Zabbix

<?php

/*

** Zabbix

** Copyright (C) 2001-2022 Zabbix SIA

**

** This program is free software; you can redistribute it and/or modify

** it under the terms of the GNU General Public License as published by

** the Free Software Foundation; either version 2 of the License, or

** (at your option) any later version.

**

** This program is distributed in the hope that it will be useful,

** but WITHOUT ANY WARRANTY; without even the implied warranty of

** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

** GNU General Public License for more details.

**

** You should have received a copy of the GNU General Public License

** along with this program; if not, write to the Free Software

** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

**/

​

​

/**

 * Class calculates graph data and makes SVG graph.

 */

class CSvgGraphHelper {

​

    /**

     * Calculate graph data and draw SVG graph based on given graph configuration.

     *

     * @param array  $options                     Options for graph.

     * @param array  $options['data_sets']        Graph data set options.

     * @param int    $options['data_source']      Data source of graph.

     * @param bool   $options['dashboard_time']   True if dashboard time is used.

     * @param array  $options['time_period']      Graph time period used.

     * @param array  $options['left_y_axis']      Options for graph left Y axis.

     * @param array  $options['right_y_axis']     Options for graph right Y axis.

     * @param array  $options['x_axis']           Options for graph X axis.

     * @param array  $options['legend']           Options for graph legend.

     * @param int    $options['legend_lines']     Number of lines in the legend.

     * @param array  $options['problems']         Graph problems options.

     * @param array  $options['overrides']        Graph override options.

     *

     * @return array

     */

    public static function get(array $options, $width, $height) {

        $metrics = [];

        $errors = [];

​

        // Find which metrics will be shown in graph and calculate time periods and display options.

        self::getMetrics($metrics, $options['data_sets']);

        // Apply overrides for previously selected $metrics.

        self::applyOverrides($metrics, $options['overrides']);

        // Apply time periods for each $metric, based on graph/dashboard time as well as metric level timeshifts.

        self::getTimePeriods($metrics, $options['time_period']);

        // Find what data source (history or trends) will be used for each metric.

        self::getGraphDataSource($metrics, $errors, $options['data_source'], $width);

        // Load Data for each metric.

        self::getMetricsData($metrics, $width);

        // Load aggregated Data for each dataset.

        self::getMetricsAggregatedData($metrics);

​

        // Legend single line height is 18. Value should be synchronized with $svg-legend-line-height in 'screen.scss'.

        $legend_height = ($options['legend'] == SVG_GRAPH_LEGEND_TYPE_SHORT) ? $options['legend_lines'] * 18 : 0;