287 lines
7.5 KiB
Go
287 lines
7.5 KiB
Go
package time
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import (
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"fmt"
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"regexp"
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"strconv"
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"strings"
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"time"
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"apigo.cc/go/cast"
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)
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// Parse 将任意类型转换为 time.Time。
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// 支持：time.Time, 时间戳 (秒/毫秒/微秒/纳秒), RFC3339, JS 格式, 中文格式等。
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// 转换失败返回当前时间 time.Now()。
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func Parse(v any) time.Time {
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if v == nil {
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return time.Now()
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}
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if tm, ok := v.(time.Time); ok {
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return tm
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}
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str := strings.TrimSpace(cast.String(v))
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if str == "" {
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return time.Now()
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}
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var tm time.Time
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var err error
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// 1. 处理纯数字 (时间戳或紧凑格式)
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if num := cast.Int64(v); num > 0 {
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// 紧凑格式解析
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switch len(str) {
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case 14: // 20060102150405
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if tm, err = time.ParseInLocation("20060102150405", str, time.Local); err == nil {
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return tm
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}
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case 8: // 20060102
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if tm, err = time.ParseInLocation("20060102", str, time.Local); err == nil {
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return tm
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}
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case 6: // 150405 或 060102
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if tm, err = time.ParseInLocation("150405", str, time.Local); err == nil {
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return tm
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}
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if tm, err = time.ParseInLocation("060102", str, time.Local); err == nil {
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return tm
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}
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}
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// 时间戳处理
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switch {
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case num < 1e10: // 秒
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return time.Unix(num, 0)
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case num < 1e13: // 毫秒
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return time.UnixMilli(num)
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case num < 1e16: // 微秒
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return time.UnixMicro(num)
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default: // 纳秒
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return time.Unix(0, num)
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}
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}
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// 2. 标准格式与常见变体
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// RFC3339 (带 T 和 Z 或偏移量)
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if strings.Contains(str, "T") {
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if tm, err = time.Parse(time.RFC3339Nano, str); err == nil {
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return tm.In(time.Local)
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}
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if tm, err = time.Parse(time.RFC3339, str); err == nil {
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return tm.In(time.Local)
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}
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// 兼容带 T 但没 Z 的情况，尝试按普通日期时间解析
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}
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// 处理分隔符：-, /, .
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if len(str) >= 10 && (str[4] == '-' || str[4] == '/' || str[4] == '.') {
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sep := str[4]
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layout := fmt.Sprintf("2006%c01%c02", sep, sep)
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// 完整日期时间
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if len(str) >= 19 {
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tsep := str[10] // 通常是 ' ' 或 'T'
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if len(str) >= 20 && str[19] == '.' {
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// 带纳秒
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if tm, err = time.ParseInLocation(layout+fmt.Sprintf("%c15:04:05.999999999", tsep), str, time.Local); err == nil {
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return tm
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}
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} else {
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if tm, err = time.ParseInLocation(layout+fmt.Sprintf("%c15:04:05", tsep), str[:19], time.Local); err == nil {
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return tm
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}
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}
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}
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// 纯日期
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if tm, err = time.ParseInLocation(layout, str[:10], time.Local); err == nil {
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return tm
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}
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}
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// 06-01-02 这种短年份格式
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if len(str) >= 8 && (str[2] == '-' || str[2] == '/' || str[2] == '.') {
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sep := str[2]
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layout := fmt.Sprintf("06%c01%c02", sep, sep)
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if len(str) >= 17 && (str[8] == ' ' || str[8] == 'T') {
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if tm, err = time.ParseInLocation(layout+fmt.Sprintf("%c15:04:05", str[8]), str[:17], time.Local); err == nil {
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return tm
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}
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}
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if tm, err = time.ParseInLocation(layout, str[:8], time.Local); err == nil {
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return tm
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}
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}
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// 3. 特殊格式：JS, HTTP, 中文
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if strings.Contains(str, "GMT") || strings.Contains(str, "CST") {
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// 简单清理 JS 冗余部分
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cleanStr := strings.SplitN(str, " (", 2)[0]
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// 统一将时区简写替换为偏移量尝试解析
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cleanStr = strings.Replace(cleanStr, "CST", "+0800", 1)
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formats := []string{
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"Mon Jan 02 2006 15:04:05 GMT-0700",
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"Mon, 02 Jan 2006 15:04:05 GMT",
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time.RFC1123Z,
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time.RFC1123,
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time.UnixDate,
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}
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for _, f := range formats {
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if tm, err = time.Parse(f, cleanStr); err == nil {
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return tm.In(time.Local)
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}
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}
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}
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// 中文格式解析
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if strings.ContainsAny(str, "年月日时点分秒") {
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return parseCN(str)
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}
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// 纯时间格式
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if strings.Contains(str, ":") {
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if tm, err = time.ParseInLocation("15:04:05.999999", str, time.Local); err == nil {
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return tm
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}
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if tm, err = time.ParseInLocation("15:04:05", str, time.Local); err == nil {
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return tm
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}
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if tm, err = time.ParseInLocation("15:04", str, time.Local); err == nil {
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return tm
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}
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}
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return time.Now()
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}
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// Format 格式化时间。
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// layout 支持: YYYY-MM-DD HH:mm:ss, YYYY/MM/DD, HH:mm 等直观格式。
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func Format(layout string, v any) string {
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tm := Parse(v)
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l := layout
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l = strings.ReplaceAll(l, "YYYY", "2006")
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l = strings.ReplaceAll(l, "YY", "06")
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l = strings.ReplaceAll(l, "MM", "01")
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l = strings.ReplaceAll(l, "M", "1")
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l = strings.ReplaceAll(l, "DD", "02")
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l = strings.ReplaceAll(l, "D", "2")
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l = strings.ReplaceAll(l, "HH", "15")
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l = strings.ReplaceAll(l, "hh", "03")
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l = strings.ReplaceAll(l, "h", "3")
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l = strings.ReplaceAll(l, "mm", "04")
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l = strings.ReplaceAll(l, "ss", "05")
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l = strings.ReplaceAll(l, "a", "pm")
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l = strings.ReplaceAll(l, "A", "PM")
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l = strings.ReplaceAll(l, "ZZ", "-0700")
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l = strings.ReplaceAll(l, "Z", "-07:00")
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return tm.Format(l)
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}
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// Add 时间加减 DSL。
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// 格式如: "+1Y-2M+3D", "+1h30m", "-1s"。
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// 单位支持: Y (年), M (月), D (天), h, m, s, ms, us, ns。
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func Add(expr string, v any) time.Time {
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tm := Parse(v)
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if expr == "" {
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return tm
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}
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i := 0
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years, months, days := 0, 0, 0
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var duration time.Duration
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for i < len(expr) {
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sign := 1
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if expr[i] == '+' {
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i++
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} else if expr[i] == '-' {
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sign = -1
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i++
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}
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j := i
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for j < len(expr) && expr[j] >= '0' && expr[j] <= '9' {
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j++
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}
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num := 1
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if j > i {
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num, _ = strconv.Atoi(expr[i:j])
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}
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val := num * sign
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i = j
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unit := ""
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// 匹配双字符单位 (ms, us, ns)
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if i+2 <= len(expr) {
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u2 := expr[i : i+2]
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if u2 == "ms" || u2 == "us" || u2 == "ns" {
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unit = u2
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i += 2
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}
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}
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// 匹配单字符单位
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if unit == "" && i < len(expr) {
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unit = expr[i : i+1]
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i++
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}
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switch unit {
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case "Y": years += val
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case "M": months += val
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case "D": days += val
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case "h": duration += time.Duration(val) * time.Hour
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case "m": duration += time.Duration(val) * time.Minute
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case "s": duration += time.Duration(val) * time.Second
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case "ms": duration += time.Duration(val) * time.Millisecond
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case "us": duration += time.Duration(val) * time.Microsecond
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case "ns": duration += time.Duration(val) * time.Nanosecond
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default:
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// 默认秒
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duration += time.Duration(val) * time.Second
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}
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}
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if years != 0 || months != 0 || days != 0 {
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tm = tm.AddDate(years, months, days)
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}
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return tm.Add(duration)
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}
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// 辅助函数
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var cnDateRegex = regexp.MustCompile(`(\d{2,4})?年?(\d{1,2})月(\d{1,2})日`)
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var cnTimeRegex = regexp.MustCompile(`(上午|下午)?(\d{1,2})(?:时|点|：)(\d{1,2})(?:分|：)(\d{1,2})?秒?`)
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func parseCN(str string) time.Time {
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str = strings.ReplaceAll(str, "：", ":")
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str = strings.ReplaceAll(str, " ", "")
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var y, m, d, h, mm, s int
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if matches := cnDateRegex.FindStringSubmatch(str); len(matches) == 4 {
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y = cast.Int(matches[1])
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m = cast.Int(matches[2])
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d = cast.Int(matches[3])
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if y > 0 && y < 100 { y += 2000 }
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}
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if matches := cnTimeRegex.FindStringSubmatch(str); len(matches) == 5 {
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h = cast.Int(matches[2])
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mm = cast.Int(matches[3])
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s = cast.Int(matches[4])
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if matches[1] == "下午" && h < 12 { h += 12 }
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if matches[1] == "上午" && h >= 12 { h -= 12 }
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}
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if y == 0 { y = time.Now().Year() }
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if m == 0 { m = int(time.Now().Month()) }
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if d == 0 { d = time.Now().Day() }
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return time.Date(y, time.Month(m), d, h, mm, s, 0, time.Local)
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}
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// Helpers
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func Now() time.Time { return time.Now() }
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func Today() time.Time { return time.Date(time.Now().Year(), time.Now().Month(), time.Now().Day(), 0, 0, 0, 0, time.Local) }
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func Yesterday() time.Time { return Today().AddDate(0, 0, -1) }
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func Tomorrow() time.Time { return Today().AddDate(0, 0, 1) }
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