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<?php
/**
* Matomo - free/libre analytics platform
*
* @link https://matomo.org
* @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
*
*/
namespace Piwik\Segment;
use Piwik\Cache;
use Piwik\CacheId;
use Piwik\Columns\Dimension;
use Piwik\Columns\DimensionSegmentFactory;
use Piwik\Piwik;
use Piwik\Plugin\Segment;
/**
* Manages the global list of segments that can be used.
*
* Segments are added automatically by dimensions as well as through the {@hook Segment.addSegments} event.
* Observers for this event should call the {@link addSegment()} method to add segments or use any of the other
* methods to remove segments.
*
* @api since Piwik 4.0.0
*/
class SegmentsList
{
/**
* List of segments
*
* @var Segment[]
*/
private $segments = array();
private $segmentsByNameCache = array();
/**
* @param Segment $segment
*/
public function addSegment(Segment $segment)
{
$this->segments[] = $segment;
$this->segmentsByNameCache = array();
}
/**
* Get all available segments.
*
* @return Segment[]
*/
public function getSegments()
{
return $this->segments;
}
/**
* Removes one or more segments from the segments list.
*
* @param string $segmentCategory The segment category id. Can be a translation token eg 'General_Visits'
* see {@link Segment::getCategoryId()}.
* @param string|false $segmentExpression The segment expression name to remove eg 'pageUrl'.
* If not supplied, all segments within that category will be removed.
*/
public function remove($segmentCategory, $segmentExpression = false)
{
foreach ($this->segments as $index => $segment) {
if ($segment->getCategoryId() === $segmentCategory) {
if (!$segmentExpression || $segment->getSegment() === $segmentExpression) {
unset($this->segments[$index]);
$this->segmentsByNameCache = array();
}
}
}
}
/**
* @param string $segmentExpression Name of the segment expression. eg `pageUrl`
* @return Segment|null
*/
public function getSegment($segmentExpression)
{
if (empty($this->segmentsByNameCache)) {
foreach ($this->segments as $index => $segment) {
$this->segmentsByNameCache[$segment->getSegment()] = $segment;
}
}
if (!empty($this->segmentsByNameCache[$segmentExpression])) {
return $this->segmentsByNameCache[$segmentExpression];
}
return null;
}
/**
* Get all metrics defined in the Piwik platform.
* @ignore
* @return static
*/
public static function get()
{
$cache = Cache::getTransientCache();
$cacheKey = CacheId::siteAware('SegmentsList');
if ($cache->contains($cacheKey)) {
return $cache->fetch($cacheKey);
}
$list = new static;
/**
* Triggered to add custom segment definitions.
*
* **Example**
*
* public function addSegments(&$segments)
* {
* $segment = new Segment();
* $segment->setSegment('my_segment_name');
* $segment->setType(Segment::TYPE_DIMENSION);
* $segment->setName('My Segment Name');
* $segment->setSqlSegment('log_table.my_segment_name');
* $segments[] = $segment;
* }
*
* @param SegmentsList $list An instance of the SegmentsList. You can add segments to the list this way.
*/
Piwik::postEvent('Segment.addSegments', array($list));
foreach (Dimension::getAllDimensions() as $dimension) {
$dimension->configureSegments($list, new DimensionSegmentFactory($dimension));
}
$cache->save($cacheKey, $list);
return $list;
}
}
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