Add more parameters to the computeNbUnique event (#15808)

2 files changed, 10 insertions, 2 deletions

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2a34126692..1e0a2a5cc8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,11 @@ This is the Developer Changelog for Matomo platform developers. All changes in o
 
 The Product Changelog at **[matomo.org/changelog](https://matomo.org/changelog)** lets you see more details about any Matomo release, such as the list of new guides and FAQs, security fixes, and links to all closed issues. 
 
+## Matomo 3.13.5
+
+### New API
+* A new event `ArchiveProcessor.ComputeNbUniques.getIdSites` was added so plugins can change which site IDs should be included when processing the number unique visitors and users for a specific site.
+
 ## Matomo 3.13.1
 
 ### Deprecations
diff --git a/core/ArchiveProcessor.php b/core/ArchiveProcessor.php
index d5061d9f07..26e2c65f79 100644
--- a/core/ArchiveProcessor.php
+++ b/core/ArchiveProcessor.php
@@ -480,7 +480,8 @@ class ArchiveProcessor
 
     private function getIdSitesToComputeNbUniques()
     {
-        $sites = array($this->getParams()->getSite()->getId());
+        $params = $this->getParams();
+        $sites = array($params->getSite()->getId());
 
         /**
          * Triggered to change which site ids should be looked at when processing unique visitors and users.
@@ -488,8 +489,10 @@ class ArchiveProcessor
          * @param array &$idSites An array with one idSite. This site is being archived currently. To cancel the query
          *                        you can change this value to an empty array. To include other sites in the query you
          *                        can add more idSites to this list of idSites.
+         * @param Period $period  The period that is being requested to be archived.
+         * @param Segment $segment The segment that is request to be archived.
          */
-        Piwik::postEvent('ArchiveProcessor.ComputeNbUniques.getIdSites', array(&$sites));
+        Piwik::postEvent('ArchiveProcessor.ComputeNbUniques.getIdSites', array(&$sites, $params->getPeriod(), $params->getSegment()));
 
         return $sites;
     }