Add the method to modify group add member mode

group.go

@@ -338,6 +338,23 @@ func (cli *Client) SetGroupAnnounce(jid types.JID, announce bool) error {
 	return err
 }
 
+// SetGroupAddMemberMode changes who can add member to this group
+func (cli *Client) SetGroupAddMemberMode(jid types.JID, isMemberCouldAdd bool) error {
+	tag := "member_add_mode"
+	var addMemberMode types.GroupMemberAddMode
+	if isMemberCouldAdd {
+		addMemberMode = types.GroupMemberAddModeAllMember
+	} else {
+		addMemberMode = types.GroupMemberAddModeAdmin
+	}
+
+	_, err := cli.sendGroupIQ(context.TODO(), iqSet, jid, waBinary.Node{
+		Tag:     tag,
+		Content: []byte(addMemberMode),
+	})
+	return err
+}
+
 // GetGroupInviteLink requests the invite link to the group from the WhatsApp servers.
 //
 // If reset is true, then the old invite link will be revoked and a new one generated.

mdtest/main.go

@@ -561,6 +561,41 @@ func handleCmd(cmd string, args []string) {
 				log.Infof("%+v", group)
 			}
 		}
+	case "setgrouppermissions":
+		if len(args) < 3 {
+			log.Errorf("Usage: setgrouppermissions <jid> <action> <status>")
+			return
+		}
+		jid, ok := parseJID(args[0])
+		if !ok {
+			return
+		}
+		action := args[1]
+
+		status, err := strconv.ParseBool(args[2])
+		if err != nil {
+			log.Errorf("Valid status: ture, false")
+			return
+		}
+
+		switch action {
+		case "edit":
+			err = cli.SetGroupLocked(jid, status)
+		case "send":
+			err = cli.SetGroupAnnounce(jid, status)
+		case "add":
+			err = cli.SetGroupAddMemberMode(jid, status)
+		default:
+			log.Errorf("Valid actions: edit, send, add")
+			return
+		}
+
+		if err != nil {
+			log.Errorf("Failed to Setgrouppermissions, action: %v, status:%v, err:%v", action, args[2], err)
+		} else {
+			log.Infof("Setgrouppermissions action: %s to status:%s", action, args[2])
+		}
+
 	case "getinvitelink":
 		if len(args) < 1 {
 			log.Errorf("Usage: getinvitelink <jid> [--reset]")

types/group.go

@@ -13,7 +13,8 @@ import (
 type GroupMemberAddMode string
 
 const (
-	GroupMemberAddModeAdmin GroupMemberAddMode = "admin_add"
+	GroupMemberAddModeAdmin     GroupMemberAddMode = "admin_add"
+	GroupMemberAddModeAllMember GroupMemberAddMode = "all_member_add"
 )
 
 // GroupInfo contains basic information about a group chat on WhatsApp.