add webview program

cmd/bbgo-webview/main.go

@@ -0,0 +1,160 @@
+package main
+
+import (
+	"context"
+	"flag"
+	"net"
+	"os"
+	"os/signal"
+	"path/filepath"
+	"strconv"
+	"time"
+
+	"github.com/joho/godotenv"
+	"github.com/webview/webview"
+
+	log "github.com/sirupsen/logrus"
+
+	"github.com/c9s/bbgo/pkg/bbgo"
+	"github.com/c9s/bbgo/pkg/cmd"
+	"github.com/c9s/bbgo/pkg/server"
+)
+
+func main() {
+	noChangeDir := false
+	flag.BoolVar(&noChangeDir, "no-chdir", false, "do not change directory")
+	flag.Parse()
+
+	if !noChangeDir {
+		ep, err := os.Executable()
+		if err != nil {
+			log.Fatalln("failed to find the current executable:", err)
+		}
+
+		resourceDir := filepath.Join(filepath.Dir(ep), "..", "Resources")
+		if _, err := os.Stat(resourceDir); err == nil {
+			err = os.Chdir(resourceDir)
+			if err != nil {
+				log.Fatalln("chdir error:", err)
+			}
+		}
+	}
+
+	dotenvFile := ".env.local"
+	if _, err := os.Stat(dotenvFile); err == nil {
+		if err := godotenv.Load(dotenvFile); err != nil {
+			log.WithError(err).Error("error loading dotenv file")
+			return
+		}
+	}
+
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	debug, _ := strconv.ParseBool(os.Getenv("DEBUG_WEBVIEW"))
+	view := webview.New(debug)
+	defer view.Destroy()
+
+	view.SetTitle("BBGO")
+	view.SetSize(1024, 780, webview.HintNone)
+
+	configFile := "bbgo.yaml"
+	var setup *server.Setup
+	var userConfig *bbgo.Config
+
+	_, err := os.Stat(configFile)
+	if os.IsNotExist(err) {
+		setup = &server.Setup{
+			Context: ctx,
+			Cancel:  cancel,
+			Token:   "",
+			BeforeRestart: func() {
+				view.Destroy()
+			},
+		}
+		userConfig = &bbgo.Config{
+			Notifications:      nil,
+			Persistence:        nil,
+			Sessions:           nil,
+			ExchangeStrategies: nil,
+		}
+	} else {
+		userConfig, err = bbgo.Load(configFile, true)
+		if err != nil {
+			log.WithError(err).Error("can not load config file")
+			return
+		}
+	}
+
+	environ := bbgo.NewEnvironment()
+	trader := bbgo.NewTrader(environ)
+
+	// we could initialize the environment from the settings
+	if setup == nil {
+		if err := cmd.BootstrapEnvironment(ctx, environ, userConfig); err != nil {
+			log.WithError(err).Error("failed to bootstrap environment")
+			return
+		}
+
+		// we could initialize the environment from the settings
+		go func() {
+			if err := environ.Sync(ctx); err != nil {
+				log.WithError(err).Error("failed to sync data")
+				return
+			}
+
+			if err := trader.Configure(userConfig); err != nil {
+				log.WithError(err).Error("failed to configure trader")
+				return
+			}
+
+			// for setup mode, we don't start the trader
+			if err := trader.Run(ctx); err != nil {
+				log.WithError(err).Error("failed to start trader")
+			}
+		}()
+	}
+
+	// find a free port for binding the server
+	ln, err := net.Listen("tcp", "127.0.0.1:0")
+	if err != nil {
+		log.WithError(err).Error("can not bind listener")
+		return
+	}
+
+	defer ln.Close()
+
+	baseURL := "http://" + ln.Addr().String()
+
+	srv := &server.Server{
+		Config:        userConfig,
+		Environ:       environ,
+		Trader:        trader,
+		OpenInBrowser: false,
+		Setup:         setup,
+	}
+
+	go func() {
+		if err := srv.RunWithListener(ctx, ln); err != nil {
+			log.WithError(err).Errorf("server error")
+		}
+	}()
+
+	log.Infof("pinging the server at %s", baseURL)
+	server.PingUntil(ctx, time.Second, baseURL, func() {
+		log.Infof("got pong, navigate to %s", baseURL)
+		view.Navigate(baseURL)
+		view.Run()
+	})
+
+	// Wait until the interrupt signal arrives or browser window is closed
+	sigc := make(chan os.Signal)
+	signal.Notify(sigc, os.Interrupt)
+
+	select {
+	case <-sigc:
+	}
+
+	log.Println("exiting...")
+	view.Destroy()
+}