func()

in store/cluster_shard.go [96:112]

• 17 lines of code
• 7 McCabe index (conditional complexity)

func (shard *Shard) addNode(addr, role, password string) error {
	if role != RoleMaster && role != RoleSlave {
		return fmt.Errorf("%w: role", consts.ErrInvalidArgument)
	}
	for _, node := range shard.Nodes {
		if node.Addr() == addr {
			return consts.ErrAlreadyExists
		}
	}
	if role == RoleMaster && len(shard.Nodes) > 0 {
		return fmt.Errorf("master node %w", consts.ErrAlreadyExists)
	}
	node := NewClusterNode(addr, password)
	node.SetRole(role)
	shard.Nodes = append(shard.Nodes, node)
	return nil
}