feat: add API to fetch system configs by group

application/src/main/java/run/halo/app/core/endpoint/SystemConfigEndpoint.java

@@ -0,0 +1,61 @@
+package run.halo.app.core.endpoint;
+
+import static org.springdoc.core.fn.builders.apiresponse.Builder.responseBuilder;
+import static org.springdoc.core.fn.builders.content.Builder.contentBuilder;
+import static org.springdoc.core.fn.builders.parameter.Builder.parameterBuilder;
+
+import com.fasterxml.jackson.databind.node.JsonNodeFactory;
+import com.fasterxml.jackson.databind.node.ObjectNode;
+import io.swagger.v3.oas.annotations.enums.ParameterIn;
+import lombok.RequiredArgsConstructor;
+import org.springdoc.webflux.core.fn.SpringdocRouteBuilder;
+import org.springframework.http.MediaType;
+import org.springframework.stereotype.Component;
+import org.springframework.web.reactive.function.server.RouterFunction;
+import org.springframework.web.reactive.function.server.ServerRequest;
+import org.springframework.web.reactive.function.server.ServerResponse;
+import reactor.core.publisher.Mono;
+import run.halo.app.core.extension.endpoint.CustomEndpoint;
+import run.halo.app.extension.GroupVersion;
+import run.halo.app.infra.SystemConfigurableEnvironmentFetcher;
+
+@Component
+@RequiredArgsConstructor
+public class SystemConfigEndpoint implements CustomEndpoint {
+    private final SystemConfigurableEnvironmentFetcher configurableEnvironmentFetcher;
+
+    @Override
+    public RouterFunction<ServerResponse> endpoint() {
+        final var tag = "SystemConfigV1alpha1Console";
+        return SpringdocRouteBuilder.route()
+            .GET("/systemconfigs/{group}", this::getConfigByGroup,
+                builder -> builder.operationId("getSystemConfigByGroup")
+                    .description("Get system config by group")
+                    .tag(tag)
+                    .response(responseBuilder()
+                        .content(contentBuilder()
+                            .mediaType(MediaType.APPLICATION_JSON_VALUE)
+                        )
+                        .implementation(ObjectNode.class))
+                    .parameter(parameterBuilder()
+                        .in(ParameterIn.PATH)
+                        .name("group")
+                        .required(true)
+                        .description("Group of the system config")
+                    )
+            )
+            .build();
+    }
+
+    private Mono<ServerResponse> getConfigByGroup(ServerRequest request) {
+        final var group = request.pathVariable("group");
+        return configurableEnvironmentFetcher.fetch(group, ObjectNode.class)
+            .switchIfEmpty(Mono.fromSupplier(JsonNodeFactory.instance::objectNode))
+            .flatMap(json -> ServerResponse.ok().bodyValue(json));
+    }
+
+    @Override
+    public GroupVersion groupVersion() {
+        return new GroupVersion("console.api.halo.run", "v1alpha1");
+    }
+}

application/src/main/resources/extensions/role-template-menu.yaml

@@ -30,3 +30,7 @@ rules:
   - apiGroups: [ "" ]
     resources: [ "menus", "menuitems" ]
     verbs: [ "get", "list" ]
+  - apiGroups: [ "console.api.halo.run" ]
+    resources: [ "systemconfigs" ]
+    resourceNames: [ "menu" ]
+    verbs: [ "get" ]