Final Class Yiisoft\Db\Migration\Service\Generate\FieldsParser

                public function __construct(
    private readonly ForeignKeyFactory $foreignKeyFactory,
) {}

            

                public function parse(
    string $table,
    ?string $value,
    bool $addDefaultPrimaryKey,
): array {
    $columns = [];
    $foreignKeys = [];
    if (!empty($value)) {
        $fields = explode(',', $value);
        /** @psalm-var string[] $fields */
        foreach ($fields as $field) {
            $chunks = $this->splitFieldIntoChunks($field);
            $columnName = (string) array_shift($chunks);
            /** @psalm-var string[] $chunks */
            foreach ($chunks as $i => $chunk) {
                if (str_starts_with($chunk, 'foreignKey')) {
                    preg_match('/foreignKey\((\w*)\s?(\w*)\)/', $chunk, $matches);
                    /** @psalm-suppress PossiblyNullArgument */
                    $foreignKeys[] = $this->foreignKeyFactory->create(
                        $table,
                        $columnName,
                        $matches[1] ?? preg_replace('/_id$/', '', $columnName),
                        empty($matches[2]) ? null : $matches[2],
                    );
                    unset($chunks[$i]);
                    continue;
                }
                if (!preg_match('/\(([^(]+)\)$/', $chunk)) {
                    $chunks[$i] .= '()';
                }
            }
            /** @psalm-var string[] $chunks */
            $columns[] = new Column($columnName, $chunks);
        }
    }
    if ($addDefaultPrimaryKey) {
        $this->addDefaultPrimaryKey($columns);
    }
    return [$columns, $foreignKeys];
}