classdef Equipment < handle
    %EQUIPMENT Summary of this class goes here
    %   Detailed explanation goes here
    
    properties (SetAccess=private)
        name
        tcp
        channel
    end
    
    methods
        function ecq = Equipment(name,ipAddress,port,channel)
            ecq.name = name;
            ecq.tcp = Equipment.getTCP(ipAddress,port);
            ecq.channel = channel;
        end
        function idn(ecq)
            fprintf(ecq.tcp,['++addr ',num2str(ecq.channel)]);
            fprintf(ecq.tcp,'*idn?');
            fprintf(ecq.tcp,'++read');
            fprintf(fscanf(ecq.tcp));
        end
        function starttcp(DMM)
            fopen(DMM.tcp);
        end
    end
    methods (Static)
        function tcpobject = getTCP(ipAddress,port)
            persistent tcpconnection;
            ipname = Equipment.ip2structname(ipAddress);
            if isempty(tcpconnection)
                tcpconnection = struct;
            end
            
            if ~isfield(tcpconnection, ipname)
                tcpconnection.(ipname).tcp = tcpip(ipAddress,port);
                tcpconnection.(ipname).nopen = 1;
                fopen(tcpconnection.(ipname).tcp);
            else
                tcpconnection.(ipname).nopen = tcpconnection.(ipname).nopen + 1;
            end
            tcpobject = tcpconnection.(ipname).tcp;
        end
        
        function iptest(ipAddress)
            validip = regexp(ipAddress,'^(?:(25[0-5]|2[0-4][0-9]|[01]?[0-9]?[0-9])\.(25[0-5]|2[0-4][0-9]|[01]?[0-9]?[0-9])\.(25[0-5]|2[0-4][0-9]|[01]?[0-9]?[0-9])\.(25[0-5]|2[0-4][0-9]|[01]?[0-9]?[0-9]))$', 'once');
            if isempty(validip)
                error('Invalid IP-address');
            end
        end
        function structname = ip2structname(ipAddress)
            Equipment.iptest(ipAddress);
            ipmatch = regexprep(ipAddress,'\.','_');
            structname = ['ip',ipmatch];
        end
    end
end

% classdef BankAccount < handle
%    properties (Access = ?AccountManager)
%       AccountStatus = 'open'
%    end
%    properties (SetAccess = private)
%       AccountNumber
%       AccountBalance
%    end
%    properties (Transient)
%       AccountListener
%    end
%    events
%       InsufficientFunds
%    end
%    methods
%       function BA = BankAccount(accNum,initBal)
%          BA.AccountNumber = accNum;
%          BA.AccountBalance = initBal;
%          BA.AccountListener =  AccountManager.addAccount(BA);
%       end
%       function deposit(BA,amt)
%          BA.AccountBalance = BA.AccountBalance + amt;
%          if BA.AccountBalance > 0
%             BA.AccountStatus = 'open';
%          end
%       end
%       function withdraw(BA,amt)
%          if (strcmp(BA.AccountStatus,'closed')&& BA.AccountBalance <= 0)
%             disp(['Account ',num2str(BA.AccountNumber),' has been closed.'])
%             return
%          end
%          newbal = BA.AccountBalance - amt;
%          BA.AccountBalance = newbal;
%          if newbal < 0
%             notify(BA,'InsufficientFunds')
%          end
%       end
%       function getStatement(BA)
%          disp('-------------------------')
%          disp(['Account: ',num2str(BA.AccountNumber)])
%          ab = sprintf('%0.2f',BA.AccountBalance);
%          disp(['CurrentBalance: ',ab])
%          disp(['Account Status: ',BA.AccountStatus])
%          disp('-------------------------')
%       end
%    end
%    methods (Static)
%       function obj = loadobj(s)
%          if isstruct(s)
%             accNum = s.AccountNumber;
%             initBal = s.AccountBalance;
%             obj = BankAccount(accNum,initBal);
%          else
%             obj.AccountListener = AccountManager.addAccount(s);
%          end
%       end
%    end
% end