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helper.go
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helper.go
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package logic
import (
"fmt"
"github.com/RoaringBitmap/roaring/roaring64"
"github.com/weblfe/bitmap_service/api/model"
"time"
)
const (
dayName = "日"
secondDayName = "次"
weekName = "周"
monthName = "30天"
yearName = "年"
keeperName = "留存"
)
func GetUserDayKeep(userArr [][]uint64) (float32, int, int) {
var (
bits = make([][]uint64, 2)
keepBitMapArr []*roaring64.Bitmap
)
for i, users := range userArr {
bits[i] = make([]uint64, cap(users))
for _, id := range users {
bits[i] = append(bits[i], uint64(id))
}
it := roaring64.BitmapOf(bits[i]...)
it.RunOptimize()
keepBitMapArr = append(keepBitMapArr, it)
}
// bitmap
return GetUserDayKeepByBitmapArr(keepBitMapArr)
}
func GetUserDayKeepByBitmapArr(userBitmapArr []*roaring64.Bitmap) (keep float32, total int, left int) {
var (
n uint64 = 0
l uint64 = 0
)
if userBitmapArr == nil {
return keep, int(n), int(l)
}
// bitmap
if len(userBitmapArr) >= 2 {
//fmt.Println(fmt.Sprintf("first-day:%d", count64(userBitmapArr[0].ToArray())))
n = userBitmapArr[1].GetCardinality()
// fmt.Println(fmt.Sprintf("first-day:%d", userBitmapArr[1].GetCardinality()))
if n != 0 {
// 交集合
userBitmapArr[0].And(userBitmapArr[1])
if userBitmapArr[0] != nil {
l = userBitmapArr[0].GetCardinality()
// fmt.Println(fmt.Sprintf("last-day:%d", count64(userBitmapArr[0].ToArray())))
// fmt.Println(fmt.Sprintf("last-day:%d", l))
keep = float32(l) / float32(n) * 100
// fmt.Println(fmt.Sprintf("keep:%.2f", keep))
}
}
}
return keep, int(n), int(l)
}
func getName(date string, day int64, channel string) string {
var d, err = time.Parse(model.DateFormat, date)
if err != nil {
return ""
}
if channel == "" {
return fmt.Sprintf("%s (%s) "+keeperName, transformDay(day), d.Add(-time.Hour*24*time.Duration(day)).Format(model.DateFormat))
}
return fmt.Sprintf("%s-%s (%s) "+keeperName, channel, transformDay(day), d.Add(-time.Hour*24*time.Duration(day)).Format(model.DateFormat))
}
func transformDay(day int64) string {
// %d天
switch day {
case 1:
return secondDayName
case 7:
return weekName
case 30:
return monthName
case 360:
return yearName
}
return fmt.Sprintf("%d%s", day, dayName)
}
func count(arr []uint32) int {
var n = 0
for _, v := range arr {
if v > 0 {
n++
}
}
return n
}
func count64(arr []uint64) int {
var n = 0
for _, v := range arr {
if v > 0 {
n++
}
}
return n
}