publish lancet

datetime/datetime.go

@@ -0,0 +1,117 @@
+// Copyright 2021 dudaodong@gmail.com. All rights reserved.
+// Use of this source code is governed by MIT license.
+
+// Package datetime implements some functions to format date and time.
+
+// Note:
+// 1. `format` param in FormatTimeToStr function should be as flow:
+//"yyyy-mm-dd hh:mm:ss"
+//"yyyy-mm-dd hh:mm"
+//"yyyy-mm-dd hh"
+//"yyyy-mm-dd"
+//"yyyy-mm"
+//"mm-dd"
+//"dd-mm-yy hh:mm:ss"
+//"yyyy/mm/dd hh:mm:ss"
+//"yyyy/mm/dd hh:mm"
+//"yyyy/mm/dd hh"
+//"yyyy/mm/dd"
+//"yyyy/mm"
+//"mm/dd"
+//"dd/mm/yy hh:mm:ss"
+//"yyyy"
+//"mm"
+//"hh:mm:ss"
+//"mm:ss"
+
+package datetime
+
+import (
+	"strconv"
+	"time"
+)
+
+var timeFormat map[string]string
+
+func init() {
+	timeFormat = map[string]string{
+		"yyyy-mm-dd hh:mm:ss": "2006-01-02 15:04:05",
+		"yyyy-mm-dd hh:mm":    "2006-01-02 15:04",
+		"yyyy-mm-dd hh":       "2006-01-02 15:04",
+		"yyyy-mm-dd":          "2006-01-02",
+		"yyyy-mm":             "2006-01",
+		"mm-dd":               "01-02",
+		"dd-mm-yy hh:mm:ss":   "02-01-06 15:04:05",
+		"yyyy/mm/dd hh:mm:ss": "2006/01/02 15:04:05",
+		"yyyy/mm/dd hh:mm":    "2006/01/02 15:04",
+		"yyyy/mm/dd hh":       "2006/01/02 15",
+		"yyyy/mm/dd":          "2006/01/02",
+		"yyyy/mm":             "2006/01",
+		"mm/dd":               "01/02",
+		"dd/mm/yy hh:mm:ss":   "02/01/06 15:04:05",
+		"yyyy":                "2006",
+		"mm":                  "01",
+		"hh:mm:ss":            "15:04:05",
+		"mm:ss":               "04:05",
+	}
+}
+
+// AddMinute add or sub minute to the time
+func AddMinute(t time.Time, minute int64) time.Time {
+	s := strconv.FormatInt(minute, 10)
+	m, _ := time.ParseDuration(s + "m")
+	return t.Add(m)
+}
+
+// AddHour add or sub hour to the time
+func AddHour(t time.Time, hour int64) time.Time {
+	s := strconv.FormatInt(hour, 10)
+	h, _ := time.ParseDuration(s + "h")
+	return t.Add(h)
+}
+
+// AddDay add or sub day to the time
+func AddDay(t time.Time, day int64) time.Time {
+	dayHours := day * 24
+	d := strconv.FormatInt(dayHours, 10)
+	h, _ := time.ParseDuration(d + "h")
+	return t.Add(h)
+}
+
+// GetNowDate return format yyyy-mm-dd of current date
+func GetNowDate() string {
+	return time.Now().Format("2006-01-02")
+}
+
+// GetNowTime return format hh-mm-ss of current time
+func GetNowTime() string {
+	return time.Now().Format("15:04:05")
+}
+
+// GetNowDateTime return format yyyy-mm-dd hh-mm-ss of current datetime
+func GetNowDateTime() string {
+	return time.Now().Format("2006-01-02 15:04:05")
+}
+
+// GetZeroHourTimestamp return timestamp of zero hour (timestamp of 00:00)
+func GetZeroHourTimestamp() int64 {
+	ts := time.Now().Format("2006-01-02")
+	t, _ := time.Parse("2006-01-02", ts)
+	return t.UTC().Unix() - 8*3600
+}
+
+// GetNightTimestamp return timestamp of zero hour (timestamp of 23:59)
+func GetNightTimestamp() int64 {
+	return GetZeroHourTimestamp() + 86400 - 1
+}
+
+// FormatTimeToStr convert time to string
+func FormatTimeToStr(t time.Time, format string) string {
+	return t.Format(timeFormat[format])
+}
+
+// FormatStrToTime convert string to time
+func FormatStrToTime(str, format string) time.Time {
+	t, _ := time.Parse(timeFormat[format], str)
+	return t
+}