enh(performance): get deck share permissions in one query

Signed-off-by: grnd-alt <git@belakkaf.net>

Author: grnd-alt

lib/Db/AclMapper.php

@@ -43,6 +43,33 @@ public function findAll(int $boardId, ?int $limit = null, ?int $offset = null) {
 		return $this->findEntities($qb);
 	}
 
+	/**
+	 * @return array<int, Acl[]> Acl entries grouped by card id
+	 * @throws \OCP\DB\Exception
+	 */
+	public function findInCards(array $cardIds, ?int $limit = null, ?int $offset = null): array {
+		$qb = $this->db->getQueryBuilder();
+		$qb->select('acl.id', 'acl.board_id', 'acl.type', 'acl.participant', 'acl.permission_edit', 'acl.permission_share', 'acl.permission_manage', 'acl.created_at', 'acl.last_modified_at', 'c.id AS card_id')
+			->from('deck_board_acl', 'acl')
+			->innerJoin('acl', 'deck_boards', 'b', 'acl.board_id = b.id')
+			->innerJoin('b', 'deck_stacks', 's', 's.board_id = b.id')
+			->innerJoin('s', 'deck_cards', 'c', 'c.stack_id = s.id')
+			->where($qb->expr()->in('c.id', $qb->createParameter('cardIds')))
+			->setMaxResults($limit)
+			->setFirstResult($offset);
+
+		$aclsByCardId = [];
+		foreach ($this->chunkQuery($cardIds, function (array $ids) use ($qb) {
+			$qb->setParameter('cardIds', $ids, IQueryBuilder::PARAM_INT_ARRAY);
+			return $qb->executeQuery()->fetchAll();
+		}) as $row) {
+			$cardId = (int)$row['card_id'];
+			unset($row['card_id']);
+			$aclsByCardId[$cardId][] = Acl::fromRow($row);
+		}
+		return $aclsByCardId;
+	}
+
 	public function findIn(array $boardIds, ?int $limit = null, ?int $offset = null): array {
 		$qb = $this->db->getQueryBuilder();
 		$qb->select('id', 'board_id', 'type', 'participant', 'permission_edit', 'permission_share', 'permission_manage')

lib/Service/PermissionService.php

@@ -63,6 +63,31 @@ public function setAccessToken(string $token) {
 		$this->accessToken = $token;
 	}
 
+	/**
+	 * Get permissions for all supplied card ids
+	 * @param int[] $cardIds
+	 * @param ?string $userId
+	 * @param bool $allowDeleted
+	 * @return array<int, array<Acl::PERMISSION_*, bool>>
+	 */
+	public function getPermissionsForCards(array $cardIds, ?string $userId = null, bool $allowDeleted = false): array {
+		if ($userId === null) {
+			$userId = $this->userId;
+		}
+		$permissions = $this->aclMapper->findInCards($cardIds);
+		return array_map(
+			function (array $acls) use ($userId) {
+				return [
+					Acl::PERMISSION_READ => $this->userCan($acls, Acl::PERMISSION_READ, $userId),
+					Acl::PERMISSION_EDIT => $this->userCan($acls, Acl::PERMISSION_EDIT, $userId),
+					Acl::PERMISSION_MANAGE => $this->userCan($acls, Acl::PERMISSION_MANAGE, $userId),
+					Acl::PERMISSION_SHARE => $this->userCan($acls, Acl::PERMISSION_SHARE, $userId),
+				];
+			},
+			$permissions
+		);
+	}
+
 	/**
 	 * Get current user permissions for a board by id
 	 *

lib/Sharing/DeckShareProvider.php

@@ -270,22 +270,6 @@ private function createShareObject(array $data): IShare {
 		return $share;
 	}
 
-	private function applyBoardPermission($share, $permissions, $userId) {
-		try {
-			$this->permissionService->checkPermission($this->cardMapper, $share->getSharedWith(), Acl::PERMISSION_EDIT, $userId, true);
-		} catch (NoPermissionException $e) {
-			$permissions &= Constants::PERMISSION_ALL - Constants::PERMISSION_UPDATE;
-			$permissions &= Constants::PERMISSION_ALL - Constants::PERMISSION_CREATE;
-			$permissions &= Constants::PERMISSION_ALL - Constants::PERMISSION_DELETE;
-		}
-
-		try {
-			$this->permissionService->checkPermission($this->cardMapper, $share->getSharedWith(), Acl::PERMISSION_SHARE, $userId, true);
-		} catch (NoPermissionException $e) {
-			$permissions &= Constants::PERMISSION_ALL - Constants::PERMISSION_SHARE;
-		}
-		$share->setPermissions($permissions);
-	}
 	/**
 	 * @inheritDoc
 	 */
@@ -653,11 +637,13 @@ private function resolveSharesForRecipient(array $shares, string $userId): array
 
 			/** @var int[] $ids */
 			$ids = [];
+			$cardIds = [];
 			/** @var IShare[] $shareMap */
 			$shareMap = [];
 
 			foreach ($shareSlice as $share) {
 				$ids[] = (int)$share->getId();
+				$cardIds[] = (int)$share->getSharedWith();
 				$shareMap[$share->getId()] = $share;
 			}
 
@@ -674,8 +660,22 @@ private function resolveSharesForRecipient(array $shares, string $userId): array
 
 			$stmt = $query->executeQuery();
 
+			$permissions = $this->permissionService->getPermissionsForCards($cardIds, $userId);
+
 			while ($data = $stmt->fetch()) {
-				$this->applyBoardPermission($shareMap[$data['parent']], (int)$data['permissions'], $userId);
+				$parent = $shareMap[$data['parent']];
+				$sharePermissions = (int)$data['permissions'];
+				if (isset($permissions[(int)$parent->getSharedWith()])) {
+					if ($permissions[(int)$parent->getSharedWith()][Acl::PERMISSION_EDIT] === false) {
+						$sharePermissions &= Constants::PERMISSION_ALL - Constants::PERMISSION_UPDATE;
+						$sharePermissions &= Constants::PERMISSION_ALL - Constants::PERMISSION_CREATE;
+						$sharePermissions &= Constants::PERMISSION_ALL - Constants::PERMISSION_DELETE;
+					}
+					if ($permissions[(int)$parent->getSharedWith()][Acl::PERMISSION_SHARE] === false) {
+						$sharePermissions &= Constants::PERMISSION_ALL - Constants::PERMISSION_SHARE;
+					}
+				}
+				$shareMap[$data['parent']]->setPermissions($sharePermissions);
 				$shareMap[$data['parent']]->setTarget($data['file_target']);
 			}