1 files changed, 111 insertions, 0 deletions
diff --git a/library/Graphite/Util/TimeRangePickerTools.php b/library/Graphite/Util/TimeRangePickerTools.php
new file mode 100644
index 0000000..d1ebc75
--- /dev/null
+++ b/library/Graphite/Util/TimeRangePickerTools.php
@@ -0,0 +1,111 @@
+<?php
+
+namespace Icinga\Module\Graphite\Util;
+
+use Icinga\Application\Config;
+use Icinga\Exception\ConfigurationError;
+use Icinga\Web\Url;
+use Icinga\Web\UrlParams;
+
+final class TimeRangePickerTools
+{
+    /**
+     * @return string
+     */
+    public static function getRelativeRangeParameter()
+    {
+        return 'graph_range';
+    }
+
+    /**
+     * @return string[]
+     */
+    public static function getAbsoluteRangeParameters()
+    {
+        return ['start' => 'graph_start', 'end' => 'graph_end'];
+    }
+
+    /**
+     * @return string[]
+     */
+    public static function getAllRangeParameters()
+    {
+        return array_values(array_merge([static::getRelativeRangeParameter()], static::getAbsoluteRangeParameters()));
+    }
+
+    /**
+     * Copy {@link getAllRangeParameters()} from one {@link UrlParams} instance to another
+     *
+     * @param   UrlParams|null  $copy   Defaults to a new instance
+     * @param   UrlParams|null  $origin Defaults to the current request's params
+     *
+     * @return  UrlParams               The copy
+     */
+    public static function copyAllRangeParameters(UrlParams $copy = null, UrlParams $origin = null)
+    {
+        if ($origin === null) {
+            $origin = Url::fromRequest()->getParams();
+        }
+        if ($copy === null) {
+            $copy = new UrlParams();
+        }
+
+        foreach (self::getAllRangeParameters() as $param) {
+            $value = $origin->get($param);
+            if ($value !== null) {
+                $copy->set($param, $value);
+            }
+        }
+
+        return $copy;
+    }
+
+    /**
+     * Extract the relative time range (if any) from the given URL parameters
+     *
+     * @param   UrlParams   $params
+     *
+     * @return  bool|int|null
+     */
+    public static function getRelativeSeconds(UrlParams $params)
+    {
+        $seconds = $params->get(self::getRelativeRangeParameter());
+        if ($seconds === null) {
+            return null;
+        }
+
+        return preg_match('/^(?:0|[1-9]\d*)$/', $seconds) ? (int) $seconds : false;
+    }
+
+    /**
+     * Get the default relative time range for graphs
+     *
+     * @return int
+     *
+     * @throws ConfigurationError
+     */
+    public static function getDefaultRelativeTimeRange()
+    {
+        $rangeFactors = [
+            'minutes'   => 60,
+            'hours'     => 3600,
+            'days'      => 86400,
+            'weeks'     => 604800,
+            'months'    => 2592000,
+            'years'     => 31557600
+        ];
+
+        $config = Config::module('graphite');
+        $unit = $config->get('ui', 'default_time_range_unit', 'hours');
+
+        if (! isset($rangeFactors[$unit])) {
+            throw new ConfigurationError(
+                'Bad ui.default_time_range_unit %s in file %s',
+                var_export($unit, true),
+                var_export($config->getConfigFile(), true)
+            );
+        }
+
+        return (int) $config->get('ui', 'default_time_range', 1) * $rangeFactors[$unit];
+    }
+}