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<?php
/**
* Parses an array.
*
* @package SqlParser
* @subpackage Components
*/
namespace SqlParser\Components;
use SqlParser\Component;
use SqlParser\Parser;
use SqlParser\Token;
use SqlParser\TokensList;
/**
* Parses an array.
*
* @category Components
* @package SqlParser
* @subpackage Components
* @author Dan Ungureanu <udan1107@gmail.com>
* @license http://opensource.org/licenses/GPL-2.0 GNU Public License
*/
class ArrayObj extends Component
{
/**
* The array that contains the unprocessed value of each token.
*
* @var array
*/
public $raw = array();
/**
* The array that contains the processed value of each token.
*
* @var array
*/
public $values = array();
/**
* Constructor.
*
* @param array $raw The unprocessed values.
* @param array $values The processed values.
*/
public function __construct(array $raw = array(), array $values = array())
{
$this->raw = $raw;
$this->values = $values;
}
/**
* @param Parser $parser The parser that serves as context.
* @param TokensList $list The list of tokens that are being parsed.
* @param array $options Parameters for parsing.
*
* @return ArrayObj|Component[]
*/
public static function parse(Parser $parser, TokensList $list, array $options = array())
{
$ret = empty($options['type']) ? new ArrayObj() : array();
/**
* The last raw expression.
*
* @var string $lastRaw
*/
$lastRaw = '';
/**
* The last value.
*
* @var string $lastValue
*/
$lastValue = '';
/**
* Counts brackets.
*
* @var int $brackets
*/
$brackets = 0;
/**
* Last separator (bracket or comma).
*
* @var boolean $isCommaLast
*/
$isCommaLast = false;
for (; $list->idx < $list->count; ++$list->idx) {
/**
* Token parsed at this moment.
*
* @var Token $token
*/
$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)
) {
$lastRaw .= $token->token;
$lastValue = trim($lastValue) . ' ';
continue;
}
if (($brackets === 0)
&& (($token->type !== Token::TYPE_OPERATOR)
|| ($token->value !== '('))
) {
$parser->error(__('An opening bracket was expected.'), $token);
break;
}
if ($token->type === Token::TYPE_OPERATOR) {
if ($token->value === '(') {
if (++$brackets === 1) { // 1 is the base level.
continue;
}
} elseif ($token->value === ')') {
if (--$brackets === 0) { // Array ended.
break;
}
} elseif ($token->value === ',') {
if ($brackets === 1) {
$isCommaLast = true;
if (empty($options['type'])) {
$ret->raw[] = trim($lastRaw);
$ret->values[] = trim($lastValue);
$lastRaw = $lastValue = '';
}
}
continue;
}
}
if (empty($options['type'])) {
$lastRaw .= $token->token;
$lastValue .= $token->value;
} else {
$ret[] = $options['type']::parse(
$parser,
$list,
empty($options['typeOptions']) ? array() : $options['typeOptions']
);
}
}
// Handling last element.
//
// This is treated differently to treat the following cases:
//
// => array()
// (,) => array('', '')
// () => array()
// (a,) => array('a', '')
// (a) => array('a')
//
$lastRaw = trim($lastRaw);
if ((empty($options['type']))
&& ((strlen($lastRaw) > 0) || ($isCommaLast))
) {
$ret->raw[] = $lastRaw;
$ret->values[] = trim($lastValue);
}
return $ret;
}
/**
* @param ArrayObj|ArrayObj[] $component The component to be built.
* @param array $options Parameters for building.
*
* @return string
*/
public static function build($component, array $options = array())
{
if (is_array($component)) {
return implode(', ', $component);
} elseif (!empty($component->raw)) {
return '(' . implode(', ', $component->raw) . ')';
} else {
return '(' . implode(', ', $component->values) . ')';
}
}
}