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<?php
/* Icinga Web 2 | (c) 2014 Icinga Development Team | GPLv2+ */
namespace Icinga\Data\Filter;
use Exception;
class FilterExpression extends Filter
{
protected $column;
protected $sign;
protected $expression;
/**
* Does this filter compare case sensitive?
*
* @var bool
*/
protected $caseSensitive;
public function __construct($column, $sign, $expression)
{
$column = trim($column);
$this->column = $column;
$this->sign = $sign;
$this->expression = $expression;
$this->caseSensitive = true;
}
public function isExpression()
{
return true;
}
public function isChain()
{
return false;
}
public function isEmpty()
{
return false;
}
public function getColumn()
{
return $this->column;
}
public function getSign()
{
return $this->sign;
}
public function setColumn($column)
{
$this->column = $column;
return $this;
}
public function getExpression()
{
return $this->expression;
}
/**
* Return whether this filter compares case sensitive
*
* @return bool
*/
public function getCaseSensitive()
{
return $this->caseSensitive;
}
public function setExpression($expression)
{
$this->expression = $expression;
return $this;
}
public function setSign($sign)
{
if ($sign !== $this->sign) {
return Filter::expression($this->column, $sign, $this->expression);
}
return $this;
}
/**
* Set this filter's case sensitivity
*
* @param bool $caseSensitive
*
* @return $this
*/
public function setCaseSensitive($caseSensitive = true)
{
$this->caseSensitive = $caseSensitive;
return $this;
}
public function listFilteredColumns()
{
return array($this->getColumn());
}
public function __toString()
{
if ($this->isBooleanTrue()) {
return $this->column;
}
$expression = is_array($this->expression) ?
'( ' . implode(' | ', $this->expression) . ' )' :
$this->expression;
return sprintf(
'%s %s %s',
$this->column,
$this->sign,
$expression
);
}
public function toQueryString()
{
if ($this->isBooleanTrue()) {
return $this->column;
}
$expression = is_array($this->expression) ?
'(' . implode('|', array_map('rawurlencode', $this->expression)) . ')' :
rawurlencode($this->expression);
return $this->column . $this->sign . $expression;
}
protected function isBooleanTrue()
{
return $this->sign === '=' && $this->expression === true;
}
/**
* If $var is a scalar, do the same as strtolower() would do.
* If $var is an array, map $this->strtolowerRecursive() to its elements.
* Otherwise, return $var unchanged.
*
* @param mixed $var
*
* @return mixed
*/
protected function strtolowerRecursive($var)
{
if ($var === null) {
return '';
}
if (is_scalar($var)) {
return strtolower($var);
}
if (is_array($var)) {
return array_map(array($this, 'strtolowerRecursive'), $var);
}
return $var;
}
public function matches($row)
{
try {
$rowValue = $row->{$this->column};
} catch (Exception $e) {
// TODO: REALLY? Exception?
return false;
}
if ($this->caseSensitive) {
$expression = $this->expression;
} else {
$rowValue = $this->strtolowerRecursive($rowValue);
$expression = $this->strtolowerRecursive($this->expression);
}
if (is_array($expression)) {
return in_array($rowValue, $expression);
}
$expression = (string) $expression;
if (strpos($expression, '*') === false) {
if (is_array($rowValue)) {
return in_array($expression, $rowValue);
}
return (string) $rowValue === $expression;
}
$parts = array();
foreach (preg_split('~\*~', $expression) as $part) {
$parts[] = preg_quote($part, '/');
}
$pattern = '/^' . implode('.*', $parts) . '$/';
if (is_array($rowValue)) {
foreach ($rowValue as $candidate) {
if (preg_match($pattern, $candidate)) {
return true;
}
}
return false;
}
return $rowValue !== null && preg_match($pattern, $rowValue);
}
public function andFilter(Filter $filter)
{
return Filter::matchAll($this, $filter);
}
public function orFilter(Filter $filter)
{
return Filter::matchAny($this, $filter);
}
}
|
