Golang 实现strtotime 字符串转换为时间戳的方法

       

           在php中，有strtotime 将字符串转换为时间戳，在Golang 中，同样可以实现类型的函数。

   

package main

import (
      "fmt"
      "time"
      "regexp"
      "strings"
      "strconv"
    )

func StartTimer(name string) func(){
   t := time.Now()
   fmt.Println(name, "started")

   return func(){
       d := time.Now().Sub(t)
       fmt.Println(name, "took", d)
       }
}


func RunTimer(){
   stop := StartTimer("run timer")

   defer stop()

   time.Sleep(1 * time.Second)
}


func strtotime(str string) int64 {

    uintToSeconds := map[string]int64{"minute" : 60, "hour" : 3600, "day" : 86400, "week" : 604800, "year" : ((365 * 86400) + 86400)}

    accumulator := time.Now().Unix()

    var delta int64
    plus := true
    str = strings.TrimSpace(str)
    
    t := time.Now()
    
    if strings.Index(str, "today") >= 0  || strings.Index(str, "this month") >= 0 || strings.Index(str, "midnight") >= 0 {
       
       accumulator -= int64(t.Second())
       accumulator -= int64(t.Minute()) * uintToSeconds["minute"]
       accumulator -= int64(t.Hour()) * uintToSeconds["hour"]
    }
    
    if strings.Index(str, "yesterday") >= 0 {
       
       str = "-1 day"
    }
    
    if strings.Index(str, "this month") >= 0 {
       
       str = "-" + strconv.Itoa(t.Day()-1) + " days"       
    }

    if strings.HasPrefix(str, "in ") {
        str = strings.Replace(str, "in ", "", 1)
    }

    if strings.Index(str, " ago") > 0 {
        str = strings.Replace(str, " ago", "", 1)
        plus = false
    }

    if strings.Index(str, "+") >= 0 {
        str = strings.Replace(str, "+", "", 1)
    }

    if strings.Index(str, "-") >= 0 {
        str = strings.Replace(str, "-", "", 1)
        plus = false
    }

    noteValMap := make(map[string]int64, 10)


    re := regexp.MustCompile(`\d+\s+(minute|hour|day|week|year)`)

    parts := re.FindAllStringSubmatch(str, -1)

    for i, _ := range parts {
        strArray := strings.Split(parts[i][0], " ")
        v, _:= strconv.Atoi(strArray[0])
        noteValMap[parts[i][1]] = int64(v)
    }

    delta = 0
    for k, v := range noteValMap {

        delta += uintToSeconds[k] * v
    }

    if plus {
        accumulator += delta
    } else {
        accumulator -= delta
    }

    return accumulator
}


func main(){
    fmt.Println("in main")
    timeStr := [...]string{"today",  "yesterday midnight", "this month",  "-1 week 3 days  30 minute", " 10 weeks 2 hours ago ", "+ 1 year 11 days 10 minutes"}


    for _, v := range timeStr {

        ts := strtotime(v)

        timeObj := time.Unix(ts, 10)

        fmt.Println(timeObj.Format("2006-01-02 15:04:05"))
    }

    RunTimer()
}

output:

2022-09-28 00:00:00
2022-09-27 00:00:00
2022-09-01 00:00:00
2022-09-18 18:08:01
2022-07-20 16:38:01
2023-10-10 18:48:01
run timer started
run timer took 1.0024019s