finished: check update

app.go

@@ -1,7 +1,12 @@
 package main
 
 import (
+	"MacFastLookup/service"
 	"context"
+	"os"
+	"path/filepath"
+
+	"github.com/wailsapp/wails/v2/pkg/runtime"
 )
 
 // App struct
@@ -19,3 +24,20 @@ func NewApp() *App {
 func (a *App) startup(ctx context.Context) {
 	a.ctx = ctx
 }
+
+func (a *App) StartDownload() {
+	dbFileDir := ".macfastlookup"
+	userHomeDir, _ := os.UserHomeDir()
+	dbFileName := "mac_vendors.sqlite3"
+	dbFilePath := filepath.Join(userHomeDir, dbFileDir, dbFileName)
+
+	// create the folder if not exist
+	path := filepath.Join(userHomeDir, dbFileDir)
+	if _, err := os.Stat(path); os.IsNotExist(err) {
+		os.Mkdir(path, 0755)
+	}
+
+	service.DownloadFile("https://tools.taurusxin.com/macfastlookup/mac_vendors.sqlite3", dbFilePath, true, func(progress, total int64) {
+		runtime.EventsEmit(a.ctx, "download-progress", float32(progress / total))
+	})
+}