[horde] [turba] FBURL (freebusyUrl) field missing in vCard export and CardDAV

[Pulz, Joerg]

Hi,

i stumbled over a problem when exporting address book entries as vCard  
or synching those using CardDAV.
The address book in question is LDAP based.
As the LDAP entries do not contain an attribute holding the  
freebusyUrl, i construct this field in backends.local.php:

$cfgSources['localldap']['map']['freebusyUrl'] = array(
         'fields' => array('username'),
         'format' => Horde::url($GLOBALS['registry']->get('webroot',  
'kronolith') . '/fb.php', true, -1) . '?u=%s
);

This is working fine as long as i use the WebUI, the freebusyUrl field  
contains a valid URL and i can even use it in kronolith.

When i try to export the address book as vCard or try to sync using  
CardDAV there is no FBURL field in the .vcf file at all, so it seems  
the information is getting lost somewhere on the road when generating  
the vCard file(s).

I started to dig in the code to see where it happens and it seems to  
be related to my manual construction of the freebusyUrl in  
backends.local.php.

If i change this to a valid (any) LDAP attribute e.g.:

$cfgSources['localldap']['map']['freebusyUrl'] = 'dn';

then the FBURL field is in the vCard file containing the exact the  
value of the LDAP attribute.
So it seems that during generation of vCard file(s) only values  
directly returned by the backend are honored and others are simply  
ignored.

Just before line 547 in turbo/lib/Application.php

                 foreach ($results as $ob) {
                     if ($vcard) {
                         $data[] = $driver->tovCard($ob, $version, null, true);

the object contains all data e.g.:

       ["freebusyUrl"]=>
       array(2) {
         ["fields"]=>
         array(1) {
           [0]=>
           string(8) "username"
         }
         ["format"]=>
         string(48) "https://server.domain.tld/kronolith/fb.php?u=%s"
       }

but "freebusyUrl" is missing in $fields e.g.:

     ["fields"]=>
     array(24) {
       ["__key"]=>
       string(2) "dn"
       ["__uid"]=>
       string(3) "uid"
       ["name"]=>
       string(2) "cn"
       ["email"]=>
       string(4) "mail"
       ["homePhone"]=>
       string(9) "homephone"
       ["workPhone"]=>
       string(15) "telephonenumber"
       ["cellPhone"]=>
       string(21) "mobiletelephonenumber"
       ["homeAddress"]=>
       string(17) "homepostaladdress"
       ["firstname"]=>
       string(9) "givenName"
       ["lastname"]=>
       string(2) "sn"
       ["username"]=>
       string(3) "uid"
       ["uidnumber"]=>
       string(9) "uidNumber"
       ["gidnumber"]=>
       string(9) "gidNumber"
       ["gecos"]=>
       string(5) "gecos"
       ["homedirectory"]=>
       string(13) "homeDirectory"
       ["loginshell"]=>
       string(10) "loginShell"
       ["fax"]=>
       string(24) "facsimileTelephoneNumber"
       ["pager"]=>
       string(5) "pager"
       ["workRoom"]=>
       string(10) "roomNumber"
       ["department"]=>
       string(16) "departmentNumber"
       ["company"]=>
       string(2) "ou"
       ["workStreet"]=>
       string(13) "postalAddress"
       ["workCity"]=>
       string(10) "postalCode"
       ["workCountry"]=>
       string(2) "st"
     }

As $fields is honored by turba's "tovCard" the freebusyUrl information  
get's lost there.

Is there a chance to change the code that self constructed values are  
honored during vCard generation instead of only using attribute values  
returned by the LDAP backend itself? This would be really helpful as  
modifying the complete LDAP directory to add a real attribute that  
holds the freebusyUrl is not an option.

Kind regards
Joerg
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