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SlugRouteTransformer.cs
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SlugRouteTransformer.cs
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using System;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc.Routing;
using Microsoft.AspNetCore.Routing;
using Nop.Core.Domain.Localization;
using Nop.Core.Events;
using Nop.Services.Localization;
using Nop.Services.Seo;
using Nop.Web.Framework.Events;
namespace Nop.Web.Framework.Mvc.Routing
{
/// <summary>
/// Represents slug route transformer
/// </summary>
public class SlugRouteTransformer : DynamicRouteValueTransformer
{
#region Fields
private readonly IEventPublisher _eventPublisher;
private readonly ILanguageService _languageService;
private readonly IUrlRecordService _urlRecordService;
private readonly LocalizationSettings _localizationSettings;
#endregion
#region Ctor
public SlugRouteTransformer(IEventPublisher eventPublisher,
ILanguageService languageService,
IUrlRecordService urlRecordService,
LocalizationSettings localizationSettings)
{
_eventPublisher = eventPublisher;
_languageService = languageService;
_urlRecordService = urlRecordService;
_localizationSettings = localizationSettings;
}
#endregion
#region Methods
public override async ValueTask<RouteValueDictionary> TransformAsync(HttpContext httpContext, RouteValueDictionary values)
{
if (values == null)
return values;
if (!values.TryGetValue("SeName", out var slugValue) || string.IsNullOrEmpty(slugValue as string))
return values;
var slug = slugValue as string;
var urlRecord = await _urlRecordService.GetBySlugAsync(slug);
//no URL record found
if (urlRecord == null)
return values;
//virtual directory path
var pathBase = httpContext.Request.PathBase;
//if URL record is not active let's find the latest one
if (!urlRecord.IsActive)
{
var activeSlug = await _urlRecordService.GetActiveSlugAsync(urlRecord.EntityId, urlRecord.EntityName, urlRecord.LanguageId);
if (string.IsNullOrEmpty(activeSlug))
return values;
//redirect to active slug if found
values[NopPathRouteDefaults.ControllerFieldKey] = "Common";
values[NopPathRouteDefaults.ActionFieldKey] = "InternalRedirect";
values[NopPathRouteDefaults.UrlFieldKey] = $"{pathBase}/{activeSlug}{httpContext.Request.QueryString}";
values[NopPathRouteDefaults.PermanentRedirectFieldKey] = true;
httpContext.Items["nop.RedirectFromGenericPathRoute"] = true;
return values;
}
//Ensure that the slug is the same for the current language,
//otherwise it can cause some issues when customers choose a new language but a slug stays the same
if (_localizationSettings.SeoFriendlyUrlsForLanguagesEnabled)
{
var urllanguage = values["language"];
if (urllanguage != null && !string.IsNullOrEmpty(urllanguage.ToString()))
{
var languages = await _languageService.GetAllLanguagesAsync();
var language = languages.FirstOrDefault(x => x.UniqueSeoCode.ToLowerInvariant() == urllanguage.ToString().ToLowerInvariant())
?? languages.FirstOrDefault();
var slugForCurrentLanguage = await _urlRecordService.GetActiveSlugAsync(urlRecord.EntityId, urlRecord.EntityName, language.Id);
if (!string.IsNullOrEmpty(slugForCurrentLanguage) && !slugForCurrentLanguage.Equals(slug, StringComparison.InvariantCultureIgnoreCase))
{
//we should make validation above because some entities does not have SeName for standard (Id = 0) language (e.g. news, blog posts)
//redirect to the page for current language
values[NopPathRouteDefaults.ControllerFieldKey] = "Common";
values[NopPathRouteDefaults.ActionFieldKey] = "InternalRedirect";
values[NopPathRouteDefaults.UrlFieldKey] = $"{pathBase}/{language.UniqueSeoCode}/{slugForCurrentLanguage}{httpContext.Request.QueryString}";
values[NopPathRouteDefaults.PermanentRedirectFieldKey] = false;
httpContext.Items["nop.RedirectFromGenericPathRoute"] = true;
return values;
}
}
}
//since we are here, all is ok with the slug, so process URL
switch (urlRecord.EntityName.ToLowerInvariant())
{
case "product":
values[NopPathRouteDefaults.ControllerFieldKey] = "Product";
values[NopPathRouteDefaults.ActionFieldKey] = "ProductDetails";
values[NopPathRouteDefaults.ProductIdFieldKey] = urlRecord.EntityId;
values[NopPathRouteDefaults.SeNameFieldKey] = urlRecord.Slug;
break;
case "producttag":
values[NopPathRouteDefaults.ControllerFieldKey] = "Catalog";
values[NopPathRouteDefaults.ActionFieldKey] = "ProductsByTag";
values[NopPathRouteDefaults.ProducttagIdFieldKey] = urlRecord.EntityId;
values[NopPathRouteDefaults.SeNameFieldKey] = urlRecord.Slug;
break;
case "category":
values[NopPathRouteDefaults.ControllerFieldKey] = "Catalog";
values[NopPathRouteDefaults.ActionFieldKey] = "Category";
values[NopPathRouteDefaults.CategoryIdFieldKey] = urlRecord.EntityId;
values[NopPathRouteDefaults.SeNameFieldKey] = urlRecord.Slug;
break;
case "manufacturer":
values[NopPathRouteDefaults.ControllerFieldKey] = "Catalog";
values[NopPathRouteDefaults.ActionFieldKey] = "Manufacturer";
values[NopPathRouteDefaults.ManufacturerIdFieldKey] = urlRecord.EntityId;
values[NopPathRouteDefaults.SeNameFieldKey] = urlRecord.Slug;
break;
case "vendor":
values[NopPathRouteDefaults.ControllerFieldKey] = "Catalog";
values[NopPathRouteDefaults.ActionFieldKey] = "Vendor";
values[NopPathRouteDefaults.VendorIdFieldKey] = urlRecord.EntityId;
values[NopPathRouteDefaults.SeNameFieldKey] = urlRecord.Slug;
break;
case "newsitem":
values[NopPathRouteDefaults.ControllerFieldKey] = "News";
values[NopPathRouteDefaults.ActionFieldKey] = "NewsItem";
values[NopPathRouteDefaults.NewsItemIdFieldKey] = urlRecord.EntityId;
values[NopPathRouteDefaults.SeNameFieldKey] = urlRecord.Slug;
break;
case "blogpost":
values[NopPathRouteDefaults.ControllerFieldKey] = "Blog";
values[NopPathRouteDefaults.ActionFieldKey] = "BlogPost";
values[NopPathRouteDefaults.BlogPostIdFieldKey] = urlRecord.EntityId;
values[NopPathRouteDefaults.SeNameFieldKey] = urlRecord.Slug;
break;
case "topic":
values[NopPathRouteDefaults.ControllerFieldKey] = "Topic";
values[NopPathRouteDefaults.ActionFieldKey] = "TopicDetails";
values[NopPathRouteDefaults.TopicIdFieldKey] = urlRecord.EntityId;
values[NopPathRouteDefaults.SeNameFieldKey] = urlRecord.Slug;
break;
default:
//no record found, thus generate an event this way developers could insert their own types
await _eventPublisher.PublishAsync(new GenericRoutingEvent(values, urlRecord));
break;
}
return values;
}
#endregion
}
}