feature(FUSETOOLS2-1417): Completion for Twitter lang values (ISO_639-1)

src/main/java/com/github/cameltooling/lsp/internal/completion/CamelOptionValuesCompletionsFuture.java

@@ -17,8 +17,10 @@
 package com.github.cameltooling.lsp.internal.completion;
 
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.Collections;
 import java.util.List;
+import java.util.Locale;
 import java.util.Optional;
 import java.util.function.Function;
 import java.util.stream.Collectors;
@@ -76,6 +78,16 @@ public List<CompletionItem> apply(CamelCatalog camelCatalog) {
 				} catch (ApiException e) {
 					LOGGER.error("Error while trying to provide completion for Kubernetes connected mode", e);
 				}
+			} else if("lang".equalsIgnoreCase(endpointOptionModel.getName())
+					&& optionParamValueURIInstance.getComponentName().startsWith("twitter-")) {
+				List<CompletionItem> items = new ArrayList<>();
+				//We will just rely on Java to be updated for this
+				for(String lang : Locale.getISOLanguages()) {
+					CompletionItem langItem = new CompletionItem(lang);
+					CompletionResolverUtils.applyTextEditToCompletionItem(optionParamValueURIInstance, langItem);
+					items.add(langItem);
+				}
+				return items;
 			}
 		}
 		return Collections.emptyList();

src/test/java/com/github/cameltooling/lsp/internal/completion/TwitterTimelineCompletionTest.java

@@ -0,0 +1,48 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ * <p>
+ * https://www.apache.org/licenses/LICENSE-2.0
+ * <p>
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.github.cameltooling.lsp.internal.completion;
+
+import com.github.cameltooling.lsp.internal.AbstractCamelLanguageServerTest;
+import com.github.cameltooling.lsp.internal.CamelLanguageServer;
+import org.eclipse.lsp4j.CompletionItem;
+import org.eclipse.lsp4j.Position;
+import org.junit.jupiter.api.Test;
+
+import java.util.List;
+import java.util.Locale;
+
+import static com.github.cameltooling.lsp.internal.util.RouteTextBuilder.createXMLBlueprintRoute;
+import static org.assertj.core.api.Assertions.assertThat;
+
+class TwitterTimelineCompletionTest extends AbstractCamelLanguageServerTest {
+
+    @Test
+    void testTwitterTimelineCompletionForLang() throws Exception {
+        CamelLanguageServer languageServer =
+                initializeLanguageServer(createXMLBlueprintRoute("twitter-timeline:HOME?lang="), ".xml");
+		List<CompletionItem> completions =
+                getCompletionFor(languageServer, new Position(0, 38)).get().getLeft();
+
+        // It should return the full list of ISO_639-1
+        // which is the two-letter codes for languages
+		assertThat(completions)
+				.isNotEmpty()
+                //We will just rely on Java to be updated for this
+                .hasSize(Locale.getISOLanguages().length)
+                .allMatch(item -> item.getLabel().length() == 2);
+    }
+}