1 files changed, 145 insertions, 0 deletions
diff --git a/modules/timeutil/since.go b/modules/timeutil/since.go
new file mode 100644
index 0000000..dba42c7
--- /dev/null
+++ b/modules/timeutil/since.go
@@ -0,0 +1,145 @@
+// Copyright 2019 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package timeutil
+
+import (
+	"fmt"
+	"html/template"
+	"strings"
+	"time"
+
+	"code.gitea.io/gitea/modules/setting"
+	"code.gitea.io/gitea/modules/translation"
+)
+
+// Seconds-based time units
+const (
+	Minute = 60
+	Hour   = 60 * Minute
+	Day    = 24 * Hour
+	Week   = 7 * Day
+	Month  = 30 * Day
+	Year   = 12 * Month
+)
+
+func computeTimeDiffFloor(diff int64, lang translation.Locale) (int64, string) {
+	var diffStr string
+	switch {
+	case diff <= 0:
+		diff = 0
+		diffStr = lang.TrString("tool.now")
+	case diff < 2:
+		diff = 0
+		diffStr = lang.TrString("tool.1s")
+	case diff < 1*Minute:
+		diffStr = lang.TrString("tool.seconds", diff)
+		diff = 0
+
+	case diff < 2*Minute:
+		diff -= 1 * Minute
+		diffStr = lang.TrString("tool.1m")
+	case diff < 1*Hour:
+		diffStr = lang.TrString("tool.minutes", diff/Minute)
+		diff -= diff / Minute * Minute
+
+	case diff < 2*Hour:
+		diff -= 1 * Hour
+		diffStr = lang.TrString("tool.1h")
+	case diff < 1*Day:
+		diffStr = lang.TrString("tool.hours", diff/Hour)
+		diff -= diff / Hour * Hour
+
+	case diff < 2*Day:
+		diff -= 1 * Day
+		diffStr = lang.TrString("tool.1d")
+	case diff < 1*Week:
+		diffStr = lang.TrString("tool.days", diff/Day)
+		diff -= diff / Day * Day
+
+	case diff < 2*Week:
+		diff -= 1 * Week
+		diffStr = lang.TrString("tool.1w")
+	case diff < 1*Month:
+		diffStr = lang.TrString("tool.weeks", diff/Week)
+		diff -= diff / Week * Week
+
+	case diff < 2*Month:
+		diff -= 1 * Month
+		diffStr = lang.TrString("tool.1mon")
+	case diff < 1*Year:
+		diffStr = lang.TrString("tool.months", diff/Month)
+		diff -= diff / Month * Month
+
+	case diff < 2*Year:
+		diff -= 1 * Year
+		diffStr = lang.TrString("tool.1y")
+	default:
+		diffStr = lang.TrString("tool.years", diff/Year)
+		diff -= (diff / Year) * Year
+	}
+	return diff, diffStr
+}
+
+// MinutesToFriendly returns a user friendly string with number of minutes
+// converted to hours and minutes.
+func MinutesToFriendly(minutes int, lang translation.Locale) string {
+	duration := time.Duration(minutes) * time.Minute
+	return TimeSincePro(time.Now().Add(-duration), lang)
+}
+
+// TimeSincePro calculates the time interval and generate full user-friendly string.
+func TimeSincePro(then time.Time, lang translation.Locale) string {
+	return timeSincePro(then, time.Now(), lang)
+}
+
+func timeSincePro(then, now time.Time, lang translation.Locale) string {
+	diff := now.Unix() - then.Unix()
+
+	if then.After(now) {
+		return lang.TrString("tool.future")
+	}
+	if diff == 0 {
+		return lang.TrString("tool.now")
+	}
+
+	var timeStr, diffStr string
+	for {
+		if diff == 0 {
+			break
+		}
+
+		diff, diffStr = computeTimeDiffFloor(diff, lang)
+		timeStr += ", " + diffStr
+	}
+	return strings.TrimPrefix(timeStr, ", ")
+}
+
+func timeSinceUnix(then, now time.Time, _ translation.Locale) template.HTML {
+	friendlyText := then.Format("2006-01-02 15:04:05 -07:00")
+
+	// document: https://github.com/github/relative-time-element
+	attrs := `tense="past"`
+	isFuture := now.Before(then)
+	if isFuture {
+		attrs = `tense="future"`
+	}
+
+	// declare data-tooltip-content attribute to switch from "title" tooltip to "tippy" tooltip
+	htm := fmt.Sprintf(`<relative-time prefix="" %s datetime="%s" data-tooltip-content data-tooltip-interactive="true">%s</relative-time>`,
+		attrs, then.Format(time.RFC3339), friendlyText)
+	return template.HTML(htm)
+}
+
+// TimeSince renders relative time HTML given a time.Time
+func TimeSince(then time.Time, lang translation.Locale) template.HTML {
+	if setting.UI.PreferredTimestampTense == "absolute" {
+		return DateTime("full", then)
+	}
+	return timeSinceUnix(then, time.Now(), lang)
+}
+
+// TimeSinceUnix renders relative time HTML given a TimeStamp
+func TimeSinceUnix(then TimeStamp, lang translation.Locale) template.HTML {
+	return TimeSince(then.AsLocalTime(), lang)
+}