public static Command Parse(string inputCommand)
{
if (inputCommand == null)
{
throw new ArgumentNullException("Input command can't be null.");
}
int commandNameEndIndex = inputCommand.IndexOf(' ');
if (commandNameEndIndex == -1)
{
throw new ArgumentException("Invalid command: " + inputCommand);
}
string commandName = inputCommand.Substring(0, commandNameEndIndex);
string parametters = inputCommand.Substring(commandNameEndIndex + 1);
string[] commandArguments = parametters.Split('|');
for (int i = 0; i < commandArguments.Length; i++)
{
parametters = commandArguments[i];
commandArguments[i] = parametters.Trim();
}
Command parsedCommand = new Command { CommandName = commandName, Params = commandArguments };
return parsedCommand;
}
private string ProcessCommandAddEvent(Command command)
{
if (command.Params.Length != 2 && command.Params.Length != 3)
{
throw new ArgumentException("Invalid number of command parameters.");
}
DateTime date = DateTime.ParseExact(command.Params[0], "yyyy-MM-ddTHH:mm:ss", CultureInfo.InvariantCulture);
string title = command.Params[1];
string location;
if (command.Params.Length == 2) // there isn't location
{
location = null;
}
else
{
location = command.Params[2];
}
Event newEvent = new Event()
{
Date = date,
Title = title,
Location = location
};
this.eventsManager.AddEvent(newEvent);
return "Event added";
}
public static Command Parse(string inputCommand)
{
int sepatator = inputCommand.IndexOf(' ');
if (sepatator == -1)
{
throw new IndexOutOfRangeException("Invalid command order: " + inputCommand);
}
string name = inputCommand.Substring(0, sepatator);
string parameters = inputCommand.Substring(sepatator + 1);
var commandArguments = parameters.Split('|');
for (int i = 0; i < commandArguments.Length; i++)
{
parameters = commandArguments[i];
commandArguments[i] = parameters.Trim();
}
var command = new Command(name, commandArguments);
//var command = new Command {CommandName = name, Arguments = commandArguments};
return command;
}
public void Parse_InvalidCommandWithNewLineIn()
{
string commandStr = "AddEvent 2012-01-21T20:00:00" + Environment.NewLine + " | party Viki | home";
Command command = new Command();
command = Command.Parse(commandStr);
}
/// <summary>
/// Converts string to an instance of command
/// </summary>
/// <param name="commandText">A string representing the command</param>
/// <returns>Parsed command</returns>
public static Command Parse(string commandText)
{
if (commandText == null)
{
throw new ArgumentNullException("commandText");
}
int spaceIndex = commandText.IndexOf(' ');
if (spaceIndex == -1)
{
throw new ArgumentException("Invalid command: " + commandText);
}
string commandName = commandText.Substring(0, spaceIndex);
string argumentsString = commandText.Substring(spaceIndex + 1);
var commandArguments = argumentsString.Split('|');
for (int i = 0; i < commandArguments.Length; i++)
{
commandArguments[i] = commandArguments[i].Trim();
}
var command = new Command { Name = commandName, Arguments = commandArguments };
return command;
}
public void Parse_InvalidCommandType()
{
string commandStr = "Add 2012-01-21T20:00:00 | party Viki | home";
Command command = new Command();
command = Command.Parse(commandStr);
}
public void Parse_InvalidCommandWithoutSpace()
{
string commandStr = "AddEvent2012-01-21T20:00:00|party|home";
Command command = new Command();
command = Command.Parse(commandStr);
}
public void Parse_InvalidCommandWithoutVerticalLineBetweenParams()
{
string commandStr = "AddEvent 2012-01-21T20:00:00 party Viki home";
Command command = new Command();
command = Command.Parse(commandStr);
}
public string ProcessCommand(Command command)
{
if ((command.CommandName == "AddEvent") && (command.Parameters.Length == 2))
{
return ProcessCommandAddWithTwoParams(command);
}
if ((command.CommandName == "AddEvent") && (command.Parameters.Length == 3))
{
return ProcessCommandAddWithThreeParams(command);
}
if ((command.CommandName == "DeleteEvents") && (command.Parameters.Length == 1))
{
return ProcessCommandDeleteEvents(command);
}
if ((command.CommandName == "ListEvents") && (command.Parameters.Length == 2))
{
return ProcessCommandListEvents(command);
}
else
{
throw new ArgumentException("Invalid command!No such command {0}", command.CommandName);
}
}
private string ExecuteAddEvent(Command command)
{
var date = DateTime.ParseExact(
command.Parameters[0],
"yyyy-MM-ddTHH:mm:ss",
CultureInfo.InvariantCulture);
var eventItem = new Event
{
Date = date,
Title = command.Parameters[1],
};
if (command.Parameters.Length == 2)
{
eventItem.Location = null;
}
else if (command.Parameters.Length == 3)
{
eventItem.Location = command.Parameters[2];
}
else
{
throw new ArgumentException("WTF " + command.Name + " is?", "command.CommandName");
}
this.eventsManager.AddEvent(eventItem);
return "Event added";
}
private string AddEvent(Command command)
{
var date = DateTime.ParseExact(
command.paramms[0], "yyyy-MM-ddTHH:mm:ss", CultureInfo.InvariantCulture);
if (command.paramms.Length == 2)
{
var ev = new Event
{
date = date,
Title = command.paramms[1],
Location = null,
};
this.eventsManager.AddEvent(ev);
}
if (command.paramms.Length == 3)
{
var ev = new Event
{
date = date,
Title = command.paramms[1],
Location = command.paramms[2],
};
this.eventsManager.AddEvent(ev);
}
return "Event added";
}
/// <summary>
/// Process a command using an event processor
/// </summary>
/// <param name="command">The command to process</param>
/// <returns>String representing the result of command processing</returns>
public string ProcessCommand(Command command)
{
if ((command.Name == AddEventCommandName) && (command.Arguments.Length == 2))
{
var date = DateTime.ParseExact(command.Arguments[0], Event.DateFormat, CultureInfo.InvariantCulture);
return this.ProcessAddEventCommand(date, command.Arguments[1]);
}
if ((command.Name == AddEventCommandName) && (command.Arguments.Length == 3))
{
var date = DateTime.ParseExact(command.Arguments[0], Event.DateFormat, CultureInfo.InvariantCulture);
return this.ProcessAddEventCommand(date, command.Arguments[1], command.Arguments[2]);
}
if ((command.Name == DeleteEventCommandName) && (command.Arguments.Length == 1))
{
return this.ProcessDeleteEventsCommand(command.Arguments[0]);
}
if ((command.Name == ListEventCommandName) && (command.Arguments.Length == 2))
{
var date = DateTime.ParseExact(command.Arguments[0], Event.DateFormat, CultureInfo.InvariantCulture);
var count = int.Parse(command.Arguments[1]);
return this.ProcessListEventsCommand(date, count);
}
throw new ArgumentException("Unknown command: " + command.Name);
}
public void TestProcessDeleteExistingEvents()
{
CommandExecutor cmdExecutor = new CommandExecutor(new EventsManagerFast());
Command addCommand = new Command
{
CommandName = "AddEvent",
Parameters = new string[]
{
"2001-01-01T10:30:03",
"party Lora"
}
};
cmdExecutor.ProcessCommand(addCommand);
Command deleteCommand = new Command
{
CommandName = "DeleteEvents",
Parameters = new string[]
{
"party Lora",
}
};
string result = cmdExecutor.ProcessCommand(deleteCommand);
Assert.AreEqual("1 events deleted", result);
}
public string ProcessCommand(Command command)
{
if (command.CommandName == "AddEvent")
{
string location;
if (command.Parameters.Length == 2)
{
location = null;
}
else
{
location = command.Parameters[2];
}
var date = DateTime.ParseExact(command.Parameters[0], DateFormat, CultureInfo.InvariantCulture);
var title = command.Parameters[1];
Event newEvent = new Event(date, title, location);
this.eventsManagerList.AddEvent(newEvent);
return "Event added";
}
if ((command.CommandName == "DeleteEvents") && (command.Parameters.Length == 1))
{
int numberOfAddedEvents = this.eventsManagerList.DeleteEventsByTitle(command.Parameters[0]);
if (numberOfAddedEvents == 0)
{
return "No events found";
}
return numberOfAddedEvents + " events deleted";
}
if ((command.CommandName == "ListEvents") && (command.Parameters.Length == 2))
{
var date = DateTime.ParseExact(command.Parameters[0], DateFormat, CultureInfo.InvariantCulture);
var numberOfElementsToList = int.Parse(command.Parameters[1]);
var eventsList = this.eventsManagerList.ListEvents(date, numberOfElementsToList).ToList();
if (!eventsList.Any())
{
return "No events found";
}
StringBuilder result = new StringBuilder();
foreach (var ev in eventsList)
{
result.AppendLine(ev.ToString());
}
return result.ToString().Trim();
}
throw new ArgumentException("Invalid command name: " + command.CommandName);
}
public string ProcessCommand(Command command)
{
switch (command.CommandType)
{
case "AddEvent": return AddEvent(command);
case "DeleteEvents": return DeleteEvents(command);
case "ListEvents": return ListEvents(command);
default: throw new ArgumentException("This " + command.CommandType + " is not valid!");
}
}
private string DeleteEvents(Command command)
{
int count = this.eventsManager.DeleteEventsByTitle(command.paramms[0]);
if (count == 0)
{
return "No events found";
}
return count + " events deleted";
}
private string DeleteEvents(Command cmd)
{
int deletedEventsCount = this.eventsManager.DeleteEventsByTitle(cmd.CommandParams[0]);
if (deletedEventsCount == 0)
{
return "No events found";
}
return deletedEventsCount + " events deleted";
}
private string DeleteEvents(Command command)
{
string eventTitle = command.Parameters[0];
int eventsDeleted = this.eventsManager.DeleteEventsByTitle(eventTitle);
if (eventsDeleted == 0)
{
return "No events found";
}
return string.Format("{0} events deleted", eventsDeleted);
}
public void TestParseAddWithFourParameters()
{
string inputCommand = "AddEvent 2011-11-11T11:11:22 | party Viki 22 | home ";
Command actualCommand = Command.Parse(inputCommand);
Command expectedCommand = new Command
{
CommandName = "AddEvent",
Parameters = new string[] { "2011-11-11T11:11:22", "party Viki 22", "home" }
};
Assert.AreEqual<Command>(expectedCommand, actualCommand);
}
public void TestParseAddWithTwoParametersWithHour()
{
string inputCommand = "AddEvent 2011-01-09T03:00:59 | party Viki (11:33)";
Command actualCommand = Command.Parse(inputCommand);
Command expectedCommand = new Command
{
CommandName = "AddEvent",
Parameters = new string[] { "2011-01-09T03:00:59", "party Viki (11:33)" }
};
Assert.AreEqual(expectedCommand, actualCommand);
}
public void TestParseWithTwoParameters()
{
string inputCommand = "AddEvent 2012-03-26T08:00:00 | C# exam";
Command actualCommand = Command.Parse(inputCommand);
Command expectedCommand = new Command
{
CommandName = "AddEvent",
Parameters = new string[] { "2012-03-26T08:00:00", "C# exam" }
};
Assert.AreEqual(expectedCommand, actualCommand);
}
public void TestProcessDeleteEventsCommandWithTwoParameters()
{
CommandExecutor cmdExecutor = new CommandExecutor(new EventsManagerFast());
Command cmd = new Command
{
CommandName = "DeleteEvents",
Parameters = new string[]
{
"Rock party",
}
};
string result = cmdExecutor.ProcessCommand(cmd);
Assert.AreEqual("No events found", result);
}
public string ProcessCommand(Command command)
{
switch (command.CommandName)
{
case AddEventCommand:
return ProcessCommandAddEvent(command);
case DeleteEventsCommand:
return ProcessDeleteEventsCommand(command);
case ListEventsCommand:
return ProcessListEventsCommand(command);
default:
throw new ArgumentException("Invalid command name " + command.CommandName);
}
}
public static Command Parse(string command)
{
if (command.Contains(Environment.NewLine))
{
throw new FormatException("Command cannot containes symbol for new line.");
}
int endOfCommandName = command.IndexOf(' ');
if (endOfCommandName == -1)
{
string exceptionMessage = string.Format("Invalid command: {0}", command);
throw new FormatException(exceptionMessage);
}
string commandName = command.Substring(0, endOfCommandName);
string commandParams = command.Substring(endOfCommandName + 1);
if (!commandParams.Contains(" | ") && (commandName == "AddEvent" || commandName == "ListEvents"))
{
throw new FormatException("Invalid command parametars. Parametars should be separeted with ' | '.");
}
var commandArguments = commandParams.Split('|');
for (int i = 0; i < commandArguments.Length; i++)
{
commandParams = commandArguments[i];
commandArguments[i] = commandParams.Trim();
}
CommandType currandCommandType;
switch (commandName)
{
case "AddEvent":
currandCommandType = CommandType.AddEvent;
break;
case "DeleteEvents":
currandCommandType = CommandType.DeleteEvents;
break;
case "ListEvents":
currandCommandType = CommandType.ListEvents;
break;
default:
throw new ArgumentException("Wrong command type!");
}
var commandFull = new Command(currandCommandType, commandArguments);
return commandFull;
}
private string ProcessAddEvent(Command command)
{
if (!(command.Parameters.Count == 2 || command.Parameters.Count == 3))
{
throw new FormatException("Invalid number of parameters: " + command.Parameters.Count);
}
DateTime date = ParseDate(command.Parameters[0]);
string title = command.Parameters[1];
string location = (command.Parameters.Count == 3) ? command.Parameters[2] : null;
Event @event = new Event(date, title, location);
this.eventsManager.AddEvent(@event);
return "Event added";
}
public void TestProcessAddEventCommandWithTwoParameters()
{
CommandExecutor cmdExecutor = new CommandExecutor(new EventsManagerFast());
Command cmd = new Command
{
CommandName = "AddEvent",
Parameters = new string[]
{
"2001-01-01T10:30:03",
"party Lora"
}
};
string result = cmdExecutor.ProcessCommand(cmd);
Assert.AreEqual("Event added", result);
}
private string ProcessCommandAddWithTwoParams(Command command)
{
DateTime date = DateTime.ParseExact(command.Parameters[0], "yyyy-MM-ddTHH:mm:ss", CultureInfo.InvariantCulture);
Event ev = new Event
{
DateTime = date,
Title = command.Parameters[1],
Location = null,
};
this.eventsProcessor.AddEvent(ev);
string message = "Event added";
return message;
}
public void Parse_ValidCommandDeleteEvents()
{
string commandDeleteStr = "DeleteEvents c# exam";
Command command = new Command();
command = Command.Parse(commandDeleteStr);
bool isCommandNameValid = command.CommandName == CommandType.DeleteEvents;
string[] parametars = command.Parametars;
string title = parametars[0];
bool isTitleCorrect = title == "c# exam";
bool isParseValid = isCommandNameValid && isTitleCorrect;
Assert.IsTrue(isParseValid, "Parse with valid input does not work correct.");
}
private string ProcessDeleteEvents(Command command)
{
if (!(command.Parameters.Count == 1))
{
throw new FormatException("Invalid number of parameters: " + command.Parameters.Count);
}
int numberOfDeletedEvents = this.eventsManager.DeleteEventsByTitle(command.Parameters[0]);
if (numberOfDeletedEvents == 0)
{
return "No events found";
}
return numberOfDeletedEvents + " events deleted";
}
/// <summary>
/// Processes the delete events command.
/// </summary>
/// <param name="command">The command.</param>
/// <returns>Output result</returns>
private string ProcessDeleteEventsCommand(Command command)
{
if (command.Parameters.Length != 1)
{
throw new ArgumentException("The number of parameters in DeleteEvents command must be 1");
}
int deletedEventsCount = this.eventManager.DeleteEventsByTitle(command.Parameters[0]);
if (deletedEventsCount == 0)
{
return "No events found";
}
return deletedEventsCount + " events deleted";
}
