oqtane.framework/Oqtane.Client/Modules/Admin/Languages/Add.razor

@namespace Oqtane.Modules.Admin.Languages
@inherits ModuleBase
@using System.Globalization
@using Microsoft.AspNetCore.Localization
@inject NavigationManager NavigationManager
@inject ILocalizationService LocalizationService
@inject ILanguageService LanguageService
@inject IPackageService PackageService
@inject IStringLocalizer<Add> Localizer
@inject IStringLocalizer<SharedResources> SharedLocalizer

@if (_cultures == null)
{
    <p><em>@SharedLocalizer["Loading"]</em></p>
}
else
{
    <TabStrip>
        <TabPanel Name="Manage" ResourceKey="Manage" Heading="Manage">
            <form @ref="form" class="@(validated ? "was-validated" : "needs-validation")" novalidate>
                <div class="container">
					<div class="row mb-1 align-items-center">
                        <Label Class="col-sm-3" For="name" HelpText="Name Of The Language" ResourceKey="Name">Name:</Label>
                        <div class="col-sm-9">
                            <select id="_code" class="form-select" @bind="@_code" required>
								<option value="-">&lt;@SharedLocalizer["Not Specified"]&gt;</option>
								@foreach (var culture in _cultures)
                                {
                                    <option value="@culture.Name">@(culture.DisplayName + " (" + culture.Name + ")")</option>
                                }
                            </select>
                        </div>
                    </div>
                    <div class="row mb-1 align-items-center">
                        <Label Class="col-sm-3" For="default" HelpText="Indicates Whether Or Not This Language Is The Default For The Site" ResourceKey="IsDefault">Default?</Label>
                        <div class="col-sm-9">
                            <select id="default" class="form-select" @bind="@_default" required>
                                <option value="True">@SharedLocalizer["Yes"]</option>
                                <option value="False">@SharedLocalizer["No"]</option>
                            </select>
                        </div>
                    </div>
                </div>
                <button type="button" class="btn btn-success" @onclick="SaveLanguage">@SharedLocalizer["Save"]</button>
				<NavLink class="btn btn-secondary" href="@NavigateUrl()">@SharedLocalizer["Cancel"]</NavLink>
            </form>
        </TabPanel>
        <TabPanel Name="Upload" ResourceKey="Upload" Security="SecurityAccessLevel.Host" Heading="Upload">
            <div class="container">
                <div class="row mb-1 align-items-center">
                    <Label Class="col-sm-3" HelpText="Upload one or more translations. Once they are uploaded click Install." ResourceKey="LanguageUpload">Translation: </Label>
                    <div class="col-sm-9">
                        <FileManager Folder="@Constants.PackagesFolder" UploadMultiple="true" OnUpload="OnUpload" />
                    </div>
                </div>
            </div>
            <NavLink class="btn btn-secondary" href="@NavigateUrl()">@SharedLocalizer["Cancel"]</NavLink>
        </TabPanel>
    </TabStrip>
}

@code {
	private ElementReference form;
	private bool validated = false;

	private string _code = "-";
	private string _default = "False";
	private List<string> _languages;
	private IEnumerable<Culture> _cultures;

	public override SecurityAccessLevel SecurityAccessLevel => SecurityAccessLevel.Admin;

	protected override async Task OnParametersSetAsync()
	{
		var languages = await LanguageService.GetLanguagesAsync(PageState.Site.SiteId);
		_languages = languages.Select(l => l.Code).ToList();

		await LoadCultures();
	}

	private async Task LoadCultures()
	{
		_cultures = await LocalizationService.GetCulturesAsync(false);
		_cultures = _cultures.Where(c => !c.Name.Equals(Constants.DefaultCulture) && !_languages.Contains(c.Name));
		_code = "-";
	}

	private async Task SaveLanguage()
	{
		validated = true;
		var interop = new Interop(JSRuntime);
		if (await interop.FormValid(form) && _code != "-")
		{
			var language = new Language
				{
					SiteId = PageState.Page.SiteId,
					Code = _code,
					IsDefault = (_default == null ? false : Boolean.Parse(_default))
				};

			try
			{
				language = await LanguageService.AddLanguageAsync(language);

				if (language.IsDefault)
				{
					await SetCultureAsync(language.Code);
				}

				await logger.LogInformation("Language Added {Language}", language);

				NavigationManager.NavigateTo(NavigateUrl());
			}
			catch (Exception ex)
			{
				await logger.LogError(ex, "Error Adding Language {Language} {Error}", language, ex.Message);
				AddModuleMessage(Localizer["Error.Language.Add"], MessageType.Error);
			}
		}
		else
		{
			AddModuleMessage(SharedLocalizer["Message.InfoRequired"], MessageType.Warning);
		}
	}

    private async Task SetCultureAsync(string culture)
    {
        if (culture != CultureInfo.CurrentUICulture.Name)
        {
            var interop = new Interop(JSRuntime);
            var localizationCookieValue = CookieRequestCultureProvider.MakeCookieValue(new RequestCulture(culture));
            await interop.SetCookie(CookieRequestCultureProvider.DefaultCookieName, localizationCookieValue, 360, true, "Lax");
        }
    }

    private void OnUpload()
    {
        AddModuleMessage(string.Format(Localizer["Success.Language.Download"], NavigateUrl("admin/system")), MessageType.Success);
    }
}