Simple Librato client for PHP

LibratoClient.php

<?php
class LibratoClient
{
    protected $user;

    protected $token;

    protected $metrics;

    public function __construct($user, $token)
    {
        $this->user = $user;
        $this->token = $token;

        $this->resetMetrics();
    }

    public function __destruct()
    {
        $this->flush();
    }

    public function gauge($name, $value, array $opts = [])
    {
        $this->addMetric('gauges', $name, $value, $opts);
    }

    public function count($name, $value, array $opts = [])
    {
        $this->addMetric('counters', $name, $value, $opts);
    }

    public function addMetric($type, $name, $value, array $opts = [])
    {
        $this->metrics[$type][] = array_merge($opts, ['name' => $name, 'value' => $value]);
    }

    // flushes to librato server
    public function flush()
    {
        $ch = curl_init("https://metrics-api.librato.com/v1/metrics");

        curl_setopt($ch, CURLOPT_HTTPHEADER, ["Content-Type: application/json"]);
        curl_setopt($ch, CURLOPT_POST, true);
        curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($this->metrics));
        curl_setopt($ch, CURLOPT_USERPWD, sprintf("%s:%s", $this->user, $this->token));
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

        curl_exec($ch);

        // TODO: $http_status = curl_getinfo($ch, CURLINFO_HTTP_CODE);

        curl_close($ch);

        $this->resetMetrics();
    }

    protected function resetMetrics()
    {
        $this->metrics = ['gauges' => [], 'counters' => []];
    }
}