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using System.Globalization;

using System.Runtime.CompilerServices;

using System.Text.Json;

using ControlR.Libraries.Branding;

namespace ControlR.DesktopClient.Common;

public static class Localization

{

private const string BrandNameToken = "{brand_name}";

private const string DefaultCulture = "en-US";

private const string LanguageDisplayNameKey = nameof(LanguageDisplayName);

private const string StringsResourceMarker = ".Resources.Strings.";

private const string StringsSuffix = ".json";

private static readonly JsonSerializerOptions _jsonOptions = new()

{

AllowTrailingCommas = true,

PropertyNameCaseInsensitive = true,

ReadCommentHandling = JsonCommentHandling.Skip

};

private static string _currentCulture = CultureInfo.CurrentCulture.Name;

private static Dictionary<string, string> _localizationStrings = GetLocalizationStrings(_currentCulture);

public static string About => GetString();

public static string AboutLibraryAvaloniaUi => GetString();

public static string AboutLibraryControlR => GetString();

public static string AboutLibraryMicrosoftLibraries => GetString();

public static string AboutLibrarySerilog => GetString();

public static string AboutLibraryTmdsDbus => GetString();

public static string AboutLicenseLabel => GetString();

public static string AboutProjectLabel => GetString();

public static string AboutSourceText => GetString();

public static string AboutSponsorButton => GetString();

public static string AboutSponsorDescription => GetString();

public static string AboutSponsorLabel => GetString();

public static string AboutThirdPartyLicensesDescription => GetString();

public static string AboutThirdPartyLicensesLabel => GetString();

public static string AboutWebsiteLabel => GetString();

public static string Accessibility => GetString();

public static string AccessibilityPermissionDescription => GetString();

public static string ActiveConnections => GetString();

public static string ADeviceAdministrator => GetString();

public static string AgentConnectedTooltip => GetString();

public static string AgentDisconnectedTooltip => GetString();

public static string AgentStatus => GetString();

public static string Auto => GetString();

public static string CancelText => GetString();

public static string ChatMessageSendFailureMessage => GetString();

public static string ChatMessageSendFailureTitle => GetString();

public static string ChatSessionClosedToastMessage => GetString();

public static string ChatSessionClosedToastTitle => GetString();

public static string ChatWindowClosedSystemMessage => GetString();

public static string ChatWindowDefaultTitle => GetString();

public static string ChatWindowTitle => GetString();

public static string CloseText => GetString();

public static string ConfirmDisconnect => GetString();

public static string ConfirmDisconnectTitle => GetString();

public static string Connected => GetString();

public static string ConnectedAtLabel => GetString();

public static string Connections => GetString();

public static string CouldNotCreateViewMessage => GetString();

public static string Dark => GetString();

public static string Disconnect => GetString();

public static string Disconnected => GetString();

public static string EnterCodePlaceholder => GetString();

public static string EnterMessagePlaceholder => GetString();

public static string GetSupportDescription => GetString();

public static string GetTechSupportTitle => GetString();

public static string Granted => GetString();

public static string GrantPermission => GetString();

public static string InstanceId => GetString();

public static string InvalidViewModelTypeMessage => GetString();

public static string Language => GetString();

public static string LanguageDisplayName => GetString();

public static string LanguageRestartNote => GetString();

public static string LearnMore => GetString();

public static string Light => GetString();

public static string LinkLicenseText => GetString();

public static string MacAccessibilityPermissionRestartRequired => GetString();

public static string MacPermissionStaleHint => GetString();

public static string MacScreenCapturePermissionRestartRequired => GetString();

public static string ManagedDeviceMessage => GetString();

public static string ManagedDeviceTitle => GetString();

public static string NewChatMessageToastMessage => GetString();

public static string NewChatMessageToastTitle => GetString();

public static string NoActiveConnections => GetString();

public static string NoMessagesText => GetString();

public static string None => GetString();

public static string NoPermissionsRequired => GetString();

public static string NoText => GetString();

public static string NotGranted => GetString();

public static string NotificationPermissionDescription => GetString();

public static string Notifications => GetString();

public static string OkText => GetString();

public static string OpenSettings => GetString();

public static string Permissions => GetString();

public static string PermissionsMissingToastMessage => GetString();

public static string PermissionsMissingToastTitle => GetString();

public static string RemoteControlPermission => GetString();

public static string RemoteControlPermissionDescription => GetString();

public static string RemoteControlRequestMessage => GetString();

public static string RemoteControlRequestTitle => GetString();

public static string RemoteControlSessionEndToastMessage => GetString();

public static string RemoteControlSessionStartToastMessage => GetString();

public static string RemoteControlSessionToastTitle => GetString();

public static string Restart => GetString();

public static string ScreenCapturePermissionDescription => GetString();

public static string ScreenCastPermission => GetString();

public static string ScreenCastPermissionDescription => GetString();

public static string ScreenRecording => GetString();

public static string SendMessageText => GetString();

public static string SendText => GetString();

public static string Settings => GetString();

public static string ShareScreenSecurityWarning => GetString();

public static string Status => GetString();

public static string SubmitText => GetString();

public static string Theme => GetString();

public static string TrayExit => GetString();

public static string TrayShow => GetString();

public static string UnhandledExceptionMessage => GetString();

public static string UnhandledExceptionTitle => GetString();

public static string Version => GetString();

public static string ViewNotFoundMessage => GetString();

public static string YesText => GetString();

public static string You => GetString();

/// <summary>

/// The embedded cultures, each labeled in its own language.

/// </summary>

public static IReadOnlyList<LocalizationLanguage> GetAvailableLanguages()

{

var assembly = typeof(Localization).Assembly;

return GetCultures(assembly.GetManifestResourceNames())

.Select(culture => new LocalizationLanguage(culture, GetLocalizationStrings(culture)[LanguageDisplayNameKey]))

.OrderBy(x => x.DisplayName)

.ToList();

}

public static void SetCulture(string culture)

{

_currentCulture = culture;

_localizationStrings = GetLocalizationStrings(_currentCulture);

}

// Manifest names come from RootNamespace, which stays the project name in a white-label build even

// though the assembly is renamed. Only the tail after the strings directory is dependable.

internal static List<string> GetCultures(IEnumerable<string> resourcePaths)

{

return resourcePaths

.Select(path => (path, markerIndex: path.IndexOf(StringsResourceMarker, StringComparison.Ordinal)))

.Where(x => x.markerIndex >= 0 && x.path.EndsWith(StringsSuffix, StringComparison.Ordinal))

.Select(x => x.path[(x.markerIndex + StringsResourceMarker.Length)..^StringsSuffix.Length])

.Where(culture => culture.Length > 0)

.ToList();

}

private static string? FindResourcePath(IEnumerable<string> resourcePaths, string culture)

{

// An empty culture name would match every strings file, so require an exact one.

if (string.IsNullOrEmpty(culture))

{

return null;

}

var suffix = $"{culture}{StringsSuffix}";

return resourcePaths.FirstOrDefault(x =>

x.EndsWith(suffix, StringComparison.Ordinal) &&

x.Contains(StringsResourceMarker, StringComparison.Ordinal));

}

private static Dictionary<string, string> GetLocalizationStrings(string culture)

{

var assembly = typeof(Localization).Assembly;

var resourcePaths = assembly.GetManifestResourceNames();

var fileName =

FindResourcePath(resourcePaths, culture)

?? FindResourcePath(resourcePaths, DefaultCulture)

?? throw new InvalidOperationException("Unable to find localization file.");

using var resourceStream = assembly.GetManifestResourceStream(fileName)

?? throw new InvalidOperationException("Unable to find localization file.");

using var reader = new StreamReader(resourceStream);

var content = reader.ReadToEnd();

var strings = JsonSerializer.Deserialize<Dictionary<string, string>>(content, _jsonOptions)

?? throw new InvalidOperationException("Unable to deserialize localization file.");

return strings.ToDictionary(x => x.Key, x => x.Value.Replace(BrandNameToken, BrandingConstants.BrandName));

}

private static string GetString([CallerMemberName] string key = "")

{

if (_localizationStrings.TryGetValue(key, out var value))

{

return value;

}

return $"Localization key '{key}' not found.";

}

}

public record LocalizationLanguage(string Culture, string DisplayName);