Created infrastructure to show circles' shared files

There is a proposal to allow users to filter files shared to circles. This commit is needed to provide the infrastucture for it.

Issue: https://github.com/nextcloud/circles/issues/137

Changes to comply to https://github.com/coletivoEITA/circles/pull/2

Polishing: get files shared to circles in caldav

Signed-off-by: Vinicius Cubas Brand <viniciuscb@gmail.com>
Signed-off-by: Maxence Lange <maxence@artificial-owl.com>
Signed-off-by: Morris Jobke <hey@morrisjobke.de>

2 files changed, 38 insertions, 5 deletions

diff --git a/apps/dav/lib/Connector/Sabre/FilesReportPlugin.php b/apps/dav/lib/Connector/Sabre/FilesReportPlugin.php
index 3e85615638b..f4e5de0ea43 100644
--- a/apps/dav/lib/Connector/Sabre/FilesReportPlugin.php
+++ b/apps/dav/lib/Connector/Sabre/FilesReportPlugin.php
@@ -46,6 +46,7 @@ class FilesReportPlugin extends ServerPlugin {
 	const NS_OWNCLOUD = 'http://owncloud.org/ns';
 	const REPORT_NAME            = '{http://owncloud.org/ns}filter-files';
 	const SYSTEMTAG_PROPERTYNAME = '{http://owncloud.org/ns}systemtag';
+	const CIRCLE_PROPERTYNAME = '{http://owncloud.org/ns}circle';
 
 	/**
 	 * Reference to main server object
@@ -256,14 +257,19 @@ class FilesReportPlugin extends ServerPlugin {
 		$ns = '{' . $this::NS_OWNCLOUD . '}';
 		$resultFileIds = null;
 		$systemTagIds = [];
+		$circlesIds = [];
 		$favoriteFilter = null;
 		foreach ($filterRules as $filterRule) {
 			if ($filterRule['name'] === $ns . 'systemtag') {
 				$systemTagIds[] = $filterRule['value'];
 			}
+			if ($filterRule['name'] === self::CIRCLE_PROPERTYNAME) {
+				$circlesIds[] = $filterRule['value'];
+			}
 			if ($filterRule['name'] === $ns . 'favorite') {
 				$favoriteFilter = true;
 			}
+
 		}
 
 		if ($favoriteFilter !== null) {
@@ -282,6 +288,15 @@ class FilesReportPlugin extends ServerPlugin {
 			}
 		}
 
+		if (!empty($circlesIds)) {
+			$fileIds = $this->getCirclesFileIds($circlesIds);
+			if (empty($resultFileIds)) {
+				$resultFileIds = $fileIds;
+			} else {
+				$resultFileIds = array_intersect($fileIds, $resultFileIds);
+			}
+		}
+
 		return $resultFileIds;
 	}
 
@@ -329,6 +344,19 @@ class FilesReportPlugin extends ServerPlugin {
 	}
 
 	/**
+	 * @suppress PhanUndeclaredClassMethod
+	 * @param array $circlesIds
+	 * @return array
+	 */
+	private function getCirclesFileIds(array $circlesIds) {
+		if (!\OC::$server->getAppManager()->isEnabledForUser('circles') || !class_exists('\OCA\Circles\ShareByCircleProvider')) {
+			return array();
+		}
+		return \OCA\Circles\Api\v1\Circles::getFilesForCircles($circlesIds);
+	}
+
+
+	/**
 	 * Prepare propfind response for the given nodes
 	 *
 	 * @param string $filesUri $filesUri URI leading to root of the files URI,
diff --git a/apps/dav/lib/Connector/Sabre/Principal.php b/apps/dav/lib/Connector/Sabre/Principal.php
index a441e1c8122..e7816185394 100644
--- a/apps/dav/lib/Connector/Sabre/Principal.php
+++ b/apps/dav/lib/Connector/Sabre/Principal.php
@@ -45,7 +45,7 @@ use OCP\IUserManager;
 use OCP\IUserSession;
 use OCP\Share\IManager as IShareManager;
 use Sabre\DAV\Exception;
-use \Sabre\DAV\PropPatch;
+use Sabre\DAV\PropPatch;
 use Sabre\DAVACL\PrincipalBackend\BackendInterface;
 
 class Principal implements BackendInterface {
@@ -145,7 +145,11 @@ class Principal implements BackendInterface {
 				return $this->userToPrincipal($user);
 			}
 		} else if ($prefix === 'principals/circles') {
-			return $this->circleToPrincipal($name);
+			try {
+				return $this->circleToPrincipal($name);
+			} catch (QueryException $e) {
+				return null;
+			}
 		}
 		return null;
 	}
@@ -406,6 +410,7 @@ class Principal implements BackendInterface {
 	/**
 	 * @param string $circleUniqueId
 	 * @return array|null
+	 * @throws \OCP\AppFramework\QueryException
 	 * @suppress PhanUndeclaredClassMethod
 	 * @suppress PhanUndeclaredClassCatch
 	 */
@@ -438,9 +443,9 @@ class Principal implements BackendInterface {
 	 * Returns the list of circles a principal is a member of
 	 *
 	 * @param string $principal
-	 * @param bool $needGroups
 	 * @return array
 	 * @throws Exception
+	 * @throws \OCP\AppFramework\QueryException
 	 * @suppress PhanUndeclaredClassMethod
 	 */
 	public function getCircleMembership($principal):array {
@@ -458,13 +463,13 @@ class Principal implements BackendInterface {
 			$circles = \OCA\Circles\Api\v1\Circles::joinedCircles($name, true);
 
 			$circles = array_map(function($circle) {
-				/** @var \OCA\Circles\Model\Circle $group */
+				/** @var \OCA\Circles\Model\Circle $circle */
 				return 'principals/circles/' . urlencode($circle->getUniqueId());
 			}, $circles);
 
 			return $circles;
-
 		}
+
 		return [];
 	}