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<?php |
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/** |
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* components |
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* |
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* @author Wolfy-J |
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*/ |
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namespace Spiral\Migrations; |
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use Spiral\Core\Component; |
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use Spiral\Database\Schemas\Prototypes\AbstractTable; |
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use Spiral\Migrations\Atomizer\RendererInterface; |
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use Spiral\Reactor\Body\Source; |
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use Spiral\Support\DFSSorter; |
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/** |
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* Atomizer provides ability to convert given AbstractTables and their changes into set of |
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* migration commands. |
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*/ |
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class Atomizer extends Component |
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{ |
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/** |
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* Render changes into source. |
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* |
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* @var RendererInterface |
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*/ |
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private $renderer; |
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/** |
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* @var AbstractTable[] |
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*/ |
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protected $tables = []; |
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/** |
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* @param RendererInterface $renderer |
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*/ |
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public function __construct(RendererInterface $renderer) |
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{ |
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$this->renderer = $renderer; |
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} |
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/** |
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* Add new table into atomizer. |
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* |
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* @param AbstractTable $table |
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* |
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* @return Atomizer |
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*/ |
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public function addTable(AbstractTable $table): self |
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{ |
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$this->tables[] = $table; |
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return $this; |
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} |
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/** |
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* Get all atomizer tables. |
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* |
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* @return AbstractTable[] |
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*/ |
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public function getTables(): array |
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{ |
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return $this->tables; |
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} |
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/** |
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* Generate set of commands needed to describe migration (up command). |
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* |
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* @param Source $source |
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*/ |
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public function declareChanges(Source $source) |
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{ |
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foreach ($this->sortedTables() as $table) { |
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if (!$table->getComparator()->hasChanges()) { |
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continue; |
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} |
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//New operations block |
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$this->declareBlock($source); |
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if (!$table->exists()) { |
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$this->renderer->createTable($source, $table); |
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} else { |
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$this->renderer->updateTable($source, $table); |
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} |
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} |
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} |
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/** |
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* Generate set of lines needed to rollback migration (down command). |
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* |
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* @param Source $source |
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*/ |
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public function revertChanges(Source $source) |
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{ |
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foreach ($this->sortedTables(true) as $table) { |
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if (!$table->getComparator()->hasChanges()) { |
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continue; |
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} |
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//New operations block |
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$this->declareBlock($source); |
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if (!$table->exists()) { |
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$this->renderer->dropTable($source, $table); |
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} else { |
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$this->renderer->revertTable($source, $table); |
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} |
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} |
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} |
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/** |
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* Tables sorted in order of their dependecies. |
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* |
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* @param bool $reverse |
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* |
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* @return AbstractTable[] |
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*/ |
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protected function sortedTables($reverse = false) |
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{ |
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/* |
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* Tables has to be sorted using topological graph to execute operations in a valid order. |
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*/ |
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$sorter = new DFSSorter(); |
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foreach ($this->tables as $table) { |
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$sorter->addItem($table->getName(), $table, $table->getDependencies()); |
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} |
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$tables = $sorter->sort(); |
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if ($reverse) { |
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return array_reverse($tables); |
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} |
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return $tables; |
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} |
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/** |
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* Add spacing between commands, only if required. |
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* |
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* @param Source $source |
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*/ |
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private function declareBlock(Source $source) |
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{ |
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if (!empty($source->getLines())) { |
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$source->addLine(""); |
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} |
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} |
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} |
spiral /
components
