Redirect to package after version deletion (#25594)

Related #25559

Current behaviour:
1. Deletion of a package version
2. Redirect to the owners package list

New behaviour:
1. Deletion of a package version
2.1. If there are more versions available, redirect to the package again
2.2. If there are no versions available, redirect to the owners package
list

routers/web/user/package.go

@@ -420,7 +420,13 @@ func PackageSettingsPost(ctx *context.Context) {
 			ctx.Flash.Success(ctx.Tr("packages.settings.delete.success"))
 		}
 
-		ctx.Redirect(ctx.Package.Owner.HomeLink() + "/-/packages")
+		redirectURL := ctx.Package.Owner.HomeLink() + "/-/packages"
+		// redirect to the package if there are still versions available
+		if has, _ := packages_model.ExistVersion(ctx, &packages_model.PackageSearchOptions{PackageID: ctx.Package.Descriptor.Package.ID}); has {
+			redirectURL = ctx.Package.Descriptor.PackageWebLink()
+		}
+
+		ctx.Redirect(redirectURL)
 		return
 	}
 }

templates/package/view.tmpl

@@ -84,7 +84,6 @@
 					{{end}}
 					</div>
 				{{end}}
-				{{if .LatestVersions}}
 				<div class="divider"></div>
 				<strong>{{.locale.Tr "packages.versions"}} ({{.TotalVersionCount}})</strong>
 				<a class="ui right" href="{{$.PackageDescriptor.PackageWebLink}}/versions">{{.locale.Tr "packages.versions.view_all"}}</a>
@@ -96,7 +95,6 @@
 					</div>
 				{{end}}
 				</div>
-				{{end}}
 				{{if or .CanWritePackages .HasRepositoryAccess}}
 					<div class="divider"></div>
 					<div class="ui relaxed list">