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<?php
/**
* This file is part of the Nette Framework (https://nette.org)
* Copyright (c) 2004 David Grudl (https://davidgrudl.com)
*/
namespace Nette\Database;
use Nette;
/**
* SQL preprocessor.
*/
class SqlPreprocessor
{
use Nette\SmartObject;
/** @var Connection */
private $connection;
/** @var ISupplementalDriver */
private $driver;
/** @var array of input parameters */
private $params;
/** @var array of parameters to be processed by PDO */
private $remaining;
/** @var int */
private $counter;
/** @var string values|set|and|order */
private $arrayMode;
public function __construct(Connection $connection)
{
$this->connection = $connection;
$this->driver = $connection->getSupplementalDriver();
}
/**
* @param array
* @return array of [sql, params]
*/
public function process($params)
{
$this->params = $params;
$this->counter = 0;
$prev = -1;
$this->remaining = [];
$this->arrayMode = NULL;
$res = [];
while ($this->counter < count($params)) {
$param = $params[$this->counter++];
if (($this->counter === 2 && count($params) === 2) || !is_scalar($param)) {
$res[] = $this->formatValue($param, 'auto');
$this->arrayMode = NULL;
} elseif (is_string($param) && $this->counter > $prev + 1) {
$prev = $this->counter;
$this->arrayMode = NULL;
$res[] = Nette\Utils\Strings::replace(
$param,
'~\'[^\']*+\'|"[^"]*+"|\?[a-z]*|^\s*+(?:INSERT|REPLACE)\b|\b(?:SET|WHERE|HAVING|ORDER BY|GROUP BY|KEY UPDATE)(?=\s*\z|\s*\?)|/\*.*?\*/|--[^\n]*~si',
[$this, 'callback']
);
} else {
throw new Nette\InvalidArgumentException('There are more parameters than placeholders.');
}
}
return [implode(' ', $res), $this->remaining];
}
/** @internal */
public function callback($m)
{
$m = $m[0];
if ($m[0] === '?') { // placeholder
if ($this->counter >= count($this->params)) {
throw new Nette\InvalidArgumentException('There are more placeholders than passed parameters.');
}
return $this->formatValue($this->params[$this->counter++], substr($m, 1) ?: 'auto');
} elseif ($m[0] === "'" || $m[0] === '"' || $m[0] === '/' || $m[0] === '-') { // string or comment
return $m;
} else { // command
static $modes = [
'INSERT' => 'values',
'REPLACE' => 'values',
'KEY UPDATE' => 'set',
'SET' => 'set',
'WHERE' => 'and',
'HAVING' => 'and',
'ORDER BY' => 'order',
'GROUP BY' => 'order',
];
$this->arrayMode = $modes[ltrim(strtoupper($m))];
return $m;
}
}
private function formatValue($value, $mode = NULL)
{
if (!$mode || $mode === 'auto') {
if (is_string($value)) {
if (strlen($value) > 20) {
$this->remaining[] = $value;
return '?';
} else {
return $this->connection->quote($value);
}
} elseif (is_int($value)) {
return (string) $value;
} elseif (is_float($value)) {
return rtrim(rtrim(number_format($value, 10, '.', ''), '0'), '.');
} elseif (is_bool($value)) {
return $this->driver->formatBool($value);
} elseif ($value === NULL) {
return 'NULL';
} elseif ($value instanceof Table\IRow) {
return $value->getPrimary();
} elseif ($value instanceof SqlLiteral) {
$prep = clone $this;
list($res, $params) = $prep->process(array_merge([$value->__toString()], $value->getParameters()));
$this->remaining = array_merge($this->remaining, $params);
return $res;
} elseif ($value instanceof \DateTimeInterface) {
return $this->driver->formatDateTime($value);
} elseif ($value instanceof \DateInterval) {
return $this->driver->formatDateInterval($value);
} elseif (is_object($value) && method_exists($value, '__toString')) {
return $this->formatValue((string) $value);
} elseif (is_resource($value)) {
$this->remaining[] = $value;
return '?';
}
} elseif ($mode === 'name') {
if (!is_string($value)) {
$type = gettype($value);
throw new Nette\InvalidArgumentException("Placeholder ?$mode expects string, $type given.");
}
return $this->delimite($value);
}
if ($value instanceof \Traversable && !$value instanceof Table\IRow) {
$value = iterator_to_array($value);
}
if (is_array($value)) {
$vx = $kx = [];
if ($mode === 'auto') {
$mode = $this->arrayMode;
}
if ($mode === 'values') { // (key, key, ...) VALUES (value, value, ...)
if (array_key_exists(0, $value)) { // multi-insert
foreach ($value[0] as $k => $v) {
$kx[] = $this->delimite($k);
}
foreach ($value as $val) {
$vx2 = [];
foreach ($val as $v) {
$vx2[] = $this->formatValue($v);
}
$vx[] = implode(', ', $vx2);
}
$select = $this->driver->isSupported(ISupplementalDriver::SUPPORT_MULTI_INSERT_AS_SELECT);
return '(' . implode(', ', $kx) . ($select ? ') SELECT ' : ') VALUES (')
. implode($select ? ' UNION ALL SELECT ' : '), (', $vx) . ($select ? '' : ')');
}
foreach ($value as $k => $v) {
$kx[] = $this->delimite($k);
$vx[] = $this->formatValue($v);
}
return '(' . implode(', ', $kx) . ') VALUES (' . implode(', ', $vx) . ')';
} elseif (!$mode || $mode === 'set') {
foreach ($value as $k => $v) {
if (is_int($k)) { // value, value, ... OR (1, 2), (3, 4)
$vx[] = is_array($v) ? '(' . $this->formatValue($v) . ')' : $this->formatValue($v);
} elseif (substr($k, -1) === '=') { // key+=value, key-=value, ...
$k2 = $this->delimite(substr($k, 0, -2));
$vx[] = $k2 . '=' . $k2 . ' ' . substr($k, -2, 1) . ' ' . $this->formatValue($v);
} else { // key=value, key=value, ...
$vx[] = $this->delimite($k) . '=' . $this->formatValue($v);
}
}
return implode(', ', $vx);
} elseif ($mode === 'and' || $mode === 'or') { // (key [operator] value) AND ...
foreach ($value as $k => $v) {
if (is_int($k)) {
$vx[] = $this->formatValue($v);
continue;
}
list($k, $operator) = explode(' ', $k . ' ');
$k = $this->delimite($k);
if (is_array($v)) {
if ($v) {
$vx[] = $k . ' ' . ($operator ? $operator . ' ' : '') . 'IN (' . $this->formatValue(array_values($v)) . ')';
} elseif ($operator === 'NOT') {
} else {
$vx[] = '1=0';
}
} else {
$v = $this->formatValue($v);
$vx[] = $k . ' ' . ($operator ?: ($v === 'NULL' ? 'IS' : '=')) . ' ' . $v;
}
}
return $value ? '(' . implode(') ' . strtoupper($mode) . ' (', $vx) . ')' : '1=1';
} elseif ($mode === 'order') { // key, key DESC, ...
foreach ($value as $k => $v) {
$vx[] = $this->delimite($k) . ($v > 0 ? '' : ' DESC');
}
return implode(', ', $vx);
} else {
throw new Nette\InvalidArgumentException("Unknown placeholder ?$mode.");
}
} elseif (in_array($mode, ['and', 'or', 'set', 'values', 'order'], TRUE)) {
$type = gettype($value);
throw new Nette\InvalidArgumentException("Placeholder ?$mode expects array or Traversable object, $type given.");
} elseif ($mode && $mode !== 'auto') {
throw new Nette\InvalidArgumentException("Unknown placeholder ?$mode.");
} else {
throw new Nette\InvalidArgumentException('Unexpected type of parameter: ' . (is_object($value) ? get_class($value) : gettype($value)));
}
}
private function delimite($name)
{
return implode('.', array_map([$this->driver, 'delimite'], explode('.', $name)));
}
}
|
