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

@namespace Oqtane.Modules.Admin.Themes
@inherits ModuleBase
@inject NavigationManager NavigationManager
@inject IFileService FileService
@inject IThemeService ThemeService
@inject IPackageService PackageService
@inject IStringLocalizer<Add> Localizer

@if (_packages != null)
{
    <TabStrip>
        @if (_packages.Count > 0)
        {
            <TabPanel Name="Download" ResourceKey="Download">
                <ModuleMessage Type="MessageType.Info" Message="Download one or more themes from the list below. Once you are ready click Install to complete the installation."></ModuleMessage>
                <Pager Items="@_packages">
                    <Row>
                        <td>
                            <h3 style="display: inline;"><a href="@context.ProductUrl" target="_new">@context.Name</a></h3>&nbsp;&nbsp;by:&nbsp;&nbsp;<strong><a href="@context.OwnerUrl" target="new">@context.Owner</a></strong><br />
                            <strong>@context.Downloads.ToString("###,###,##0")</strong> downloads&nbsp;&nbsp;|&nbsp;&nbsp; released: <strong>@context.ReleaseDate.ToString("MMM dd, yyyy")</strong>&nbsp;&nbsp;|&nbsp;&nbsp;version: <strong>@context.Version</strong><br />
                            @(context.Description.Length > 400 ? (context.Description.Substring(0, 400) + "...") : context.Description)
                        </td>
                        <td style="vertical-align: middle;">
                            <button type="button" class="btn btn-primary" @onclick=@(async () => await DownloadTheme(context.PackageId, context.Version))>@Localizer["Download"]</button>
                        </td>
                    </Row>
                </Pager>
            </TabPanel>
        }
        <TabPanel Name="Upload" ResourceKey="Upload">
            <table class="table table-borderless">
                <tr>
                    <td>
                        <Label HelpText="Upload one or more theme packages. Once they are uploaded click Install to complete the installation." ResourceKey="Theme">Theme: </Label>
                    </td>
                    <td>
                        <FileManager Filter="nupkg" ShowFiles="false" Folder="Packages" UploadMultiple="@true" />
                    </td>
                </tr>
            </table>
        </TabPanel>
    </TabStrip>

    <button type="button" class="btn btn-success" @onclick="InstallThemes">@Localizer["Install"]</button>
    <NavLink class="btn btn-secondary" href="@NavigateUrl()">@Localizer["Cancel"]</NavLink>
}

@code {
    private List<Package> _packages;

    public override SecurityAccessLevel SecurityAccessLevel => SecurityAccessLevel.Host;

    protected override async Task OnInitializedAsync()
    {
        try
        {
            var themes = await ThemeService.GetThemesAsync();
            _packages = await PackageService.GetPackagesAsync("theme");

            foreach (Package package in _packages.ToArray())
            {
                if (themes.Exists(item => item.PackageName == package.PackageId))
                {
                    _packages.Remove(package);
                }
            }
        }
        catch (Exception ex)
        {
            await logger.LogError(ex, "Error Loading Packages {Error}", ex.Message);
            AddModuleMessage(Localizer["Error.Package.Load"], MessageType.Error);
        }
    }

    private async Task InstallThemes()
    {
        try
        {
            await ThemeService.InstallThemesAsync();
            AddModuleMessage(string.Format(Localizer["Success.Theme.Install"], NavigateUrl("admin/system")), MessageType.Success);
        }
        catch (Exception ex)
        {
            await logger.LogError(ex, "Error Installing Theme");
        }
    }

    private async Task DownloadTheme(string packageid, string version)
    {
        try
        {
            await PackageService.DownloadPackageAsync(packageid, version, "Packages");
            await logger.LogInformation("Theme {ThemeName} {Version} Downloaded Successfully", packageid, version);
            AddModuleMessage(Localizer["Success.Theme.Download"], MessageType.Success);
            StateHasChanged();
        }
        catch (Exception ex)
        {
            await logger.LogError(ex, "Error Downloading Module {ThemeName} {Version}", packageid, version);
            AddModuleMessage(Localizer["Error.Theme.Download"], MessageType.Error);
        }
    }
}