After organizer moves event, attendee status is still "accepted", should be "needs-action"

[igorr-stc]

Steps to reproduce

1. Organizer creates an event, adds attendees to the event
2. Attendee accepts event (PARTSTAT=ACCEPTED)
3. Organizer moves event to different time
4. In attendees calendar event is moved too but is still accepted by attendee

Expected behaviour

Attendee status should change to "needs-action" (PARTSTAT=NEEDS-ACTION), because attendee may be not very happy about time change.
And if he gets a lot of calendar emails he can just miss notification.

Actual behaviour

Event is moved in other participants calendars and their status is not changed (still ACCEPTED or DECLINED)

Server configuration

Nextcloud version:
14.0.3

Where did you install Nextcloud from:

Signing status:

Signing status

No errors have been found.

List of activated apps:

App list

Enabled:
  - accessibility: 1.0.1
  - activity: 2.7.0
  - calendar: 1.6.3
  - cloud_federation_api: 0.0.1
  - comments: 1.4.0
  - contacts: 2.1.7
  - dav: 1.6.0
  - federatedfilesharing: 1.4.0
  - federation: 1.4.0
  - files: 1.9.0
  - files_accesscontrol: 1.4.0
  - files_markdown: 2.0.5
  - files_pdfviewer: 1.3.2
  - files_sharing: 1.6.2
  - files_texteditor: 2.6.0
  - files_trashbin: 1.4.1
  - files_versions: 1.7.1
  - files_videoplayer: 1.3.0
  - impersonate: 1.1.0
  - logreader: 2.0.0
  - lookup_server_connector: 1.2.0
  - mail: 0.11.0
  - nextcloud_announcements: 1.3.0
  - notes: 2.5.0
  - notifications: 2.2.1
  - oauth2: 1.2.1
  - password_policy: 1.4.0
  - provisioning_api: 1.4.0
  - richdocuments: 3.0.5
  - serverinfo: 1.4.0
  - sharebymail: 1.4.0
  - support: 1.0.0
  - systemtags: 1.4.0
  - tasks: 0.9.7
  - theming: 1.5.0
  - twofactor_backupcodes: 1.3.1
  - user_ldap: 1.4.0
  - workflowengine: 1.4.0
Disabled:
  - admin_audit
  - encryption
  - files_external
  - firstrunwizard
  - gallery
  - spreed
  - survey_client
  - updatenotification
  - user_external

Nextcloud configuration:

Config report

{
    "system": {
        "instanceid": "***REMOVED SENSITIVE VALUE***",
        "passwordsalt": "***REMOVED SENSITIVE VALUE***",
        "trusted_domains": [
            "***REMOVED SENSITIVE VALUE***"
        ],
        "datadirectory": "***REMOVED SENSITIVE VALUE***",
        "version": "14.0.3.0",
        "dbtype": "mysql",
        "dbname": "***REMOVED SENSITIVE VALUE***",
        "dbhost": "***REMOVED SENSITIVE VALUE***",
        "dbuser": "***REMOVED SENSITIVE VALUE***",
        "dbpassword": "***REMOVED SENSITIVE VALUE***",
        "dbtableprefix": "oc_",
        "installed": true,
        "default_language": "ru",
        "defaultapp": "files",
        "knowledgebaseenabled": false,
        "allow_user_to_change_display_name": false,
        "remember_login_cookie_lifetime": 1296000,
        "session_lifetime": 86400,
        "session_keepalive": true,
        "token_auth_enforced": false,
        "auth.bruteforce.protection.enabled": true,
        "lost_password_link": "disabled",
        "mail_domain": "***REMOVED SENSITIVE VALUE***",
        "mail_from_address": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpdebug": false,
        "mail_smtpmode": "smtp",
        "mail_smtphost": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpport": "25",
        "mail_smtptimeout": 10,
        "overwrite.cli.url": "***REMOVED SENSITIVE VALUE***",
        "htaccess.RewriteBase": "\/",
        "htaccess.IgnoreFrontController": true,
        "proxy": "",
        "proxyuserpwd": "***REMOVED SENSITIVE VALUE***",
        "trashbin_retention_obligation": "auto",
        "versions_retention_obligation": "auto",
        "appcodechecker": true,
        "updatechecker": false,
        "updater.server.url": "https:\/\/updates.nextcloud.com\/updater_server\/",
        "updater.release.channel": "stable",
        "has_internet_connection": true,
        "check_for_working_webdav": true,
        "check_for_working_wellknown_setup": true,
        "check_for_working_htaccess": true,
        "check_data_directory_permissions": true,
        "config_is_read_only": false,
        "log_type": "syslog",
        "logfile": "",
        "loglevel": 2,
        "syslog_tag": "nextcloud",
        "logdateformat": "F d, Y H:i:s",
        "logtimezone": "Europe\/Moscow",
        "log_query": false,
        "log_rotate_size": false,
        "customclient_desktop": "https:\/\/nextcloud.com\/install\/#install-clients",
        "customclient_android": "https:\/\/play.google.com\/store\/apps\/details?id=com.nextcloud.client",
        "customclient_ios": "https:\/\/itunes.apple.com\/us\/app\/nextcloud\/id1125420102?mt=8",
        "appstoreenabled": true,
        "apps_paths": [
            {
                "path": "\/usr\/local\/www\/nextcloud\/apps",
                "url": "\/apps",
                "writable": true
            },
            {
                "path": "\/usr\/local\/www\/nextcloud\/apps-pkg",
                "url": "\/apps-pkg",
                "writable": false
            }
        ],
        "enable_previews": true,
        "preview_max_x": 4096,
        "preview_max_y": 4096,
        "preview_max_filesize_image": 50,
        "preview_libreoffice_path": "",
        "preview_office_cl_parameters": " --headless --nologo --nofirststartwizard --invisible --norestore --convert-to pdf --outdir ",
        "enabledPreviewProviders": [
            "OC\\Preview\\PNG",
            "OC\\Preview\\JPEG",
            "OC\\Preview\\GIF",
            "OC\\Preview\\BMP",
            "OC\\Preview\\XBitmap",
            "OC\\Preview\\MP3",
            "OC\\Preview\\TXT",
            "OC\\Preview\\MarkDown"
        ],
        "ldapUserCleanupInterval": 51,
        "sort_groups_by_name": false,
        "comments.managerFactory": "\\OC\\Comments\\ManagerFactory",
        "systemtags.managerFactory": "\\OC\\SystemTag\\ManagerFactory",
        "mail_template_class": "\\OC\\Mail\\EMailTemplate",
        "maintenance": false,
        "memcache.local": "\\OC\\Memcache\\APCu",
        "memcache.distributed": "\\OC\\Memcache\\Redis",
        "redis": {
            "host": "***REMOVED SENSITIVE VALUE***",
            "port": 0,
            "timeout": 1.5
        },
        "cache_path": "",
        "cache_chunk_gc_ttl": 86400,
        "mysql.utf8mb4": false,
        "tempdirectory": "\/data\/tmp",
        "hashingCost": 10,
        "blacklisted_files": [
            ".htaccess"
        ],
        "share_folder": "\/",
        "theme": "",
        "cipher": "AES-256-CFB",
        "minimum.supported.desktop.version": "2.0.0",
        "quota_include_external_storage": false,
        "filesystem_check_changes": 0,
        "part_file_in_storage": true,
        "mount_file": "\/usr\/local\/www\/nextcloud\/data\/mount.json",
        "filesystem_cache_readonly": false,
        "secret": "***REMOVED SENSITIVE VALUE***",
        "max_filesize_animated_gifs_public_sharing": 5,
        "filelocking.enabled": true,
        "filelocking.ttl": 3600,
        "memcache.locking": "\\OC\\Memcache\\Redis",
        "filelocking.debug": false,
        "upgrade.disable-web": true,
        "debug": false,
        "data-fingerprint": "",
        "gs.enabled": false,
        "gs.federation": "internal",
        "ldapProviderFactory": "\\OCA\\User_LDAP\\LDAPProviderFactory"
    }
}

Are you using external storage, if yes which one: local/smb/sftp/...
no

Are you using encryption: yes/no
no

[skjnldsv]

Pinging Dr @georgehrke 🔎

[Nils160988]

Not sure if this is still valid
@igorr-stc?
Or do you have any new information @georgehrke?

[skjnldsv]

@Nils160988 I guess @georgehrke is pretty busy :(

[georgehrke]

Valid issue

Spec: https://tools.ietf.org/html/rfc6638#section-3.2.8

A reschedule occurs when any "DTSTART", "DTEND", "DURATION", "DUE",
"RRULE", "RDATE", or "EXDATE" property changes in a calendar
component such that existing recurrence instances are impacted by the
changes, as shown in the table below. Servers MUST reset the
"PARTSTAT" property parameter value of all "ATTENDEE" properties,
except the one that corresponds to the "Organizer", to "NEEDS-ACTION"
for each calendar component change that causes any instance to be
rescheduled.

Needs to be reported upstream in Sabre/DAV (/ Sabre/VObject )

[georgehrke]

I created an upstream issue: sabre-io/dav#1282
I have to see if i will find time to send a patch.

[szaimen]

Hi, please update to 24.0.8 or better 25.0.2 and report back if it fixes the issue. Thank you!

[tobiasKaminsky]

No one worked on this, tested and still happens.

[onny]

@georgehrke Shouldn't PARTSTAT set to NEEDS-ACTION by the calendar app?
If I update the start time of an event following CalDav data gets submitted to the Nextcloud backend

BEGIN:VCALENDAR
CALSCALE:GREGORIAN
VERSION:2.0
PRODID:-//IDN nextcloud.com//Calendar app 4.2.1//EN
BEGIN:VEVENT
CREATED:20230223T182815Z
DTSTAMP:20230223T183600Z
LAST-MODIFIED:20230223T183600Z
SEQUENCE:4
UID:fe50b6ec-8933-4f8f-976b-542958efb601
DTSTART;VALUE=DATE:20230226
DTEND;VALUE=DATE:20230227
STATUS:CONFIRMED
SUMMARY:test neu 2
ATTENDEE;CN=user1;CUTYPE=INDIVIDUAL;PARTSTAT=ACCEPTED;ROLE=REQ-PARTICIPANT;
 LANGUAGE=en;SCHEDULE-STATUS=2.0:mailto:user1@localhost
ORGANIZER;CN=admin:mailto:admin@localhost
END:VEVENT
END:VCALENDAR

Shouldn't we already set PARTSTAT=NEEDS-ACTION for every attendee here? Or is this something which should be managed by nextcloud/apps/dav or sabre-io/dav backend?

[SebastianKrupinski]

Already resolved with above pull request

[tobiasKaminsky]

Reading the PR it seems that it only reset when using NC Calendar, but not when using e.g. Thunderbird to move an event?

[SebastianKrupinski]

@tobiasKaminsky confirmed. The issues still exists in TB.