LogListControls: show levels from displayed logs

public/app/features/logs/components/panel/LogList.tsx

@@ -31,7 +31,7 @@ import { LogListContextProvider, LogListState, useLogListContext } from './LogLi
 import { LogListControls } from './LogListControls';
 import { LOG_LIST_SEARCH_HEIGHT, LogListSearch } from './LogListSearch';
 import { LogListSearchContextProvider, useLogListSearchContext } from './LogListSearchContext';
-import { preProcessLogs, LogListModel } from './processing';
+import { preProcessLogs, LogListModel, getLevelsFromLogs } from './processing';
 import { useKeyBindings } from './useKeyBindings';
 import { usePopoverMenu } from './usePopoverMenu';
 import { LogLineVirtualization, getLogLineSize, LogFieldDimension, ScrollToLogsEvent } from './virtualization';
@@ -410,6 +410,8 @@ const LogListComponent = ({
     [debouncedScrollToItem, filteredLogs]
   );
 
+  const logLevels = useMemo(() => getLevelsFromLogs(processedLogs), [processedLogs]);
+
   if (!containerElement || listHeight == null) {
     // Wait for container to be rendered
     return null;
@@ -417,7 +419,7 @@ const LogListComponent = ({
 
   return (
     <div className={styles.logListContainer}>
-      {showControls && <LogListControls eventBus={eventBus} />}
+      {showControls && <LogListControls logLevels={logLevels} eventBus={eventBus} />}
       {detailsMode === 'sidebar' && showDetails.length > 0 && (
         <LogLineDetails
           containerElement={containerElement}

public/app/features/logs/components/panel/LogListControls.tsx

@@ -220,7 +220,7 @@ export const LogListControls = ({ eventBus, logLevels = FILTER_LEVELS, visualisa
         ))}
       </Menu>
     ),
-    [filterLevels, onFilterLevelClick, styles.menuItemActive]
+    [filterLevels, logLevels, onFilterLevelClick, styles.menuItemActive]
   );
 
   const downloadMenu = useMemo(

public/app/features/logs/components/panel/processing.ts

@@ -326,3 +326,11 @@ function countNewLines(log: string, limit = Infinity) {
   }
   return count;
 }
+
+export function getLevelsFromLogs(logs: LogListModel[]) {
+  const levels = new Set<LogLevel>();
+  for (const log of logs) {
+    levels.add(log.logLevel);
+  }
+  return Array.from(levels).filter(level => level != null);
+}