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<?php
namespace Krenor\Prometheus\Contracts;
use Krenor\Prometheus\Sample;
use Tightenco\Collect\Support\Collection;
abstract class SamplesBuilder
{
/**
* @var Metric
*/
protected $metric;
* @var Collection
protected $items;
* SamplesCollector constructor.
*
* @param Metric $metric
* @param Collection $items
public function __construct(Metric $metric, Collection $items)
$this->metric = $metric;
$this->items = $items;
}
* @return Collection|Sample[]
public function samples(): Collection
return $this
->parse()
->map(function (array $data) {
return new Sample(
$data['name'],
$data['value'],
new Collection($data['labels'])
);
});
* @return Collection
protected function parse(): Collection
$name = $this->metric->key();
$labels = $this->metric->labels()->toArray();
if (empty($labels) && $this->items->isEmpty()) {
return (new Collection)
->push(['value' => 0] + compact('name', 'labels'));
->items
->map(function ($value, string $field) use ($name) {
// Merge stored fields with the value and name to an array.
return compact('name', 'value') + json_decode($field, true);
})->reject(function (array $data) use ($labels) {
// Filter out items lacking the key "labels" or where labels names don't match.
return !array_key_exists('labels', $data)
?: array_keys($data['labels']) !== $labels;
})->sortBy('labels')
->values();
krenor /
prometheus-client
