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schema manager - schema browser, transaction support, conditions
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,110 @@ | ||
| <?php | ||
|
|
||
| declare(strict_types=1); | ||
|
|
||
| namespace MakinaCorpus\QueryBuilder\Schema\Diff\Browser; | ||
|
|
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| use MakinaCorpus\QueryBuilder\Schema\Diff\Condition\AbstractCondition; | ||
| use MakinaCorpus\QueryBuilder\Schema\Diff\SchemaTransaction; | ||
| use MakinaCorpus\QueryBuilder\Schema\Diff\Transaction\AbstractNestedSchemaTransaction; | ||
|
|
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| class ChangeLogBrowser | ||
| { | ||
| /** @var ChangeLogVisitor[] */ | ||
| private array $visitors = []; | ||
|
|
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| public function addVisitor(ChangeLogVisitor $visitor): void | ||
| { | ||
| $this->visitors[] = $visitor; | ||
| } | ||
|
|
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| public function browse(SchemaTransaction $transaction): void | ||
| { | ||
| try { | ||
| foreach ($this->visitors as $visitor) { | ||
| $visitor->start($transaction); | ||
| } | ||
|
|
||
| foreach ($transaction->getChangeLog()->getAll() as $change) { | ||
| if ($change instanceof AbstractNestedSchemaTransaction) { | ||
| $this->reduceNested($change, 1, $this->visitors); | ||
| } else { | ||
| foreach ($this->visitors as $visitor) { | ||
| $visitor->apply($change); | ||
| } | ||
| } | ||
| } | ||
|
|
||
| foreach ($this->visitors as $visitor) { | ||
| $visitor->stop($transaction); | ||
| } | ||
| } catch (\Throwable $error) { | ||
| foreach ($this->visitors as $visitor) { | ||
| $visitor->error($transaction, $error); | ||
| } | ||
|
|
||
| throw $error; | ||
| } | ||
| } | ||
|
|
||
| /** | ||
| * @param AbstractCondition[] $conditions | ||
| */ | ||
| protected function evaluateConditions(array $conditions, ChangeLogVisitor $visitor): bool | ||
| { | ||
| foreach ($conditions as $condition) { | ||
| if (!$visitor->evaluate($condition)) { | ||
| return false; | ||
| } | ||
| } | ||
| return true; | ||
| } | ||
|
|
||
| /** | ||
| * @param ChangeLogVisitor[] $visitors | ||
| */ | ||
| protected function reduceNested(AbstractNestedSchemaTransaction $new, int $depth, array $visitors) | ||
| { | ||
| if ($conditions = $new->getConditions()) { | ||
| $candidates = []; | ||
|
|
||
| foreach ($visitors as $visitor) { | ||
| \assert($visitor instanceof ChangeLogVisitor); | ||
|
|
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| if ($this->evaluateConditions($conditions, $visitor)) { | ||
| $candidates[] = $visitor; | ||
| } else { | ||
| $visitor->skip($new, $depth); | ||
| } | ||
| } | ||
|
|
||
| if ($candidates) { | ||
| $this->browseNested($new, $depth, $candidates); | ||
| } | ||
| } | ||
| } | ||
|
|
||
| /** | ||
| * @param ChangeLogVisitor[] $visitors | ||
| */ | ||
| protected function browseNested(AbstractNestedSchemaTransaction $new, int $depth, array $visitors): void | ||
| { | ||
| foreach ($visitors as $visitor) { | ||
| $visitor->enter($new, $depth); | ||
| } | ||
|
|
||
| foreach ($new->getChangeLog()->getAll() as $change) { | ||
| if ($change instanceof AbstractNestedSchemaTransaction) { | ||
| $this->reduceNested($change, $depth + 1, $visitors); | ||
| } else { | ||
| foreach ($visitors as $visitor) { | ||
| $visitor->apply($change); | ||
| } | ||
| } | ||
| } | ||
|
|
||
| foreach ($visitors as $visitor) { | ||
| $visitor->leave($new, $depth); | ||
| } | ||
| } | ||
| } |
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