Preserve remember-me option after authentication failure (#6844)

#### What type of PR is this?

/kind bug
/area core
/milestone 2.20.x

#### What this PR does / why we need it:

This PR preserves `remember-me` option after authentication failure.

#### Which issue(s) this PR fixes:

Fixes https://github.com/halo-dev/halo/issues/6835

#### Special notes for your reviewer:

1. Go to login page
2. Input invalid username or password and select `remember-me` option
3. Click `Login` button
4. See the result

#### Does this PR introduce a user-facing change?

```release-note
修复登录失败后记住我选项被重置的问题
```

application/src/main/java/run/halo/app/security/authentication/rememberme/TokenBasedRememberMeServices.java

@@ -203,7 +203,7 @@ public class TokenBasedRememberMeServices implements ServerLogoutHandler, Rememb
     public Mono<Void> loginFail(ServerWebExchange exchange) {
         log.debug("Interactive login attempt was unsuccessful.");
         cancelCookie(exchange);
-        return Mono.empty();
+        return rememberMeRequestCache.saveRememberMe(exchange);
     }
 
     @Override

application/src/main/java/run/halo/app/security/authentication/rememberme/WebSessionRememberMeRequestCache.java

@@ -1,7 +1,5 @@
 package run.halo.app.security.authentication.rememberme;
 
-import static java.lang.Boolean.parseBoolean;
-
 import org.springframework.web.server.ServerWebExchange;
 import org.springframework.web.server.WebSession;
 import reactor.core.publisher.Mono;
@@ -23,9 +21,7 @@ public class WebSessionRememberMeRequestCache implements RememberMeRequestCache
     @Override
     public Mono<Void> saveRememberMe(ServerWebExchange exchange) {
         return resolveFromQuery(exchange)
-            .filter(Boolean::booleanValue)
             .switchIfEmpty(resolveFromForm(exchange))
-            .filter(Boolean::booleanValue)
             .flatMap(rememberMe -> exchange.getSession().doOnNext(
                 session -> session.getAttributes().put(SESSION_ATTRIBUTE_NAME, rememberMe))
             )
@@ -35,9 +31,7 @@ public class WebSessionRememberMeRequestCache implements RememberMeRequestCache
     @Override
     public Mono<Boolean> isRememberMe(ServerWebExchange exchange) {
         return resolveFromQuery(exchange)
-            .filter(Boolean::booleanValue)
             .switchIfEmpty(resolveFromForm(exchange))
-            .filter(Boolean::booleanValue)
             .switchIfEmpty(resolveFromSession(exchange))
             .defaultIfEmpty(false);
     }
@@ -50,22 +44,20 @@ public class WebSessionRememberMeRequestCache implements RememberMeRequestCache
     }
 
     private Mono<Boolean> resolveFromQuery(ServerWebExchange exchange) {
-        return Mono.just(
-            parseBoolean(exchange.getRequest().getQueryParams().getFirst(DEFAULT_PARAMETER))
-        );
+        return Mono.justOrEmpty(exchange.getRequest().getQueryParams().getFirst(DEFAULT_PARAMETER))
+            .map(Boolean::parseBoolean);
     }
 
     private Mono<Boolean> resolveFromForm(ServerWebExchange exchange) {
         return exchange.getFormData()
-            .map(form -> parseBoolean(form.getFirst(DEFAULT_PARAMETER)))
-            .filter(Boolean::booleanValue);
+            .mapNotNull(form -> form.getFirst(DEFAULT_PARAMETER))
+            .map(Boolean::parseBoolean);
     }
 
     private Mono<Boolean> resolveFromSession(ServerWebExchange exchange) {
         return exchange.getSession()
-            .map(session -> {
-                var rememberMeObject = session.getAttribute(SESSION_ATTRIBUTE_NAME);
-                return rememberMeObject instanceof Boolean rememberMe ? rememberMe : false;
-            });
+            .mapNotNull(session -> session.getAttribute(SESSION_ATTRIBUTE_NAME))
+            .filter(Boolean.class::isInstance)
+            .cast(Boolean.class);
     }
 }

application/src/main/java/run/halo/app/security/preauth/PreAuthLoginEndpoint.java

@@ -22,6 +22,8 @@ import run.halo.app.plugin.PluginConst;
 import run.halo.app.security.AuthProviderService;
 import run.halo.app.security.HaloServerRequestCache;
 import run.halo.app.security.authentication.CryptoService;
+import run.halo.app.security.authentication.rememberme.RememberMeRequestCache;
+import run.halo.app.security.authentication.rememberme.WebSessionRememberMeRequestCache;
 
 /**
  * Pre-auth login endpoints.
@@ -40,6 +42,9 @@ class PreAuthLoginEndpoint {
 
     private final ServerRequestCache serverRequestCache = new HaloServerRequestCache();
 
+    private final RememberMeRequestCache rememberMeRequestCache =
+        new WebSessionRememberMeRequestCache();
+
     PreAuthLoginEndpoint(CryptoService cryptoService, GlobalInfoService globalInfoService,
         AuthProviderService authProviderService) {
         this.cryptoService = cryptoService;
@@ -91,7 +96,8 @@ class PreAuthLoginEndpoint {
                         "authProvider", authProvider,
                         "fragmentTemplateName", fragmentTemplateName,
                         "socialAuthProviders", socialAuthProviders,
-                        "formAuthProviders", formAuthProviders
+                        "formAuthProviders", formAuthProviders,
+                        "rememberMe", rememberMeRequestCache.isRememberMe(exchange)
                         // TODO Add more models here
                     ))
                 ));

application/src/main/resources/templates/gateway_fragments/login.html

@@ -30,7 +30,7 @@
     <div th:replace="~{__${fragmentTemplateName}__::form}"></div>
 
     <div th:if="${authProvider.spec.rememberMeSupport}" class="form-item-compact">
-        <input type="checkbox" id="remember-me" name="remember-me" value="true" />
+        <input type="checkbox" id="remember-me" name="remember-me" value="true" th:checked="${rememberMe}"/>
         <label for="remember-me" th:text="#{form.rememberMe.label}"></label>
     </div>