103 lines
2.8 KiB
C#
103 lines
2.8 KiB
C#
/*
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* Copyright (c) 2019 ETH Zürich, Educational Development and Technology (LET)
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*/
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using System;
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using System.Collections.Generic;
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using System.Linq;
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namespace SafeExamBrowser.ResetUtility.Procedure
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{
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internal class MainMenu : ProcedureStep
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{
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private IList<Option> options;
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public MainMenu(Context context) : base(context)
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{
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options = new List<Option>
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{
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new Option { IsSelected = true, NextStep = new Restore(Context), Result = ProcedureStepResult.Continue, Text = "Restore system configuration via backup mechanism" },
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new Option { NextStep = new Reset(Context), Result = ProcedureStepResult.Continue, Text = "Reset system configuration to default values" },
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new Option { NextStep = new ShowVersion(Context), Result = ProcedureStepResult.Continue, Text = "Show version information" },
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new Option { NextStep = new ShowLog(Context), Result = ProcedureStepResult.Continue, Text = "Show application log" },
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new Option { Result = ProcedureStepResult.Terminate, Text = "Exit" }
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};
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}
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internal override ProcedureStepResult Execute()
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{
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PrintMenu();
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for (var key = Console.ReadKey(true).Key; key != ConsoleKey.Enter; key = Console.ReadKey(true).Key)
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{
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if (key == ConsoleKey.UpArrow || key == ConsoleKey.DownArrow)
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{
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SelectNextOption(key);
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PrintMenu();
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}
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}
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return options.First(o => o.IsSelected).Result;
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}
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internal override ProcedureStep GetNextStep()
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{
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return options.First(o => o.IsSelected).NextStep;
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}
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private void PrintMenu()
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{
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InitializeConsole();
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Console.WriteLine("Please choose one of the following options:");
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Console.WriteLine();
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foreach (var option in options)
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{
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Console.WriteLine(option.ToString());
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}
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Console.WriteLine();
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Console.WriteLine("Use the up/down arrow keys and enter to navigate the menu.");
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}
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private void SelectNextOption(ConsoleKey key)
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{
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var current = options.First(o => o.IsSelected);
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var currentIndex = options.IndexOf(current);
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var nextIndex = default(int);
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if (key == ConsoleKey.UpArrow)
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{
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nextIndex = --currentIndex < 0 ? options.Count - 1 : currentIndex;
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}
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if (key == ConsoleKey.DownArrow)
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{
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nextIndex = ++currentIndex == options.Count ? 0 : currentIndex;
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}
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var next = options.ElementAt(nextIndex);
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current.IsSelected = false;
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next.IsSelected = true;
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}
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private class Option
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{
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public bool IsSelected { get; set; }
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public ProcedureStep NextStep { get; set; }
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public ProcedureStepResult Result { get; set; }
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public string Text { get; set; }
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public override string ToString()
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{
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return $"[{(IsSelected ? "x" : " ")}] {Text}";
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}
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}
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}
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}
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