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Mini Shell
<?php
declare(strict_types=1);
namespace PhpMyAdmin\SqlParser\Components;
use PhpMyAdmin\SqlParser\Component;
use PhpMyAdmin\SqlParser\Parser;
use PhpMyAdmin\SqlParser\Token;
use PhpMyAdmin\SqlParser\TokensList;
use function implode;
use function trim;
/**
* `INTO` keyword parser.
*
* @final
*/
class IntoKeyword extends Component
{
/**
* FIELDS/COLUMNS Options for `SELECT...INTO` statements.
*
* @var array<string, int|array<int, int|string>>
* @psalm-var array<string, (positive-int|array{positive-int, ('var'|'var='|'expr'|'expr=')})>
*/
public static $FIELDS_OPTIONS = [
'TERMINATED BY' => [
1,
'expr',
],
'OPTIONALLY' => 2,
'ENCLOSED BY' => [
3,
'expr',
],
'ESCAPED BY' => [
4,
'expr',
],
];
/**
* LINES Options for `SELECT...INTO` statements.
*
* @var array<string, int|array<int, int|string>>
* @psalm-var array<string, (positive-int|array{positive-int, ('var'|'var='|'expr'|'expr=')})>
*/
public static $LINES_OPTIONS = [
'STARTING BY' => [
1,
'expr',
],
'TERMINATED BY' => [
2,
'expr',
],
];
/**
* Type of target (OUTFILE or SYMBOL).
*
* @var string|null
*/
public $type;
/**
* The destination, which can be a table or a file.
*
* @var string|Expression|null
*/
public $dest;
/**
* The name of the columns.
*
* @var string[]|null
*/
public $columns;
/**
* The values to be selected into (SELECT .. INTO @var1).
*
* @var Expression[]|null
*/
public $values;
/**
* Options for FIELDS/COLUMNS keyword.
*
* @see static::$FIELDS_OPTIONS
*
* @var OptionsArray|null
*/
public $fields_options;
/**
* Whether to use `FIELDS` or `COLUMNS` while building.
*
* @var bool|null
*/
public $fields_keyword;
/**
* Options for OPTIONS keyword.
*
* @see static::$LINES_OPTIONS
*
* @var OptionsArray|null
*/
public $lines_options;
/**
* @param string|null $type type of destination (may be OUTFILE)
* @param string|Expression|null $dest actual destination
* @param string[]|null $columns column list of destination
* @param Expression[]|null $values selected fields
* @param OptionsArray|null $fieldsOptions options for FIELDS/COLUMNS keyword
* @param bool|null $fieldsKeyword options for OPTIONS keyword
*/
public function __construct(
$type = null,
$dest = null,
$columns = null,
$values = null,
$fieldsOptions = null,
$fieldsKeyword = null
) {
$this->type = $type;
$this->dest = $dest;
$this->columns = $columns;
$this->values = $values;
$this->fields_options = $fieldsOptions;
$this->fields_keyword = $fieldsKeyword;
}
/**
* @param Parser $parser the parser that serves as context
* @param TokensList $list the list of tokens that are being parsed
* @param array<string, mixed> $options parameters for parsing
*
* @return IntoKeyword
*/
public static function parse(Parser $parser, TokensList $list, array $options = [])
{
$ret = new static();
/**
* The state of the parser.
*
* Below are the states of the parser.
*
* 0 -----------------------[ name ]----------------------> 1
* 0 ---------------------[ OUTFILE ]---------------------> 2
*
* 1 ------------------------[ ( ]------------------------> (END)
*
* 2 ---------------------[ filename ]--------------------> 1
*
* @var int
*/
$state = 0;
for (; $list->idx < $list->count; ++$list->idx) {
/**
* Token parsed at this moment.
*/
$token = $list->tokens[$list->idx];
// End of statement.
if ($token->type === Token::TYPE_DELIMITER) {
break;
}
// Skipping whitespaces and comments.
if (($token->type === Token::TYPE_WHITESPACE) || ($token->type === Token::TYPE_COMMENT)) {
continue;
}
if (($token->type === Token::TYPE_KEYWORD) && ($token->flags & Token::FLAG_KEYWORD_RESERVED)) {
if (($state === 0) && ($token->keyword === 'OUTFILE')) {
$ret->type = 'OUTFILE';
$state = 2;
continue;
}
// No other keyword is expected except for $state = 4, which expects `LINES`
if ($state !== 4) {
break;
}
}
if ($state === 0) {
if (
(isset($options['fromInsert'])
&& $options['fromInsert'])
|| (isset($options['fromReplace'])
&& $options['fromReplace'])
) {
$ret->dest = Expression::parse(
$parser,
$list,
[
'parseField' => 'table',
'breakOnAlias' => true,
]
);
} else {
$ret->values = ExpressionArray::parse($parser, $list);
}
$state = 1;
} elseif ($state === 1) {
if (($token->type === Token::TYPE_OPERATOR) && ($token->value === '(')) {
$ret->columns = ArrayObj::parse($parser, $list)->values;
++$list->idx;
}
break;
} elseif ($state === 2) {
$ret->dest = $token->value;
$state = 3;
} elseif ($state === 3) {
$ret->parseFileOptions($parser, $list, $token->keyword);
$state = 4;
} elseif ($state === 4) {
if ($token->type === Token::TYPE_KEYWORD && $token->keyword !== 'LINES') {
break;
}
$ret->parseFileOptions($parser, $list, $token->keyword);
$state = 5;
}
}
--$list->idx;
return $ret;
}
/**
* @param Parser $parser The parser
* @param TokensList $list A token list
* @param string $keyword The keyword
*
* @return void
*/
public function parseFileOptions(Parser $parser, TokensList $list, $keyword = 'FIELDS')
{
++$list->idx;
if ($keyword === 'FIELDS' || $keyword === 'COLUMNS') {
// parse field options
$this->fields_options = OptionsArray::parse($parser, $list, static::$FIELDS_OPTIONS);
$this->fields_keyword = ($keyword === 'FIELDS');
} else {
// parse line options
$this->lines_options = OptionsArray::parse($parser, $list, static::$LINES_OPTIONS);
}
}
/**
* @param IntoKeyword $component the component to be built
* @param array<string, mixed> $options parameters for building
*
* @return string
*/
public static function build($component, array $options = [])
{
if ($component->dest instanceof Expression) {
$columns = ! empty($component->columns) ? '(`' . implode('`, `', $component->columns) . '`)' : '';
return $component->dest . $columns;
}
if (isset($component->values)) {
return ExpressionArray::build($component->values);
}
$ret = 'OUTFILE "' . $component->dest . '"';
$fieldsOptionsString = OptionsArray::build($component->fields_options);
if (trim($fieldsOptionsString) !== '') {
$ret .= $component->fields_keyword ? ' FIELDS' : ' COLUMNS';
$ret .= ' ' . $fieldsOptionsString;
}
$linesOptionsString = OptionsArray::build($component->lines_options, ['expr' => true]);
if (trim($linesOptionsString) !== '') {
$ret .= ' LINES ' . $linesOptionsString;
}
return $ret;
}
}
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