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using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Routing;
using Nop.Core;
using Nop.Core.Infrastructure;
using Nop.Services.Localization;
namespace Nop.Web.Framework.Mvc.Routing;
/// <summary>
/// Represents class language parameter transformer
/// </summary>
public partial class LanguageParameterTransformer : IOutboundParameterTransformer
{
#region Fields
protected readonly IHttpContextAccessor _httpContextAccessor;
protected readonly ILanguageService _languageService;
#endregion
#region Ctor
public LanguageParameterTransformer(IHttpContextAccessor httpContextAccessor,
ILanguageService languageService)
{
_httpContextAccessor = httpContextAccessor;
_languageService = languageService;
}
#endregion
#region Methods
/// <summary>
/// Transforms the specified route value to a string for inclusion in a URI
/// </summary>
/// <param name="value">The route value to transform</param>
/// <returns>The transformed value</returns>
public string TransformOutbound(object value)
{
//first try to get a language code from the route values
var routeValues = _httpContextAccessor.HttpContext.Request.RouteValues;
if (routeValues.TryGetValue(NopRoutingDefaults.RouteValue.Language, out var routeValue))
{
//ensure this language is available
var code = routeValue?.ToString();
var storeContext = EngineContext.Current.Resolve<IStoreContext>();
var store = storeContext.GetCurrentStore();
var languages = _languageService.GetAllLanguages(storeId: store.Id);
var language = languages
.FirstOrDefault(lang => lang.Published && lang.UniqueSeoCode.Equals(code, StringComparison.InvariantCultureIgnoreCase));
if (language is not null)
return language.UniqueSeoCode.ToLowerInvariant();
}
//if there is no code in the route values, check whether the value is passed
if (value is null)
return string.Empty;
//or use the current language code
//we don't use the passed value, since it's always either the same as the current one or it's the default value (empty)
var workContext = EngineContext.Current.Resolve<IWorkContext>();
var currentLanguage = workContext.GetWorkingLanguageAsync().Result;
return currentLanguage.UniqueSeoCode.ToLowerInvariant();
}
#endregion
}