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msd2/tracking/piwik/plugins/UsersManager/LastSeenTimeLogger.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\Plugins\UsersManager;
+
+use Piwik\Common;
+use Piwik\Option;
+use Piwik\Piwik;
+
+/**
+ * Class that logs the time the current user is accessing the current resource (which
+ * is 'now') so it can be retrieved later.
+ */
+class LastSeenTimeLogger
+{
+    const OPTION_PREFIX = 'UsersManager.lastSeen.';
+
+    /**
+     * The amount of time in seconds that a last seen value is considered valid. We don't want
+     * to update the database for every request made by every user, so we only do it if the time
+     * has been at least this many seconds from the last known time.
+     */
+    const LAST_TIME_SAVE_DELTA = 300;
+
+    /**
+     * Saves the current time for a user as an option if the current request is for something
+     * in the reporting UI, the current user is not anonymous and the time hasn't been saved
+     * in the last 5 minutes.
+     */
+    public function logCurrentUserLastSeenTime()
+    {
+        $module = Common::getRequestVar('module', false);
+        $currentUserLogin = Piwik::getCurrentUserLogin();
+
+        // only log time for non-anonymous visits to the reporting UI
+        if ($module == 'API'
+            || $module == 'Proxy'
+            || Piwik::isUserIsAnonymous()
+        ) {
+            return;
+        }
+
+        // get the last known time
+        $optionName = self::OPTION_PREFIX . $currentUserLogin;
+        $lastSeen = Option::get($optionName);
+
+        // do not log if last known time is less than N minutes from now (so we don't make too many
+        // queries)
+        if (time() - $lastSeen <= self::LAST_TIME_SAVE_DELTA) {
+            return;
+        }
+
+        // log last seen time (Note: autoload is important so the Option::get above does not result in
+        // a separate query)
+        Option::set($optionName, time(), $autoload = 1);
+    }
+
+    /**
+     * Returns the time a user was last seen or `false` if the user has never logged in.
+     */
+    public static function getLastSeenTimeForUser($userName)
+    {
+        $optionName = self::OPTION_PREFIX . $userName;
+        return Option::get($optionName);
+    }
+
+    public static function getLastSeenTimesForAllUsers()
+    {
+        $results = [];
+        foreach (Option::getLike(self::OPTION_PREFIX . '%') as $name => $value) {
+            preg_match('/^' . preg_quote(self::OPTION_PREFIX) . '(.*)$/', $name, $matches);
+            if (isset($matches[1])) {
+                $results[$matches[1]] = $value;
+            }
+        }
+        return $results;
+    }
+}