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/
time.go
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/
time.go
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package devstats
import (
"fmt"
"os"
"strconv"
"strings"
"time"
)
// HourStart - return time rounded to current hour start
func HourStart(dt time.Time) time.Time {
return time.Date(
dt.Year(),
dt.Month(),
dt.Day(),
dt.Hour(),
0,
0,
0,
time.UTC,
)
}
// NextHourStart - return time rounded to next hour start
func NextHourStart(dt time.Time) time.Time {
return HourStart(dt).Add(time.Hour)
}
// PrevHourStart - return time rounded to prev hour start
func PrevHourStart(dt time.Time) time.Time {
return HourStart(dt).Add(-time.Hour)
}
// DayStart - return time rounded to current day start
func DayStart(dt time.Time) time.Time {
return time.Date(
dt.Year(),
dt.Month(),
dt.Day(),
0,
0,
0,
0,
time.UTC,
)
}
// NextDayStart - return time rounded to next day start
func NextDayStart(dt time.Time) time.Time {
return DayStart(dt).AddDate(0, 0, 1)
}
// PrevDayStart - return time rounded to prev day start
func PrevDayStart(dt time.Time) time.Time {
return DayStart(dt).AddDate(0, 0, -1)
}
// WeekStart - return time rounded to current week start
// Assumes first week day is Sunday
func WeekStart(dt time.Time) time.Time {
wDay := int(dt.Weekday())
// Go returns negative numbers for `modulo` operation when argument is negative
// So instead of wDay-1 I'm using wDay+6
subDays := (wDay + 6) % 7
return DayStart(dt).AddDate(0, 0, -subDays)
}
// NextWeekStart - return time rounded to next week start
func NextWeekStart(dt time.Time) time.Time {
return WeekStart(dt).AddDate(0, 0, 7)
}
// PrevWeekStart - return time rounded to prev week start
func PrevWeekStart(dt time.Time) time.Time {
return WeekStart(dt).AddDate(0, 0, -7)
}
// MonthStart - return time rounded to current month start
func MonthStart(dt time.Time) time.Time {
return time.Date(
dt.Year(),
dt.Month(),
1,
0,
0,
0,
0,
time.UTC,
)
}
// NextMonthStart - return time rounded to next month start
func NextMonthStart(dt time.Time) time.Time {
return MonthStart(dt).AddDate(0, 1, 0)
}
// PrevMonthStart - return time rounded to prev month start
func PrevMonthStart(dt time.Time) time.Time {
return MonthStart(dt).AddDate(0, -1, 0)
}
// QuarterStart - return time rounded to current month start
func QuarterStart(dt time.Time) time.Time {
month := ((dt.Month()-1)/3)*3 + 1
return time.Date(
dt.Year(),
month,
1,
0,
0,
0,
0,
time.UTC,
)
}
// NextQuarterStart - return time rounded to next quarter start
func NextQuarterStart(dt time.Time) time.Time {
return QuarterStart(dt).AddDate(0, 3, 0)
}
// PrevQuarterStart - return time rounded to prev quarter start
func PrevQuarterStart(dt time.Time) time.Time {
return QuarterStart(dt).AddDate(0, -3, 0)
}
// YearStart - return time rounded to current month start
func YearStart(dt time.Time) time.Time {
return time.Date(
dt.Year(),
1,
1,
0,
0,
0,
0,
time.UTC,
)
}
// NextYearStart - return time rounded to next year start
func NextYearStart(dt time.Time) time.Time {
return YearStart(dt).AddDate(1, 0, 0)
}
// PrevYearStart - return time rounded to prev year start
func PrevYearStart(dt time.Time) time.Time {
return YearStart(dt).AddDate(-1, 0, 0)
}
// TimeParseAny - attempts to parse time from string YYYY-MM-DD HH:MI:SS
// Skipping parts from right until only YYYY id left
func TimeParseAny(dtStr string) time.Time {
formats := []string{
"2006-01-02 15:04:05",
"2006-01-02 15:04",
"2006-01-02 15",
"2006-01-02",
"2006-01",
"2006",
}
for _, format := range formats {
t, e := time.Parse(format, dtStr)
if e == nil {
return t
}
}
Printf("Error:\nCannot parse date: '%v'\n", dtStr)
fmt.Fprintf(os.Stdout, "Error:\nCannot parse date: '%v'\n", dtStr)
os.Exit(1)
return time.Now()
}
// TimeParseIDB - parse InfluxDB time output string into time.Time
func TimeParseIDB(dtStr string) time.Time {
t, err := time.Parse(time.RFC3339, dtStr)
FatalOnError(err)
return t
}
// ToGHADate - return time formatted as YYYY-MM-DD-H
func ToGHADate(dt time.Time) string {
return fmt.Sprintf("%04d-%02d-%02d-%d", dt.Year(), dt.Month(), dt.Day(), dt.Hour())
}
// ToYMDDate - return time formatted as YYYY-MM-DD
func ToYMDDate(dt time.Time) string {
return fmt.Sprintf("%04d-%02d-%02d", dt.Year(), dt.Month(), dt.Day())
}
// ToYMDHMSDate - return time formatted as YYYY-MM-DD HH:MI:SS
func ToYMDHMSDate(dt time.Time) string {
return fmt.Sprintf("%04d-%02d-%02d %02d:%02d:%02d", dt.Year(), dt.Month(), dt.Day(), dt.Hour(), dt.Minute(), dt.Second())
}
// ToYMDHDate - return time formatted as YYYY-MM-DD HH
func ToYMDHDate(dt time.Time) string {
return fmt.Sprintf("%04d-%02d-%02d %d", dt.Year(), dt.Month(), dt.Day(), dt.Hour())
}
// DescriblePeriodInHours - return string description of a time period given in hours
func DescriblePeriodInHours(hrs float64) (desc string) {
secs := int((hrs * 3600.0) + 0.5)
if secs < 0 {
return "- " + DescriblePeriodInHours(-hrs)
}
if secs == 0 {
return "zero"
}
weeks := secs / 604800
if weeks > 0 {
if weeks > 1 {
desc += strconv.Itoa(weeks) + " weeks "
} else {
desc += "1 week "
}
secs -= weeks * 604800
}
days := secs / 86400
if days > 0 {
if days > 1 {
desc += strconv.Itoa(days) + " days "
} else {
desc += "1 day "
}
secs -= days * 86400
}
hours := secs / 3600
if hours > 0 {
if hours > 1 {
desc += strconv.Itoa(hours) + " hours "
} else {
desc += "1 hour "
}
secs -= hours * 3600
}
minutes := secs / 60
if minutes > 0 {
if minutes > 1 {
desc += strconv.Itoa(minutes) + " minutes "
} else {
desc += "1 minute "
}
secs -= minutes * 60
}
if secs > 0 {
if secs > 1 {
desc += strconv.Itoa(secs) + " seconds "
} else {
desc += "1 second "
}
}
return strings.TrimSpace(desc)
}
// AddNIntervals adds (using nextIntervalStart) or subtracts (using prevIntervalStart) N itervals to the given date
// Functions Next/Prev can use Hour, Day, Week, Month, Quarter, Year functions (defined in this module) or other custom defined functions
// With `func(time.Time) time.Time` signature
func AddNIntervals(dt time.Time, n int, nextIntervalStart, prevIntervalStart func(time.Time) time.Time) time.Time {
if n == 0 {
return dt
}
times := n
fun := nextIntervalStart
if n < 0 {
times = -n
fun = prevIntervalStart
}
for i := 0; i < times; i++ {
dt = fun(dt)
}
return dt
}
// GetIntervalFunctions - return interval name, interval number, interval start, next, prev function from interval abbr: h|d2|w3|m4|q|y
// w3 = 3 weeks, q2 = 2 quarters, y = year (1), d7 = 7 days (not the same as w), m3 = 3 months (not the same as q)
func GetIntervalFunctions(intervalAbbr string, allowUnknown bool) (interval string, n int, intervalStart, nextIntervalStart, prevIntervalStart func(time.Time) time.Time) {
n = 1
switch strings.ToLower(intervalAbbr[0:1]) {
case "h":
interval = "hour"
intervalStart = HourStart
nextIntervalStart = NextHourStart
prevIntervalStart = PrevHourStart
case "d":
interval = "day"
intervalStart = DayStart
nextIntervalStart = NextDayStart
prevIntervalStart = PrevDayStart
case "w":
interval = "week"
intervalStart = WeekStart
nextIntervalStart = NextWeekStart
prevIntervalStart = PrevWeekStart
case "m":
interval = "month"
intervalStart = MonthStart
nextIntervalStart = NextMonthStart
prevIntervalStart = PrevMonthStart
case "q":
interval = Quarter
intervalStart = QuarterStart
nextIntervalStart = NextQuarterStart
prevIntervalStart = PrevQuarterStart
case "y":
interval = "year"
intervalStart = YearStart
nextIntervalStart = NextYearStart
prevIntervalStart = PrevYearStart
default:
if !allowUnknown {
Printf("Error:\nUnknown interval '%v'\n", intervalAbbr)
fmt.Fprintf(os.Stdout, "Error:\nUnknown interval '%v'\n", intervalAbbr)
os.Exit(1)
} else {
return
}
}
lenIntervalAbbr := len(intervalAbbr)
if lenIntervalAbbr > 1 {
nStr := intervalAbbr[1:lenIntervalAbbr]
nI, err := strconv.Atoi(nStr)
FatalOnError(err)
if nI > 1 {
n = nI
}
}
return
}