Port dav calendar settings page to Vue.js

- Drop reliance on deprecated global jQuery object.
- Allow testing user interactions.
- Use newer technology stack.

---

Test user interactions with the groupware dav settings

Add infrastructure to test Vue components:

- Use recommended libraries:

    - https://vuejs.org/v2/guide/testing.html#Recommendations
    - Use jest-dom for robust assertions on the DOM state
    - Use user-event to be more representative of user actions

- Code is transpiled by Jest, with the help of vue-jest.

Ignore test files for no-unpublished-import. Prevent ESLint from
flagging:

```
/home/runner/work/server/server/apps/dav/src/views/CalDavSettings.spec.js
Error:   1:24  error  "@testing-library/vue" is not published         node/no-unpublished-import
Error:   2:23  error  "@testing-library/user-event" is not published  node/no-unpublished-import
```

Signed-off-by: François Freitag <mail@franek.fr>

1 files changed, 3 insertions, 74 deletions

diff --git a/apps/dav/templates/settings-admin-caldav.php b/apps/dav/templates/settings-admin-caldav.php
index 75d44c23a38..3a67f21a9cc 100644
--- a/apps/dav/templates/settings-admin-caldav.php
+++ b/apps/dav/templates/settings-admin-caldav.php
@@ -3,6 +3,7 @@
  * @copyright 2017, Georg Ehrke <oc.list@georgehrke.com>
  *
  * @author Georg Ehrke <oc.list@georgehrke.com>
+ * @author François Freitag <mail@franek.fr>
  *
  * @license GNU AGPL version 3 or any later version
  *
@@ -23,78 +24,6 @@
 
 script('dav', 'settings-admin-caldav');
 
-/** @var \OCP\IL10N $l */
-/** @var array $_ */
 ?>
-<form id="CalDAV" class="section">
-	<h2><?php p($l->t('Calendar server')); ?></h2>
-	<p class="settings-hint">
-		<?php print_unescaped(str_replace(
-			[
-				'{calendarappstoreopen}',
-				'{calendardocopen}',
-				'{linkclose}',
-			],
-			[
-				'<a target="_blank" href="../apps/office/calendar">',
-				'<a target="_blank" href="' . link_to_docs('user-sync-calendars') . '" rel="noreferrer noopener">',
-				'</a>',
-			],
-			$l->t('Also install the {calendarappstoreopen}Calendar app{linkclose}, or {calendardocopen}connect your desktop & mobile for syncing ↗{linkclose}.')
-		)); ?>
-	</p>
-	<p>
-		<input type="checkbox" name="caldav_send_invitations" id="caldavSendInvitations" class="checkbox"
-			<?php ($_['send_invitations'] === 'yes') ? print_unescaped('checked="checked"') : null ?>/>
-		<label for="caldavSendInvitations"><?php p($l->t('Send invitations to attendees')); ?></label>
-		<br>
-		<em>
-			<?php print_unescaped(str_replace(
-				[
-					'{emailopen}',
-					'{linkclose}',
-				],
-				[
-					'<a href="../admin#mail_general_settings">',
-					'</a>',
-				],
-				$l->t('Please make sure to properly set up {emailopen}the email server{linkclose}.')
-			)); ?>
-		</em>
-	</p>
-	<p>
-		<input type="checkbox" name="caldav_generate_birthday_calendar" id="caldavGenerateBirthdayCalendar" class="checkbox"
-			<?php ($_['generate_birthday_calendar'] === 'yes') ? print_unescaped('checked="checked"') : null ?>/>
-		<label for="caldavGenerateBirthdayCalendar"><?php p($l->t('Automatically generate a birthday calendar')); ?></label>
-		<br>
-		<em><?php p($l->t('Birthday calendars will be generated by a background job.')); ?></em><br>
-		<em><?php p($l->t('Hence they will not be available immediately after enabling but will show up after some time.')); ?></em>
-	</p>
-	<p>
-		<input type="checkbox" name="caldav_send_reminders_notifications" id="caldavSendRemindersNotifications" class="checkbox"
-			<?php ($_['send_reminders_notifications'] === 'yes') ? print_unescaped('checked="checked"') : null ?>/>
-		<label for="caldavSendRemindersNotifications"><?php p($l->t('Send notifications for events')); ?></label>
-		<br>
-		<em>
-			<?php print_unescaped(str_replace(
-				[
-					'{emailopen}',
-					'{linkclose}',
-				],
-				[
-					'<a href="../admin#mail_general_settings">',
-					'</a>',
-				],
-				$l->t('Please make sure to properly set up {emailopen}the email server{linkclose}.')
-			)); ?>
-		</em>
-		<br>
-		<em><?php p($l->t('Notifications are sent via background jobs, so these must occur often enough.')); ?></em>
-	</p>
-	<p>
-		<input type="checkbox" name="caldav_send_reminders_notifications_push" id="caldavSendRemindersNotificationsPush" class="checkbox"
-			<?php ($_['send_reminders_notifications_push'] === 'yes') ? print_unescaped('checked="checked"') : null ?>
-			<?php ($_['send_reminders_notifications'] === 'yes') ? null : print_unescaped('disabled="disabled"') ?> />
-		<label for="caldavSendRemindersNotificationsPush"><?php p($l->t('Enable notifications for events via push')); ?></label>
-	</p>
-</form>
+
+<div id="settings-admin-caldav"></div>