Add ago

README.md

@@ -1,6 +1,8 @@
 # go-tools
 Collection of tools I've written in golang
 
+- **ago**: Get the time difference between now and given unix timestamp, in human readable format
+
 - **did**: A simple, cli-based task logger. Mainly intended for multi-admin environments.
 
 - **kahin**: A tool to find which directory fills the given disk, with a somewhat unique algorithm.

ago/ago.go

@@ -0,0 +1,53 @@
+package main
+
+import (
+	"fmt"
+	"math"
+	"os"
+	"strconv"
+	"time"
+)
+
+func relativeTime(timestamp int64) string {
+	now := time.Now().Unix()
+	diff := math.Abs(float64(timestamp - now))
+	isFuture := timestamp > now
+
+	var result string
+	switch {
+	case diff < 60:
+		result = "Just now"
+	case diff < 3600:
+		result = fmt.Sprintf("%d minutes", int64(diff)/60)
+	case diff < 86400:
+		result = fmt.Sprintf("%d hours", int64(diff)/3600)
+	case diff < 2592000:
+		result = fmt.Sprintf("%d days", int64(diff)/86400)
+	case diff < 31536000:
+		result = fmt.Sprintf("%d months", int64(diff)/2592000)
+	default:
+		result = fmt.Sprintf("%d years", int64(diff)/31536000)
+	}
+
+	if isFuture && result != "Just now" {
+		return "In " + result
+	} else if !isFuture && result != "Just now" {
+		return result + " ago"
+	}
+	return result
+}
+
+func main() {
+	if len(os.Args) < 2 {
+		fmt.Println("Please provide a Unix timestamp as an argument")
+		os.Exit(1)
+	}
+
+	timestamp, err := strconv.ParseInt(os.Args[1], 10, 64)
+	if err != nil {
+		fmt.Println("Invalid timestamp:", err)
+		os.Exit(1)
+	}
+
+	fmt.Println(relativeTime(timestamp))
+}