feat(boards2): board creation and permissions (gnolang#3211)

Related to gnolang#3140

examples/gno.land/p/demo/boards2/admindao/admindao.gno

@@ -1,6 +1,7 @@
 package admindao
 
 import (
+	"errors"
 	"std"
 
 	"gno.land/p/demo/avl"
@@ -9,6 +10,9 @@ import (
 // TODO: Add support for proposals
 // TODO: Add support for events
 
+// ErrMemberExists indicates that a member is already part of the DAO.
+var ErrMemberExists = errors.New("member already exist")
+
 // AdminDAO defines a Boards administration DAO.
 type AdminDAO struct {
 	parent  *AdminDAO
@@ -40,6 +44,21 @@ func (dao AdminDAO) Members() []std.Address {
 	return members
 }
 
+// AddMember adds a new member to the DAO.
+func (dao *AdminDAO) AddMember(user std.Address) error {
+	if dao.IsMember(user) {
+		return ErrMemberExists
+	}
+	dao.members.Set(user.String(), struct{}{})
+	return nil
+}
+
+// RemoveMember removes a member from the DAO.
+func (dao *AdminDAO) RemoveMember(user std.Address) (removed bool) {
+	_, removed = dao.members.Remove(user.String())
+	return removed
+}
+
 // IsMember checks if a user is a member of the DAO.
 func (dao AdminDAO) IsMember(user std.Address) bool {
 	return dao.members.Has(user.String())

examples/gno.land/p/demo/boards2/admindao/admindao_test.gno

@@ -59,6 +59,30 @@ func TestNew(t *testing.T) {
 	}
 }
 
+func TestAdminDAOAddMember(t *testing.T) {
+	member := std.Address("g1jg8mtutu9khhfwc4nxmuhcpftf0pajdhfvsqf5")
+	dao := New(WithMember("g1w4ek2u33ta047h6lta047h6lta047h6ldvdwpn"))
+
+	err := dao.AddMember(member)
+	urequire.NoError(t, err)
+	uassert.Equal(t, 2, len(dao.Members()))
+	uassert.True(t, dao.IsMember(member))
+
+	err = dao.AddMember(member)
+	uassert.ErrorIs(t, err, ErrMemberExists)
+}
+
+func TestAdminDAORemoveMember(t *testing.T) {
+	member := std.Address("g1jg8mtutu9khhfwc4nxmuhcpftf0pajdhfvsqf5")
+	dao := New(WithMember(member))
+
+	removed := dao.RemoveMember(member)
+	urequire.True(t, removed)
+
+	removed = dao.RemoveMember(member)
+	urequire.False(t, removed)
+}
+
 func TestAdminDAOIsMember(t *testing.T) {
 	cases := []struct {
 		name   string