46 lines
1.2 KiB
PHP
46 lines
1.2 KiB
PHP
<?php namespace Clockwork\Helpers;
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use Clockwork\Request\Request;
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// Generates Server-Timing header value
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class ServerTiming
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{
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// Performance metrics to include
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protected $metrics = [];
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// Add a performance metric
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public function add($metric, $value, $description)
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{
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$this->metrics[] = [ 'metric' => $metric, 'value' => $value, 'description' => $description ];
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return $this;
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}
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// Generate the header value
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public function value()
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{
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return implode(', ', array_map(function ($metric) {
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return "{$metric['metric']}; dur={$metric['value']}; desc=\"{$metric['description']}\"";
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}, $this->metrics));
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}
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// Create a new instance from a Clockwork request
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public static function fromRequest(Request $request, $eventsCount = 10)
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{
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$header = new static;
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$header->add('app', $request->getResponseDuration(), 'Application');
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if ($request->getDatabaseDuration()) {
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$header->add('db', $request->getDatabaseDuration(), 'Database');
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}
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// add timeline events limited to a set number so the header doesn't get too large
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foreach (array_slice($request->timeline()->events, 0, $eventsCount) as $i => $event) {
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$header->add("timeline-event-{$i}", $event->duration(), $event->description);
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}
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return $header;
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}
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}
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