private SettingObject ReadSettingObject(Union <Exception, string> fileTextOrException)
{
SettingCopy workingCopy = TemplateSettings.CreateWorkingCopy();
fileTextOrException.Match(
whenOption1: exception => exception.Trace(),
whenOption2: fileText => workingCopy.TryLoadFromText(fileText));
return(workingCopy.Commit());
}
/// <summary>
/// Creates a <see cref="SettingsFile"/> given a valid file path.
/// The <see cref="LiveTextFile.FileUpdated"/> event is not raised until
/// the current synchronization context is captured explicitly.
/// </summary>
/// <param name="absoluteFilePath">
/// The absolute file path from which to load the settings file.
/// If the file does not exist, if access rights are insufficient,
/// or if the settings file is corrupt, an empty <see cref="SettingsFile"/>
/// object is returned.
/// </param>
/// <param name="workingCopy">
/// The <see cref="SettingCopy"/> in which the values are stored.
/// </param>
/// <returns>
/// The created <see cref="SettingsFile"/>.
/// </returns>
/// <exception cref="ArgumentException">
/// <paramref name="absoluteFilePath"/> is empty, contains only whitespace, or contains invalid characters
/// (see also <seealso cref="Path.GetInvalidPathChars"/>), or is in an invalid format,
/// or is a relative path and its absolute path could not be resolved.
/// </exception>
/// <exception cref="ArgumentNullException">
/// <paramref name="absoluteFilePath"/> and/or <paramref name="workingCopy"/> are null.
/// </exception>
/// <exception cref="IOException">
/// <paramref name="absoluteFilePath"/> is longer than its maximum length (this is OS specific).
/// </exception>
/// <exception cref="System.Security.SecurityException">
/// The caller does not have sufficient permissions to read the file.
/// </exception>
/// <exception cref="NotSupportedException">
/// <paramref name="absoluteFilePath"/> is in an invalid format.
/// </exception>
public static SettingsFile Create(string absoluteFilePath, SettingCopy workingCopy)
{
if (workingCopy == null)
{
throw new ArgumentNullException(nameof(workingCopy));
}
var settingsFile = new SettingsFile(absoluteFilePath, workingCopy.Commit());
settingsFile.Settings = settingsFile.ReadSettingObject(settingsFile.LoadedText);
return(settingsFile);
}
protected internal override bool ShouldSave(IReadOnlyList <SettingCopy> updates, out string textToSave)
{
SettingCopy latestUpdate = updates[updates.Count - 1];
if (!latestUpdate.EqualTo(RemoteSettings))
{
RemoteSettings = latestUpdate.Commit();
textToSave = CompactSettingWriter.ConvertToJson(RemoteSettings.Map);
return(true);
}
textToSave = default;
return(false);
}