Add battery support

2 files changed, 47 insertions, 1 deletions

diff --git a/statusbar.conf b/statusbar.conf
index 6f65e03..5bbf600 100644
--- a/statusbar.conf
+++ b/statusbar.conf
@@ -1,5 +1,5 @@
 # from left to right
-sections = [ "music", "ip", "mounts", "clock" ]
+sections = [ "music", "battery", "ip", "mounts", "clock" ]
 delay = 10
 separator = "  |  "
 
@@ -25,3 +25,7 @@ port = 6600
 [clock]
 label = ""
 format = "Monday 2006-01-02 15:04:05"
+
+[battery]
+label = "battery: "
+sublabel = "battery"
diff --git a/statusbar.go b/statusbar.go
index 1a4ecb6..93e6c22 100644
--- a/statusbar.go
+++ b/statusbar.go
@@ -34,6 +34,7 @@ type Config struct {
 	Mounts MountConfig
 	Music MusicConfig
 	Clock ClockConfig
+	Battery BatteryConfig
 }
 
 type IPConfig struct {
@@ -61,6 +62,11 @@ type ClockConfig struct {
 	Format string
 }
 
+type BatteryConfig struct {
+	Label string
+	SubLabel string `toml:"sublabel"`
+}
+
 func diskSizes(config MountConfig) string {
 	var b strings.Builder
 	var statfs syscall.Statfs_t
@@ -260,6 +266,40 @@ func buildMusic(config MusicConfig) string {
 	return b.String()
 }
 
+func battery(config BatteryConfig) string {
+	var b strings.Builder
+	const batteryPath = "/sys/class/power_supply"
+	files, err := ioutil.ReadDir(batteryPath)
+	if err != nil {
+		panic(err)
+	}
+	batteryNb := 0
+	separator := ""
+	for _, file := range files {
+		b.WriteString(separator)
+		filePath := fmt.Sprintf("%v/%v/%v", batteryPath, file.Name(), "capacity")
+		var capacity string
+		content, err := ioutil.ReadFile(filePath)
+		if err != nil {
+			content = []byte("0")
+		}
+		capacity = strings.TrimSuffix(string(content), "\n")
+		b.WriteString(fmt.Sprintf("%v%v: %v%%", config.SubLabel, batteryNb, capacity))
+		batteryNb += 1
+		separator = " "
+	}
+	return b.String()
+}
+
+func buildBattery(config BatteryConfig) string {
+	var b strings.Builder
+	b.WriteString(config.Label)
+	b.WriteString("[ ")
+	b.WriteString(battery(config))
+	b.WriteString(" ]")
+	return b.String()
+}
+
 func main() {
 	var configPath = "/etc/statusbar.conf"
 	var content []byte
@@ -289,6 +329,8 @@ func main() {
 				b.WriteString(buildMounts(config.Mounts))
 			case "music":
 				b.WriteString(buildMusic(config.Music))
+			case "battery":
+				b.WriteString(buildBattery(config.Battery))
 			default:
 			}
 			if i < len(config.Sections) - 1 {