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<?php |
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/** |
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* eduVPN - End-user friendly VPN. |
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* |
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* Copyright: 2016-2017, The Commons Conservancy eduVPN Programme |
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* SPDX-License-Identifier: AGPL-3.0+ |
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*/ |
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namespace SURFnet\VPN\Server; |
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use DateTime; |
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class Stats |
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{ |
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/** @var \DateTime */ |
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private $now; |
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public function __construct(DateTime $now) |
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{ |
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$this->now = $now; |
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} |
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public function get(array $logEntries) |
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{ |
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$statsData = []; |
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$timeConnection = []; |
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$uniqueUsers = []; |
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$activeUserCount = 0; |
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foreach ($logEntries as $entry) { |
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$userId = $entry['user_id']; |
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$connectedAt = $entry['connected_at']; |
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$disconnectedAt = $entry['disconnected_at']; |
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$connectedAtDateTime = new DateTime($entry['connected_at']); |
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$dateOfConnection = $connectedAtDateTime->format('Y-m-d'); |
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if (!array_key_exists($dateOfConnection, $statsData)) { |
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$statsData[$dateOfConnection] = [ |
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'number_of_connections' => 0, |
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'bytes_transferred' => 0, |
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'unique_user_list' => [], |
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]; |
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} |
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if (is_null($disconnectedAt)) { |
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$activeUserCount += 1; |
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} |
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$statsData[$dateOfConnection]['number_of_connections'] += 1; |
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$statsData[$dateOfConnection]['bytes_transferred'] += $entry['bytes_transferred']; |
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// add it to table to be able to determine max concurrent connection |
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// count |
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if (!array_key_exists($connectedAt, $timeConnection)) { |
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$timeConnection[$connectedAt] = []; |
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} |
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$timeConnection[$connectedAt][] = 'C'; |
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if (!is_null($disconnectedAt)) { |
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if (!array_key_exists($disconnectedAt, $timeConnection)) { |
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$timeConnection[$disconnectedAt] = []; |
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} |
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$timeConnection[$disconnectedAt][] = 'D'; |
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} |
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// unique user list per day |
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if (!in_array($userId, $statsData[$dateOfConnection]['unique_user_list'])) { |
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$statsData[$dateOfConnection]['unique_user_list'][] = $userId; |
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} |
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// unique user list for the whole logging period |
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if (!in_array($userId, $uniqueUsers)) { |
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$uniqueUsers[] = $userId; |
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} |
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} |
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ksort($timeConnection); |
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$maxConcurrentConnections = 0; |
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$maxConcurrentConnectionsTime = 0; |
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$concurrentConnections = 0; |
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foreach ($timeConnection as $unixTime => $eventArray) { |
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foreach ($eventArray as $event) { |
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if ('C' === $event) { |
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++$concurrentConnections; |
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if ($concurrentConnections > $maxConcurrentConnections) { |
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$maxConcurrentConnections = $concurrentConnections; |
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$maxConcurrentConnectionsTime = $unixTime; |
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} |
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} else { |
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--$concurrentConnections; |
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} |
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} |
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} |
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$totalTraffic = 0; |
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// convert the user list in unique user count for that day, rework array |
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// key and determine total amount of traffic |
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foreach ($statsData as $date => $entry) { |
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$statsData[$date]['date'] = $date; |
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$statsData[$date]['unique_user_count'] = count($entry['unique_user_list']); |
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unset($statsData[$date]['unique_user_list']); |
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$totalTraffic += $entry['bytes_transferred']; |
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} |
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return [ |
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'days' => array_values($statsData), |
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'total_traffic' => $totalTraffic, |
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'generated_at' => $this->now->getTimestamp(), |
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'max_concurrent_connections' => $maxConcurrentConnections, |
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'max_concurrent_connections_time' => $maxConcurrentConnectionsTime, |
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'unique_user_count' => count($uniqueUsers), |
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'active_user_count' => $activeUserCount, |
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]; |
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} |
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} |
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eduVPN /
vpn-server-api
