src/BaseRepository.php

   1 <?php
   2 /**
   3  * @copyright Copyright (C) 2020, Friendica
   4  *
   5  * @license GNU AGPL version 3 or any later version
   6  *
   7  * This program is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU Affero General Public License as
   9  * published by the Free Software Foundation, either version 3 of the
  10  * License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU Affero General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Affero General Public License
  18  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  19  *
  20  */
  21
  22 namespace Friendica;
  23
  24 use Friendica\Database\Database;
  25 use Friendica\Database\DBA;
  26 use Friendica\Network\HTTPException;
  27 use Psr\Log\LoggerInterface;
  28
  29 /**
  30  * Repositories are Factories linked to one or more database tables.
  31  *
  32  * @see BaseModel
  33  * @see BaseCollection
  34  */
  35 abstract class BaseRepository extends BaseFactory
  36 {
  37         const LIMIT = 30;
  38
  39         /** @var Database */
  40         protected $dba;
  41
  42         /** @var string */
  43         protected static $table_name;
  44
  45         /** @var BaseModel */
  46         protected static $model_class;
  47
  48         /** @var BaseCollection */
  49         protected static $collection_class;
  50
  51         public function __construct(Database $dba, LoggerInterface $logger)
  52         {
  53                 parent::__construct($logger);
  54
  55                 $this->dba = $dba;
  56                 $this->logger = $logger;
  57         }
  58
  59         /**
  60          * Fetches a single model record. The condition array is expected to contain a unique index (primary or otherwise).
  61          *
  62          * Chainable.
  63          *
  64          * @param array $condition
  65          * @return BaseModel
  66          * @throws HTTPException\NotFoundException
  67          */
  68         public function selectFirst(array $condition)
  69         {
  70                 $data = $this->dba->selectFirst(static::$table_name, [], $condition);
  71
  72                 if (!$data) {
  73                         throw new HTTPException\NotFoundException(static::class . ' record not found.');
  74                 }
  75
  76                 return $this->create($data);
  77         }
  78
  79         /**
  80          * Populates a Collection according to the condition.
  81          *
  82          * Chainable.
  83          *
  84          * @param array $condition
  85          * @param array $params
  86          * @return BaseCollection
  87          * @throws \Exception
  88          */
  89         public function select(array $condition = [], array $params = [])
  90         {
  91                 $models = $this->selectModels($condition, $params);
  92
  93                 return new static::$collection_class($models);
  94         }
  95
  96         /**
  97          * Populates the collection according to the condition. Retrieves a limited subset of models depending on the boundaries
  98          * and the limit. The total count of rows matching the condition is stored in the collection.
  99          *
 100          * Chainable.
 101          *
 102          * @param array $condition
 103          * @param array $params
 104          * @param int?  $max_id
 105          * @param int?  $since_id
 106          * @param int   $limit
 107          * @return BaseCollection
 108          * @throws \Exception
 109          */
 110         public function selectByBoundaries(array $condition = [], array $params = [], int $max_id = null, int $since_id = null, int $limit = self::LIMIT)
 111         {
 112                 $condition = DBA::collapseCondition($condition);
 113
 114                 $boundCondition = $condition;
 115
 116                 if (isset($max_id)) {
 117                         $boundCondition[0] .= " AND `id` < ?";
 118                         $boundCondition[] = $max_id;
 119                 }
 120
 121                 if (isset($since_id)) {
 122                         $boundCondition[0] .= " AND `id` > ?";
 123                         $boundCondition[] = $since_id;
 124                 }
 125
 126                 $params['limit'] = $limit;
 127
 128                 $models = $this->selectModels($boundCondition, $params);
 129
 130                 $totalCount = DBA::count(static::$table_name, $condition);
 131
 132                 return new static::$collection_class($models, $totalCount);
 133         }
 134
 135         /**
 136          * This method updates the database row from the model.
 137          *
 138          * @param BaseModel $model
 139          * @return bool
 140          * @throws \Exception
 141          */
 142         public function update(BaseModel $model)
 143         {
 144                 if ($this->dba->update(static::$table_name, $model->toArray(), ['id' => $model->id], $model->getOriginalData())) {
 145                         $model->resetOriginalData();
 146                         return true;
 147                 }
 148
 149                 return false;
 150         }
 151
 152         /**
 153          * This method creates a new database row and returns a model if it was successful.
 154          *
 155          * @param array $fields
 156          * @return BaseModel|bool
 157          * @throws \Exception
 158          */
 159         public function insert(array $fields)
 160         {
 161                 $return = $this->dba->insert(static::$table_name, $fields);
 162
 163                 if (!$return) {
 164                         throw new HTTPException\InternalServerErrorException('Unable to insert new row in table "' . static::$table_name . '"');
 165                 }
 166
 167                 $fields['id'] = $this->dba->lastInsertId();
 168                 $return = $this->create($fields);
 169
 170                 return $return;
 171         }
 172
 173         /**
 174          * Deletes the model record from the database.
 175          *
 176          * @param BaseModel $model
 177          * @return bool
 178          * @throws \Exception
 179          */
 180         public function delete(BaseModel &$model)
 181         {
 182                 if ($success = $this->dba->delete(static::$table_name, ['id' => $model->id])) {
 183                         $model = null;
 184                 }
 185
 186                 return $success;
 187         }
 188
 189         /**
 190          * Base instantiation method, can be overriden to add specific dependencies
 191          *
 192          * @param array $data
 193          * @return BaseModel
 194          */
 195         protected function create(array $data)
 196         {
 197                 return new static::$model_class($this->dba, $this->logger, $data);
 198         }
 199
 200         /**
 201          * @param array $condition Query condition
 202          * @param array $params    Additional query parameters
 203          * @return BaseModel[]
 204          * @throws \Exception
 205          */
 206         protected function selectModels(array $condition, array $params = [])
 207         {
 208                 $result = $this->dba->select(static::$table_name, [], $condition, $params);
 209
 210                 /** @var BaseModel $prototype */
 211                 $prototype = null;
 212
 213                 $models = [];
 214
 215                 while ($record = $this->dba->fetch($result)) {
 216                         if ($prototype === null) {
 217                                 $prototype = $this->create($record);
 218                                 $models[] = $prototype;
 219                         } else {
 220                                 $models[] = static::$model_class::createFromPrototype($prototype, $record);
 221                         }
 222                 }
 223
 224                 return $models;
 225         }
 226
 227         /**
 228          * @param BaseCollection $collection
 229          */
 230         public function saveCollection(BaseCollection $collection)
 231         {
 232                 $collection->map([$this, 'update']);
 233         }
 234 }