feat: check update

service/service.go

@@ -39,6 +39,17 @@ func (helper *SQLiteHelper) Close() {
 	helper.db.Close()
 }
 
+func (helper *SQLiteHelper) ReloadDatabase() bool {
+	helper.db.Close()
+	db, err := sql.Open("sqlite3", helper.connectionString)
+	if err != nil {
+		log.Fatal(err)
+		return false
+	}
+	helper.db = db
+	return true
+}
+
 func (helper *SQLiteHelper) QueryMacAddressByPrefix(prefix string) (*MacAddress, error) {
 	const tableName = "MacAddresses"
 	query := fmt.Sprintf("SELECT * FROM %s WHERE Prefix = ?", tableName)

service/update.go

@@ -0,0 +1,28 @@
+package service
+
+import (
+	"io"
+	"net/http"
+)
+
+type UpdateService struct {
+	Url string
+}
+
+func NewUpdateService(url string) *UpdateService {
+	return &UpdateService{Url: url}
+}
+
+func (updater *UpdateService) GetLatestVersion() *string {
+	res, err := http.Get(updater.Url)
+	if err != nil {
+		return nil
+	}
+	defer res.Body.Close()
+	body, err := io.ReadAll(res.Body)
+	if err != nil {
+		return nil
+	}
+	str := string(body)
+	return &str
+}