From 68b3ffa79979f4f077599df3a4e1c0b8dfa5e50e Mon Sep 17 00:00:00 2001
From: Luther Wen Xu <lutherchanpublic+git@gmail.com>
Date: Sat, 30 May 2020 20:45:01 +0800
Subject: [PATCH] feat: Add ability to format time and plural

---
 util/format.go | 46 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 46 insertions(+)
 create mode 100644 util/format.go

diff --git a/util/format.go b/util/format.go
new file mode 100644
index 0000000..af0dd2b
--- /dev/null
+++ b/util/format.go
@@ -0,0 +1,46 @@
+package util
+
+import (
+	"strconv"
+)
+
+func FormatTime(seconds int64) string {
+	listedTime := make([]string, 0, 5)
+	if seconds > 365*24*60*60 {
+		listedTime = append(listedTime, FormatPlural(seconds/365/24/60/60, "year", "years"))
+		seconds %= 365 * 24 * 60 * 60
+	}
+	if seconds > 24*60*60 {
+		listedTime = append(listedTime, FormatPlural(seconds/24/60/60, "day", "days"))
+		seconds %= 24 * 60 * 60
+	}
+	if seconds > 60*60 {
+		listedTime = append(listedTime, FormatPlural(seconds/60/60, "hour", "hours"))
+		seconds %= 60 * 60
+	}
+	if seconds > 60 {
+		listedTime = append(listedTime, FormatPlural(seconds/60, "minute", "minutes"))
+		seconds %= 60
+	}
+	listedTime = append(listedTime, FormatPlural(seconds, "second", "seconds"))
+	switch len(listedTime) {
+	case 1:
+		return listedTime[0]
+	case 2:
+		return listedTime[0] + " and " + listedTime[1]
+	}
+	time := ""
+	for i := 0; i < len(listedTime)-2; i++ {
+		time += listedTime[i] + ", "
+	}
+	time += listedTime[len(listedTime)-2] + ", and "
+	time += listedTime[len(listedTime)-1]
+	return time
+}
+
+func FormatPlural(count int64, singular string, plural string) string {
+	if count == 0 || count == 1 {
+		return strconv.FormatInt(count, 10) + " " + singular
+	}
+	return strconv.FormatInt(count, 10) + " " + plural
+}