add url mapping referrer

Oqtane.Client/Modules/Admin/UrlMappings/Index.razor

@@ -36,6 +36,7 @@ else
 					<th>@Localizer["Url"]</th>
 					<th>@Localizer["Requests"]</th>
 					<th>@Localizer["Requested"]</th>
+					<th>@Localizer["Referrer"]</th>
 				</Header>
 				<Row>
                     <td><ActionLink Action="Edit" Text="Edit" Parameters="@($"id=" + context.UrlMappingId.ToString())" ResourceKey="Edit" /></td>
@@ -49,7 +50,8 @@ else
 					</td>
 					<td>@context.Requests</td>
 					<td>@UtcToLocal(context.RequestedOn)</td>
-				</Row>
+                    <td>@context.Referrer</td>
+                </Row>
 			</Pager>
 		</TabPanel>
         <TabPanel Name="Settings" Heading="Settings" ResourceKey="Settings">

Oqtane.Server/Components/App.razor

@@ -294,8 +294,11 @@
 
     private void HandlePageNotFound(Site site, Page page, Route route)
     {
+        // referrer will only be set if the link originated externally
+        string referrer = (Context.Request.Headers[HeaderNames.Referer] != StringValues.Empty) ? Context.Request.Headers[HeaderNames.Referer] : "";
+
         // page not found - look for url mapping
-        var urlMapping = UrlMappingRepository.GetUrlMapping(site.SiteId, route.PagePath);
+        var urlMapping = UrlMappingRepository.GetUrlMapping(site.SiteId, route.PagePath, referrer);
         if (urlMapping != null && !string.IsNullOrEmpty(urlMapping.MappedUrl))
         {
             // redirect to mapped url

Oqtane.Server/Migrations/Tenant/10000203_AddUrlMappingReferrer.cs

@@ -0,0 +1,28 @@
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Oqtane.Databases.Interfaces;
+using Oqtane.Migrations.EntityBuilders;
+using Oqtane.Repository;
+
+namespace Oqtane.Migrations.Tenant
+{
+    [DbContext(typeof(TenantDBContext))]
+    [Migration("Tenant.10.00.02.03")]
+    public class AddUrlMappingReferrer : MultiDatabaseMigration
+    {
+        public AddUrlMappingReferrer(IDatabase database) : base(database)
+        {
+        }
+
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            var urlMappingEntityBuilder = new UrlMappingEntityBuilder(migrationBuilder, ActiveDatabase);
+            urlMappingEntityBuilder.AddStringColumn("Referrer", 2048);
+        }
+
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            // not implemented
+        }
+    }
+}

Oqtane.Server/Repository/UrlMappingRepository.cs

@@ -14,6 +14,7 @@ namespace Oqtane.Repository
         UrlMapping GetUrlMapping(int urlMappingId);
         UrlMapping GetUrlMapping(int urlMappingId, bool tracking);
         UrlMapping GetUrlMapping(int siteId, string url);
+        UrlMapping GetUrlMapping(int siteId, string url, string referrer);
         void DeleteUrlMapping(int urlMappingId);
         int DeleteUrlMappings(int siteId, int age);
     }
@@ -78,6 +79,11 @@ namespace Oqtane.Repository
         }
 
         public UrlMapping GetUrlMapping(int siteId, string url)
+        {
+            return GetUrlMapping(siteId, url, "");
+        }
+
+        public UrlMapping GetUrlMapping(int siteId, string url, string referrer)
         {
             using var db = _dbContextFactory.CreateDbContext();
             url = (url.StartsWith("/")) ? url.Substring(1) : url;
@@ -93,6 +99,7 @@ namespace Oqtane.Repository
                     urlMapping.Url = url;
                     urlMapping.MappedUrl = "";
                     urlMapping.Requests = 1;
+                    urlMapping.Referrer = referrer;
                     urlMapping.CreatedOn = DateTime.UtcNow;
                     urlMapping.RequestedOn = DateTime.UtcNow;
                     try
@@ -109,6 +116,10 @@ namespace Oqtane.Repository
             {
                 urlMapping.Requests += 1;
                 urlMapping.RequestedOn = DateTime.UtcNow;
+                if (!string.IsNullOrEmpty(referrer))
+                {
+                    urlMapping.Referrer = referrer;
+                }
                 urlMapping = UpdateUrlMapping(urlMapping);
             }
             return urlMapping;

Oqtane.Shared/Models/UrlMapping.cs

@@ -33,6 +33,11 @@ namespace Oqtane.Models
         /// </summary>
         public int Requests { get; set; }
 
+        /// <summary>
+        /// Last referrer to the Url (only set if linked to externally)
+        /// </summary>
+        public string Referrer { get; set; }
+
         /// <summary>
         /// Date when the url was first requested for the site
         /// </summary>