randomise timer, add some comments

main.go

@@ -15,6 +15,7 @@ package main
  * regexp to help parse messages.
  * sync to make things concurrency safe
  * time to sleep for some time before reducing the counter
+ * rand to randomise the timer ticks
 */
 import (
 	"bufio"
@@ -24,6 +25,7 @@ import (
 	"strings"
 	"sync"
 	"time"
+	"math/rand"
 )
 
 /*
@@ -141,7 +143,8 @@ func getCounter() int {
 func countdown(conn *net.Conn, reset chan int) {
 	locked := false
 	for {
-		timer := time.NewTimer(time.Duration(maxTime) * time.Second) // TODO randomise a bit, longer times
+		duration := rand.Intn(maxTime-minTime) + minTime
+		timer := time.NewTimer(time.Duration(duration) * time.Second) // TODO randomise a bit, longer times
 		select {
 		case <-timer.C: // on a timer timeout
 			if !locked {
@@ -251,7 +254,7 @@ func main() {
 						sendMessage(&conn, channel, "The timer is locked! You can't press the button.")
 					}
 				} else if msgContent == ",reset" {
-					// TODO maybe check 
+					// TODO maybe check some kind of auth on doing this
 					reset <- 0
 					sendMessage(&conn, channel, "Timer reset!")
 				} else if msgContent == ",count" {