BaseMapper::findAllByName() - Code Metrics - Inspection of "Match each whitespace-separated substring separate..." - owncloud/music - Measure and Improve Code Quality continuously with Scrutinizer

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Push — master ( 1fce36...731973 )

by Pauli

created 2021-08-28 07:54 UTC

BaseMapper::findAllByName() A

↳ Parent: BaseMapper

Complexity

Conditions	4
Paths	6

Size

Total Lines	25
Code Lines	16

Duplication

Lines	0
Ratio	0 %

Importance

Changes	1
Bugs	0	Features	1

Metric	Value
cc	4
eloc	16
nc	6
nop	9
dl	0
loc	25
rs	9.7333
c	1
b	0
f	1

How to fix Many Parameters

<?php declare(strict_types=1);

/**
 * ownCloud - Music app
 *
 * This file is licensed under the Affero General Public License version 3 or
 * later. See the COPYING file.
 *
 * @author Pauli Järvinen <[email protected]>
 * @copyright Pauli Järvinen 2016 - 2021
 */

namespace OCA\Music\Db;

use \OCP\AppFramework\Db\DoesNotExistException;
use \OCP\AppFramework\Db\Entity;
use \OCP\AppFramework\Db\Mapper;
use \OCP\AppFramework\Db\MultipleObjectsReturnedException;
use \OCP\IDBConnection;

use \OCA\Music\AppFramework\Db\UniqueConstraintViolationException;
use \OCA\Music\Utility\Util;

/**
 * Common base class for data access classes of the Music app
 */
abstract class BaseMapper extends Mapper {
	const SQL_DATE_FORMAT = 'Y-m-d H:i:s.v';

	protected $nameColumn;

	public function __construct(IDBConnection $db, string $tableName, string $entityClass, string $nameColumn) {
		parent::__construct($db, $tableName, $entityClass);
		$this->nameColumn = $nameColumn;
	}

	/**
	 * Create an empty object of the entity class bound to this mapper
	 */
	public function createEntity() : Entity {
		return new $this->entityClass();
	}

	/**
	 * Find a single entity by id and user_id
	 * @throws DoesNotExistException if the entity does not exist
	 * @throws MultipleObjectsReturnedException if more than one entity exists
	 */
	public function find(int $id, string $userId) : Entity {
		$sql = $this->selectUserEntities("`{$this->getTableName()}`.`id` = ?");
		return $this->findEntity($sql, [$userId, $id]);
	}

	/**
	 * Find all entities matching the given IDs. Specifying the owning user is optional.
	 * @param integer[] $ids  IDs of the entities to be found
	 * @param string|null $userId
	 * @return Entity[]
	 */
	public function findById(array $ids, string $userId=null) : array {
		$count = \count($ids);
		$condition = "`{$this->getTableName()}`.`id` IN ". $this->questionMarks($count);

		if (empty($userId)) {
			$sql = $this->selectEntities($condition);
		} else {
			$sql = $this->selectUserEntities($condition);
			$ids = \array_merge([$userId], $ids);
		}

		return $this->findEntities($sql, $ids);
	}

	/**
	 * Find all user's entities
	 * @param string|null $createdMin Optional minimum `created` timestamp.
	 * @param string|null $createdMax Optional maximum `created` timestamp.
	 * @param string|null $updatedMin Optional minimum `updated` timestamp.
	 * @param string|null $updatedMax Optional maximum `updated` timestamp.
	 * @return Entity[]
	 */
	public function findAll(string $userId, int $sortBy=SortBy::None, int $limit=null, int $offset=null,
							?string $createdMin=null, ?string $createdMax=null, ?string $updatedMin=null, ?string $updatedMax=null) : array {
		$sorting = $this->formatSortingClause($sortBy);
		[$condition, $params] = $this->formatTimestampConditions($createdMin, $createdMax, $updatedMin, $updatedMax);
		$sql = $this->selectUserEntities($condition, $sorting);
		\array_unshift($params, $userId);
		return $this->findEntities($sql, $params, $limit, $offset);
	}

	/**
	 * Find all user's entities matching the given name
	 * @param string|null $createdMin Optional minimum `created` timestamp.
	 * @param string|null $createdMax Optional maximum `created` timestamp.
	 * @param string|null $updatedMin Optional minimum `updated` timestamp.
	 * @param string|null $updatedMax Optional maximum `updated` timestamp.
	 * @return Entity[]
	 */
	public function findAllByName(
		?string $name, string $userId, bool $fuzzy=false, int $limit=null, int $offset=null,
		?string $createdMin=null, ?string $createdMax=null, ?string $updatedMin=null, ?string $updatedMax=null) : array {

		$nameCol = "`{$this->getTableName()}`.`{$this->nameColumn}`";
		if ($name === null) {
			$condition = "$nameCol IS NULL";
			$params = [$userId];
		} elseif ($fuzzy) {
			$condition = "LOWER($nameCol) LIKE LOWER(?)";
			$params = [$userId, self::prepareFuzzySearchString($name)];
		} else {
			$condition = "LOWER($nameCol) = LOWER(?)";
			$params = [$userId, $name];
		}

		[$timestampConds, $timestampParams] = $this->formatTimestampConditions($createdMin, $createdMax, $updatedMin, $updatedMax);
		if (!empty($timestampConds)) {
			$condition .= ' AND ' . $timestampConds;
			$params = \array_merge($params, $timestampParams);
		}

		$sql = $this->selectUserEntities($condition, "ORDER BY LOWER($nameCol)");

		return $this->findEntities($sql, $params, $limit, $offset);
	}

	/**
	 * Find all user's starred entities
	 * @return Entity[]
	 */
	public function findAllStarred(string $userId, int $limit=null, int $offset=null) : array {
		$sql = $this->selectUserEntities(
				"`{$this->getTableName()}`.`starred` IS NOT NULL",
				"ORDER BY LOWER(`{$this->getTableName()}`.`{$this->nameColumn}`)");
		return $this->findEntities($sql, [$userId], $limit, $offset);
	}

	/**
	 * Find IDs of all user's entities of this kind
	 * @return int[]
	 */
	public function findAllIds(string $userId) : array {
		$sql = "SELECT `id` FROM `{$this->getTableName()}` WHERE `user_id` = ?";
		$result = $this->execute($sql, [$userId]);

		return \array_map('intval', $result->fetchAll(\PDO::FETCH_COLUMN));
	}

	/**
	 * Find IDs of all users owning any entities of this mapper
	 * @return string[]
	 */
	public function findAllUsers() : array {
		$sql = "SELECT DISTINCT(`user_id`) FROM `{$this->getTableName()}`";
		$result = $this->execute($sql);

		return $result->fetchAll(\PDO::FETCH_COLUMN);
	}

	/**
	 * Delete all entities with given IDs without specifying the user
	 * @param integer[] $ids  IDs of the entities to be deleted
	 */
	public function deleteById(array $ids) : void {
		$count = \count($ids);
		if ($count === 0) {
			return;
		}
		$this->deleteByCond('`id` IN ' . $this->questionMarks($count), $ids);
	}

	/**
	 * Delete all entities matching the given SQL condition
	 * @param string $condition SQL 'WHERE' condition (without the keyword 'WHERE')
	 * @param array $params SQL parameters for the condition
	 */
	protected function deleteByCond(string $condition, array $params) : void {
		$sql = "DELETE FROM `{$this->getTableName()}` WHERE ". $condition;
		$this->execute($sql, $params);
	}

	/**
	 * Delete all entities of the given user
	 */
	public function deleteAll(string $userId) : void {
		$sql = "DELETE FROM `{$this->getTableName()}` WHERE `user_id` = ?";
		$this->execute($sql, [$userId]);
	}

	/**
	 * Tests if entity with given ID and user ID exists in the database
	 */
	public function exists(int $id, string $userId) : bool {
		$sql = "SELECT 1 FROM `{$this->getTableName()}` WHERE `id` = ? AND `user_id` = ?";
		$result = $this->execute($sql, [$id, $userId]);
		return $result->rowCount() > 0;
	}

	/**
	 * Count all entities of a user
	 */
	public function count(string $userId) : int {
		$sql = "SELECT COUNT(*) AS count FROM `{$this->getTableName()}` WHERE `user_id` = ?";
		$result = $this->execute($sql, [$userId]);
		$row = $result->fetch();
		return \intval($row['count']);
	}

	/**
	 * {@inheritDoc}
	 * @see \OCP\AppFramework\Db\Mapper::insert()
	 */
	public function insert(Entity $entity) : Entity {
		$now = new \DateTime();
		$nowStr = $now->format(self::SQL_DATE_FORMAT);
		$entity->setCreated($nowStr);
		$entity->setUpdated($nowStr);

		try {
			return parent::insert($entity);
		} catch (\Doctrine\DBAL\Exception\UniqueConstraintViolationException $e) {
			throw new UniqueConstraintViolationException($e->getMessage(), $e->getCode(), $e);
		} catch (\OCP\DB\Exception $e) {
filter:
    dependency_paths: ["lib/*"]
			// Nextcloud 21
			if ($e->getReason() == \OCP\DB\Exception::REASON_UNIQUE_CONSTRAINT_VIOLATION) {
				throw new UniqueConstraintViolationException($e->getMessage(), $e->getCode(), $e);
			} else {
				throw $e;
			}
		}
	}

	/**
	 * {@inheritDoc}
	 * @see \OCP\AppFramework\Db\Mapper::update()
	 */
	public function update(Entity $entity) : Entity {
		$now = new \DateTime();
		$entity->setUpdated($now->format(self::SQL_DATE_FORMAT));
		return parent::update($entity);
	}

	/**
	 * Insert an entity, or if an entity with the same identity already exists,
	 * update the existing entity.
	 * @return Entity The inserted or updated entity, containing also the id field
	 */
	public function insertOrUpdate(Entity $entity) : Entity {
		try {
			return $this->insert($entity);
		} catch (UniqueConstraintViolationException $ex) {
			$existingEntity = $this->findUniqueEntity($entity);
			$entity->setId($existingEntity->getId());
			$entity->setCreated($existingEntity->getCreated());
			return $this->update($entity);
		}
	}

	/**
	 * Set the "starred" column of the given entities
	 * @param \DateTime|null $date
	 * @param integer[] $ids
	 * @param string $userId
	 * @return int number of modified entities
	 */
	public function setStarredDate(?\DateTime $date, array $ids, string $userId) : int {
		$count = \count($ids);
		if (!empty($date)) {
			$date = $date->format(self::SQL_DATE_FORMAT);
		}

		$sql = "UPDATE `{$this->getTableName()}` SET `starred` = ?
				WHERE `id` IN {$this->questionMarks($count)} AND `user_id` = ?";
		$params = \array_merge([$date], $ids, [$userId]);
		return $this->execute($sql, $params)->rowCount();
	}

	public function latestInsertTime(string $userId) : ?\DateTime {
		$sql = "SELECT MAX(`{$this->getTableName()}`.`created`) FROM `{$this->getTableName()}` WHERE `user_id` = ?";
		$result = $this->execute($sql, [$userId]);
		$createdTime = $result->fetch(\PDO::FETCH_COLUMN);

		return ($createdTime === null) ? null : new \DateTime($createdTime);
	}

	public function latestUpdateTime(string $userId) : ?\DateTime {
		$sql = "SELECT MAX(`{$this->getTableName()}`.`updated`) FROM `{$this->getTableName()}` WHERE `user_id` = ?";
		$result = $this->execute($sql, [$userId]);
		$createdTime = $result->fetch(\PDO::FETCH_COLUMN);

		return ($createdTime === null) ? null : new \DateTime($createdTime);
	}

	/**
	 * helper creating a string like '(?,?,?)' with the specified number of elements
	 */
	protected function questionMarks(int $count) : string {
		$questionMarks = [];
		for ($i = 0; $i < $count; $i++) {
			$questionMarks[] = '?';
		}
		return '(' . \implode(',', $questionMarks) . ')';
	}

	/**
	 * Build a SQL SELECT statement which selects all entities of the given user,
	 * and optionally applies other conditions, too.
	 * This is built upon `selectEntities` which may be overridden by the derived class.
	 * @param string|null $condition Optional extra condition. This will get automatically
	 *                               prefixed with ' AND ', so don't include that.
	 * @param string|null $extension Any extension (e.g. ORDER BY, LIMIT) to be added after
	 *                               the conditions in the SQL statement
	 */
	protected function selectUserEntities(string $condition=null, string $extension=null) : string {
		$allConditions = "`{$this->getTableName()}`.`user_id` = ?";

		if (!empty($condition)) {
			$allConditions .= " AND $condition";
		}

		return $this->selectEntities($allConditions, $extension);
	}

	/**
	 * Build a SQL SELECT statement which selects all entities matching the given condition.
	 * The derived class may override this if necessary.
	 * @param string $condition This will get automatically prefixed with ' WHERE '
	 * @param string|null $extension Any extension (e.g. ORDER BY, LIMIT) to be added after
	 *                               the conditions in the SQL statement
	 */
	protected function selectEntities(string $condition, string $extension=null) : string {
		return "SELECT * FROM `{$this->getTableName()}` WHERE $condition $extension ";
	}

	/**
	 * @return array with two values: The SQL condition as string and the SQL parameters as string[]
	 */
	protected function formatTimestampConditions(?string $createdMin, ?string $createdMax, ?string $updatedMin, ?string $updatedMax) : array {
		$conditions = [];
		$params = [];

		if (!empty($createdMin)) {
			$conditions[] = "`{$this->getTableName()}`.`created` >= ?";
			$params[] = $createdMin;
		}

		if (!empty($createdMax)) {
			$conditions[] = "`{$this->getTableName()}`.`created` <= ?";
			$params[] = $createdMax;
		}

		if (!empty($updatedMin)) {
			$conditions[] = "`{$this->getTableName()}`.`updated` >= ?";
			$params[] = $updatedMin;
		}

		if (!empty($updatedMax)) {
			$conditions[] = "`{$this->getTableName()}`.`updated` <= ?";
			$params[] = $updatedMax;
		}

		return [\implode(' AND ', $conditions), $params];
	}

	/**
	 * Convert given sorting condition to an SQL clause. Derived class may overide this if necessary.
	 * @param int $sortBy One of the constants defined in the class SortBy
	 */
	protected function formatSortingClause(int $sortBy) : ?string {
		if ($sortBy == SortBy::Name) {
			return "ORDER BY LOWER(`{$this->getTableName()}`.`{$this->nameColumn}`)";
		} elseif ($sortBy == SortBy::Newest) {
			return "ORDER BY `{$this->getTableName()}`.`id` DESC"; // abuse the fact that IDs are ever-incrementing values
		} else {
			return null;
		}
	}

	protected static function prepareFuzzySearchString(string $input) : string {
		// possibly multiparted query enclosed in quotation marks is handled as a single substing,
		// while the default interpretation of multipart string is that each of the parts can be found
		// separately as substing in the given order
		if (Util::startsWith($input, '"') && Util::endsWith($input, '"')) {
			// remove the quotation
			$pattern = \substr($input, 1, -1);
		} else {
			// split to parts by whitespace
			$parts = \preg_split('/\s+/', $input, -1, PREG_SPLIT_NO_EMPTY);
			// glue the parts back together with a wildcard charater
			$pattern = \implode('%', $parts);
		}
		return "%$pattern%";
	}

	/**
	 * Find an entity which has the same identity as the supplied entity.
	 * How the identity of the entity is defined, depends on the derived concrete class.
	 */
	abstract protected function findUniqueEntity(Entity $entity) : Entity;
}


1			<?php declare(strict_types=1);
2
3			/**
4			* ownCloud - Music app
5			*
6			* This file is licensed under the Affero General Public License version 3 or
7			* later. See the COPYING file.
8			*
9			* @author Pauli Järvinen <[email protected]>
10			* @copyright Pauli Järvinen 2016 - 2021
11			*/
12
13			namespace OCA\Music\Db;
14
15			use \OCP\AppFramework\Db\DoesNotExistException;
16			use \OCP\AppFramework\Db\Entity;
17			use \OCP\AppFramework\Db\Mapper;
18			use \OCP\AppFramework\Db\MultipleObjectsReturnedException;
19			use \OCP\IDBConnection;
20
21			use \OCA\Music\AppFramework\Db\UniqueConstraintViolationException;
22			use \OCA\Music\Utility\Util;
23
24			/**
25			* Common base class for data access classes of the Music app
26			*/
27			abstract class BaseMapper extends Mapper {
28			const SQL_DATE_FORMAT = 'Y-m-d H:i:s.v';
29
30			protected $nameColumn;
31
32			public function __construct(IDBConnection $db, string $tableName, string $entityClass, string $nameColumn) {
33			parent::__construct($db, $tableName, $entityClass);
34			$this->nameColumn = $nameColumn;
35			}
36
37			/**
38			* Create an empty object of the entity class bound to this mapper
39			*/
40			public function createEntity() : Entity {
41			return new $this->entityClass();
42			}
43
44			/**
45			* Find a single entity by id and user_id
46			* @throws DoesNotExistException if the entity does not exist
47			* @throws MultipleObjectsReturnedException if more than one entity exists
48			*/
49			public function find(int $id, string $userId) : Entity {
50			$sql = $this->selectUserEntities("`{$this->getTableName()}`.`id` = ?");
51			return $this->findEntity($sql, [$userId, $id]);
52			}
53
54			/**
55			* Find all entities matching the given IDs. Specifying the owning user is optional.
56			* @param integer[] $ids IDs of the entities to be found
57			* @param string\|null $userId
58			* @return Entity[]
59			*/
60			public function findById(array $ids, string $userId=null) : array {
61			$count = \count($ids);
62			$condition = "`{$this->getTableName()}`.`id` IN ". $this->questionMarks($count);
63
64			if (empty($userId)) {
65			$sql = $this->selectEntities($condition);
66			} else {
67			$sql = $this->selectUserEntities($condition);
68			$ids = \array_merge([$userId], $ids);
69			}
70
71			return $this->findEntities($sql, $ids);
72			}
73
74			/**
75			* Find all user's entities
76			* @param string\|null $createdMin Optional minimum `created` timestamp.
77			* @param string\|null $createdMax Optional maximum `created` timestamp.
78			* @param string\|null $updatedMin Optional minimum `updated` timestamp.
79			* @param string\|null $updatedMax Optional maximum `updated` timestamp.
80			* @return Entity[]
81			*/
82			public function findAll(string $userId, int $sortBy=SortBy::None, int $limit=null, int $offset=null,
83			?string $createdMin=null, ?string $createdMax=null, ?string $updatedMin=null, ?string $updatedMax=null) : array {
84			$sorting = $this->formatSortingClause($sortBy);
85			[$condition, $params] = $this->formatTimestampConditions($createdMin, $createdMax, $updatedMin, $updatedMax);
86			$sql = $this->selectUserEntities($condition, $sorting);
87			\array_unshift($params, $userId);
88			return $this->findEntities($sql, $params, $limit, $offset);
89			}
90
91			/**
92			* Find all user's entities matching the given name
93			* @param string\|null $createdMin Optional minimum `created` timestamp.
94			* @param string\|null $createdMax Optional maximum `created` timestamp.
95			* @param string\|null $updatedMin Optional minimum `updated` timestamp.
96			* @param string\|null $updatedMax Optional maximum `updated` timestamp.
97			* @return Entity[]
98			*/
99			public function findAllByName(
100			?string $name, string $userId, bool $fuzzy=false, int $limit=null, int $offset=null,
101			?string $createdMin=null, ?string $createdMax=null, ?string $updatedMin=null, ?string $updatedMax=null) : array {
102
103			$nameCol = "`{$this->getTableName()}`.`{$this->nameColumn}`";
104			if ($name === null) {
105			$condition = "$nameCol IS NULL";
106			$params = [$userId];
107			} elseif ($fuzzy) {
108			$condition = "LOWER($nameCol) LIKE LOWER(?)";
109			$params = [$userId, self::prepareFuzzySearchString($name)];
110			} else {
111			$condition = "LOWER($nameCol) = LOWER(?)";
112			$params = [$userId, $name];
113			}
114
115			[$timestampConds, $timestampParams] = $this->formatTimestampConditions($createdMin, $createdMax, $updatedMin, $updatedMax);
116			if (!empty($timestampConds)) {
117			$condition .= ' AND ' . $timestampConds;
118			$params = \array_merge($params, $timestampParams);
119			}
120
121			$sql = $this->selectUserEntities($condition, "ORDER BY LOWER($nameCol)");
122
123			return $this->findEntities($sql, $params, $limit, $offset);
124			}
125
126			/**
127			* Find all user's starred entities
128			* @return Entity[]
129			*/
130			public function findAllStarred(string $userId, int $limit=null, int $offset=null) : array {
131			$sql = $this->selectUserEntities(
132			"`{$this->getTableName()}`.`starred` IS NOT NULL",
133			"ORDER BY LOWER(`{$this->getTableName()}`.`{$this->nameColumn}`)");
134			return $this->findEntities($sql, [$userId], $limit, $offset);
135			}
136
137			/**
138			* Find IDs of all user's entities of this kind
139			* @return int[]
140			*/
141			public function findAllIds(string $userId) : array {
142			$sql = "SELECT `id` FROM `{$this->getTableName()}` WHERE `user_id` = ?";
143			$result = $this->execute($sql, [$userId]);
144
145			return \array_map('intval', $result->fetchAll(\PDO::FETCH_COLUMN));
146			}
147
148			/**
149			* Find IDs of all users owning any entities of this mapper
150			* @return string[]
151			*/
152			public function findAllUsers() : array {
153			$sql = "SELECT DISTINCT(`user_id`) FROM `{$this->getTableName()}`";
154			$result = $this->execute($sql);
155
156			return $result->fetchAll(\PDO::FETCH_COLUMN);
157			}
158
159			/**
160			* Delete all entities with given IDs without specifying the user
161			* @param integer[] $ids IDs of the entities to be deleted
162			*/
163			public function deleteById(array $ids) : void {
164			$count = \count($ids);
165			if ($count === 0) {
166			return;
167			}
168			$this->deleteByCond('`id` IN ' . $this->questionMarks($count), $ids);
169			}
170
171			/**
172			* Delete all entities matching the given SQL condition
173			* @param string $condition SQL 'WHERE' condition (without the keyword 'WHERE')
174			* @param array $params SQL parameters for the condition
175			*/
176			protected function deleteByCond(string $condition, array $params) : void {
177			$sql = "DELETE FROM `{$this->getTableName()}` WHERE ". $condition;
178			$this->execute($sql, $params);
179			}
180
181			/**
182			* Delete all entities of the given user
183			*/
184			public function deleteAll(string $userId) : void {
185			$sql = "DELETE FROM `{$this->getTableName()}` WHERE `user_id` = ?";
186			$this->execute($sql, [$userId]);
187			}
188
189			/**
190			* Tests if entity with given ID and user ID exists in the database
191			*/
192			public function exists(int $id, string $userId) : bool {
193			$sql = "SELECT 1 FROM `{$this->getTableName()}` WHERE `id` = ? AND `user_id` = ?";
194			$result = $this->execute($sql, [$id, $userId]);
195			return $result->rowCount() > 0;
196			}
197
198			/**
199			* Count all entities of a user
200			*/
201			public function count(string $userId) : int {
202			$sql = "SELECT COUNT(*) AS count FROM `{$this->getTableName()}` WHERE `user_id` = ?";
203			$result = $this->execute($sql, [$userId]);
204			$row = $result->fetch();
205			return \intval($row['count']);
206			}
207
208			/**
209			* {@inheritDoc}
210			* @see \OCP\AppFramework\Db\Mapper::insert()
211			*/
212			public function insert(Entity $entity) : Entity {
213			$now = new \DateTime();
214			$nowStr = $now->format(self::SQL_DATE_FORMAT);
215			$entity->setCreated($nowStr);
216			$entity->setUpdated($nowStr);
217
218			try {
219			return parent::insert($entity);
220			} catch (\Doctrine\DBAL\Exception\UniqueConstraintViolationException $e) {
221			throw new UniqueConstraintViolationException($e->getMessage(), $e->getCode(), $e);
222			} catch (\OCP\DB\Exception $e) {
			0 ignored issues – show Bug introduced 2021-02-27 17:05 UTC by Report Bug Copy Issue Report The type `OCP\DB\Exception` was not found. Maybe you did not declare it correctly or list all dependencies? The issue could also be caused by a filter entry in the build configuration. If the path has been excluded in your configuration, e.g. `excluded_paths: ["lib/"]`, you can move it to the dependency path list as follows: filter: dependency_paths: ["lib/"] For further information see https://scrutinizer-ci.com/docs/tools/php/php-scrutinizer/#list-dependency-paths Loading history...
223			// Nextcloud 21
224			if ($e->getReason() == \OCP\DB\Exception::REASON_UNIQUE_CONSTRAINT_VIOLATION) {
225			throw new UniqueConstraintViolationException($e->getMessage(), $e->getCode(), $e);
226			} else {
227			throw $e;
228			}
229			}
230			}
231
232			/**
233			* {@inheritDoc}
234			* @see \OCP\AppFramework\Db\Mapper::update()
235			*/
236			public function update(Entity $entity) : Entity {
237			$now = new \DateTime();
238			$entity->setUpdated($now->format(self::SQL_DATE_FORMAT));
239			return parent::update($entity);
240			}
241
242			/**
243			* Insert an entity, or if an entity with the same identity already exists,
244			* update the existing entity.
245			* @return Entity The inserted or updated entity, containing also the id field
246			*/
247			public function insertOrUpdate(Entity $entity) : Entity {
248			try {
249			return $this->insert($entity);
250			} catch (UniqueConstraintViolationException $ex) {
251			$existingEntity = $this->findUniqueEntity($entity);
252			$entity->setId($existingEntity->getId());
253			$entity->setCreated($existingEntity->getCreated());
254			return $this->update($entity);
255			}
256			}
257
258			/**
259			* Set the "starred" column of the given entities
260			* @param \DateTime\|null $date
261			* @param integer[] $ids
262			* @param string $userId
263			* @return int number of modified entities
264			*/
265			public function setStarredDate(?\DateTime $date, array $ids, string $userId) : int {
266			$count = \count($ids);
267			if (!empty($date)) {
268			$date = $date->format(self::SQL_DATE_FORMAT);
269			}
270
271			$sql = "UPDATE `{$this->getTableName()}` SET `starred` = ?
272			WHERE `id` IN {$this->questionMarks($count)} AND `user_id` = ?";
273			$params = \array_merge([$date], $ids, [$userId]);
274			return $this->execute($sql, $params)->rowCount();
275			}
276
277			public function latestInsertTime(string $userId) : ?\DateTime {
278			$sql = "SELECT MAX(`{$this->getTableName()}`.`created`) FROM `{$this->getTableName()}` WHERE `user_id` = ?";
279			$result = $this->execute($sql, [$userId]);
280			$createdTime = $result->fetch(\PDO::FETCH_COLUMN);
281
282			return ($createdTime === null) ? null : new \DateTime($createdTime);
283			}
284
285			public function latestUpdateTime(string $userId) : ?\DateTime {
286			$sql = "SELECT MAX(`{$this->getTableName()}`.`updated`) FROM `{$this->getTableName()}` WHERE `user_id` = ?";
287			$result = $this->execute($sql, [$userId]);
288			$createdTime = $result->fetch(\PDO::FETCH_COLUMN);
289
290			return ($createdTime === null) ? null : new \DateTime($createdTime);
291			}
292
293			/**
294			* helper creating a string like '(?,?,?)' with the specified number of elements
295			*/
296			protected function questionMarks(int $count) : string {
297			$questionMarks = [];
298			for ($i = 0; $i < $count; $i++) {
299			$questionMarks[] = '?';
300			}
301			return '(' . \implode(',', $questionMarks) . ')';
302			}
303
304			/**
305			* Build a SQL SELECT statement which selects all entities of the given user,
306			* and optionally applies other conditions, too.
307			* This is built upon `selectEntities` which may be overridden by the derived class.
308			* @param string\|null $condition Optional extra condition. This will get automatically
309			* prefixed with ' AND ', so don't include that.
310			* @param string\|null $extension Any extension (e.g. ORDER BY, LIMIT) to be added after
311			* the conditions in the SQL statement
312			*/
313			protected function selectUserEntities(string $condition=null, string $extension=null) : string {
314			$allConditions = "`{$this->getTableName()}`.`user_id` = ?";
315
316			if (!empty($condition)) {
317			$allConditions .= " AND $condition";
318			}
319
320			return $this->selectEntities($allConditions, $extension);
321			}
322
323			/**
324			* Build a SQL SELECT statement which selects all entities matching the given condition.
325			* The derived class may override this if necessary.
326			* @param string $condition This will get automatically prefixed with ' WHERE '
327			* @param string\|null $extension Any extension (e.g. ORDER BY, LIMIT) to be added after
328			* the conditions in the SQL statement
329			*/
330			protected function selectEntities(string $condition, string $extension=null) : string {
331			return "SELECT * FROM `{$this->getTableName()}` WHERE $condition $extension ";
332			}
333
334			/**
335			* @return array with two values: The SQL condition as string and the SQL parameters as string[]
336			*/
337			protected function formatTimestampConditions(?string $createdMin, ?string $createdMax, ?string $updatedMin, ?string $updatedMax) : array {
338			$conditions = [];
339			$params = [];
340
341			if (!empty($createdMin)) {
342			$conditions[] = "`{$this->getTableName()}`.`created` >= ?";
343			$params[] = $createdMin;
344			}
345
346			if (!empty($createdMax)) {
347			$conditions[] = "`{$this->getTableName()}`.`created` <= ?";
348			$params[] = $createdMax;
349			}
350
351			if (!empty($updatedMin)) {
352			$conditions[] = "`{$this->getTableName()}`.`updated` >= ?";
353			$params[] = $updatedMin;
354			}
355
356			if (!empty($updatedMax)) {
357			$conditions[] = "`{$this->getTableName()}`.`updated` <= ?";
358			$params[] = $updatedMax;
359			}
360
361			return [\implode(' AND ', $conditions), $params];
362			}
363
364			/**
365			* Convert given sorting condition to an SQL clause. Derived class may overide this if necessary.
366			* @param int $sortBy One of the constants defined in the class SortBy
367			*/
368			protected function formatSortingClause(int $sortBy) : ?string {
369			if ($sortBy == SortBy::Name) {
370			return "ORDER BY LOWER(`{$this->getTableName()}`.`{$this->nameColumn}`)";
371			} elseif ($sortBy == SortBy::Newest) {
372			return "ORDER BY `{$this->getTableName()}`.`id` DESC"; // abuse the fact that IDs are ever-incrementing values
373			} else {
374			return null;
375			}
376			}
377
378			protected static function prepareFuzzySearchString(string $input) : string {
379			// possibly multiparted query enclosed in quotation marks is handled as a single substing,
380			// while the default interpretation of multipart string is that each of the parts can be found
381			// separately as substing in the given order
382			if (Util::startsWith($input, '"') && Util::endsWith($input, '"')) {
383			// remove the quotation
384			$pattern = \substr($input, 1, -1);
385			} else {
386			// split to parts by whitespace
387			$parts = \preg_split('/\s+/', $input, -1, PREG_SPLIT_NO_EMPTY);
388			// glue the parts back together with a wildcard charater
389			$pattern = \implode('%', $parts);
390			}
391			return "%$pattern%";
392			}
393
394			/**
395			* Find an entity which has the same identity as the supplied entity.
396			* How the identity of the entity is defined, depends on the derived concrete class.
397			*/
398			abstract protected function findUniqueEntity(Entity $entity) : Entity;
399			}
400

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