public RemoveCommand(DBReceiver receiver)
{
this.receiver = receiver;
}
static void Main(string[] args)
{
DBReceiver receiver = new DBReceiver();
Invoker invoker = new Invoker();
AddCommand addCommand = new AddCommand(receiver);
UpdateCommand updateCommand = new UpdateCommand(receiver);
RemoveCommand removeCommand = new RemoveCommand(receiver);
MacroCommand macroCommand = new MacroCommand(receiver);
int operations = 0;
bool partOfMacro = false;
Stack <string> cmdStack = new Stack <string>();
// IMPORTANT!!! This line supposes that the filename is
// the first argument on the command line per instruction.
// If you are not testing this from the command line, please
// insert file name below.
string fileName = "file.txt";
// string fileName = args[1];
System.IO.StreamReader file = new System.IO.StreamReader(fileName);
string line;
while ((line = file.ReadLine()) != null)
{
Entry entry = new Entry();
if (line != "")
{
string operation = line;
if (operation != "E" && operation != "B")
{
operation = line.Substring(0, line.IndexOf(' '));
line = line.Substring(line.IndexOf(' ')).TrimStart();
entry.DbID = line.Substring(0, line.IndexOf(' '));
line = line.Substring(line.IndexOf(' ')).TrimStart();
entry.DbKey = line.Substring(0, line.IndexOf(' '));
line = line.Substring(line.IndexOf(' ')).TrimStart();
entry.DbValue = line.Substring(0, line.Length);
}
switch (operation)
{
default:
break;
case "A":
if (!partOfMacro)
{
operations++;
cmdStack.Push("A");
}
invoker.ExecuteCommand(addCommand, entry);
break;
case "U":
if (!partOfMacro)
{
operations++;
cmdStack.Push("U");
}
invoker.ExecuteCommand(updateCommand, entry);
break;
case "R":
if (!partOfMacro)
{
operations++;
cmdStack.Push("R");
}
invoker.ExecuteCommand(removeCommand, entry);
break;
case "B":
cmdStack.Push("B");
invoker.BeginMacro(macroCommand);
partOfMacro = true;
break;
case "E":
cmdStack.Push("E");
invoker.EndMacro();
operations++;
partOfMacro = false;
break;
}
}
}
foreach (var item in receiver.GetDatabases())
{
item.Display();
}
while (operations != 0)
{
switch (cmdStack.Pop())
{
default:
break;
case "A":
invoker.UndoCommand(addCommand);
operations--;
break;
case "U":
invoker.UndoCommand(updateCommand);
operations--;
break;
case "R":
invoker.UndoCommand(removeCommand);
operations--;
break;
case "B":
Console.WriteLine("Macro Unexecuted");
operations--;
break;
case "E":
invoker.UndoCommand(macroCommand);
break;
}
}
Console.ReadKey();
}
public MacroCommand(DBReceiver receiver)
{
this.receiver = receiver;
}
public AddCommand(DBReceiver receiver)
{
this.receiver = receiver;
}
public UpdateCommand(DBReceiver receiver)
{
this.receiver = receiver;
}