230000Z

[schiessle]

Sure, I will forward it.

[schiessle]

For reference, this is the Evolution ticket: https://gitlab.gnome.org/GNOME/evolution/issues/316

[schiessle]

Unfortunately I can't test it because of a Evolution bug (which is already fixed thanks to the awesome Gnome team, I just wait for the release and that the update lands in Debian). But code looks good, so I'm fine with merging it.

[schiessle]

maybe a KDE user like @tobiasKaminsky could give it a try with Kontact?

[tobiasKaminsky]

I can give it a try, though I do not use Kontact.

[tobiasKaminsky]

Hm. I do not get what I should test…
Can you give me a hint? (also on IRC if you want)

[schiessle]

@tobiasKaminsky You create two users (user1 and user2). Create calendar entry for user2, connect the calendar of user1 to KDE Kontact. Setup an event/appointment in the calendar at the same date you created already an entry for user2 and add user2 as participant. Kontacts should have a free/busy few where you can see if user2 has time at the date or not, he should be show as busy.

[tobiasKaminsky]

Either I did something wrong or it is not working:
"Participants: schedule" is greyed out

[MorrisJobke]

@georgehrke 🏓

[georgehrke]

@tobiasKaminsky Can you select a Meeting organiser?

@MorrisJobke Even if KOrganiser doesn't work at the moment, it didn't work before either. As @schiessle confirmed, this adds support for Evolution, so we should get this in now imho.

[tobiasKaminsky]

@tobiasKaminsky Can you select a Meeting organiser?

Does not seem that good…
To be honest, I am not 100% if I am doing it right:

• I switched to your branch
• added NC via KOganizer
• create an event

In settings I also see:

[MorrisJobke]

Moved to 17 - in case it fixes issues we still can backport it.

[georgehrke]

@MorrisJobke I think we should get this in now.
This pull-request does exactly what the related ticket is about: #12033

It implements support for a principal-property-search based on the calendar-user-address-set.
This adds FreeBusy support for Evolution. If KDE PIM requires yet another API to query free-busy data, that should be addressed in a separate PR.

[MorrisJobke]

Fine with me then 👍

[MorrisJobke]

Rebased to retrigger CI.

[tobiasKaminsky]

@georgehrke also fine by me.
You can always ping me if I shall test something.

[MorrisJobke]

CI: https://drone.nextcloud.com/nextcloud/server/17226

[CarliJoy]

If KDE PIM requires yet another API to query free-busy data, that should be addressed in a separate PR.

Was this PR created? I can't find anythin searching.

The related help entry doesn't get me any further as well.

I am unsure if I should create another issue or rather look into KDE PIM configuration options...