stats.go

package listennotes

import (
	"net/http"
	"strconv"
	"time"
)

// ResponseStatistics will contain the stats information provided by API response headers
type ResponseStatistics struct {
	FreeQuota       int
	Usage           int
	LatencySeconds  float64
	NextBillingDate time.Time
}

func parseStats(resp *http.Response) ResponseStatistics {
	// Do not allow this to fail, just return null values if we cannot parse the response.
	// We do this so that a POST that succeeds does not return an unrelated error.

	stats := ResponseStatistics{}

	if freeQuota, err := strconv.Atoi(resp.Header.Get(ResponseHeaderKeyFreeQuota)); err == nil {
		stats.FreeQuota = freeQuota
	}
	if usage, err := strconv.Atoi(resp.Header.Get(ResponseHeaderKeyUsage)); err == nil {
		stats.Usage = usage
	}
	if latency, err := strconv.ParseFloat(resp.Header.Get(ResponseHeaderKeyLatencySeconds), 64); err == nil {
		stats.LatencySeconds = latency
	}

	if nextBill, err := time.Parse(TimeFormat, resp.Header.Get(ResponseHeaderKeyNextBillingDate)); err == nil {
		stats.NextBillingDate = nextBill
	}

	return stats
}