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<?php
namespace Krenor\Prometheus\Renderer;
use Krenor\Prometheus\Sample;
use Tightenco\Collect\Support\Collection;
use Krenor\Prometheus\MetricFamilySamples;
use Krenor\Prometheus\Contracts\Renderable;
class TextRenderer implements Renderable
{
/**
* {@inheritdoc}
*/
public function render(Collection $metrics): string
$text = $metrics->flatMap(function (MetricFamilySamples $family) {
return $this->transform($family);
})->implode("\n");
return "{$text}\n";
}
* @param Collection $labels
*
* @return string
protected function serialize(Collection $labels): string
$quoted = $labels->map(function (string $value) {
return "\"{$value}\"";
});
$serialized = urldecode(
http_build_query($quoted->toArray(), '', ',')
);
return !$serialized
? $serialized
: "{{$serialized}}";
* @param MetricFamilySamples $family
* @return Collection
protected function transform(MetricFamilySamples $family): Collection
$metric = $family->metric();
$lines = new Collection([
"# HELP {$metric->key()} {$metric->description()}",
"# TYPE {$metric->key()} {$metric->type()}",
]);
$metrics = $family->samples()->map(function (Sample $sample) {
return "{$sample->name()}{$this->serialize($sample->labels())} {$sample->value()}";
})->values();
return $lines->merge($metrics);
krenor /
prometheus-client
