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msd2/tracking/piwik/core/LogDeleter.php

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+<?php
+/**
+ * Piwik - free/libre analytics platform
+ *
+ * @link http://piwik.org
+ * @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
+ */
+
+namespace Piwik;
+
+use Piwik\DataAccess\RawLogDao;
+use Piwik\Plugin\LogTablesProvider;
+
+/**
+ * Service that deletes log entries. Methods in this class cascade, so deleting visits will delete visit actions,
+ * conversions and conversion items.
+ */
+class LogDeleter
+{
+    /**
+     * @var RawLogDao
+     */
+    private $rawLogDao;
+
+    /**
+     * @var LogTablesProvider
+     */
+    private $logTablesProvider;
+
+    public function __construct(RawLogDao $rawLogDao, LogTablesProvider $logTablesProvider)
+    {
+        $this->rawLogDao = $rawLogDao;
+        $this->logTablesProvider = $logTablesProvider;
+    }
+
+    /**
+     * Deletes visits by ID. This method cascades, so conversions, conversion items and visit actions for
+     * the visits are also deleted.
+     *
+     * @param int[] $visitIds
+     * @return int The number of deleted visits.
+     */
+    public function deleteVisits($visitIds)
+    {
+        $numDeletedVisits = 0;
+
+        foreach ($this->logTablesProvider->getAllLogTables() as $logTable) {
+            if ($logTable->getColumnToJoinOnIdVisit()) {
+                $numVisits = $this->rawLogDao->deleteFromLogTable($logTable->getName(), $visitIds);
+                if ($logTable->getName() === 'log_visit') {
+                    $numDeletedVisits = $numVisits;
+                }
+            }
+        }
+
+        return $numDeletedVisits;
+    }
+
+    /**
+     * Deletes visits within the specified date range and belonging to the specified site (if any). Visits are
+     * deleted in chunks, so only `$iterationStep` visits are deleted at a time.
+     *
+     * @param string|null $startDatetime A datetime string. Visits that occur at this time or after are deleted. If not supplied,
+     *                                   visits from the beginning of time are deleted.
+     * @param string|null $endDatetime A datetime string. Visits that occur before this time are deleted. If not supplied,
+     *                                 visits from the end of time are deleted.
+     * @param int|null $idSite The site to delete visits from.
+     * @param int $iterationStep The number of visits to delete at a single time.
+     * @param callable $afterChunkDeleted Callback executed after every chunk of visits are deleted.
+     * @return int The number of visits deleted.
+     */
+    public function deleteVisitsFor($startDatetime, $endDatetime, $idSite = null, $iterationStep = 1000, $afterChunkDeleted = null)
+    {
+        $fields = array('idvisit');
+        $conditions = array();
+
+        if (!empty($startDatetime)) {
+            $conditions[] = array('visit_last_action_time', '>=', $startDatetime);
+        }
+
+        if (!empty($endDatetime)) {
+            $conditions[] = array('visit_last_action_time', '<', $endDatetime);
+        }
+
+        if (!empty($idSite)) {
+            $conditions[] = array('idsite', '=', $idSite);
+        }
+
+        $logsDeleted = 0;
+        $logPurger = $this;
+        $this->rawLogDao->forAllLogs('log_visit', $fields, $conditions, $iterationStep, function ($logs) use ($logPurger, &$logsDeleted, $afterChunkDeleted) {
+            $ids = array_map(function ($row) { return reset($row); }, $logs);
+            $logsDeleted += $logPurger->deleteVisits($ids);
+
+            if (!empty($afterChunkDeleted)) {
+                $afterChunkDeleted($logsDeleted);
+            }
+        });
+
+        return $logsDeleted;
+    }
+}