[Feature Request] Subscribe to calendars

[nkakouros]

I am not sure this is the place to report this (instead of nextcloud/server or nextcloud/tasks), but since the option to subscribe to a calendar is in the calendar app, I chose this repo.

Steps to reproduce

1. Create a new calendar in Nextcloud with task support
2. Copy the private link of the calendar
3. Add an event to the calendar
4. Add a task to the calendar
5. Add the calendar via + -> New subscription from link

I am using a Nextcloud calendar with task support but any endpoint with a calendar with tasks would work the same.

Expected behaviour

I would expect the tasks in the calendar to also appear in the Tasks app.

Actual behaviour

The calendar does not show in the tasks app.

Calendar app

2.3.4

CalDAV-clients used: None

Client configuration

Browser: Firefox Nightly 95.0a

Operating system: Macos

Server configuration

Operating system: Ubuntu 20.04.2 LTS

Web server: Apache

Database: MariaDB

PHP version: 8.0.3

Nextcloud Version: 22.2.3

Updated from an older installed version or fresh install: updated from 21

List of activated apps:

accessibility
comments
deck
files_external
files_versions
lookup_server_connector
password_policy
settings
text
user_ldap
activity
contacts
encryption
files_pdfviewer
files_videoplayer
news
photos
sharebymail
theming
user_status
admin_audit
contactsinteraction
extract
files_rightclick
firstrunwizard
nextcloud_announcements
privacy
support
twofactor_backupcodes
viewer
calendar
cookbook
federatedfilesharing
files_sharing
health
notes
provisioning_api
survey_client
twofactor_nextcloud_notification
weather_status
circles
dashboard
federation
files_texteditor
integration_google
notifications
recommendations
systemtags
twofactor_totp
workflowengine
cloud_federation_api
dav
files
files_trashbin
logreader
oauth2
serverinfo
tasks
updatenotification

Nextcloud configuration:

<?php
$CONFIG = array (
  'passwordsalt' => 'salt',
  'secret' => 'secret',
  'trusted_domains' =>
  array (
    0 => 'domain',
  ),
  'datadirectory' => '/var/www/html/nextcloud/data',
  'dbtype' => 'mysql',
  'version' => '22.2.3.0',
  'overwrite.cli.url' => 'url',
  'dbname' => 'dbname',
  'dbhost' => 'localhost',
  'dbport' => '3306',
  'dbtableprefix' => 'oc_',
  'mysql.utf8mb4' => true,
  'dbuser' => 'user',
  'dbpassword' => 'pass',
  'installed' => true,
  'htaccess.RewriteBase' => '/',
  'instanceid' => 'id',
  'theme' => '',
  'loglevel' => 0,
  'maintenance' => false,
  'overwrite' =>
  array (
    'cli' =>
    array (
      'url' => 'url',
    ),
  ),
  'htaccess' =>
  array (
    'RewriteBase' => '/',
  ),
  'updater.release.channel' => 'stable',
  'config_is_read_only' => true,
  'app_install_overwrite' =>
  array (
    0 => 'calendar',
  ),
  'twofactor_enforced' => 'true',
  'twofactor_enforced_groups' =>
  array (
    0 => 'admin',
  ),
  'twofactor_enforced_excluded_groups' =>
  array (
  ),
  'updater.secret' => 'secret',
);

Logs

Web server error log (e.g. /var/log/apache)

nothing relevant

Log file (data/nextcloud.log)

nothing relevant

Browser log

nothing relevant

[raimund-schluessler]

Subscription is done on a per app level. Subscribing to a webcal link does not make the resource behind it available to every CalDAV client connected to the Nextcloud server.

Since the Tasks app does not implement subscriptions, you won't be able to see tasks from a WebCAL link in the Nextcloud Tasks app.

[nkakouros]

Thanks for the insight. When I import a calendar manually from the calendar app's interface, the calendar gets created both in the calendar app and in the tasks app (if the calendar contains tasks of course). Couldn't the subscription process be linked to what import does? Just a wild guess. But I am mentioning to point out the slight difference between importing and subscribing which took me at least by surprise.

[raimund-schluessler]

There is an issue in server about propagating subscribed calendars to clients via CalDAV: nextcloud/server#17754