finish register

backend/register.go

@@ -0,0 +1,27 @@
+package backend
+
+import (
+	"errors"
+	"time"
+
+	"github.com/FloatTech/ttl"
+	"github.com/fumiama/paper-manager/backend/global"
+)
+
+var registerlimit = ttl.NewCache[string, bool](time.Minute * 10)
+
+var (
+	errRegisterTooFast = errors.New("register too fast")
+	errInvalidIP       = errors.New("invalid IP")
+)
+
+func register(ip, name, mobile, npwd string) error {
+	if registerlimit.Get(ip) {
+		return errRegisterTooFast
+	}
+	if ip == "" {
+		return errInvalidIP
+	}
+	registerlimit.Set(ip, true)
+	return global.UserDB.NotifyRegister(ip, name, mobile, npwd)
+}