Add AutoConfiguration for Inertia Filter

src/main/groovy/org/graceframework/plugins/inertia/InertiaAutoConfiguration.java

@@ -0,0 +1,48 @@
+/*
+ * Copyright 2024 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.graceframework.plugins.inertia;
+
+import javax.servlet.DispatcherType;
+
+import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnWebApplication;
+import org.springframework.boot.autoconfigure.web.servlet.ConditionalOnMissingFilterBean;
+import org.springframework.boot.web.servlet.FilterRegistrationBean;
+import org.springframework.boot.web.servlet.filter.OrderedFilter;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+/**
+ * {@link EnableAutoConfiguration Auto-configuration} for Inertia Plugin.
+ *
+ * @author Michael Yan
+ * @since 0.1
+ */
+@ConditionalOnWebApplication(type = ConditionalOnWebApplication.Type.SERVLET)
+@Configuration(proxyBeanMethods = false)
+public class InertiaAutoConfiguration {
+
+    @Bean
+    @ConditionalOnMissingFilterBean
+    public FilterRegistrationBean<InertiaRequestFilter> inertiaFilter() {
+        InertiaRequestFilter filter = new InertiaRequestFilter();
+        FilterRegistrationBean<InertiaRequestFilter> registration = new FilterRegistrationBean<>(filter);
+        registration.setDispatcherTypes(DispatcherType.REQUEST, DispatcherType.ASYNC);
+        registration.setOrder(OrderedFilter.REQUEST_WRAPPER_FILTER_MAX_ORDER + 100);
+        return registration;
+    }
+
+}

src/main/groovy/org/graceframework/plugins/inertia/InertiaMimeType.java

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+/*
+ * Copyright 2024 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.graceframework.plugins.inertia;
+
+import grails.web.mime.MimeType;
+
+/**
+ * {@link MimeType} for Inertia
+ *
+ * @author Michael Yan
+ * @since 0.1
+ */
+public class InertiaMimeType {
+
+    public static final String INERTIA_FORMAT = "inertia";
+
+    public static final MimeType INERTIA = new MimeType("application/json", "inertia");
+
+}

src/main/groovy/org/graceframework/plugins/inertia/InertiaRequestFilter.java

@@ -0,0 +1,56 @@
+/*
+ * Copyright 2024 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.graceframework.plugins.inertia;
+
+import java.io.IOException;
+import javax.servlet.FilterChain;
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+import org.springframework.web.filter.OncePerRequestFilter;
+
+import grails.web.http.HttpHeaders;
+import grails.web.mime.MimeType;
+import org.grails.web.util.GrailsApplicationAttributes;
+
+/**
+ * {@link OncePerRequestFilter} to check current request whether from Inertia or not,
+ * and will set attribute content and response format.
+ *
+ * @author Michael Yan
+ * @since 0.1
+ */
+public class InertiaRequestFilter extends OncePerRequestFilter {
+
+    @Override
+    protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain)
+            throws ServletException, IOException {
+
+        request.setAttribute(GrailsApplicationAttributes.CONTENT_FORMAT, InertiaMimeType.INERTIA_FORMAT);
+        request.setAttribute(GrailsApplicationAttributes.RESPONSE_FORMAT, InertiaMimeType.INERTIA_FORMAT);
+        request.setAttribute(GrailsApplicationAttributes.RESPONSE_MIME_TYPE, InertiaMimeType.INERTIA);
+
+        filterChain.doFilter(request, response);
+    }
+
+    @Override
+    protected boolean shouldNotFilter(HttpServletRequest request) {
+        return !(MimeType.ALL.getName().equals(request.getHeader(HttpHeaders.ACCEPT))
+                && Boolean.parseBoolean(request.getHeader(InertiaRequest.X_INERTIA)));
+    }
+
+}

src/main/resources/META-INF/spring.factories

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+# Auto Configure
+org.springframework.boot.autoconfigure.EnableAutoConfiguration=\
+org.graceframework.plugins.inertia.InertiaAutoConfiguration

src/main/resources/META-INF/spring/org.springframework.boot.autoconfigure.AutoConfiguration.imports

@@ -0,0 +1 @@
+org.graceframework.plugins.inertia.InertiaAutoConfiguration