commit e0f17d6fdd558b5de5a2cd9a9355e66246e7ed76
Author: Felipe M <me@fmartingr.com>
Date:   Sun Jan 10 15:23:04 2021 +0100

    Base bar
    
    - Time
    - Battery %
    - Volume %

diff --git a/main.go b/main.go
new file mode 100644
index 0000000..19c43fe
--- /dev/null
+++ b/main.go
@@ -0,0 +1,108 @@
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"io/ioutil"
+	"os"
+	"os/exec"
+	"strconv"
+	"strings"
+	"time"
+)
+
+const HEADER = "{\"version\": 1}"
+const TEST_BLOCK = "[{\"full_text\": \"test\"}]"
+const SEPARATOR_WIDTH = 22
+
+type Bar struct {
+	Blocks []BarBlock `json:"blocks"`
+}
+
+type BarBlock struct {
+	FullText string `json:"full_text"`
+	//ShortText string `json:"short_text"`
+	//Color string `json:"color"`
+	//Background string `json:"background"`
+	//Border string `json:"border"`
+	//BorderTop int `json:"border_top"`
+	//BorderBottom int `json:"border_bottom"`
+	//BorderLeft int `json:"border_left"`
+	//BorderRight int `json:"border_right"`
+	//MinWidth string `json:"min_width"`
+	//Align string `json:"align"`
+	//Name string `json:"name"`
+	//Instance string `json:"instance"`
+	Urgent              bool `json:"urgent"`
+	Separator           bool `json:"separator"`
+	SeparatorBlockWidth int  `json:"separator_block_width"`
+	//Markup string `json:"markup"`
+}
+
+func NewBlock() BarBlock {
+	return BarBlock{SeparatorBlockWidth: SEPARATOR_WIDTH}
+}
+
+func getDateTimeBlock() BarBlock {
+	format := "02 15:04"
+	block := NewBlock()
+	block.FullText = time.Now().Local().Format(format)
+	return block
+}
+
+func getBatteryBlock(battery string) BarBlock {
+	// TODO Check that `/sys/class/power_supply/{battery} exists
+	block := NewBlock()
+	block.Separator = true
+	percentageContent, _ := ioutil.ReadFile("/sys/class/power_supply/" + battery + "/capacity")
+	percentageInt, _ := strconv.Atoi(strings.TrimSpace(string(percentageContent)))
+	block.FullText = strconv.Itoa(percentageInt) + "%"
+
+	statusContent, _ := ioutil.ReadFile("/sys/class/power_supply/" + battery + "/status")
+	batteryStatus := strings.TrimSpace(string(statusContent))
+
+	if batteryStatus == "Charging" {
+		block.FullText = block.FullText + "+"
+	} else if batteryStatus == "Discharging" {
+		block.FullText = block.FullText + "-"
+	}
+
+	if percentageInt <= 10 {
+		block.Urgent = true
+	}
+
+	return block
+}
+
+func getVolumeLevelBlock() BarBlock {
+	block := NewBlock()
+	block.Separator = true
+	cmd := exec.Command("bash", "-c", "amixer get Master | grep 'Left:' | awk -F\"[][]\" '{ print $2 }'")
+	cmd.Env = os.Environ()
+	out, err := cmd.Output()
+	if err != nil {
+		fmt.Println(err)
+	}
+
+	block.FullText = strings.TrimSpace(string(out))
+
+	return block
+}
+
+func main() {
+	fmt.Println(HEADER)
+	fmt.Print("[")
+	for {
+	bar := Bar{}
+		var volumeBlock = getVolumeLevelBlock()
+		bar.Blocks = append(bar.Blocks, volumeBlock)
+		var batteryBlock = getBatteryBlock("BAT0")
+		bar.Blocks = append(bar.Blocks, batteryBlock)
+		var timeBlock = getDateTimeBlock()
+		bar.Blocks = append(bar.Blocks, timeBlock)
+		blockJSON, _ := json.Marshal(bar.Blocks)
+		fmt.Print(string(blockJSON), ",")
+		time.Sleep((1250 * 10) * time.Millisecond)
+	}
+}
+