Add expire time in log flag status response

bubble-server/src/main/java/bubble/resources/cloud/LogsResource.java

@@ -14,6 +14,7 @@ import javax.annotation.Nullable;
 import javax.ws.rs.*;
 import javax.ws.rs.core.Context;
 import javax.ws.rs.core.Response;
+import java.util.HashMap;
 import java.util.Optional;
 import java.util.concurrent.TimeUnit;
 
@@ -36,7 +37,10 @@ public class LogsResource {
 
     @GET @Path(EP_STATUS)
     @NonNull public Response getLoggingStatus(@NonNull @Context final ContainerRequest ctx) {
-        return ok(selfNodeService.getLogFlag());
+        final var flag = new HashMap<String, Object>(2);
+        flag.put("flag", selfNodeService.getLogFlag());
+        flag.put("expireAt", selfNodeService.getLogFlagExpirationTime().orElse(null));
+        return ok(flag);
     }
 
     @POST @Path(EP_START)

bubble-server/src/main/java/bubble/service/boot/SelfNodeService.java

@@ -28,5 +28,12 @@ public interface SelfNodeService {
     BubblePlan getThisPlan();
 
     boolean getLogFlag();
+
+    /**
+     * @return Empty if TTL for log flag is a special one (less than 0), else timestamp (milliseconds) when log flag
+     *         will be expired (to be precise, a very close time after the real expiration time as some time is spent
+     *         for processing here).
+     */
+    @NonNull Optional<Long> getLogFlagExpirationTime();
     void setLogFlag(final boolean logFlag, @NonNull final Optional<Integer> ttlInSeconds);
 }

bubble-server/src/main/java/bubble/service/boot/StandardSelfNodeService.java

@@ -447,6 +447,12 @@ public class StandardSelfNodeService implements SelfNodeService {
         return empty(flagStr) ? false : Boolean.valueOf(flagStr);
     }
 
+    @Override
+    @NonNull public Optional<Long> getLogFlagExpirationTime() {
+        var ttl = getNodeConfig().get_ttl(REDIS_LOG_FLAG_KEY);
+        return ttl < 0 ? Optional.empty() : Optional.of(now() + ttl * 1000);
+    }
+
     @Override
     public void setLogFlag(final boolean logFlag, @NonNull final Optional<Integer> ttlInSeconds) {
         if (logFlag) {

bubble-server/src/main/java/bubble/service_dbfilter/DbFilterSelfNodeService.java

@@ -33,6 +33,9 @@ public class DbFilterSelfNodeService implements SelfNodeService {
     @Override public BubblePlan getThisPlan() { return notSupported("getThisPlan"); }
 
     @Override public boolean getLogFlag() { return notSupported("getLogFlag"); }
+    @Override @NonNull public Optional<Long> getLogFlagExpirationTime() {
+        return notSupported("getLogFlagExpirationTime");
+    }
     @Override public void setLogFlag(boolean logFlag, @NonNull final Optional<Integer> ttlInSeconds) {
         notSupported("setLogFlag");
     }