fix: incorrect unsubscribe link for email notification (#4695)

#### What type of PR is this?
/kind bug
/area core
/milestone 2.10.x

#### What this PR does / why we need it:
修复邮件通知中取消订阅链接不正确的问题

#### Does this PR introduce a user-facing change?
```release-note
修复邮件通知中取消订阅链接不正确的问题
```

application/src/main/java/run/halo/app/notification/DefaultNotificationCenter.java

@@ -5,7 +5,6 @@ import static org.apache.commons.lang3.StringUtils.defaultString;
 import java.util.HashMap;
 import java.util.HashSet;
 import java.util.Locale;
-import java.util.Map;
 import java.util.Optional;
 import java.util.function.BiPredicate;
 import java.util.function.Function;
@@ -135,6 +134,7 @@ public class DefaultNotificationCenter implements NotificationCenter {
                 .subscription(subscription)
                 .reasonType(notificationContent.reasonType())
                 .notificationTitle(notificationContent.title())
+                .reasonAttributes(notificationContent.reasonAttributes())
                 .notificationRawBody(defaultString(notificationContent.rawBody()))
                 .notificationHtmlBody(defaultString(notificationContent.htmlBody()))
                 .build()
@@ -180,12 +180,13 @@ public class DefaultNotificationCenter implements NotificationCenter {
             });
     }
 
-    @Builder
-    record NotificationElement(ReasonType reasonType, Reason reason,
-                               Subscription subscription, NotifierDescriptor descriptor,
-                               String notificationTitle,
-                               String notificationRawBody,
-                               String notificationHtmlBody) {
+    private ReasonAttributes toReasonAttributes(Reason reason) {
+        var model = new ReasonAttributes();
+        var attributes = reason.getSpec().getAttributes();
+        if (attributes != null) {
+            model.putAll(attributes);
+        }
+        return model;
     }
 
     Mono<NotificationContext> notificationContextFrom(NotificationElement element) {
@@ -198,7 +199,7 @@ public class DefaultNotificationCenter implements NotificationCenter {
         messagePayload.setTitle(element.notificationTitle());
         messagePayload.setRawBody(element.notificationRawBody());
         messagePayload.setHtmlBody(element.notificationHtmlBody());
-        messagePayload.setAttributes(reason.getSpec().getAttributes());
+        messagePayload.setAttributes(element.reasonAttributes());
 
         var message = new NotificationContext.Message();
         message.setRecipient(subscription.getSpec().getSubscriber().getName());
@@ -239,11 +240,6 @@ public class DefaultNotificationCenter implements NotificationCenter {
             });
     }
 
-    @Builder
-    record NotificationContent(String title, String rawBody, String htmlBody, ReasonType reasonType,
-                               Map<String, Object> reasonProperties) {
-    }
-
     Mono<NotificationContent> inferenceTemplate(Reason reason, Subscription subscription,
         Locale locale) {
         var reasonTypeName = reason.getSpec().getReasonType();
@@ -252,7 +248,7 @@ public class DefaultNotificationCenter implements NotificationCenter {
             .flatMap(reasonType -> notificationTemplateSelector.select(reasonTypeName, locale)
                 .flatMap(template -> {
                     final var templateContent = template.getSpec().getTemplate();
-                    Map<String, Object> model = toReasonAttributes(reason);
+                    var model = toReasonAttributes(reason);
                     var identity = UserIdentity.of(subscriber.getName());
                     var subscriberInfo = new HashMap<>();
                     if (identity.isAnonymous()) {
@@ -266,7 +262,7 @@ public class DefaultNotificationCenter implements NotificationCenter {
 
                     var builder = NotificationContent.builder()
                         .reasonType(reasonType)
-                        .reasonProperties(model);
+                        .reasonAttributes(model);
 
                     var titleMono = notificationTemplateRender
                         .render(templateContent.getTitle(), model)
@@ -285,17 +281,22 @@ public class DefaultNotificationCenter implements NotificationCenter {
             );
     }
 
+    @Builder
+    record NotificationContent(String title, String rawBody, String htmlBody, ReasonType reasonType,
+                               ReasonAttributes reasonAttributes) {
+    }
+
     String getUnsubscribeUrl(Subscription subscription) {
         return subscriptionRouter.getUnsubscribeUrl(subscription);
     }
 
-    private Map<String, Object> toReasonAttributes(Reason reason) {
-        Map<String, Object> model = new HashMap<>();
-        var attributes = reason.getSpec().getAttributes();
-        if (attributes != null) {
-            model.putAll(attributes);
-        }
-        return model;
+    @Builder
+    record NotificationElement(ReasonType reasonType, Reason reason,
+                               Subscription subscription, NotifierDescriptor descriptor,
+                               String notificationTitle,
+                               String notificationRawBody,
+                               String notificationHtmlBody,
+                               ReasonAttributes reasonAttributes) {
     }
 
     Mono<ReasonType> getReasonType(String reasonTypeName) {

application/src/main/java/run/halo/app/notification/EmailNotifier.java

@@ -145,12 +145,11 @@ public class EmailNotifier implements ReactiveNotifier {
 
     Mono<String> appendHtmlBodyFooter(ReasonAttributes attributes) {
         return notificationTemplateRender.render("""
-            ---
-            <div class="footer" style="font-size: 12px; color: #666">
+            <div class="footer" style="font-size: 12px; color: #666;">
             <a th:href="${site.url}" th:text="${site.title}"></a>
             <p class="unsubscribe">
             &mdash;<br />请勿直接回复此回邮件，
-            <a th:href="|${site.url}/console|">查看通知</a>
+            <a th:href="|${site.url}/console/users/-/notifications|">查看通知</a>
             或
             <a th:href="${unsubscribeUrl}">取消订阅</a>。
             </p>

application/src/main/java/run/halo/app/notification/endpoint/SubscriptionRouter.java

@@ -1,9 +1,11 @@
 package run.halo.app.notification.endpoint;
 
+import static org.apache.commons.lang3.ObjectUtils.defaultIfNull;
 import static org.springdoc.core.fn.builders.apiresponse.Builder.responseBuilder;
 import static org.springdoc.core.fn.builders.parameter.Builder.parameterBuilder;
 
 import io.swagger.v3.oas.annotations.enums.ParameterIn;
+import java.net.URI;
 import lombok.RequiredArgsConstructor;
 import org.apache.commons.lang3.StringUtils;
 import org.springdoc.webflux.core.fn.SpringdocRouteBuilder;
@@ -82,7 +84,8 @@ public class SubscriptionRouter {
     public String getUnsubscribeUrl(Subscription subscription) {
         var name = subscription.getMetadata().getName();
         var token = subscription.getSpec().getUnsubscribeToken();
-        return UriComponentsBuilder.fromUri(externalUrlSupplier.get())
+        var externalUrl = defaultIfNull(externalUrlSupplier.getRaw(), URI.create("/"));
+        return UriComponentsBuilder.fromUriString(externalUrl.toString())
             .path(UNSUBSCRIBE_PATTERN)
             .queryParam("token", token)
             .build(name)

application/src/test/java/run/halo/app/notification/endpoint/SubscriptionRouterTest.java

@@ -3,6 +3,7 @@ package run.halo.app.notification.endpoint;
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.mockito.Mockito.when;
 
+import java.net.MalformedURLException;
 import java.net.URI;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.extension.ExtendWith;
@@ -11,7 +12,6 @@ import org.mockito.Mock;
 import org.mockito.junit.jupiter.MockitoExtension;
 import run.halo.app.core.extension.notification.Subscription;
 import run.halo.app.extension.Metadata;
-import run.halo.app.extension.ReactiveExtensionClient;
 import run.halo.app.infra.ExternalUrlSupplier;
 
 /**
@@ -23,9 +23,6 @@ import run.halo.app.infra.ExternalUrlSupplier;
 @ExtendWith(MockitoExtension.class)
 class SubscriptionRouterTest {
 
-    @Mock
-    private ReactiveExtensionClient client;
-
     @Mock
     private ExternalUrlSupplier externalUrlSupplier;
 
@@ -33,8 +30,8 @@ class SubscriptionRouterTest {
     SubscriptionRouter subscriptionRouter;
 
     @Test
-    void getUnsubscribeUrlTest() {
-        when(externalUrlSupplier.get()).thenReturn(URI.create("https://halo.run"));
+    void getUnsubscribeUrlTest() throws MalformedURLException {
+        when(externalUrlSupplier.getRaw()).thenReturn(URI.create("https://halo.run").toURL());
         var subscription = new Subscription();
         subscription.setMetadata(new Metadata());
         subscription.getMetadata().setName("fake-subscription");
@@ -46,5 +43,4 @@ class SubscriptionRouterTest {
             + "/subscriptions/fake-subscription/unsubscribe"
             + "?token=fake-unsubscribe-token");
     }
-
-}
+}