TweetDuck/Dialogs/Settings/DialogSettingsManage.cs

using System;
using System.Collections.Generic;
using System.IO;
using System.Windows.Forms;
using TweetDuck.Management;
using TweetLib.Core;
using TweetLib.Core.Features.Plugins;
using TweetLib.Core.Systems.Configuration;

namespace TweetDuck.Dialogs.Settings {
	sealed partial class DialogSettingsManage : Form {
		private enum State {
			Deciding,
			Reset,
			Import,
			Export
		}

		private ProfileManager.Items SelectedItems {
			get => _selectedItems;

			set {
				// this will call events and SetFlag, which also updates the UI
				foreach (KeyValuePair<CheckBox, ProfileManager.Items> kvp in checkBoxMap) {
					kvp.Key.Checked = value.HasFlag(kvp.Value);
				}
			}
		}

		public bool IsRestarting { get; private set; }
		public bool ShouldReloadBrowser { get; private set; }

		private readonly PluginManager plugins;
		private readonly Dictionary<CheckBox, ProfileManager.Items> checkBoxMap = new Dictionary<CheckBox, ProfileManager.Items>(4);
		private readonly bool openImportImmediately;

		private State currentState;
		private ProfileManager importManager;
		private bool requestedRestartFromConfig;

		private ProfileManager.Items _selectedItems = ProfileManager.Items.None;

		public DialogSettingsManage(PluginManager plugins, bool openImportImmediately = false) {
			InitializeComponent();

			this.plugins = plugins;
			this.currentState = State.Deciding;

			this.checkBoxMap[cbProgramConfig] = ProfileManager.Items.UserConfig;
			this.checkBoxMap[cbSystemConfig] = ProfileManager.Items.SystemConfig;
			this.checkBoxMap[cbSession] = ProfileManager.Items.Session;
			this.checkBoxMap[cbPluginData] = ProfileManager.Items.PluginData;

			this.openImportImmediately = openImportImmediately;

			if (openImportImmediately) {
				radioImport.Checked = true;
				btnContinue_Click(null, EventArgs.Empty);
			}
		}

		private void radioDecision_CheckedChanged(object sender, EventArgs e) {
			btnContinue.Enabled = true;
		}

		private void checkBoxSelection_CheckedChanged(object sender, EventArgs e) {
			CheckBox cb = (CheckBox) sender;
			SetFlag(checkBoxMap[cb], cb.Checked);
		}

		private void btnContinue_Click(object sender, EventArgs e) {
			string file;

			switch (currentState) {
				case State.Deciding:
					// Reset
					if (radioReset.Checked) {
						currentState = State.Reset;

						Text = "Restore Defaults";
						SelectedItems = ProfileManager.Items.UserConfig;
					}

					// Import
					else if (radioImport.Checked) {
						using (OpenFileDialog dialog = new OpenFileDialog {
							AutoUpgradeEnabled = true,
							DereferenceLinks = true,
							Title = "Import TweetDuck Profile",
							Filter = "TweetDuck Profile (*.tdsettings)|*.tdsettings"
						}) {
							if (dialog.ShowDialog() != DialogResult.OK) {
								if (openImportImmediately) {
									Close();
								}

								return;
							}

							file = dialog.FileName;
						}

						importManager = new ProfileManager(file, plugins);
						currentState = State.Import;

						Text = "Import Profile";
						SelectedItems = importManager.FindImportItems();

						foreach (CheckBox cb in checkBoxMap.Keys) {
							cb.Enabled = cb.Checked;
						}
					}

					// Export
					else if (radioExport.Checked) {
						currentState = State.Export;

						Text = "Export Profile";
						btnContinue.Text = "Export Profile";
						SelectedItems = ProfileManager.Items.UserConfig | ProfileManager.Items.PluginData;
					}

					// Continue...
					panelDecision.Visible = false;
					panelSelection.Visible = true;
					Height += panelSelection.Height - panelDecision.Height;
					break;

				case State.Reset:
					if (FormMessage.Warning("Reset TweetDuck Options", "This will reset the selected items. Are you sure you want to proceed?", FormMessage.Yes, FormMessage.No)) {
						App.ConfigManager.ProgramRestartRequested += Config_ProgramRestartRequested;

						if (SelectedItems.HasFlag(ProfileManager.Items.UserConfig)) {
							Program.Config.User.Reset();
						}

						if (SelectedItems.HasFlag(ProfileManager.Items.SystemConfig)) {
							Program.Config.System.Reset();
						}

						App.ConfigManager.ProgramRestartRequested -= Config_ProgramRestartRequested;

						if (SelectedItems.HasFlag(ProfileManager.Items.Session)) {
							ProfileManager.DeleteAuthCookie();
						}

						if (SelectedItems.HasFlag(ProfileManager.Items.PluginData)) {
							Program.Config.Plugins.Reset();

							try {
								Directory.Delete(plugins.PluginDataFolder, true);
							} catch (Exception ex) {
								App.ErrorHandler.HandleException("Profile Reset", "Could not delete plugin data.", true, ex);
							}
						}

						if (requestedRestartFromConfig && FormMessage.Information("Profile Reset", "The application must restart for some of the restored options to take place. Do you want to restart now?", FormMessage.Yes, FormMessage.No)) {
							RestartProgram();
						}

						ShouldReloadBrowser = true;

						DialogResult = DialogResult.OK;
						Close();
					}

					break;

				case State.Import:
					if (importManager.Import(SelectedItems)) {
						App.ConfigManager.ProgramRestartRequested += Config_ProgramRestartRequested;
						App.ConfigManager.ReloadAll();
						App.ConfigManager.SaveAll();
						App.ConfigManager.ProgramRestartRequested -= Config_ProgramRestartRequested;

						if (requestedRestartFromConfig && FormMessage.Information("Profile Import", "The application must restart for some of the imported options to take place. Do you want to restart now?", FormMessage.Yes, FormMessage.No)) {
							RestartProgram();
						}
					}

					ShouldReloadBrowser = true;

					DialogResult = DialogResult.OK;
					Close();
					break;

				case State.Export:
					using (SaveFileDialog dialog = new SaveFileDialog {
						AddExtension = true,
						AutoUpgradeEnabled = true,
						OverwritePrompt = true,
						DefaultExt = "tdsettings",
						FileName = "TweetDuck.tdsettings",
						Title = "Export TweetDuck Profile",
						Filter = "TweetDuck Profile (*.tdsettings)|*.tdsettings"
					}) {
						if (dialog.ShowDialog() != DialogResult.OK) {
							return;
						}

						file = dialog.FileName;
					}

					new ProfileManager(file, plugins).Export(SelectedItems);

					DialogResult = DialogResult.OK;
					Close();
					break;
			}
		}

		private void btnCancel_Click(object sender, EventArgs e) {
			DialogResult = DialogResult.Cancel;
			Close();
		}

		private void Config_ProgramRestartRequested(object sender, EventArgs e) {
			requestedRestartFromConfig = true;
		}

		private void SetFlag(ProfileManager.Items flag, bool enable) {
			_selectedItems = enable ? _selectedItems | flag : _selectedItems & ~flag;
			btnContinue.Enabled = _selectedItems != ProfileManager.Items.None;

			if (currentState == State.Import) {
				btnContinue.Text = "Import Profile";
			}
			else if (currentState == State.Reset) {
				btnContinue.Text = "Restore Defaults";
			}
		}

		private void RestartProgram() {
			IsRestarting = true;
			Program.Restart();
		}
	}
}