54 lines
1.4 KiB
Go
54 lines
1.4 KiB
Go
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package utils
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import (
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"fmt"
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"github.com/gogf/gf/v2/errors/gcode"
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"github.com/gogf/gf/v2/errors/gerror"
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"reflect"
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"time"
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)
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// ValidStructPtr 验证是否为结构体指针
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func ValidStructPtr(req any) (err error) {
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//验证请求参数必须为指针
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var (
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reflectValue reflect.Value
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reflectKind reflect.Kind
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)
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if v, ok := req.(reflect.Value); ok {
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reflectValue = v
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} else {
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reflectValue = reflect.ValueOf(req)
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}
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reflectKind = reflectValue.Kind()
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if reflectKind != reflect.Ptr {
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err = gerror.NewCode(gcode.CodeInvalidParameter, `the parameter "req" for function Find should type of *struct/*[]struct`)
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}
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return
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}
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// GetMonthToday 获取N个月前的某日
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func GetMonthToday(t time.Time, month int) time.Time {
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// today
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fmt.Printf("today: [%s]\n", t)
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// 判断天数范围 小于等于28天的计算,覆盖大多数情况
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if t.Day() <= 28 {
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return t.AddDate(0, -month, 0)
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}
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// 月份的天数数组
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monthDay := [13]int{0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31}
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// 计算目标所在日期
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target := t.AddDate(0, 0, 1-t.Day()).AddDate(0, -month, 0)
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// 计算当月最大天数
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targetDay := monthDay[target.Month()]
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// 计算闰年
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if target.Month() == time.February && (target.Year()%400 == 0 || (target.Year()%100 != 0 && target.Year()%4 == 0)) {
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targetDay++
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}
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if t.Day() > targetDay {
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return target.AddDate(0, 0, targetDay-1)
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}
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return target.AddDate(0, 0, t.Day()-1)
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}
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