Log entry editor to use service provider level values

Author: georgweiss

app/logbook/olog/client-es/src/main/java/org/phoebus/olog/es/api/OlogHttpClient.java

@@ -49,6 +49,7 @@
 import java.util.List;
 import java.util.Map;
 import java.util.ServiceLoader;
+import java.util.Set;
 import java.util.logging.Level;
 import java.util.logging.Logger;
 
@@ -548,4 +549,22 @@ public LogTemplate saveTemplate(LogTemplate template) throws LogbookException {
             throw new LogbookException(e);
         }
     }
+
+    @Override
+    public Collection<org.phoebus.logbook.Level> getLevels(){
+        HttpRequest request = HttpRequest.newBuilder()
+                .uri(URI.create(Preferences.olog_url + "/levels"))
+                .GET()
+                .build();
+
+        try {
+            HttpResponse<String> response = httpClient.send(request, HttpResponse.BodyHandlers.ofString());
+            return OlogObjectMappers.logEntryDeserializer.readValue(
+                    response.body(), new TypeReference<Set<org.phoebus.logbook.Level>>() {
+                    });
+        } catch (Exception e) {
+            LOGGER.log(Level.WARNING, "Unable to get templates from service", e);
+            return Collections.emptySet();
+        }
+    }
 }

app/logbook/olog/ui/src/main/java/org/phoebus/logbook/olog/ui/write/LogEntryEditorController.java

@@ -341,16 +341,9 @@ public void initialize() {
         }
 
         levelLabel.setText(LogbookUIPreferences.level_field_name);
-        // Sites may wish to define a different meaning and name for the "level" field.
-        String[] levelList = org.phoebus.olog.es.api.Preferences.levels;
-        availableLevels.addAll(Arrays.asList(levelList));
         levelSelector.setItems(availableLevels);
-        selectedLevelProperty.set(logEntry.getLevel() != null ? logEntry.getLevel() : availableLevels.get(0));
-
-        levelSelector.getSelectionModel().select(selectedLevelProperty.get());
         dateField.setText(TimestampFormats.DATE_FORMAT.format(Instant.now()));
 
-
         titleField.textProperty().bindBidirectional(titleProperty);
         titleProperty.addListener((changeListener, oldVal, newVal) ->
         {
@@ -830,6 +823,17 @@ private void getServerSideStaticData() {
             }
 
             templatesProperty.setAll(logClient.getTemplates().stream().toList());
+
+            Collection<org.phoebus.logbook.Level> levels = logClient.getLevels();
+            availableLevels.setAll(levels.stream().map(org.phoebus.logbook.Level::name).sorted().toList());
+            Optional<org.phoebus.logbook.Level> optionalLevel = levels.stream().filter(org.phoebus.logbook.Level::defaultLevel).findFirst();
+            String defaultLevel = null;
+            if(optionalLevel.isPresent()){
+                // One level value should be the default level
+               defaultLevel = optionalLevel.get().name();
+            }
+            selectedLevelProperty.set(logEntry.getLevel() != null ? logEntry.getLevel() : defaultLevel);
+            levelSelector.getSelectionModel().select(selectedLevelProperty.get());
         });
     }
 

core/logbook/src/main/java/org/phoebus/logbook/Level.java

@@ -0,0 +1,15 @@
+/*
+ * Copyright (C) 2025 European Spallation Source ERIC.
+ */
+
+package org.phoebus.logbook;
+
+/**
+ * Encapsulates "level" data managed on the server side.
+ * @param name The name, presented in UI and contained on a log entry
+ * @param defaultLevel Indicates if the instantiated object is the
+ *                     default level. Server will ensure only one single
+ *                     level is maintained as the default level.
+ */
+public record Level(String name, boolean defaultLevel) {
+}

core/logbook/src/main/java/org/phoebus/logbook/LogClient.java

@@ -6,6 +6,7 @@
 import java.util.Collections;
 import java.util.List;
 import java.util.Map;
+import java.util.Set;
 
 /**
  * @author Eric Berryman taken from shroffk
@@ -529,4 +530,8 @@ default Collection<LogTemplate> getTemplates(){
     default LogTemplate saveTemplate(LogTemplate logTemplate) throws LogbookException{
         return null;
     }
+
+    default Collection<Level> getLevels(){
+        return Collections.emptySet();
+    }
 }