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<?php |
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declare(strict_types=1); |
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/** |
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* Spiral Framework. |
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* |
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* @license MIT |
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* @author Anton Titov (Wolfy-J) |
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*/ |
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namespace Cycle\Schema\Visitor; |
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use Cycle\Schema\Builder; |
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use Cycle\Schema\Definition\Entity; |
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use Cycle\Schema\Exception\BuilderException; |
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use Cycle\Schema\VisitorInterface; |
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use Spiral\Database\Schema\AbstractColumn; |
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/** |
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* Generate table columns based on entity definition. |
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*/ |
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class RenderTable implements VisitorInterface |
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{ |
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/** |
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* Generate table schema based on given entity definition. |
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* |
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* @param Builder $builder |
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* @param Entity $entity |
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*/ |
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public function compute(Builder $builder, Entity $entity) |
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{ |
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// todo: readonly |
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$table = $builder->getTable($entity); |
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$primaryKeys = []; |
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foreach ($entity->getFields() as $field) { |
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$type = $this->parse($table->getName(), $field->getColumn(), $field->getType()); |
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if ($this->hasFlag($type, 'primary')) { |
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$primaryKeys[] = $field->getColumn(); |
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} |
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$this->renderColumn( |
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$table->column($field->getColumn()), |
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$type, |
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!is_null($field->getDefault()), |
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$field->getDefault() |
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); |
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} |
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if (count($primaryKeys)) { |
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$table->setPrimaryKeys($primaryKeys); |
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} |
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} |
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/** |
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* Cast (specify) column schema based on provided column definition and default value. |
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* Spiral will force default values (internally) for every NOT NULL column except primary keys! |
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* |
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* Column definition are compatible with database Migrations and AbstractColumn types. |
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* |
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* Column definition examples (by default all columns has flag NOT NULL): |
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* const SCHEMA = [ |
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* 'id' => 'primary', |
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* 'name' => 'string', //Default length is 255 characters. |
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* 'email' => 'string(255), nullable', //Can be NULL |
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* 'status' => 'enum(active, pending, disabled)', //Enum values, trimmed |
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* 'balance' => 'decimal(10, 2)', |
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* 'message' => 'text, null', //Alias for nullable |
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* 'time_expired' => 'timestamp' |
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* ]; |
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* |
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* Attention, column state will be affected! |
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* |
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* @see AbstractColumn |
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* @param AbstractColumn $column |
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* @param array $type |
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* @param bool $hasDefault Must be set to true if default value was set by user. |
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* @param mixed $default Default value declared by record schema. |
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* |
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* @throws BuilderException |
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*/ |
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protected function renderColumn(AbstractColumn $column, array $type, bool $hasDefault, $default = null) |
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{ |
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// ORM force EVERY column to NOT NULL state unless different is said |
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$column->nullable(false); |
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if ($this->hasFlag($type, 'null') || $this->hasFlag($type, 'nullable')) { |
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// indication that column is nullable |
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$column->nullable(true); |
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} |
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try { |
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// bypassing call to AbstractColumn->__call method (or specialized column method) |
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call_user_func_array([$column, $type['type']], $type['options']); |
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} catch (\Throwable $e) { |
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throw new BuilderException( |
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"Invalid column type definition in '{$column->getTable()}'.'{$column->getName()}'", |
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$e->getCode(), |
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$e |
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); |
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} |
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if (in_array($column->getAbstractType(), ['primary', 'bigPrimary'])) { |
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// no default value can be set of primary keys |
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return; |
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} |
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if (!$hasDefault && !$column->isNullable()) { |
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if (!$this->hasFlag($type, 'required') && !$this->hasFlag($type, 'primary')) { |
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// we have to come up with some default value |
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$column->defaultValue($this->castDefault($column)); |
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} |
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return; |
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} |
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if (is_null($default)) { |
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// default value is stated and NULL, clear what to do |
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$column->nullable(true); |
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} |
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$column->defaultValue($default); |
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} |
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/** |
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* @param string $table |
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* @param string $column |
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* @param string $definition |
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* @return array |
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*/ |
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protected function parse(string $table, string $column, string $definition): array |
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{ |
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if (!preg_match( |
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'/(?P<type>[a-z]+)(?: *\((?P<options>[^\)]+)\))?(?: *, *(?P<flags>.+))?/i', |
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$definition, |
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$type |
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)) { |
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throw new BuilderException("Invalid column type definition in '{$table}'.'{$column}'"); |
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} |
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if (empty($type['options'])) { |
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$type['options'] = []; |
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} else { |
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$type['options'] = array_map('trim', explode(',', $type['options'] ?? '')); |
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} |
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if (empty($type['flags'])) { |
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$type['flags'] = []; |
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} else { |
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$type['flags'] = array_map('trim', explode(',', $type['flags'] ?? '')); |
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} |
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unset($type[0], $type[1], $type[2], $type[3]); |
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return $type; |
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} |
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/** |
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* @param array $type |
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* @param string $flag |
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* @return bool |
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*/ |
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protected function hasFlag(array $type, string $flag): bool |
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{ |
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return in_array($flag, $type['flags'], true); |
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} |
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/** |
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* Cast default value based on column type. Required to prevent conflicts when not nullable |
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* column added to existed table with data in. |
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* |
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* @param AbstractColumn $column |
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* @return mixed |
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*/ |
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protected function castDefault(AbstractColumn $column) |
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{ |
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if (in_array($column->getAbstractType(), ['timestamp', 'datetime', 'time', 'date'])) { |
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return 0; |
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} |
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if ($column->getAbstractType() == 'enum') { |
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// we can use first enum value as default |
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return $column->getEnumValues()[0]; |
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} |
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switch ($column->getType()) { |
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case AbstractColumn::INT: |
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return 0; |
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case AbstractColumn::FLOAT: |
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return 0.0; |
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case AbstractColumn::BOOL: |
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return false; |
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} |
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return ''; |
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} |
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} |
cycle /
schema-builder
