Implement share provider for deck

Signed-off-by: Julius Härtl <jus@bitgrid.net>

lib/AppInfo/Application20.php

@@ -26,6 +26,7 @@ namespace OCA\Deck\AppInfo;
 use Closure;
 use Exception;
 use OC\EventDispatcher\SymfonyAdapter;
+use OC\Share20\ProviderFactory;
 use OCA\Deck\Activity\CommentEventHandler;
 use OCA\Deck\Capabilities;
 use OCA\Deck\Collaboration\Resources\ResourceProvider;
@@ -43,6 +44,8 @@ use OCA\Deck\Notification\Notifier;
 use OCA\Deck\Search\DeckProvider;
 use OCA\Deck\Service\FullTextSearchService;
 use OCA\Deck\Service\PermissionService;
+use OCA\Deck\Sharing\DeckShareProvider;
+use OCA\Deck\Sharing\Listener;
 use OCP\AppFramework\App;
 use OCP\AppFramework\Bootstrap\IBootContext;
 use OCP\AppFramework\Bootstrap\IBootstrap;
@@ -62,6 +65,8 @@ use OCP\IServerContainer;
 use OCP\IUser;
 use OCP\IUserManager;
 use OCP\Notification\IManager as NotificationManager;
+use OCP\Share\IManager;
+use OCP\Share\IProviderFactory;
 use OCP\Util;
 use Psr\Container\ContainerInterface;
 
@@ -92,6 +97,14 @@ class Application20 extends App implements IBootstrap {
 		$context->injectFn(Closure::fromCallable([$this, 'registerNotifications']));
 		$context->injectFn(Closure::fromCallable([$this, 'registerFullTextSearch']));
 		$context->injectFn(Closure::fromCallable([$this, 'registerCollaborationResources']));
+
+		$context->injectFn(function (IManager $shareManager) {
+			$shareManager->registerShareProvider(DeckShareProvider::class);
+		});
+
+		$context->injectFn(function (Listener $listener, IEventDispatcher $eventDispatcher) {
+			$listener->register($eventDispatcher);
+		});
 	}
 
 	public function register(IRegistrationContext $context): void {

lib/Db/BoardMapper.php

@@ -85,6 +85,16 @@ class BoardMapper extends DeckMapper implements IPermissionMapper {
 		return $board;
 	}
 
+	public function findAllForUser(string $userId, int $since = -1, $includeArchived = true): array {
+		$groups = $this->groupManager->getUserGroupIds(
+			$this->userManager->get($userId)
+		);
+		$userBoards = $this->findAllByUser($userId, null, null, $since, $includeArchived);
+		$groupBoards = $this->findAllByGroups($userId, $groups,null, null, $since, $includeArchived);
+		$circleBoards = $this->findAllByCircles($userId, null, null,  $since, $includeArchived);
+		return array_unique(array_merge($userBoards, $groupBoards, $circleBoards));
+	}
+
 	/**
 	 * Find all boards for a given user
 	 *

lib/Db/CardMapper.php

@@ -149,7 +149,8 @@ class CardMapper extends QBMapper implements IPermissionMapper {
 
 	public function queryCardsByBoards(array $boardIds): IQueryBuilder {
 		$qb = $this->db->getQueryBuilder();
-		$qb->select('c.*')
+		$qb->select('c.*', 's.board_id')
+			->selectAlias('s.title', 'stack_title')
 			->from('deck_cards', 'c')
 			->innerJoin('c', 'deck_stacks', 's', $qb->expr()->eq('s.id', 'c.stack_id'))
 			->andWhere($qb->expr()->in('s.board_id', $qb->createNamedParameter($boardIds, IQueryBuilder::PARAM_INT_ARRAY)));
@@ -279,6 +280,27 @@ class CardMapper extends QBMapper implements IPermissionMapper {
 		return $this->findEntities($qb);
 	}
 
+	public function searchRaw($boardIds, $term, $limit = null, $offset = null) {
+		$qb = $this->queryCardsByBoards($boardIds);
+		$qb->andWhere($qb->expr()->eq('c.deleted_at', $qb->createNamedParameter(0, IQueryBuilder::PARAM_INT)));
+		$qb->andWhere(
+			$qb->expr()->orX(
+				$qb->expr()->iLike('c.title', $qb->createNamedParameter('%' . $this->db->escapeLikeParameter($term) . '%')),
+				$qb->expr()->iLike('c.description', $qb->createNamedParameter('%' . $this->db->escapeLikeParameter($term) . '%'))
+			)
+		);
+		if ($limit !== null) {
+			$qb->setMaxResults($limit);
+		}
+		if ($offset !== null) {
+			$qb->setFirstResult($offset);
+		}
+		$result = $qb->execute();
+		$all = $result->fetchAll();
+		$result->closeCursor();
+		return $all;
+	}
+
 	public function delete(Entity $entity): Entity {
 		// delete assigned labels
 		$this->labelMapper->deleteLabelAssignmentsForCard($entity->getId());

lib/Service/BoardService.php

@@ -113,13 +113,13 @@ class BoardService {
 		$this->userId = $userId;
 	}
 
-	public function getUserBoards(int $since = -1, $includeArchived = true): array {
-		$userInfo = $this->getBoardPrerequisites();
-		$userBoards = $this->boardMapper->findAllByUser($userInfo['user'], null, null, $since, $includeArchived);
-		$groupBoards = $this->boardMapper->findAllByGroups($userInfo['user'], $userInfo['groups'],null, null, $since, $includeArchived);
-		$circleBoards = $this->boardMapper->findAllByCircles($userInfo['user'], null, null,  $since, $includeArchived);
-		return array_unique(array_merge($userBoards, $groupBoards, $circleBoards));
+	/**
+	 * Get all boards that are shared with a user, their groups or circles
+	 */
+	public function getUserBoards(int $since = -1, bool $includeArchived = true): array {
+		return $this->boardMapper->findAllForUser($this->userId, $since, $includeArchived);
 	}
+
 	/**
 	 * @return array
 	 */

lib/Service/CardService.php

@@ -29,6 +29,7 @@ namespace OCA\Deck\Service;
 use OCA\Deck\Activity\ActivityManager;
 use OCA\Deck\Activity\ChangeSet;
 use OCA\Deck\Db\AssignmentMapper;
+use OCA\Deck\Db\Board;
 use OCA\Deck\Db\Card;
 use OCA\Deck\Db\CardMapper;
 use OCA\Deck\Db\Acl;
@@ -116,9 +117,20 @@ class CardService {
 		return $cards;
 	}
 
-	public function search($boardIds, $term) {
-		$cards = $this->cardMapper->search($boardIds, $term);
-		return $cards;
+	public function search(string $term, int $limit = null, int $offset = null): array {
+		$boards = $this->boardService->getUserBoards();
+		$boardIds = array_map(static function (Board $board) {
+			return $board->getId();
+		}, $boards);
+		return $this->cardMapper->search($boardIds, $term, $limit, $offset);
+	}
+
+	public function searchRaw(string $term, int $limit = null, int $offset = null): array {
+		$boards = $this->boardService->getUserBoards();
+		$boardIds = array_map(static function (Board $board) {
+			return $board->getId();
+		}, $boards);
+		return $this->cardMapper->searchRaw($boardIds, $term, $limit, $offset);
 	}
 
 		/**

lib/Sharing/Listener.php

@@ -0,0 +1,113 @@
+<?php
+/*
+ * @copyright Copyright (c) 2020 Julius Härtl <jus@bitgrid.net>
+ *
+ * @author Julius Härtl <jus@bitgrid.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/>.
+ *
+ */
+
+declare(strict_types=1);
+
+
+namespace OCA\Deck\Sharing;
+
+
+use OC\Files\Filesystem;
+use OCP\EventDispatcher\IEventDispatcher;
+use OCP\Share\Events\VerifyMountPointEvent;
+use OCP\Share\IShare;
+use Symfony\Component\EventDispatcher\GenericEvent;
+
+class Listener {
+
+	public function __construct($userId) {
+		$this->userId = $userId;
+	}
+
+	public function register(IEventDispatcher $dispatcher): void {
+		/**
+		 * @psalm-suppress UndefinedClass
+		 */
+		$dispatcher->addListener('OCP\Share::preShare', [self::class, 'listenPreShare'], 1000);
+		$dispatcher->addListener(VerifyMountPointEvent::class, [self::class, 'listenVerifyMountPointEvent'], 1000);
+	}
+
+	public static function listenPreShare(GenericEvent $event): void {
+		/** @var self $listener */
+		$listener = \OC::$server->query(self::class);
+		$listener->overwriteShareTarget($event);
+	}
+
+	public static function listenVerifyMountPointEvent(VerifyMountPointEvent $event): void {
+		/** @var self $listener */
+		$listener = \OC::$server->query(self::class);
+		$listener->overwriteMountPoint($event);
+	}
+
+	public function overwriteShareTarget(GenericEvent $event): void {
+		/** @var IShare $share */
+		$share = $event->getSubject();
+
+		if ($share->getShareType() !== IShare::TYPE_DECK
+			&& $share->getShareType() !== DeckShareProvider::SHARE_TYPE_DECK_USER) {
+			return;
+		}
+
+		$target = DeckShareProvider::DECK_FOLDER_PLACEHOLDER . '/' . $share->getNode()->getName();
+		$target = Filesystem::normalizePath($target);
+		$share->setTarget($target);
+	}
+
+	public function overwriteMountPoint(VerifyMountPointEvent $event): void {
+		$share = $event->getShare();
+		$view = $event->getView();
+
+		if ($share->getShareType() !== IShare::TYPE_DECK
+			&& $share->getShareType() !== DeckShareProvider::SHARE_TYPE_DECK_USER) {
+			return;
+		}
+
+		if ($event->getParent() === DeckShareProvider::DECK_FOLDER_PLACEHOLDER) {
+			try {
+				$userId = $view->getOwner('/');
+			} catch (\Exception $e) {
+				// If we fail to get the owner of the view from the cache,
+				// e.g. because the user never logged in but a cron job runs
+				// We fallback to calculating the owner from the root of the view:
+				if (substr_count($view->getRoot(), '/') >= 2) {
+					// /37c09aa0-1b92-4cf6-8c66-86d8cac8c1d0/files
+					[, $userId, ] = explode('/', $view->getRoot(), 3);
+				} else {
+					// Something weird is going on, we can't fallback more
+					// so for now we don't overwrite the share path ¯\_(ツ)_/¯
+					return;
+				}
+			}
+
+			$parent = $this->getAttachmentFolder();
+			$event->setParent($parent);
+			if (!$event->getView()->is_dir($parent)) {
+				$event->getView()->mkdir($parent);
+			}
+		}
+	}
+
+	private function getAttachmentFolder() {
+		return \OC::$server->getConfig()->getUserValue($this->userId, 'deck', 'attachment_folder', '/Deck');
+	}
+}

lib/Sharing/ShareAPIHelper.php

@@ -0,0 +1,112 @@
+<?php
+/*
+ * @copyright Copyright (c) 2020 Julius Härtl <jus@bitgrid.net>
+ *
+ * @author Julius Härtl <jus@bitgrid.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/>.
+ *
+ */
+
+declare(strict_types=1);
+
+
+namespace OCA\Deck\Sharing;
+
+
+use OCA\Deck\Db\CardMapper;
+use OCP\IURLGenerator;
+use OCP\Share\IShare;
+
+class ShareAPIHelper {
+
+	private $urlGenerator;
+	private $cardMapper;
+
+	public function __construct(IURLGenerator $urlGenerator, CardMapper $cardMapper) {
+		$this->urlGenerator = $urlGenerator;
+		$this->cardMapper = $cardMapper;
+	}
+
+	public function formatShare(IShare $share): array {
+		$result = [];
+		$card = $this->cardMapper->find($share->getSharedWith());
+		$boardId = $this->cardMapper->findBoardId($card->getId());
+		$result['share_with'] = $share->getSharedWith();
+		$result['share_with_displayname'] = $card->getTitle();
+		$result['share_with_link'] = $this->urlGenerator->linkToRouteAbsolute('deck.page.index') . '#/board/' . $boardId . '/card/' . $card->getId();
+		return $result;
+	}
+
+	public function createShare(IShare $share, string $shareWith, int $permissions, $expireDate) {
+		$share->setSharedWith($shareWith);
+		$share->setPermissions($permissions);
+
+		if ($expireDate !== '') {
+			try {
+				$expireDate = $this->parseDate($expireDate);
+				$share->setExpirationDate($expireDate);
+			} catch (\Exception $e) {
+				throw new OCSNotFoundException($this->l->t('Invalid date, date format must be YYYY-MM-DD'));
+			}
+		}
+	}
+
+	/**
+	 * Make sure that the passed date is valid ISO 8601
+	 * So YYYY-MM-DD
+	 * If not throw an exception
+	 *
+	 * Copied from \OCA\Files_Sharing\Controller\ShareAPIController::parseDate.
+	 *
+	 * @param string $expireDate
+	 * @return \DateTime
+	 * @throws \Exception
+	 */
+	private function parseDate(string $expireDate): \DateTime {
+		try {
+			$date = $this->timeFactory->getDateTime($expireDate);
+		} catch (\Exception $e) {
+			throw new \Exception('Invalid date. Format must be YYYY-MM-DD');
+		}
+
+		if ($date === false) {
+			throw new \Exception('Invalid date. Format must be YYYY-MM-DD');
+		}
+
+		$date->setTime(0, 0, 0);
+
+		return $date;
+	}
+
+	/**
+	 * Returns whether the given user can access the given room share or not.
+	 *
+	 * A user can access a room share only if she is a participant of the room.
+	 *
+	 * @param IShare $share
+	 * @param string $user
+	 * @return bool
+	 */
+	public function canAccessShare(IShare $share, string $user): bool {
+		try {
+			$this->permissionService->checkPermission($this->cardMapper, $share->getSharedWith(), Acl::PERMISSION_READ, $user);
+		} catch (NoPermissionException $e) {
+			return false;
+		}
+		return true;
+	}
+}