APIPark/module/monitor/format.go

package monitor

import (
	"fmt"
	"strconv"
	"time"
)

func formatCount(count int64) string {
	switch {
	case count < 1000:
		return strconv.FormatInt(count, 10)
	case count < 1000000:
		return fmt.Sprintf("%.1fK", float64(count)/1000)
	case count < 1000000000:
		return fmt.Sprintf("%.1fM", float64(count)/1000000)
	case count < 1000000000000:
		return fmt.Sprintf("%.1fB", float64(count)/1000000000)
	default:
		return fmt.Sprintf("%.1fT", float64(count)/1000000000000)
	}
}

func formatByte(b int64) string {
	const (
		KB = 1000
		MB = KB * 1000
		GB = MB * 1000
		TB = GB * 1000
		PB = TB * 1000
	)

	switch {
	case b < KB:
		return fmt.Sprintf("%dB", b)
	case b < MB:
		return fmt.Sprintf("%.1fKB", float64(b)/KB)
	case b < GB:
		return fmt.Sprintf("%.1fMB", float64(b)/MB)
	case b < TB:
		return fmt.Sprintf("%.1fGB", float64(b)/GB)
	case b < PB:
		return fmt.Sprintf("%.1fTB", float64(b)/TB)
	default:
		return fmt.Sprintf("%.1fPB", float64(b)/PB)
	}
}

const (
	oneMinute             = 60
	oneHour               = 3600
	oneDay                = 24 * oneHour
	tenDay                = 10 * oneDay
	oneYear               = 365 * oneDay
	bucketMinuteRetention = (7 - 1) * oneDay
	bucketHourRetention   = (90 - 1) * oneDay
	bucketDayRetention    = (5*365 - 1) * oneDay
)

// getTimeIntervalAndBucket 根据start和end来获取窗口时间间隔，窗口偏移量offset，以及使用的bucket, 查询的startTime也会格式化
func getTimeInterval(startTime, endTime time.Time) int64 {
	startToNow := time.Now().Unix() - startTime.Unix()

	//结合可使用的最小桶，根据end-start时间间隔来得出合适的桶和趋势图时间间隔
	diff := endTime.Unix() - startTime.Unix()
	if diff <= oneHour {
		return 5 * oneMinute
	} else if diff <= oneDay {

		switch {
		case startToNow <= bucketHourRetention:
			return oneHour
		case startToNow <= bucketDayRetention:
			return oneDay
		default:
			return 7 * oneDay
		}

	} else if diff <= tenDay {

		switch {
		case startToNow <= bucketHourRetention:
			return oneHour
		case startToNow <= bucketDayRetention:
			return oneDay
		default:
			return 7 * oneDay
		}

	} else {
		return 7 * oneDay
	}

}