/
numkey.go
209 lines (184 loc) · 4.58 KB
/
numkey.go
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package router
import (
"fmt"
"github.com/fengleng/flight/server/my_errors"
//"github.com/pingcap/my_errors"
"math"
"strconv"
"strings"
"time"
)
const (
MinNumKey = math.MinInt64
MaxNumKey = math.MaxInt64
)
//[start,end)
type NumKeyRange struct {
Start int64
End int64
}
func (kr NumKeyRange) MapKey() string {
return fmt.Sprintf("%d-%d", kr.Start, kr.End)
}
func (kr NumKeyRange) Contains(i int64) bool {
return kr.Start <= i && (kr.End == MaxNumKey || i < kr.End)
}
func (kr NumKeyRange) String() string {
return fmt.Sprintf("{Start: %d, End: %d}", kr.Start, kr.End)
}
func ParseNumSharding(Locations []int, TableRowLimit int) ([]NumKeyRange, error) {
tableCount := 0
length := len(Locations)
for i := 0; i < length; i++ {
tableCount += Locations[i]
}
ranges := make([]NumKeyRange, tableCount)
for i := 0; i < tableCount; i++ {
ranges[i].Start = int64(i * TableRowLimit)
ranges[i].End = int64((i + 1) * TableRowLimit)
}
return ranges, nil
}
// ParseDayRange return date of daynumber by order
//20151201-20151205
//20151201,20151202,20151203,20151204,20151205
func ParseDayRange(dateRange string) ([]int, error) {
timeFormat := "20060102"
dateDays := make([]int, 0)
dateLength := 8
dateTmp := strings.SplitN(dateRange, "-", 2)
if len(dateTmp) == 1 {
if len(dateTmp[0]) != dateLength {
return nil, my_errors.ErrDateRangeIllegal
}
dateNum, err := strconv.Atoi(dateTmp[0])
if err != nil {
return nil, err
}
return []int{dateNum}, nil
}
if len(dateTmp) != 2 {
return nil, my_errors.ErrDateRangeIllegal
}
if len(dateTmp[0]) != dateLength || len(dateTmp[1]) != dateLength {
return nil, my_errors.ErrDateRangeIllegal
}
//change the begin day and the end day
if dateTmp[1] < dateTmp[0] {
dateTmp[0], dateTmp[1] = dateTmp[1], dateTmp[0]
}
begin, err := time.Parse(timeFormat, dateTmp[0])
if err != nil {
return nil, err
}
end, err := time.Parse(timeFormat, dateTmp[1])
if err != nil {
return nil, err
}
duration := end.Sub(begin)
daysCount := int(duration.Hours() / 24)
for i := 0; i <= daysCount; i++ {
date := begin.Add(time.Hour * time.Duration(24*i))
dateStr := date.Format("20060102")
dateNum, err := strconv.Atoi(dateStr)
if err != nil {
return nil, err
}
dateDays = append(dateDays, dateNum)
}
return dateDays, nil
}
//return date of month by order
//201510-201512
//201510,201511,201512
func ParseMonthRange(dateRange string) ([]int, error) {
dateMonth := make([]int, 0)
dateLength := 6
dateTmp := strings.SplitN(dateRange, "-", 2)
if len(dateTmp) == 1 {
if len(dateTmp[0]) != dateLength {
return nil, my_errors.ErrDateRangeIllegal
}
dateNum, err := strconv.Atoi(dateTmp[0])
if err != nil {
return nil, err
}
return []int{dateNum}, nil
}
if len(dateTmp) != 2 {
return nil, my_errors.ErrDateRangeIllegal
}
if len(dateTmp[0]) != dateLength || len(dateTmp[1]) != dateLength {
return nil, my_errors.ErrDateRangeIllegal
}
//change the begin month and the end month
if dateTmp[1] < dateTmp[0] {
dateTmp[0], dateTmp[1] = dateTmp[1], dateTmp[0]
}
beginYear, err := strconv.Atoi(dateTmp[0][:4])
if err != nil {
return nil, err
}
beginMonth, err := strconv.Atoi(dateTmp[0][4:])
if err != nil {
return nil, err
}
endYear, err := strconv.Atoi(dateTmp[1][:4])
if err != nil {
return nil, err
}
endMonth, err := strconv.Atoi(dateTmp[1][4:])
if err != nil {
return nil, err
}
// how many months between the two date
monthCount := (endYear-beginYear)*12 + endMonth - beginMonth + 1
monthTmp := beginMonth
for i := 0; i < monthCount; i++ {
if 12 < monthTmp {
monthTmp = monthTmp % 12
beginYear++
}
monthNum := beginYear*100 + monthTmp
dateMonth = append(dateMonth, monthNum)
monthTmp++
}
return dateMonth, nil
}
//return date of year by order
//2013-2015
//2013,2014,2015
func ParseYearRange(dateRange string) ([]int, error) {
dateYear := make([]int, 0)
dateLength := 4
dateTmp := strings.SplitN(dateRange, "-", 2)
if len(dateTmp) == 1 {
if len(dateTmp[0]) != dateLength {
return nil, my_errors.ErrDateRangeIllegal
}
dateNum, err := strconv.Atoi(dateTmp[0])
if err != nil {
return nil, err
}
return []int{dateNum}, nil
}
if len(dateTmp) != 2 {
return nil, my_errors.ErrDateRangeIllegal
}
//change the begin year and the end year
if dateTmp[1] < dateTmp[0] {
dateTmp[0], dateTmp[1] = dateTmp[1], dateTmp[0]
}
beginYear, err := strconv.Atoi(dateTmp[0])
if err != nil {
return nil, err
}
endYear, err := strconv.Atoi(dateTmp[1])
if err != nil {
return nil, err
}
for i := beginYear; i <= endYear; i++ {
dateYear = append(dateYear, i)
}
return dateYear, nil
}