Add Public Calendar Provider

Signed-off-by: Anna Larch <anna@nextcloud.com>
Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>

3 files changed, 86 insertions, 10 deletions

diff --git a/apps/dav/lib/CalDAV/CalDavBackend.php b/apps/dav/lib/CalDAV/CalDavBackend.php
index 5f0c1bf3c48..64ee76f94d1 100644
--- a/apps/dav/lib/CalDAV/CalDavBackend.php
+++ b/apps/dav/lib/CalDAV/CalDavBackend.php
@@ -1845,17 +1845,19 @@ class CalDavBackend extends AbstractBackend implements SyncSupport, Subscription
 				$outerQuery->createNamedParameter(self::CALENDAR_TYPE_CALENDAR)));
 
 		// only return public items for shared calendars for now
-		if ($calendarInfo['principaluri'] !== $calendarInfo['{http://owncloud.org/ns}owner-principal']) {
+		if (isset($calendarInfo['{http://owncloud.org/ns}owner-principal']) === false || $calendarInfo['principaluri'] !== $calendarInfo['{http://owncloud.org/ns}owner-principal']) {
 			$innerQuery->andWhere($innerQuery->expr()->eq('c.classification',
 				$outerQuery->createNamedParameter(self::CLASSIFICATION_PUBLIC)));
 		}
 
-		$or = $innerQuery->expr()->orX();
-		foreach ($searchProperties as $searchProperty) {
-			$or->add($innerQuery->expr()->eq('op.name',
-				$outerQuery->createNamedParameter($searchProperty)));
+		if (!empty($searchProperties)) {
+			$or = $innerQuery->expr()->orX();
+			foreach ($searchProperties as $searchProperty) {
+				$or->add($innerQuery->expr()->eq('op.name',
+					$outerQuery->createNamedParameter($searchProperty)));
+			}
+			$innerQuery->andWhere($or);
 		}
-		$innerQuery->andWhere($or);
 
 		if ($pattern !== '') {
 			$innerQuery->andWhere($innerQuery->expr()->iLike('op.value',
@@ -1878,7 +1880,7 @@ class CalDavBackend extends AbstractBackend implements SyncSupport, Subscription
 			}
 		}
 
-		if (isset($options['types'])) {
+		if (!empty($options['types'])) {
 			$or = $outerQuery->expr()->orX();
 			foreach ($options['types'] as $type) {
 				$or->add($outerQuery->expr()->eq('componenttype',
@@ -1887,8 +1889,7 @@ class CalDavBackend extends AbstractBackend implements SyncSupport, Subscription
 			$outerQuery->andWhere($or);
 		}
 
-		$outerQuery->andWhere($outerQuery->expr()->in('c.id',
-			$outerQuery->createFunction($innerQuery->getSQL())));
+		$outerQuery->andWhere($outerQuery->expr()->in('c.id', $outerQuery->createFunction($innerQuery->getSQL())));
 
 		if ($offset) {
 			$outerQuery->setFirstResult($offset);
diff --git a/apps/dav/lib/CalDAV/CalendarImpl.php b/apps/dav/lib/CalDAV/CalendarImpl.php
index 4f34e604c81..356f2800031 100644
--- a/apps/dav/lib/CalDAV/CalendarImpl.php
+++ b/apps/dav/lib/CalDAV/CalendarImpl.php
@@ -1,4 +1,7 @@
 <?php
+
+declare(strict_types=1);
+
 /**
  * @copyright 2017, Georg Ehrke <oc.list@georgehrke.com>
  *
@@ -51,7 +54,7 @@ class CalendarImpl implements ICalendar {
 		$this->calendarInfo = $calendarInfo;
 		$this->backend = $backend;
 	}
-	
+
 	/**
 	 * @return string defining the technical unique key
 	 * @since 13.0.0
diff --git a/apps/dav/lib/CalDAV/CalendarProvider.php b/apps/dav/lib/CalDAV/CalendarProvider.php
new file mode 100644
index 00000000000..30eb6ae4268
--- /dev/null
+++ b/apps/dav/lib/CalDAV/CalendarProvider.php
@@ -0,0 +1,72 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * @copyright 2021 Anna Larch <anna.larch@gmx.net>
+ *
+ * @author Anna Larch <anna.larch@gmx.net>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+namespace OCA\DAV\CalDAV;
+
+use OCP\Calendar\ICalendarProvider;
+use OCP\IConfig;
+use OCP\IL10N;
+
+class CalendarProvider implements ICalendarProvider {
+
+	/** @var CalDavBackend */
+	private $calDavBackend;
+
+	/** @var IL10N */
+	private $l10n;
+
+	/** @var IConfig */
+	private $config;
+
+	public function __construct(CalDavBackend $calDavBackend, IL10N $l10n, IConfig $config) {
+		$this->calDavBackend = $calDavBackend;
+		$this->l10n = $l10n;
+		$this->config = $config;
+	}
+
+	public function getCalendars(string $principalUri, array $calendarUris = []): array {
+		$calendarInfos = [];
+		if (empty($calendarUris)) {
+			$calendarInfos[] = $this->calDavBackend->getCalendarsForUser($principalUri);
+		} else {
+			foreach ($calendarUris as $calendarUri) {
+				$calendarInfos[] = $this->calDavBackend->getCalendarByUri($principalUri, $calendarUri);
+			}
+		}
+
+		$calendarInfos = array_filter($calendarInfos);
+
+		$iCalendars = [];
+		foreach ($calendarInfos as $calendarInfo) {
+			$calendar = new Calendar($this->calDavBackend, $calendarInfo, $this->l10n, $this->config);
+			$iCalendars[] = new CalendarImpl(
+				$calendar,
+				$calendarInfo,
+				$this->calDavBackend,
+			);
+		}
+		return $iCalendars;
+	}
+}