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<?php |
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namespace Win\Repositories\Database; |
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use Win\Common\Pagination; |
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use Win\Models\Model; |
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use Win\Request\HttpException; |
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/** |
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* Object Relational Mapping |
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*/ |
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abstract class Orm |
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{ |
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/** @var string */ |
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const TABLE = ''; |
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/** @var string */ |
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const PK = 'id'; |
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/** @var Connection */ |
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public $conn; |
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/** @var Pagination */ |
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public $pagination; |
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/** @var Sql */ |
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protected $sql; |
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/** |
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* @param Model $model |
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* @return mixed[] |
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*/ |
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abstract public static function mapRow($model); |
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abstract public static function mapModel($row); |
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/** |
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* @param Connection $connection |
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*/ |
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public function __construct($connection = null) |
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{ |
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$this->conn = $connection ?: MysqlConnection::instance(); |
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$this->sql = new Sql(static::TABLE); |
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} |
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/** |
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* Prepara raw Sql |
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* @param string $query |
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* @param mixed[] |
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*/ |
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public function raw($query, ...$values) |
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{ |
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$this->sql = new Sql(static::TABLE, $values, $query); |
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return $this; |
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} |
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/** |
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* Executa SQL |
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* @param string $query |
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* @param mixed[] |
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*/ |
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public function execute($query, ...$values) |
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{ |
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return $this->conn->execute($query, $values); |
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} |
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/** |
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* Retorna o primeiro resultado da busca |
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* @return Model |
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*/ |
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public function one() |
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{ |
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$this->sql->setLimit(0, 1); |
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$query = $this->sql->select(); |
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$values = $this->sql->getValues(); |
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$row = $this->conn->fetch($query, $values); |
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$this->flush(); |
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return $this->mapModel($row); |
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} |
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/** |
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* Retorna o primeiro resultado da busca ou redireciona para Página 404 |
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*/ |
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public function oneOr404() |
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{ |
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$model = $this->one(); |
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if (is_null($model->id)) { |
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throw new HttpException('Model not found', 404); |
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} |
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return $model; |
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} |
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/** |
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* Retorna o registro pela PK |
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* @param int $id |
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*/ |
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public function find($id) |
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{ |
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return $this->filterBy(static::PK, $id)->one(); |
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} |
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/** |
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* Retorna o registro pela PK ou redireciona para Página 404 |
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* @param int $id |
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*/ |
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public function findOr404($id) |
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{ |
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return $this->filterBy(static::PK, $id)->oneOr404(); |
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} |
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/** |
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* Retorna o todos os resultados da busca |
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*/ |
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public function list() |
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{ |
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if ($this->pagination) { |
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$this->setLimit(); |
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} |
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$query = $this->sql->select(); |
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$values = $this->sql->getValues(); |
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$rows = $this->conn->fetchAll($query, $values); |
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$this->flush(); |
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return array_map([$this, 'mapModel'], $rows); |
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} |
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/** |
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* Retorna o total de resultados da busca |
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* @return int |
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*/ |
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public function count() |
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{ |
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$query = $this->sql->selectCount(); |
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$values = $this->sql->getValues(); |
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$count = $this->conn->fetchCount($query, $values); |
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$this->flush(); |
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return $count; |
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} |
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/** |
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* Remove todos os registros da busca |
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*/ |
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public function delete() |
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{ |
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$query = $this->sql->delete(); |
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$values = $this->sql->getValues(); |
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$this->conn->execute($query, $values); |
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$this->flush(); |
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} |
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/** |
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* Remove o registro pela PK |
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* @param int $id |
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*/ |
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public function destroy($id) |
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{ |
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$this->filterBy(static::PK, $id); |
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$query = $this->sql->delete(); |
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$values = $this->sql->getValues(); |
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$this->conn->execute($query, $values); |
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$this->flush(); |
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} |
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/** |
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* Salva o registro no banco |
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* @param Model $model |
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*/ |
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public function save(Model $model) |
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{ |
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$model->validate(); |
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if ($this->exists($model)) { |
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$this->update($model); |
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} else { |
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$this->insert($model); |
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}; |
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$this->flush(); |
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return $model; |
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} |
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/** |
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* Remove todos os filtros e ordenação |
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*/ |
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public function flush() |
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{ |
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$this->sql = new Sql(static::TABLE); |
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return $this; |
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} |
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/** |
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* @param Model $model |
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*/ |
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private function insert($model) |
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{ |
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$this->sql = new Sql(static::TABLE, $this->mapRow($model)); |
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$query = $this->sql->insert(); |
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$values = $this->sql->getValues(); |
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$this->conn->execute($query, $values); |
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$model->id = (int) $this->conn->getLastInsertId(); |
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} |
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/** |
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* @param Model $model |
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*/ |
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private function update($model) |
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{ |
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$this->sql = new Sql(static::TABLE, $this->mapRow($model)); |
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$this->filterBy(static::PK, $model->id); |
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$query = $this->sql->update(); |
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$values = $this->sql->getValues(); |
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$this->conn->execute($query, $values); |
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$this->flush(); |
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} |
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/** |
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* Retorna TRUE se o model existir no banco |
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* @return bool |
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*/ |
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protected function exists($model) |
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{ |
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$orm = new static($this->conn); |
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$orm->filterBy(static::PK, $model->id); |
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return $orm->count() > 0; |
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} |
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/** |
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* Aplica um filtro ($comparator aceita mais de uma regra) |
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* @param string $comparator |
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* @param mixed $value |
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* @example filterBy('name = ? AND email = ?', 'John', '[email protected]') |
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*/ |
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public function filterBy($comparator, ...$values) |
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{ |
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$this->sql->addWhere($comparator, ...$values); |
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return $this; |
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} |
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/** |
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* Ordem por um campo |
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* @param string $column |
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* @param string $mode 'ASC' | 'DESC' |
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* @param int $priority |
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*/ |
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public function sortBy($column, $mode = 'ASC', $priority = 0) |
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{ |
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$this->sql->addOrderBy($column . ' ' . $mode, $priority); |
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return $this; |
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} |
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public function sortNewest() |
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{ |
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return $this->sortBy(static::PK, 'DESC'); |
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} |
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public function sortOldest() |
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{ |
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return $this->sortBy(static::PK, 'ASC'); |
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} |
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public function sortRand() |
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{ |
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return $this->sortBy('RAND()'); |
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} |
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/** |
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* Define um limite das buscas com list() |
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* @param int $pageSize |
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* @param int $currentPage |
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*/ |
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public function paginate($pageSize, $currentPage = 1) |
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{ |
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$this->pagination = new Pagination($pageSize, $currentPage); |
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return $this; |
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} |
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/** |
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* Define o limit com base na paginação |
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*/ |
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private function setLimit() |
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{ |
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$query = $this->sql->selectCount(); |
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$values = $this->sql->getValues(); |
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$count = $this->conn->fetchCount($query, $values); |
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if ($count) { |
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$this->pagination->setCount($count); |
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$this->sql->setLimit($this->pagination->offset, $this->pagination->pageSize); |
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} |
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} |
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} |
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