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<?php
/**
* Piwik - Open source web analytics
*
* @link http://piwik.org
* @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
*
* @category Piwik
* @package Piwik
*/
/**
* Delete all rows for which the given $columnToFilter do not contain the $patternToSearch
* This filter is to be used on columns containing strings.
* Example: from the keyword report, keep only the rows for which the label contains "piwik"
*
* @package Piwik
* @subpackage Piwik_DataTable
*/
class Piwik_DataTable_Filter_Pattern extends Piwik_DataTable_Filter
{
private $columnToFilter;
private $patternToSearch;
private $patternToSearchQuoted;
private $invertedMatch;
/**
* @param Piwik_DataTable $table
* @param string $columnToFilter
* @param string $patternToSearch
* @param bool $invertedMatch
*/
public function __construct($table, $columnToFilter, $patternToSearch, $invertedMatch = false)
{
parent::__construct($table);
$this->patternToSearch = $patternToSearch;
$this->patternToSearchQuoted = self::getPatternQuoted($patternToSearch);
$this->columnToFilter = $columnToFilter;
$this->invertedMatch = $invertedMatch;
}
/**
* Helper method to return the given pattern quoted
*
* @param string $pattern
* @return string
*/
static public function getPatternQuoted($pattern)
{
return '/' . str_replace('/', '\/', $pattern) . '/';
}
/**
* Performs case insensitive match
*
* @param string $pattern
* @param string $patternQuoted
* @param string $string
* @param bool $invertedMatch
* @return int
*/
static public function match($pattern, $patternQuoted, $string, $invertedMatch)
{
return @preg_match($patternQuoted . "i", $string) == 1 ^ $invertedMatch;
}
/**
* @param Piwik_DataTable $table
*/
public function filter($table)
{
foreach ($table->getRows() as $key => $row) {
//instead search must handle
// - negative search with -piwik
// - exact match with ""
// see (?!pattern) A subexpression that performs a negative lookahead search, which matches the search string at any point where a string not matching pattern begins.
$value = $row->getColumn($this->columnToFilter);
if ($value === false) {
$value = $row->getMetadata($this->columnToFilter);
}
if (!self::match($this->patternToSearch, $this->patternToSearchQuoted, $value, $this->invertedMatch)) {
$table->deleteRow($key);
}
}
}
}
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