Add GUI frontend

cmd/itgui/info.go

@@ -0,0 +1,141 @@
+package main
+
+import (
+	"bufio"
+	"errors"
+	"fmt"
+	"image/color"
+	"net"
+
+	"encoding/json"
+
+	"fyne.io/fyne/v2"
+	"fyne.io/fyne/v2/canvas"
+	"fyne.io/fyne/v2/container"
+	"fyne.io/fyne/v2/theme"
+	"go.arsenm.dev/itd/internal/types"
+)
+
+func infoTab(parent fyne.Window) *fyne.Container {
+	infoLayout := container.NewVBox(
+		// Add rectangle for a bit of padding
+		canvas.NewRectangle(color.Transparent),
+	)
+
+	heartRateLbl := newText("0 BPM", 24)
+	heartRate := container.NewVBox(
+		newText("Heart Rate", 12),
+		heartRateLbl,
+		canvas.NewLine(theme.ShadowColor()),
+	)
+	infoLayout.Add(heartRate)
+
+	go watch(types.ReqTypeWatchHeartRate, func(data interface{}) {
+		heartRateLbl.Text = fmt.Sprintf("%d BPM", int(data.(float64)))
+		heartRateLbl.Refresh()
+	}, parent)
+
+	battLevelLbl := newText("0%", 24)
+	battLevel := container.NewVBox(
+		newText("Battery Level", 12),
+		battLevelLbl,
+		canvas.NewLine(theme.ShadowColor()),
+	)
+	infoLayout.Add(battLevel)
+
+	go watch(types.ReqTypeWatchBattLevel, func(data interface{}) {
+		battLevelLbl.Text = fmt.Sprintf("%d%%", int(data.(float64)))
+		battLevelLbl.Refresh()
+	}, parent)
+
+	fwVerString, err := get(types.ReqTypeFwVersion)
+	if err != nil {
+		panic(err)
+	}
+
+	fwVer := container.NewVBox(
+		newText("Firmware Version", 12),
+		newText(fwVerString.(string), 24),
+		canvas.NewLine(theme.ShadowColor()),
+	)
+	infoLayout.Add(fwVer)
+
+	btAddrString, err := get(types.ReqTypeBtAddress)
+	if err != nil {
+		panic(err)
+	}
+
+	btAddr := container.NewVBox(
+		newText("Bluetooth Address", 12),
+		newText(btAddrString.(string), 24),
+		canvas.NewLine(theme.ShadowColor()),
+	)
+	infoLayout.Add(btAddr)
+
+	return infoLayout
+}
+
+func watch(req int, onRecv func(data interface{}), parent fyne.Window) error {
+	conn, err := net.Dial("unix", SockPath)
+	if err != nil {
+		return err
+	}
+	defer conn.Close()
+	err = json.NewEncoder(conn).Encode(types.Request{
+		Type: req,
+	})
+	if err != nil {
+		return err
+	}
+	scanner := bufio.NewScanner(conn)
+	for scanner.Scan() {
+		res, err := getResp(scanner.Bytes())
+		if err != nil {
+			guiErr(err, "Error getting response from connection", parent)
+			continue
+		}
+		onRecv(res.Value)
+	}
+	return nil
+}
+
+func get(req int) (interface{}, error) {
+	conn, err := net.Dial("unix", SockPath)
+	if err != nil {
+		return nil, err
+	}
+	defer conn.Close()
+	err = json.NewEncoder(conn).Encode(types.Request{
+		Type: req,
+	})
+	if err != nil {
+		return nil, err
+	}
+	line, _, err := bufio.NewReader(conn).ReadLine()
+	if err != nil {
+		return nil, err
+	}
+	res, err := getResp(line)
+	if err != nil {
+		return nil, err
+	}
+	return res.Value, nil
+}
+
+func getResp(line []byte) (*types.Response, error) {
+	var res types.Response
+	err := json.Unmarshal(line, &res)
+	if err != nil {
+		return nil, err
+	}
+	if res.Error {
+		return nil, errors.New(res.Message)
+	}
+	return &res, nil
+}
+
+func newText(t string, size float32) *canvas.Text {
+	text := canvas.NewText(t, theme.ForegroundColor())
+	text.TextSize = size
+	return text
+}