Use tickers instead of time.Sleep(), simplify main loop condition

cmd/i3status-go/main.go

@@ -160,8 +160,7 @@ func main() {
 
 	fmt.Println("[ [],")
 
-	for {
-		if <-Conf.Channels.UpdateReady {
+	for range Conf.Channels.UpdateReady {
 		// Actually build json struct, marshal it and print result
 		var j []lib.I3BarOutBlock
 
@@ -569,7 +568,6 @@ func main() {
 		}
 	}
 }
-}
 
 // PrintToI3bar prints info to stdout according to ipc docs (https://i3wm.org/docs/i3bar-protocol.html)
 func PrintToI3bar(c *lib.MyConfig) {

internal/lib/batteries.go

@@ -16,11 +16,10 @@ func (c *MyConfig) UpdateBatteryInfo() {
 		Batts              string
 		InitialDelay       = 100 * time.Millisecond
 		LoopIterationDelay = 5 * time.Second
+		Delay              = InitialDelay
+		ticker             = time.NewTicker(Delay)
 	)
 
-	Delay := InitialDelay
-	ticker := time.NewTicker(Delay)
-
 	for range ticker.C {
 		if Delay == InitialDelay {
 			Delay = LoopIterationDelay
@@ -170,7 +169,5 @@ func (c *MyConfig) UpdateBatteryInfo() {
 			c.Values.BatteryString = Batts
 			c.Channels.UpdateReady <- true
 		}
-
-		time.Sleep(5 * time.Second)
 	}
 }

internal/lib/clock.go

@@ -7,7 +7,19 @@ import (
 
 // UpdateClock get and updates (on i3bar) info about system clock.
 func (c *MyConfig) UpdateClock() {
-	for {
+	var (
+		InitialDelay       = 100 * time.Millisecond
+		LoopIterationDelay = 1 * time.Second
+		Delay              = InitialDelay
+		ticker             = time.NewTicker(Delay)
+	)
+
+	for range ticker.C {
+		if Delay == InitialDelay {
+			Delay = LoopIterationDelay
+			ticker.Reset(Delay)
+		}
+
 		currentTime := time.Now()
 		hours, minutes, _ := currentTime.Clock()
 		year, month, day := currentTime.Date()
@@ -21,7 +33,5 @@ func (c *MyConfig) UpdateClock() {
 			c.Values.ClockTime = myclock
 			c.Channels.UpdateReady <- true
 		}
-
-		time.Sleep(1 * time.Second)
 	}
 }

internal/lib/cputemp.go

@@ -10,15 +10,26 @@ import (
 
 // UpdateCPUTemperature gets and updates average CPU cores temperature.
 func (c *MyConfig) UpdateCPUTemperature() {
-	n := len(c.CPUTemp.File)
+	var (
+		n                  = len(c.CPUTemp.File)
+		InitialDelay       = 100 * time.Millisecond
+		LoopIterationDelay = 3 * time.Second
+		Delay              = InitialDelay
+		ticker             = time.NewTicker(Delay)
+	)
 
-	for {
+	for range ticker.C {
 		var (
 			temperature = make([]int64, n)
 			tSum        int64
 			tAvg        int64
 		)
 
+		if Delay == InitialDelay {
+			Delay = LoopIterationDelay
+			ticker.Reset(Delay)
+		}
+
 		for i, filename := range c.CPUTemp.File {
 			file, err := os.Open(filename)
 
@@ -71,7 +82,5 @@ func (c *MyConfig) UpdateCPUTemperature() {
 			c.Values.CPUTemperature = tAvg
 			c.Channels.UpdateReady <- true
 		}
-
-		time.Sleep(3 * time.Second)
 	}
 }

internal/lib/ifmon.go

@@ -11,7 +11,19 @@ import (
 
 // UpdateIfStatus updates network interfaces status for i3bar.
 func (c *MyConfig) UpdateIfStatus() {
-	for {
+	var (
+		InitialDelay       = 100 * time.Millisecond
+		LoopIterationDelay = 3 * time.Second
+		Delay              = InitialDelay
+		ticker             = time.NewTicker(Delay)
+	)
+
+	for range ticker.C {
+		if Delay == InitialDelay {
+			Delay = LoopIterationDelay
+			ticker.Reset(Delay)
+		}
+
 		var statusSum string
 
 		for _, item := range c.NetIf.If {
@@ -53,7 +65,5 @@ func (c *MyConfig) UpdateIfStatus() {
 			c.Values.IfStatus = statusSum
 			c.Channels.UpdateReady <- true
 		}
-
-		time.Sleep(3 * time.Second)
 	}
 }

internal/lib/la.go

@@ -9,7 +9,19 @@ import (
 
 // UpdateLaStats вытаскивает показание LA за последнюю минуту.
 func (c *MyConfig) UpdateLaStats() {
-	for {
+	var (
+		InitialDelay       = 100 * time.Millisecond
+		LoopIterationDelay = 3 * time.Second
+		Delay              = InitialDelay
+		ticker             = time.NewTicker(Delay)
+	)
+
+	for range ticker.C {
+		if Delay == InitialDelay {
+			Delay = LoopIterationDelay
+			ticker.Reset(Delay)
+		}
+
 		l, _ := load.Avg()
 
 		lav := fmt.Sprintf("%.2f", l.Load1)
@@ -18,7 +30,5 @@ func (c *MyConfig) UpdateLaStats() {
 			c.Values.La = lav
 			c.Channels.UpdateReady <- true
 		}
-
-		time.Sleep(3 * time.Second)
 	}
 }

internal/lib/memory.go

@@ -16,7 +16,19 @@ type Mem struct {
 
 // UpdateMemStats parses mem info stats.
 func (c *MyConfig) UpdateMemStats() {
-	for {
+	var (
+		InitialDelay       = 100 * time.Millisecond
+		LoopIterationDelay = 3 * time.Second
+		Delay              = InitialDelay
+		ticker             = time.NewTicker(Delay)
+	)
+
+	for range ticker.C {
+		if Delay == InitialDelay {
+			Delay = LoopIterationDelay
+			ticker.Reset(Delay)
+		}
+
 		v, err := mem.VirtualMemory()
 
 		if err != nil {
@@ -49,7 +61,5 @@ func (c *MyConfig) UpdateMemStats() {
 				c.Channels.UpdateReady <- true
 			}
 		}
-
-		time.Sleep(3 * time.Second)
 	}
 }

internal/lib/vpn.go

@@ -13,9 +13,18 @@ func (c *MyConfig) UpdateVPNStatus() {
 		vpnCStatus         string
 		tcpCheck           string
 		vpnCheck           string
+		InitialDelay       = 100 * time.Millisecond
+		LoopIterationDelay = 3 * time.Second
+		Delay              = InitialDelay
+		ticker             = time.NewTicker(Delay)
 	)
 
-	for {
+	for range ticker.C {
+		if Delay == InitialDelay {
+			Delay = LoopIterationDelay
+			ticker.Reset(Delay)
+		}
+
 		if c.VPNFileCheck() {
 			if c.Vpn.UpColor == "" {
 				vpnCheck = `⍋`
@@ -54,8 +63,6 @@ func (c *MyConfig) UpdateVPNStatus() {
 			c.Values.VPNStatus = vpnCStatus
 			c.Channels.UpdateReady <- true
 		}
-
-		time.Sleep(3 * time.Second)
 	}
 }