mirror of
https://github.com/ShareX/ShareX.git
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305 lines
No EOL
11 KiB
C#
305 lines
No EOL
11 KiB
C#
#region License Information (GPL v3)
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/*
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ShareX - A program that allows you to take screenshots and share any file type
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Copyright (c) 2007-2020 ShareX Team
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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Optionally you can also view the license at <http://www.gnu.org/licenses/>.
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*/
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#endregion License Information (GPL v3)
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using Newtonsoft.Json;
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using Newtonsoft.Json.Converters;
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using System;
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using System.Collections.Generic;
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using System.ComponentModel;
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using System.IO;
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using System.Linq;
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using System.Threading.Tasks;
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using System.Windows.Forms;
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namespace ShareX.HelpersLib
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{
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public abstract class SettingsBase<T> where T : SettingsBase<T>, new()
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{
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public delegate void SettingsSavedEventHandler(T settings, string filePath, bool result);
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public event SettingsSavedEventHandler SettingsSaved;
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public delegate void SettingsSaveFailedEventHandler(Exception e);
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public event SettingsSaveFailedEventHandler SettingsSaveFailed;
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[Browsable(false), JsonIgnore]
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public string FilePath { get; private set; }
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[Browsable(false)]
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public string ApplicationVersion { get; set; }
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[Browsable(false), JsonIgnore]
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public bool IsFirstTimeRun { get; private set; }
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[Browsable(false), JsonIgnore]
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public bool IsUpgrade { get; private set; }
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[Browsable(false), JsonIgnore]
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public string BackupFolder { get; set; }
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[Browsable(false), JsonIgnore]
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public bool CreateBackup { get; set; }
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[Browsable(false), JsonIgnore]
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public bool CreateWeeklyBackup { get; set; }
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[Browsable(false), JsonIgnore]
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public bool SupportDPAPIEncryption { get; set; }
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public bool IsUpgradeFrom(string version)
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{
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return IsUpgrade && Helpers.CompareVersion(ApplicationVersion, version) <= 0;
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}
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protected virtual void OnSettingsSaved(string filePath, bool result)
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{
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SettingsSaved?.Invoke((T)this, filePath, result);
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}
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protected virtual void OnSettingsSaveFailed(Exception e)
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{
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SettingsSaveFailed?.Invoke(e);
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}
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public bool Save(string filePath)
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{
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FilePath = filePath;
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ApplicationVersion = Application.ProductVersion;
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bool result = SaveInternal(FilePath);
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OnSettingsSaved(FilePath, result);
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return result;
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}
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public bool Save()
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{
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return Save(FilePath);
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}
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public void SaveAsync(string filePath)
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{
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Task.Run(() => Save(filePath));
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}
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public void SaveAsync()
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{
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SaveAsync(FilePath);
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}
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private bool SaveInternal(string filePath)
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{
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string typeName = GetType().Name;
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DebugHelper.WriteLine($"{typeName} save started: {filePath}");
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bool isSuccess = false;
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try
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{
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if (!string.IsNullOrEmpty(filePath))
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{
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lock (this)
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{
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Helpers.CreateDirectoryFromFilePath(filePath);
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string tempFilePath = filePath + ".temp";
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using (FileStream fileStream = new FileStream(tempFilePath, FileMode.Create, FileAccess.Write, FileShare.Read, 4096, FileOptions.WriteThrough))
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using (StreamWriter streamWriter = new StreamWriter(fileStream))
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using (JsonTextWriter jsonWriter = new JsonTextWriter(streamWriter))
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{
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JsonSerializer serializer = new JsonSerializer();
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if (SupportDPAPIEncryption)
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{
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serializer.ContractResolver = new DPAPIEncryptedStringPropertyResolver();
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}
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else
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{
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serializer.ContractResolver = new WritablePropertiesOnlyResolver();
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}
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serializer.Converters.Add(new StringEnumConverter());
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serializer.DateTimeZoneHandling = DateTimeZoneHandling.Utc;
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serializer.Formatting = Formatting.Indented;
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serializer.Serialize(jsonWriter, this);
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jsonWriter.Flush();
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}
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if (!JsonHelpers.QuickVerifyJsonFile(tempFilePath))
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{
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throw new Exception($"{typeName} file is corrupt: {tempFilePath}");
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}
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if (File.Exists(filePath))
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{
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string backupFilePath = null;
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if (CreateBackup)
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{
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string fileName = Path.GetFileName(filePath);
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backupFilePath = Path.Combine(BackupFolder, fileName);
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Helpers.CreateDirectoryFromDirectoryPath(BackupFolder);
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}
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File.Replace(tempFilePath, filePath, backupFilePath);
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}
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else
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{
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File.Move(tempFilePath, filePath);
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}
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if (CreateWeeklyBackup && !string.IsNullOrEmpty(BackupFolder))
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{
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Helpers.BackupFileWeekly(filePath, BackupFolder);
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}
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isSuccess = true;
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}
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}
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}
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catch (Exception e)
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{
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DebugHelper.WriteException(e);
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OnSettingsSaveFailed(e);
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}
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finally
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{
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string status = isSuccess ? "successful" : "failed";
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DebugHelper.WriteLine($"{typeName} save {status}: {filePath}");
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}
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return isSuccess;
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}
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public static T Load(string filePath, string backupFolder = null)
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{
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List<string> fallbackFilePaths = new List<string>();
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string tempFilePath = filePath + ".temp";
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fallbackFilePaths.Add(tempFilePath);
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if (!string.IsNullOrEmpty(backupFolder) && Directory.Exists(backupFolder))
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{
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string fileName = Path.GetFileName(filePath);
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string backupFilePath = Path.Combine(backupFolder, fileName);
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fallbackFilePaths.Add(backupFilePath);
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string fileNameNoExt = Path.GetFileNameWithoutExtension(fileName);
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string lastWeeklyBackupFilePath = Directory.GetFiles(backupFolder, fileNameNoExt + "-*").OrderBy(x => x).LastOrDefault();
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if (!string.IsNullOrEmpty(lastWeeklyBackupFilePath))
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{
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fallbackFilePaths.Add(lastWeeklyBackupFilePath);
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}
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}
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T setting = LoadInternal(filePath, fallbackFilePaths);
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if (setting != null)
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{
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setting.FilePath = filePath;
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setting.IsFirstTimeRun = string.IsNullOrEmpty(setting.ApplicationVersion);
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setting.IsUpgrade = !setting.IsFirstTimeRun && Helpers.CompareApplicationVersion(setting.ApplicationVersion) < 0;
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setting.BackupFolder = backupFolder;
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}
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return setting;
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}
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private static T LoadInternal(string filePath, List<string> fallbackFilePaths = null)
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{
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string typeName = typeof(T).Name;
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if (!string.IsNullOrEmpty(filePath) && File.Exists(filePath))
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{
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DebugHelper.WriteLine($"{typeName} load started: {filePath}");
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try
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{
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using (FileStream fileStream = new FileStream(filePath, FileMode.Open, FileAccess.Read, FileShare.Read))
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{
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if (fileStream.Length > 0)
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{
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T settings;
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using (StreamReader streamReader = new StreamReader(fileStream))
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using (JsonTextReader jsonReader = new JsonTextReader(streamReader))
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{
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JsonSerializer serializer = new JsonSerializer();
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serializer.ContractResolver = new DPAPIEncryptedStringPropertyResolver();
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serializer.Converters.Add(new StringEnumConverter());
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serializer.DateTimeZoneHandling = DateTimeZoneHandling.Local;
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serializer.ObjectCreationHandling = ObjectCreationHandling.Replace;
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serializer.Error += Serializer_Error;
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settings = serializer.Deserialize<T>(jsonReader);
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}
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if (settings == null)
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{
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throw new Exception($"{typeName} object is null.");
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}
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DebugHelper.WriteLine($"{typeName} load finished: {filePath}");
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return settings;
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}
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else
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{
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throw new Exception($"{typeName} file stream length is 0.");
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}
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}
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}
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catch (Exception e)
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{
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DebugHelper.WriteException(e, $"{typeName} load failed: {filePath}");
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}
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}
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else
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{
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DebugHelper.WriteLine($"{typeName} file does not exist: {filePath}");
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}
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if (fallbackFilePaths != null && fallbackFilePaths.Count > 0)
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{
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filePath = fallbackFilePaths[0];
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fallbackFilePaths.RemoveAt(0);
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return LoadInternal(filePath, fallbackFilePaths);
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}
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DebugHelper.WriteLine($"Loading new {typeName} instance.");
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return new T();
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}
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private static void Serializer_Error(object sender, Newtonsoft.Json.Serialization.ErrorEventArgs e)
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{
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// Handle missing enum values
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if (e.ErrorContext.Error.Message.StartsWith("Error converting value"))
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{
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e.ErrorContext.Handled = true;
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}
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}
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}
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} |