| Total Complexity | 78 |
| Total Lines | 502 |
| Duplicated Lines | 0 % |
| Changes | 3 | ||
| Bugs | 0 | Features | 0 |
Complex classes like BaseMapper often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes.
Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.
While breaking up the class, it is a good idea to analyze how other classes use BaseMapper, and based on these observations, apply Extract Interface, too.
| 1 | <?php declare(strict_types=1); |
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| 29 | abstract class BaseMapper extends CompatibleMapper { |
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| 30 | const SQL_DATE_FORMAT = 'Y-m-d H:i:s.v'; |
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| 31 | |||
| 32 | protected $nameColumn; |
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| 33 | /** @phpstan-var class-string<EntityType> $entityClass */ |
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| 34 | protected $entityClass; |
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| 35 | |||
| 36 | /** |
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| 37 | * @phpstan-param class-string<EntityType> $entityClass |
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| 38 | */ |
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| 39 | public function __construct(IDBConnection $db, string $tableName, string $entityClass, string $nameColumn) { |
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| 40 | parent::__construct($db, $tableName, $entityClass); |
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| 41 | $this->nameColumn = $nameColumn; |
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| 42 | // eclipse the base class property to help phpstan |
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| 43 | $this->entityClass = $entityClass; |
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| 44 | } |
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| 45 | |||
| 46 | /** |
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| 47 | * Create an empty object of the entity class bound to this mapper |
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| 48 | * @phpstan-return EntityType |
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| 49 | */ |
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| 50 | public function createEntity() : Entity { |
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| 51 | return new $this->entityClass(); |
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| 52 | } |
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| 53 | |||
| 54 | /** |
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| 55 | * Find a single entity by id and user_id |
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| 56 | * @throws DoesNotExistException if the entity does not exist |
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| 57 | * @throws MultipleObjectsReturnedException if more than one entity exists |
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| 58 | * @phpstan-return EntityType |
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| 59 | */ |
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| 60 | public function find(int $id, string $userId) : Entity { |
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| 61 | $sql = $this->selectUserEntities("`{$this->getTableName()}`.`id` = ?"); |
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| 62 | return $this->findEntity($sql, [$userId, $id]); |
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| 63 | } |
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| 64 | |||
| 65 | /** |
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| 66 | * Find all entities matching the given IDs. Specifying the owning user is optional. |
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| 67 | * @param integer[] $ids IDs of the entities to be found |
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| 68 | * @param string|null $userId |
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| 69 | * @return Entity[] |
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| 70 | * @phpstan-return EntityType[] |
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| 71 | */ |
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| 72 | public function findById(array $ids, string $userId=null) : array { |
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| 84 | } |
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| 85 | |||
| 86 | /** |
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| 87 | * Find all user's entities |
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| 88 | * @param string|null $createdMin Optional minimum `created` timestamp. |
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| 89 | * @param string|null $createdMax Optional maximum `created` timestamp. |
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| 90 | * @param string|null $updatedMin Optional minimum `updated` timestamp. |
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| 91 | * @param string|null $updatedMax Optional maximum `updated` timestamp. |
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| 92 | * @return Entity[] |
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| 93 | * @phpstan-return EntityType[] |
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| 94 | */ |
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| 95 | public function findAll(string $userId, int $sortBy=SortBy::None, int $limit=null, int $offset=null, |
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| 96 | ?string $createdMin=null, ?string $createdMax=null, ?string $updatedMin=null, ?string $updatedMax=null) : array { |
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| 97 | $sorting = $this->formatSortingClause($sortBy); |
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| 98 | [$condition, $params] = $this->formatTimestampConditions($createdMin, $createdMax, $updatedMin, $updatedMax); |
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| 99 | $sql = $this->selectUserEntities($condition, $sorting); |
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| 100 | \array_unshift($params, $userId); |
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| 101 | return $this->findEntities($sql, $params, $limit, $offset); |
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| 102 | } |
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| 103 | |||
| 104 | /** |
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| 105 | * Find all user's entities matching the given name |
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| 106 | * @param string|null $createdMin Optional minimum `created` timestamp. |
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| 107 | * @param string|null $createdMax Optional maximum `created` timestamp. |
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| 108 | * @param string|null $updatedMin Optional minimum `updated` timestamp. |
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| 109 | * @param string|null $updatedMax Optional maximum `updated` timestamp. |
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| 110 | * @return Entity[] |
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| 111 | * @phpstan-return EntityType[] |
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| 112 | */ |
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| 113 | public function findAllByName( |
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| 143 | } |
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| 144 | |||
| 145 | /** |
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| 146 | * Find all user's starred entities. It is safe to call this also on entity types |
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| 147 | * not supporting starring in which case an empty array will be returned. |
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| 148 | * @return Entity[] |
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| 149 | * @phpstan-return EntityType[] |
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| 150 | */ |
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| 151 | public function findAllStarred(string $userId, int $limit=null, int $offset=null) : array { |
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| 159 | } |
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| 160 | } |
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| 161 | |||
| 162 | /** |
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| 163 | * Find all entities matching multiple criteria, as needed for the Ampache API method `advanced_search` |
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| 164 | * @param string $conjunction Operator to use between the rules, either 'and' or 'or' |
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| 165 | * @param array $rules Array of arrays: [['rule' => string, 'operator' => string, 'input' => string], ...] |
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| 166 | * Here, 'rule' has dozens of possible values depending on the business layer in question |
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| 167 | * (see https://ampache.org/api/api-advanced-search#available-search-rules, alias names not supported here), |
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| 168 | * 'operator' is one of ['contain', 'notcontain', 'start', 'end', 'is', 'isnot', '>=', '<=', '=', '!=', '>', '<', 'true', 'false'], |
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| 169 | * 'input' is the right side value of the 'operator' (disregarded for the operators 'true' and 'false') |
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| 170 | * @return Entity[] |
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| 171 | * @phpstan-return EntityType[] |
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| 172 | */ |
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| 173 | public function findAllAdvanced(string $conjunction, array $rules, string $userId, ?int $limit=null, ?int $offset=null) : array { |
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| 174 | $sqlConditions = []; |
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| 175 | $sqlParams = [$userId]; |
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| 176 | |||
| 177 | foreach ($rules as $rule) { |
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| 178 | list('op' => $sqlOp, 'param' => $param) = $this->advFormatSqlOperator($rule['operator'], $rule['input']); |
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| 179 | $sqlConditions[] = $this->advFormatSqlCondition($rule['rule'], $sqlOp); |
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| 180 | if ($param !== null) { |
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| 181 | $sqlParams[] = $param; |
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| 182 | } |
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| 183 | } |
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| 184 | $sqlConditions = \implode(" $conjunction ", $sqlConditions); |
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| 185 | |||
| 186 | $sql = $this->selectUserEntities($sqlConditions, "ORDER BY LOWER(`{$this->getTableName()}`.`{$this->nameColumn}`)"); |
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| 187 | return $this->findEntities($sql, $sqlParams, $limit, $offset); |
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| 188 | } |
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| 189 | |||
| 190 | /** |
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| 191 | * Find IDs of all user's entities of this kind |
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| 192 | * @return int[] |
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| 193 | */ |
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| 194 | public function findAllIds(string $userId) : array { |
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| 195 | $sql = "SELECT `id` FROM `{$this->getTableName()}` WHERE `user_id` = ?"; |
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| 196 | $result = $this->execute($sql, [$userId]); |
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| 197 | |||
| 198 | return \array_map('intval', $result->fetchAll(\PDO::FETCH_COLUMN)); |
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| 199 | } |
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| 200 | |||
| 201 | /** |
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| 202 | * Find IDs of all users owning any entities of this mapper |
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| 203 | * @return string[] |
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| 204 | */ |
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| 205 | public function findAllUsers() : array { |
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| 206 | $sql = "SELECT DISTINCT(`user_id`) FROM `{$this->getTableName()}`"; |
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| 207 | $result = $this->execute($sql); |
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| 208 | |||
| 209 | return $result->fetchAll(\PDO::FETCH_COLUMN); |
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| 210 | } |
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| 211 | |||
| 212 | /** |
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| 213 | * Delete all entities with given IDs without specifying the user |
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| 214 | * @param integer[] $ids IDs of the entities to be deleted |
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| 215 | */ |
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| 216 | public function deleteById(array $ids) : void { |
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| 217 | $count = \count($ids); |
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| 218 | if ($count === 0) { |
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| 219 | return; |
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| 220 | } |
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| 221 | $this->deleteByCond('`id` IN ' . $this->questionMarks($count), $ids); |
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| 222 | } |
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| 223 | |||
| 224 | /** |
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| 225 | * Delete all entities matching the given SQL condition |
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| 226 | * @param string $condition SQL 'WHERE' condition (without the keyword 'WHERE') |
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| 227 | * @param array $params SQL parameters for the condition |
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| 228 | */ |
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| 229 | protected function deleteByCond(string $condition, array $params) : void { |
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| 230 | $sql = "DELETE FROM `{$this->getTableName()}` WHERE ". $condition; |
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| 231 | $this->execute($sql, $params); |
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| 232 | } |
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| 233 | |||
| 234 | /** |
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| 235 | * Delete all entities of the given user |
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| 236 | */ |
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| 237 | public function deleteAll(string $userId) : void { |
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| 238 | $sql = "DELETE FROM `{$this->getTableName()}` WHERE `user_id` = ?"; |
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| 239 | $this->execute($sql, [$userId]); |
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| 240 | } |
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| 241 | |||
| 242 | /** |
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| 243 | * Tests if entity with given ID and user ID exists in the database |
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| 244 | */ |
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| 245 | public function exists(int $id, string $userId) : bool { |
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| 246 | $sql = "SELECT 1 FROM `{$this->getTableName()}` WHERE `id` = ? AND `user_id` = ?"; |
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| 247 | $result = $this->execute($sql, [$id, $userId]); |
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| 248 | return $result->rowCount() > 0; |
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| 249 | } |
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| 250 | |||
| 251 | /** |
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| 252 | * Count all entities of a user |
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| 253 | */ |
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| 254 | public function count(string $userId) : int { |
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| 255 | $sql = "SELECT COUNT(*) AS count FROM `{$this->getTableName()}` WHERE `user_id` = ?"; |
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| 256 | $result = $this->execute($sql, [$userId]); |
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| 257 | $row = $result->fetch(); |
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| 258 | return \intval($row['count']); |
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| 259 | } |
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| 260 | |||
| 261 | /** |
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| 262 | * {@inheritDoc} |
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| 263 | * @see CompatibleMapper::insert() |
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| 264 | * @phpstan-param EntityType $entity |
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| 265 | * @phpstan-return EntityType |
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| 266 | */ |
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| 267 | public function insert(\OCP\AppFramework\Db\Entity $entity) : \OCP\AppFramework\Db\Entity { |
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| 268 | $now = new \DateTime(); |
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| 269 | $nowStr = $now->format(self::SQL_DATE_FORMAT); |
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| 270 | $entity->setCreated($nowStr); |
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| 271 | $entity->setUpdated($nowStr); |
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| 272 | |||
| 273 | try { |
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| 274 | return parent::insert($entity); // @phpstan-ignore-line: no way to tell phpstan that the parent uses the template type |
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| 275 | } catch (\Doctrine\DBAL\Exception\UniqueConstraintViolationException $e) { |
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| 276 | throw new UniqueConstraintViolationException($e->getMessage(), $e->getCode(), $e); |
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| 277 | } catch (\OCP\DB\Exception $e) { |
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| 278 | // Nextcloud 21+ |
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| 279 | if ($e->getReason() == \OCP\DB\Exception::REASON_UNIQUE_CONSTRAINT_VIOLATION) { |
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| 280 | throw new UniqueConstraintViolationException($e->getMessage(), $e->getCode(), $e); |
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| 281 | } else { |
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| 282 | throw $e; |
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| 283 | } |
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| 284 | } |
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| 285 | } |
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| 286 | |||
| 287 | /** |
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| 288 | * {@inheritDoc} |
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| 289 | * @see CompatibleMapper::update() |
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| 290 | * @phpstan-param EntityType $entity |
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| 291 | * @phpstan-return EntityType |
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| 292 | */ |
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| 293 | public function update(\OCP\AppFramework\Db\Entity $entity) : \OCP\AppFramework\Db\Entity { |
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| 294 | $now = new \DateTime(); |
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| 295 | $entity->setUpdated($now->format(self::SQL_DATE_FORMAT)); |
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| 296 | return parent::update($entity); // @phpstan-ignore-line: no way to tell phpstan that the parent uses the template type |
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| 297 | } |
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| 298 | |||
| 299 | /** |
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| 300 | * Insert an entity, or if an entity with the same identity already exists, |
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| 301 | * update the existing entity. |
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| 302 | * Note: The functions insertOrUpate and updateOrInsert get the exactly same thing done. The only difference is |
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| 303 | * that the former is optimized for cases where the entity doens't exist and the latter for cases where it does exist. |
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| 304 | * @return Entity The inserted or updated entity, containing also the id field |
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| 305 | * @phpstan-param EntityType $entity |
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| 306 | * @phpstan-return EntityType |
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| 307 | */ |
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| 308 | public function insertOrUpdate(Entity $entity) : Entity { |
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| 309 | try { |
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| 310 | return $this->insert($entity); |
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| 311 | } catch (UniqueConstraintViolationException $ex) { |
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| 312 | $existingEntity = $this->findUniqueEntity($entity); |
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| 313 | $entity->setId($existingEntity->getId()); |
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| 314 | $entity->setCreated($existingEntity->getCreated()); |
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| 315 | return $this->update($entity); |
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| 316 | } |
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| 317 | } |
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| 318 | |||
| 319 | /** |
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| 320 | * Update an entity whose unique constraint fields match the given entity. If such entity is not found, |
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| 321 | * a new entity is inserted. |
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| 322 | * Note: The functions insertOrUpate and updateOrInsert get the exactly same thing done. The only difference is |
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| 323 | * that the former is optimized for cases where the entity doens't exist and the latter for cases where it does exist. |
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| 324 | * @return Entity The inserted or updated entity, containing also the id field |
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| 325 | * @phpstan-param EntityType $entity |
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| 326 | * @phpstan-return EntityType |
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| 327 | */ |
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| 328 | public function updateOrInsert(Entity $entity) : Entity { |
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| 329 | try { |
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| 330 | $existingEntity = $this->findUniqueEntity($entity); |
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| 331 | $entity->setId($existingEntity->getId()); |
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| 332 | return $this->update($entity); |
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| 333 | } catch (DoesNotExistException $ex) { |
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| 334 | try { |
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| 335 | return $this->insert($entity); |
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| 336 | } catch (UniqueConstraintViolationException $ex) { |
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| 337 | // the conflicting entry didn't exist an eyeblink ago but now it does |
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| 338 | // => this is essentially a concurrent update and it is anyway non-deterministic, which |
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| 339 | // update happens last; cancel this update |
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| 340 | return $this->findUniqueEntity($entity); |
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| 341 | } |
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| 342 | } |
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| 343 | } |
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| 344 | |||
| 345 | /** |
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| 346 | * Set the "starred" column of the given entities |
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| 347 | * @param \DateTime|null $date |
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| 348 | * @param integer[] $ids |
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| 349 | * @param string $userId |
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| 350 | * @return int number of modified entities |
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| 351 | */ |
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| 352 | public function setStarredDate(?\DateTime $date, array $ids, string $userId) : int { |
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| 353 | $count = \count($ids); |
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| 354 | if (!empty($date)) { |
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| 355 | $date = $date->format(self::SQL_DATE_FORMAT); |
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| 356 | } |
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| 357 | |||
| 358 | $sql = "UPDATE `{$this->getTableName()}` SET `starred` = ? |
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| 359 | WHERE `id` IN {$this->questionMarks($count)} AND `user_id` = ?"; |
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| 360 | $params = \array_merge([$date], $ids, [$userId]); |
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| 361 | return $this->execute($sql, $params)->rowCount(); |
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| 362 | } |
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| 363 | |||
| 364 | public function latestInsertTime(string $userId) : ?\DateTime { |
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| 365 | $sql = "SELECT MAX(`{$this->getTableName()}`.`created`) FROM `{$this->getTableName()}` WHERE `user_id` = ?"; |
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| 366 | $result = $this->execute($sql, [$userId]); |
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| 367 | $createdTime = $result->fetch(\PDO::FETCH_COLUMN); |
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| 368 | |||
| 369 | return ($createdTime === null) ? null : new \DateTime($createdTime); |
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| 370 | } |
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| 371 | |||
| 372 | public function latestUpdateTime(string $userId) : ?\DateTime { |
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| 378 | } |
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| 379 | |||
| 380 | /** |
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| 381 | * helper creating a string like '(?,?,?)' with the specified number of elements |
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| 382 | */ |
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| 383 | protected function questionMarks(int $count) : string { |
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| 384 | $questionMarks = []; |
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| 385 | for ($i = 0; $i < $count; $i++) { |
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| 386 | $questionMarks[] = '?'; |
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| 387 | } |
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| 388 | return '(' . \implode(',', $questionMarks) . ')'; |
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| 389 | } |
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| 390 | |||
| 391 | /** |
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| 392 | * Build a SQL SELECT statement which selects all entities of the given user, |
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| 393 | * and optionally applies other conditions, too. |
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| 394 | * This is built upon `selectEntities` which may be overridden by the derived class. |
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| 395 | * @param string|null $condition Optional extra condition. This will get automatically |
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| 396 | * prefixed with ' AND ', so don't include that. |
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| 397 | * @param string|null $extension Any extension (e.g. ORDER BY, LIMIT) to be added after |
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| 398 | * the conditions in the SQL statement |
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| 399 | */ |
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| 400 | protected function selectUserEntities(string $condition=null, string $extension=null) : string { |
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| 401 | $allConditions = "`{$this->getTableName()}`.`user_id` = ?"; |
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| 402 | |||
| 403 | if (!empty($condition)) { |
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| 404 | $allConditions .= " AND $condition"; |
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| 405 | } |
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| 406 | |||
| 407 | return $this->selectEntities($allConditions, $extension); |
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| 408 | } |
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| 409 | |||
| 410 | /** |
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| 411 | * Build a SQL SELECT statement which selects all entities matching the given condition. |
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| 412 | * The derived class may override this if necessary. |
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| 413 | * @param string $condition This will get automatically prefixed with ' WHERE ' |
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| 414 | * @param string|null $extension Any extension (e.g. ORDER BY, LIMIT) to be added after |
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| 415 | * the conditions in the SQL statement |
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| 416 | */ |
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| 417 | protected function selectEntities(string $condition, string $extension=null) : string { |
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| 418 | return "SELECT * FROM `{$this->getTableName()}` WHERE $condition $extension "; |
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| 419 | } |
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| 420 | |||
| 421 | /** |
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| 422 | * @return array with two values: The SQL condition as string and the SQL parameters as string[] |
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| 423 | */ |
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| 424 | protected function formatTimestampConditions(?string $createdMin, ?string $createdMax, ?string $updatedMin, ?string $updatedMax) : array { |
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| 425 | $conditions = []; |
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| 426 | $params = []; |
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| 427 | |||
| 428 | if (!empty($createdMin)) { |
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| 429 | $conditions[] = "`{$this->getTableName()}`.`created` >= ?"; |
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| 430 | $params[] = $createdMin; |
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| 431 | } |
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| 432 | |||
| 433 | if (!empty($createdMax)) { |
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| 434 | $conditions[] = "`{$this->getTableName()}`.`created` <= ?"; |
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| 435 | $params[] = $createdMax; |
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| 436 | } |
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| 437 | |||
| 438 | if (!empty($updatedMin)) { |
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| 439 | $conditions[] = "`{$this->getTableName()}`.`updated` >= ?"; |
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| 440 | $params[] = $updatedMin; |
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| 441 | } |
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| 442 | |||
| 443 | if (!empty($updatedMax)) { |
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| 444 | $conditions[] = "`{$this->getTableName()}`.`updated` <= ?"; |
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| 445 | $params[] = $updatedMax; |
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| 446 | } |
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| 447 | |||
| 448 | return [\implode(' AND ', $conditions), $params]; |
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| 449 | } |
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| 450 | |||
| 451 | /** |
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| 452 | * Convert given sorting condition to an SQL clause. Derived class may overide this if necessary. |
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| 453 | * @param int $sortBy One of the constants defined in the class SortBy |
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| 454 | */ |
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| 455 | protected function formatSortingClause(int $sortBy, bool $invertSort = false) : ?string { |
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| 456 | if ($sortBy == SortBy::Name) { |
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| 457 | $dir = $invertSort ? 'DESC' : 'ASC'; |
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| 458 | return "ORDER BY LOWER(`{$this->getTableName()}`.`{$this->nameColumn}`) $dir"; |
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| 459 | } elseif ($sortBy == SortBy::Newest) { |
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| 460 | $dir = $invertSort ? 'ASC' : 'DESC'; |
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| 461 | return "ORDER BY `{$this->getTableName()}`.`id` $dir"; // abuse the fact that IDs are ever-incrementing values |
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| 462 | } else { |
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| 463 | return null; |
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| 464 | } |
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| 465 | } |
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| 466 | |||
| 467 | protected static function prepareSubstringSearchPattern(string $input) : string { |
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| 481 | } |
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| 482 | |||
| 483 | /** |
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| 484 | * Format SQL operator and parameter matching the given advanced search operator. |
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| 485 | * @return array like ['op' => string, 'param' => string] |
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| 486 | */ |
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| 487 | protected function advFormatSqlOperator(string $ruleOperator, string $ruleInput) { |
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| 488 | switch ($ruleOperator) { |
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| 489 | case 'contain': return ['op' => 'LIKE', 'param' => "%$ruleInput%"]; |
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| 490 | case 'notcontain': return ['op' => 'NOT LIKE', 'param' => "%$ruleInput%"]; |
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| 491 | case 'start': return ['op' => 'LIKE', 'param' => "$ruleInput%"]; |
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| 492 | case 'end': return ['op' => 'LIKE', 'param' => "%$ruleInput"]; |
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| 493 | case 'is': return ['op' => '=', 'param' => "$ruleInput"]; |
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| 494 | case 'isnot': return ['op' => '!=', 'param' => "$ruleInput"]; |
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| 495 | case 'sounds': return ['op' => 'SOUNDS LIKE', 'param' => $ruleInput]; // MySQL-specific syntax |
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| 496 | case 'notsounds': return ['op' => 'NOT SOUNDS LIKE', 'param' => $ruleInput]; // MySQL-specific syntax |
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| 497 | case 'regexp': return ['op' => 'REGEXP', 'param' => $ruleInput]; // MySQL-specific syntax |
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| 498 | case 'notregexp': return ['op' => 'NOT REGEXP', 'param' => $ruleInput]; // MySQL-specific syntax |
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| 499 | case 'true': return ['op' => 'IS NOT NULL', 'param' => null]; |
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| 500 | case 'false': return ['op' => 'IS NULL', 'param' => null]; |
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| 501 | default: return ['op' => $ruleOperator, 'param' => $ruleInput]; // all numerical operators fall here |
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| 502 | } |
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| 503 | } |
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| 504 | |||
| 505 | /** |
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| 506 | * Format SQL condition matching the given advanced search rule and SQL operator. |
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| 507 | * Derived classes should override this to provide support for table-specific rules. |
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| 508 | */ |
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| 509 | protected function advFormatSqlCondition(string $rule, string $sqlOp) : string { |
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| 521 | } |
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| 522 | } |
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| 523 | |||
| 524 | /** |
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| 525 | * Find an entity which has the same identity as the supplied entity. |
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| 526 | * How the identity of the entity is defined, depends on the derived concrete class. |
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| 527 | * @phpstan-param EntityType $entity |
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| 528 | * @phpstan-return EntityType |
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| 529 | */ |
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| 530 | abstract protected function findUniqueEntity(Entity $entity) : Entity; |
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| 531 | } |
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| 532 |