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<?php
namespace Laminas\Db\Sql\Platform\Mysql\Ddl;
use Laminas\Db\Adapter\Platform\PlatformInterface;
use Laminas\Db\Sql\Ddl\AlterTable;
use Laminas\Db\Sql\Platform\PlatformDecoratorInterface;
use function count;
use function range;
use function str_replace;
use function strlen;
use function strpos;
use function strtolower;
use function strtoupper;
use function substr_replace;
use function uksort;
class AlterTableDecorator extends AlterTable implements PlatformDecoratorInterface
{
/** @var AlterTable */
protected $subject;
/** @var int[] */
protected $columnOptionSortOrder = [
'unsigned' => 0,
'zerofill' => 1,
'identity' => 2,
'serial' => 2,
'autoincrement' => 2,
'comment' => 3,
'columnformat' => 4,
'format' => 4,
'storage' => 5,
'after' => 6,
];
/**
* @param AlterTable $subject
* @return $this Provides a fluent interface
*/
public function setSubject($subject)
{
$this->subject = $subject;
return $this;
}
/**
* @param string $sql
* @return array
*/
protected function getSqlInsertOffsets($sql)
{
$sqlLength = strlen($sql);
$insertStart = [];
foreach (['NOT NULL', 'NULL', 'DEFAULT', 'UNIQUE', 'PRIMARY', 'REFERENCES'] as $needle) {
$insertPos = strpos($sql, ' ' . $needle);
if ($insertPos !== false) {
switch ($needle) {
case 'REFERENCES':
$insertStart[2] = ! isset($insertStart[2]) ? $insertPos : $insertStart[2];
// no break
case 'PRIMARY':
case 'UNIQUE':
$insertStart[1] = ! isset($insertStart[1]) ? $insertPos : $insertStart[1];
// no break
default:
$insertStart[0] = ! isset($insertStart[0]) ? $insertPos : $insertStart[0];
}
}
}
foreach (range(0, 3) as $i) {
$insertStart[$i] = $insertStart[$i] ?? $sqlLength;
}
return $insertStart;
}
/**
* @return array
*/
protected function processAddColumns(?PlatformInterface $adapterPlatform = null)
{
$sqls = [];
foreach ($this->addColumns as $i => $column) {
$sql = $this->processExpression($column, $adapterPlatform);
$insertStart = $this->getSqlInsertOffsets($sql);
$columnOptions = $column->getOptions();
uksort($columnOptions, [$this, 'compareColumnOptions']);
foreach ($columnOptions as $coName => $coValue) {
$insert = '';
if (! $coValue) {
continue;
}
switch ($this->normalizeColumnOption($coName)) {
case 'unsigned':
$insert = ' UNSIGNED';
$j = 0;
break;
case 'zerofill':
$insert = ' ZEROFILL';
$j = 0;
break;
case 'identity':
case 'serial':
case 'autoincrement':
$insert = ' AUTO_INCREMENT';
$j = 1;
break;
case 'comment':
$insert = ' COMMENT ' . $adapterPlatform->quoteValue($coValue);
$j = 2;
break;
case 'columnformat':
case 'format':
$insert = ' COLUMN_FORMAT ' . strtoupper($coValue);
$j = 2;
break;
case 'storage':
$insert = ' STORAGE ' . strtoupper($coValue);
$j = 2;
break;
case 'after':
$insert = ' AFTER ' . $adapterPlatform->quoteIdentifier($coValue);
$j = 2;
}
if ($insert) {
$j = $j ?? 0;
$sql = substr_replace($sql, $insert, $insertStart[$j], 0);
$insertStartCount = count($insertStart);
for (; $j < $insertStartCount; ++$j) {
$insertStart[$j] += strlen($insert);
}
}
}
$sqls[$i] = $sql;
}
return [$sqls];
}
/**
* @return array
*/
protected function processChangeColumns(?PlatformInterface $adapterPlatform = null)
{
$sqls = [];
foreach ($this->changeColumns as $name => $column) {
$sql = $this->processExpression($column, $adapterPlatform);
$insertStart = $this->getSqlInsertOffsets($sql);
$columnOptions = $column->getOptions();
uksort($columnOptions, [$this, 'compareColumnOptions']);
foreach ($columnOptions as $coName => $coValue) {
$insert = '';
if (! $coValue) {
continue;
}
switch ($this->normalizeColumnOption($coName)) {
case 'unsigned':
$insert = ' UNSIGNED';
$j = 0;
break;
case 'zerofill':
$insert = ' ZEROFILL';
$j = 0;
break;
case 'identity':
case 'serial':
case 'autoincrement':
$insert = ' AUTO_INCREMENT';
$j = 1;
break;
case 'comment':
$insert = ' COMMENT ' . $adapterPlatform->quoteValue($coValue);
$j = 2;
break;
case 'columnformat':
case 'format':
$insert = ' COLUMN_FORMAT ' . strtoupper($coValue);
$j = 2;
break;
case 'storage':
$insert = ' STORAGE ' . strtoupper($coValue);
$j = 2;
break;
}
if ($insert) {
$j = $j ?? 0;
$sql = substr_replace($sql, $insert, $insertStart[$j], 0);
$insertStartCount = count($insertStart);
for (; $j < $insertStartCount; ++$j) {
$insertStart[$j] += strlen($insert);
}
}
}
$sqls[] = [
$adapterPlatform->quoteIdentifier($name),
$sql,
];
}
return [$sqls];
}
/**
* @param string $name
* @return string
*/
private function normalizeColumnOption($name)
{
return strtolower(str_replace(['-', '_', ' '], '', $name));
}
/**
* @param string $columnA
* @param string $columnB
* @return int
*/
// phpcs:ignore SlevomatCodingStandard.Classes.UnusedPrivateElements.UnusedMethod
private function compareColumnOptions($columnA, $columnB)
{
$columnA = $this->normalizeColumnOption($columnA);
$columnA = $this->columnOptionSortOrder[$columnA] ?? count($this->columnOptionSortOrder);
$columnB = $this->normalizeColumnOption($columnB);
$columnB = $this->columnOptionSortOrder[$columnB] ?? count($this->columnOptionSortOrder);
return $columnA - $columnB;
}
}