Additional Presets (#1538)

* Additional Presets

# Conflicts:
#	base/src/main/java/io/quarkus/code/rest/CodeQuarkusResource.java

* make custom presets optional; choose to use default presets or nor

Author: vsevel

base/src/main/java/io/quarkus/code/config/CodeQuarkusConfig.java

@@ -1,8 +1,10 @@
 package io.quarkus.code.config;
 
+import java.util.List;
 import java.util.Optional;
 
 import io.smallrye.config.ConfigMapping;
+import io.smallrye.config.WithDefault;
 
 @ConfigMapping(prefix = "io.quarkus.code")
 public interface CodeQuarkusConfig {
@@ -20,4 +22,10 @@ public interface CodeQuarkusConfig {
     Optional<String> hostname();
 
     UIConfig ui();
+
+    Optional<List<PresetConfig>> customPresets();
+
+    @WithDefault(value = "true")
+    boolean useDefaultPresets();
+
 }

base/src/main/java/io/quarkus/code/config/PresetConfig.java

@@ -0,0 +1,14 @@
+package io.quarkus.code.config;
+
+import java.util.List;
+
+public interface PresetConfig {
+
+    String key();
+
+    String title();
+
+    String icon();
+
+    List<String> extensions();
+}

base/src/main/java/io/quarkus/code/rest/CodeQuarkusResource.java

@@ -28,6 +28,7 @@
 import java.nio.charset.StandardCharsets;
 import java.time.format.DateTimeFormatter;
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.List;
 import java.util.Map;
 import java.util.logging.Logger;
@@ -39,6 +40,7 @@
 import jakarta.ws.rs.core.MediaType;
 import jakarta.ws.rs.core.Response;
 
+import static java.util.Collections.emptyList;
 import static java.util.function.Predicate.not;
 
 @Path("/")
@@ -173,7 +175,7 @@ public Uni<Response> presetsForStream(
 
     private Uni<Response> presets(Map<String, ExtensionRef> extensionsById) {
         String lastUpdated = platformService.cacheLastUpdated().format(FORMATTER);
-        final List<Preset> presets = platformService.presets().stream()
+        final List<Preset> presets = getAllPresets().stream()
                 .filter(p -> p.extensions().stream().allMatch(extensionsById::containsKey))
                 .toList();
         Response response = Response.ok(presets)
@@ -182,6 +184,17 @@ private Uni<Response> presets(Map<String, ExtensionRef> extensionsById) {
         return Uni.createFrom().item(response);
     }
 
+    List<Preset> getAllPresets() {
+
+        List<Preset> presets = new ArrayList<>(config.useDefaultPresets() ? platformService.presets() : emptyList());
+
+        config.customPresets().ifPresent(customConfigs -> customConfigs.stream()
+                .map(pc -> new Preset(pc.key(), pc.title(), pc.icon(), pc.extensions()))
+                .forEach(presets::add));
+
+        return presets;
+    }
+
     private Uni<Response> extensions(
             boolean platformOnly,
             List<CodeQuarkusExtension> extensions,