public static void Execute(ProgramExecutionOptions options) { if (ProgramUtil.ShowHelpIfNeeded(options)) { return; } bool everythingOk = true; int count = 0; ClearMode mode = ClearMode.Top; if (options.ParsedArguments.Count == 0) { count = DataHolder.TerminalData.AllEntries.Count; } else if (CommandLineUtil.ValidateArguments(options.ParsedArguments, Validations)) { Pair <string, string> modeArg; Pair <string, string> countArg; bool modePresent = CommandLineUtil.TryGetArgumentByName(options.ParsedArguments, ModeArgName, out modeArg); bool countPresent = CommandLineUtil.TryGetArgumentByName(options.ParsedArguments, CountArgName, out countArg); if (modePresent && !countPresent) { var msg = "You need to supply the number of line to clear when using the mode argument."; msg = TextUtil.Error(msg); TerminalUtil.ShowText(msg); everythingOk = false; } if (countPresent && !modePresent) { var msg = "You need to supply the mode argument when removing a specific quantity of lines."; msg = TextUtil.Error(msg); TerminalUtil.ShowText(msg); everythingOk = false; } if (everythingOk) { if (!MiscUtil.TryParseEnum(modeArg.Value, out mode)) { var msg = string.Format("'{0}' is not a valid clear mode. It must be either 'top' or 'down'.", modeArg.Value); msg = TextUtil.Error(msg); TerminalUtil.ShowText(msg); everythingOk = false; } else if (!int.TryParse(countArg.Value, out count)) { var msg = string.Format("'{0}' is not a valid number of lines!", countArg.Value); msg = TextUtil.Error(msg); TerminalUtil.ShowText(msg); everythingOk = false; } } } else { everythingOk = false; var modeResult = ModeValidation.ValidationResult; var countResult = CountValidation.ValidationResult; if (MathUtil.ContainsFlag((int)modeResult, (int)ArgValidationResult.EmptyValue)) { var msg = "The 'mode' argument must be either 'top' or 'down'."; msg = TextUtil.Error(msg); TerminalUtil.ShowText(msg); } else if (MathUtil.ContainsFlag((int)modeResult, (int)ArgValidationResult.Duplicated)) { var msg = "Please supply only one 'mode' argument."; msg = TextUtil.Error(msg); TerminalUtil.ShowText(msg); } } if (everythingOk) { if (mode == ClearMode.Bottom) { TerminalUtil.RemoveTextEntries(count, TerminalEntryRemoveType.NewerEntries); } else { TerminalUtil.RemoveTextEntries(count, TerminalEntryRemoveType.OlderEntries); } } }