321 lines
12 KiB
PHP
321 lines
12 KiB
PHP
<?php
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/**
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* PHP Server Monitor
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* Monitor your servers and websites.
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*
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* This file is part of PHP Server Monitor.
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* PHP Server Monitor is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* PHP Server Monitor is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with PHP Server Monitor. If not, see <http://www.gnu.org/licenses/>.
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*
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* @package phpservermon
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* @author Jérôme Cabanis <http://lauraly.com>
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* @author Pepijn Over <pep@mailbox.org>
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* @copyright Copyright (c) 2008-2017 Pepijn Over <pep@mailbox.org>
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* @license http://www.gnu.org/licenses/gpl.txt GNU GPL v3
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* @version Release: @package_version@
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* @link http://www.phpservermonitor.org/
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**/
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namespace psm\Util\Server;
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use psm\Service\Database;
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/**
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* History util, create HTML for server graphs
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*/
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class HistoryGraph
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{
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/**
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* Database service
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* @var \psm\Service\Database $db;
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*/
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protected $db;
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/**
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* Twig environment
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* @var \Twig_Environment $twig
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*/
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protected $twig;
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public function __construct(Database $db, \Twig_Environment $twig)
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{
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$this->db = $db;
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$this->twig = $twig;
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}
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/**
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* Prepare the HTML for the graph
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* @return string
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*/
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public function createHTML($server_id)
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{
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// Archive all records for this server to make sure we have up-to-date stats
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$archive = new ArchiveManager($this->db);
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$archive->archive($server_id);
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$now = new \DateTime();
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$last_week = new \DateTime('-1 week 0:0:0');
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$last_year = new \DateTime('-1 year -1 week 0:0:0');
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$graphs = array(
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0 => $this->generateGraphUptime($server_id, $last_week, $now),
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1 => $this->generateGraphHistory($server_id, $last_year, $last_week),
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);
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$info_fields = array(
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'latency_avg' => '%01.4f',
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'uptime' => '%01.3f%%',
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);
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foreach ($graphs as $i => &$graph) {
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// add subarray for info fields
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$graph['info'] = array();
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foreach ($info_fields as $field => $format) {
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if (!isset($graph[$field])) {
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continue;
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}
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$graph['info'][] = array(
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'label' => psm_get_lang('servers', $field),
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'value' => sprintf($format, $graph[$field]),
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);
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}
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}
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$tpl_data = array(
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'graphs' => $graphs,
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);
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return $this->twig->render('module/server/history.tpl.html', $tpl_data);
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}
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/**
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* Generate data for uptime graph
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* @param int $server_id
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* @param \DateTime $start_time Lowest DateTime of the graph
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* @param \DateTime $end_time Highest DateTime of the graph
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* @return array
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*/
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public function generateGraphUptime($server_id, $start_time, $end_time)
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{
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$lines = array(
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'latency' => array(),
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);
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$hour = new \DateTime('-1 hour');
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$day = new \DateTime('-1 day');
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$week = new \DateTime('-1 week');
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$records = $this->getRecords('uptime', $server_id, $start_time, $end_time);
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$data = $this->generateGraphLines($records, $lines, 'latency', $hour, $end_time, true);
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$data['title'] = psm_get_lang('servers', 'chart_last_week');
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$data['id'] = 'history_short';
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$data['unit'] = 'minute';
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$data['buttons'] = array();
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$data['button_name'] = 'timeframe_short';
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$data['buttons'][] = array(
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'unit' => 'minute',
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'time' => $hour->getTimestamp() * 1000,
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'label' => psm_get_lang('servers', 'hour'),
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'class_active' => 'active'
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);
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$data['buttons'][] = array(
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'unit' => 'hour',
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'time' => $day->getTimestamp() * 1000,
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'label' => psm_get_lang('servers', 'day')
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);
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$data['buttons'][] = array(
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'unit' => 'day',
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'time' => $week->getTimestamp() * 1000,
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'label' => psm_get_lang('servers', 'week')
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);
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return $data;
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}
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/**
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* Generate data for history graph
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* @param int $server_id
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* @param \DateTime $start_time Lowest DateTime of the graph
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* @param \DateTime $end_time Highest DateTime of the graph
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* @return array
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*/
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public function generateGraphHistory($server_id, $start_time, $end_time)
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{
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$lines = array(
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'latency_min' => array(),
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'latency_avg' => array(),
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'latency_max' => array(),
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);
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$week = new \DateTime('-2 week 0:0:0');
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$month = new \DateTime('-1 month -1 week 0:0:0');
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$year = new \DateTime('-1 year -1 week 0:0:0');
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$records = $this->getRecords('history', $server_id, $year, $end_time);
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// dont add uptime for now because we have no way to calculate accurate uptimes for archived records
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$data = $this->generateGraphLines($records, $lines, 'latency_avg', $start_time, $end_time, false);
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$data['title'] = psm_get_lang('servers', 'chart_history');
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$data['id'] = 'history_long';
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$data['unit'] = 'week';
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$data['buttons'] = array();
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$data['button_name'] = 'timeframe_long';
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$data['buttons'][] = array(
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'unit' => 'day',
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'time' => $week->getTimestamp() * 1000,
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'label' => psm_get_lang('servers', 'week')
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);
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$data['buttons'][] = array(
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'unit' => 'week',
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'time' => $month->getTimestamp() * 1000,
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'label' => psm_get_lang('servers', 'month'),
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'class_active' => 'active'
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);
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$data['buttons'][] = array(
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'unit' => 'month',
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'time' => $year->getTimestamp() * 1000,
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'label' => psm_get_lang('servers', 'year')
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);
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return $data;
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}
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/**
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* Get all uptime/history records for a server
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* @param string $type
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* @param int $server_id
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* @param \DateTime $start_time Lowest DateTime of the graph
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* @param \DateTime $end_time Highest DateTime of the graph
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* @return array
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*/
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protected function getRecords($type, $server_id, $start_time, $end_time)
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{
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if (!in_array($type, array('history', 'uptime'))) {
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return array();
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}
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$records = $this->db->execute(
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"SELECT *
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FROM `" . PSM_DB_PREFIX . "servers_$type`
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WHERE `server_id` = :server_id AND `date` BETWEEN :start_time AND :end_time ORDER BY `date` ASC",
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array(
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'server_id' => $server_id,
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'start_time' => $start_time->format('Y-m-d H:i:s'),
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'end_time' => $end_time->format('Y-m-d H:i:s'),
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)
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);
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return $records;
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}
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/**
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* Generate data arrays for graphs
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* @param array $records All uptime records to parse, MUST BE SORTED BY DATE IN ASCENDING ORDER
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* @param array $lines Array with keys as line ids to prepare (key must be available in uptime records)
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* @param string $latency_avg_key which key from uptime records to use for calculating averages
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* @param \DateTime $start_time Lowest DateTime of the graph
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* @param \DateTime $end_time Highest DateTime of the graph
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* @param boolean $add_uptime Add uptime calculation?
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* @param array $prev Previous result
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* @param int $downtime Total downtime
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* @param int $prev_downtime Timestamp from last offline record. 0 when last record is uptime
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* @return array
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*/
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protected function generateGraphLines(
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$records,
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$lines,
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$latency_avg_key,
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$start_time,
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$end_time,
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$add_uptime = false
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) {
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$now = new \DateTime();
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$data = array();
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// PLEASE NOTE: all times are in microseconds! because of javascript.
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$latency_avg = 0;
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$prev = reset($records);
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$prev_downtime = 0;
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$downtime = 0;
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// Create the list of points and server down zones
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foreach ($records as $record) {
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$time = strtotime($record['date']);
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// use the first line to calculate average latency
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$latency_avg += (float) $record[$latency_avg_key];
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foreach ($lines as $key => $value) {
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// add the value for each of the different lines
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if (isset($record[$key])) {
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if (isset($record['status'])) {
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// down
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if ($record['status'] == 0) {
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$lines['online'][] = $prev['status']
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// Previous datapoint was online
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? '{ x: ' . ($time * 1000) . ', y: ' . $prev['latency'] . '}'
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// Previous datapoint was offline
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: '{ x: ' . ($time * 1000) . ', y: null}';
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// new outage start
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$lines['offline'][] = '{ x: ' . ($time * 1000) . ', y:0.1}';
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$prev_downtime != 0 ?: $prev_downtime = $time;
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} else {
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// up
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// outage ends
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$lines['offline'][] = $prev['status']
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// Previous datapoint was online
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? '{ x: ' . ($time * 1000) . ', y:null}'
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// Previous datapoint was offline
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: '{ x: ' . ($time * 1000) . ', y:0.1}';
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$lines['online'][] = '{ x: ' . ($time * 1000) . ', y: ' .
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round((float) $record[$key], 4) . '}';
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$prev_downtime == 0 ?: $downtime += ($time - $prev_downtime);
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$prev_downtime = 0;
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}
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} else {
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$lines[$key][] = '{ x: \'' . $record['date'] . '\', y: ' . $record[$key] . '}';
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}
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$prev = $record;
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}
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}
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}
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// Was down before.
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// Record the first and last date as a string in the down array
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$prev_downtime == 0 ?: $downtime += ($now->getTimestamp() - $prev_downtime);
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if ($add_uptime) {
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$prev['status'] ?: $lines['offline'][] = '{ x: ' . ($now->getTimestamp() * 1000) . ', y:0.1}';
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$data['uptime'] = 100 - ($downtime / ($end_time->getTimestamp() - $start_time->getTimestamp()));
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}
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$lines_merged = array();
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foreach ($lines as $line_key => $line_value) {
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if (empty($line_value)) {
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continue;
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}
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$lines_merged[$line_key]['value'] = implode(', ', $line_value);
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$lines_merged[$line_key]['name'] = psm_get_lang('servers', $line_key);
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}
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$data['latency_avg'] = count($records) > 0 ? ($latency_avg / count($records)) : 0;
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$data['lines'] = sizeof($lines_merged) ? $lines_merged : '';
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$data['end_timestamp'] = number_format($end_time->getTimestamp(), 0, '', '') * 1000;
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$data['start_timestamp'] = number_format($start_time->getTimestamp(), 0, '', '') * 1000;
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return $data;
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}
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}
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