[Backport 2.x] Add visualization tool

build.gradle

@@ -179,6 +179,14 @@ test {
     systemProperty 'tests.security.manager', 'false'
 }
 
+jacocoTestReport {
+    dependsOn test
+    reports {
+        html.required = true // human readable
+        xml.required = true // for coverlay
+    }
+}
+
 spotless {
     if (JavaVersion.current() >= JavaVersion.VERSION_17) {
         // Spotless configuration for Java files

src/main/java/org/opensearch/agent/ToolPlugin.java

@@ -13,6 +13,7 @@
 import org.opensearch.agent.tools.NeuralSparseSearchTool;
 import org.opensearch.agent.tools.PPLTool;
 import org.opensearch.agent.tools.VectorDBTool;
+import org.opensearch.agent.tools.VisualizationsTool;
 import org.opensearch.client.Client;
 import org.opensearch.cluster.metadata.IndexNameExpressionResolver;
 import org.opensearch.cluster.service.ClusterService;
@@ -56,13 +57,20 @@
         this.xContentRegistry = xContentRegistry;
 
         PPLTool.Factory.getInstance().init(client);
+        VisualizationsTool.Factory.getInstance().init(client);
         NeuralSparseSearchTool.Factory.getInstance().init(client, xContentRegistry);
         VectorDBTool.Factory.getInstance().init(client, xContentRegistry);
         return Collections.emptyList();
     }
 
     @Override
     public List<Tool.Factory<? extends Tool>> getToolFactories() {
-        return List.of(PPLTool.Factory.getInstance(), NeuralSparseSearchTool.Factory.getInstance(), VectorDBTool.Factory.getInstance());
+        return List
+            .of(
+                PPLTool.Factory.getInstance(),
+                NeuralSparseSearchTool.Factory.getInstance(),
+                VectorDBTool.Factory.getInstance(),
+                VisualizationsTool.Factory.getInstance()
+            );
     }
 }

src/main/java/org/opensearch/agent/tools/VisualizationsTool.java

@@ -0,0 +1,171 @@
+/*
+ * Copyright OpenSearch Contributors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+package org.opensearch.agent.tools;
+
+import java.util.Arrays;
+import java.util.Locale;
+import java.util.Map;
+import java.util.Optional;
+
+import org.opensearch.ExceptionsHelper;
+import org.opensearch.action.search.SearchRequest;
+import org.opensearch.action.search.SearchResponse;
+import org.opensearch.client.Client;
+import org.opensearch.client.Requests;
+import org.opensearch.core.action.ActionListener;
+import org.opensearch.index.IndexNotFoundException;
+import org.opensearch.index.query.BoolQueryBuilder;
+import org.opensearch.index.query.QueryBuilders;
+import org.opensearch.ml.common.spi.tools.Tool;
+import org.opensearch.ml.common.spi.tools.ToolAnnotation;
+import org.opensearch.search.SearchHits;
+import org.opensearch.search.builder.SearchSourceBuilder;
+
+import com.google.common.annotations.VisibleForTesting;
+import com.google.common.base.Strings;
+
+import lombok.Builder;
+import lombok.Getter;
+import lombok.Setter;
+import lombok.extern.log4j.Log4j2;
+
+@Log4j2
+@ToolAnnotation(VisualizationsTool.TYPE)
+public class VisualizationsTool implements Tool {
+    public static final String NAME = "FindVisualizations";
+    public static final String TYPE = "VisualizationTool";
+    public static final String VERSION = "v1.0";
+
+    public static final String SAVED_OBJECT_TYPE = "visualization";
+
+    /**
+     * default number of visualizations returned
+     */
+    private static final int DEFAULT_SIZE = 3;
+    private static final String DEFAULT_DESCRIPTION =
+        "Use this tool to find user created visualizations. This tool takes the visualization name as input and returns matching visualizations";
+    @Setter
+    @Getter
+    private String description = DEFAULT_DESCRIPTION;
+
+    @Getter
+    @Setter
+    private String name = NAME;
+    @Getter
+    @Setter
+    private String type = TYPE;
+    @Getter
+    private final String version = VERSION;
+    private final Client client;
+    @Getter
+    private final String index;
+    @Getter
+    private final int size;
+
+    @Builder
+    public VisualizationsTool(Client client, String index, int size) {
+        this.client = client;
+        this.index = index;
+        this.size = size;
+    }
+
+    @Override
+    public <T> void run(Map<String, String> parameters, ActionListener<T> listener) {
+        BoolQueryBuilder boolQueryBuilder = QueryBuilders.boolQuery();
+        boolQueryBuilder.must().add(QueryBuilders.termQuery("type", SAVED_OBJECT_TYPE));
+        boolQueryBuilder.must().add(QueryBuilders.matchQuery(SAVED_OBJECT_TYPE + ".title", parameters.get("input")));
+
+        SearchSourceBuilder searchSourceBuilder = SearchSourceBuilder.searchSource().query(boolQueryBuilder);
+        searchSourceBuilder.from(0).size(3);
+        SearchRequest searchRequest = Requests.searchRequest(index).source(searchSourceBuilder);
+
+        client.search(searchRequest, new ActionListener<>() {
+            @Override
+            public void onResponse(SearchResponse searchResponse) {
+                SearchHits hits = searchResponse.getHits();
+                StringBuilder visBuilder = new StringBuilder();
+                visBuilder.append("Title,Id\n");
+                if (hits.getTotalHits().value > 0) {
+                    Arrays.stream(hits.getHits()).forEach(h -> {
+                        String id = trimIdPrefix(h.getId());
+                        Map<String, String> visMap = (Map<String, String>) h.getSourceAsMap().get(SAVED_OBJECT_TYPE);
+                        String title = visMap.get("title");
+                        visBuilder.append(String.format(Locale.ROOT, "%s,%s\n", title, id));
+                    });
+
+                    listener.onResponse((T) visBuilder.toString());
+                } else {
+                    listener.onResponse((T) "No Visualization found");
+                }
+            }
+
+            @Override
+            public void onFailure(Exception e) {
+                if (ExceptionsHelper.unwrapCause(e) instanceof IndexNotFoundException) {
+                    listener.onResponse((T) "No Visualization found");
+                } else {
+                    listener.onFailure(e);
+                }
+            }
+        });
+    }
+
+    @VisibleForTesting
+    String trimIdPrefix(String id) {
+        id = Optional.ofNullable(id).orElse("");
+        if (id.startsWith(SAVED_OBJECT_TYPE)) {
+            String prefix = String.format(Locale.ROOT, "%s:", SAVED_OBJECT_TYPE);
+            return id.substring(prefix.length());
+        }
+        return id;
+    }
+
+    @Override
+    public boolean validate(Map<String, String> parameters) {
+        return parameters.containsKey("input") && !Strings.isNullOrEmpty(parameters.get("input"));
+    }
+
+    public static class Factory implements Tool.Factory<VisualizationsTool> {
+        private Client client;
+
+        private static VisualizationsTool.Factory INSTANCE;
+
+        public static VisualizationsTool.Factory getInstance() {
+            if (INSTANCE != null) {
+                return INSTANCE;
+            }
+            synchronized (VisualizationsTool.class) {
+                if (INSTANCE != null) {
+                    return INSTANCE;
+                }
+                INSTANCE = new VisualizationsTool.Factory();
+                return INSTANCE;
+            }
+        }
+
+        public void init(Client client) {
+            this.client = client;
+        }
+
+        @Override
+        public VisualizationsTool create(Map<String, Object> params) {
+            String index = params.get("index") == null ? ".kibana" : (String) params.get("index");
+            String sizeStr = params.get("size") == null ? "3" : (String) params.get("size");
+            int size;
+            try {
+                size = Integer.parseInt(sizeStr);
+            } catch (NumberFormatException ignored) {
+                size = DEFAULT_SIZE;
+            }
+            return VisualizationsTool.builder().client(client).index(index).size(size).build();
+        }
+
+        @Override
+        public String getDefaultDescription() {
+            return DEFAULT_DESCRIPTION;
+        }
+    }
+}

src/test/java/org/opensearch/agent/tools/VisualizationsToolTests.java

@@ -0,0 +1,161 @@
+/*
+ * Copyright OpenSearch Contributors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+package org.opensearch.agent.tools;
+
+import static org.junit.Assert.assertEquals;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.nio.charset.StandardCharsets;
+import java.util.Collections;
+import java.util.Map;
+import java.util.concurrent.CompletableFuture;
+
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+import org.mockito.ArgumentCaptor;
+import org.mockito.ArgumentMatchers;
+import org.mockito.Mock;
+import org.mockito.Mockito;
+import org.mockito.MockitoAnnotations;
+import org.opensearch.action.search.SearchRequest;
+import org.opensearch.action.search.SearchResponse;
+import org.opensearch.client.Client;
+import org.opensearch.common.xcontent.json.JsonXContent;
+import org.opensearch.core.action.ActionListener;
+import org.opensearch.core.xcontent.DeprecationHandler;
+import org.opensearch.core.xcontent.NamedXContentRegistry;
+import org.opensearch.index.IndexNotFoundException;
+import org.opensearch.ml.common.spi.tools.Tool;
+
+public class VisualizationsToolTests {
+    @Mock
+    private Client client;
+
+    private String searchResponse = "{}";
+    private String searchResponseNotFound = "{}";
+
+    @Before
+    public void setup() throws IOException {
+        MockitoAnnotations.openMocks(this);
+        VisualizationsTool.Factory.getInstance().init(client);
+        try (InputStream searchResponseIns = VisualizationsToolTests.class.getResourceAsStream("visualization.json")) {
+            if (searchResponseIns != null) {
+                searchResponse = new String(searchResponseIns.readAllBytes(), StandardCharsets.UTF_8);
+            }
+        }
+        try (InputStream searchResponseIns = VisualizationsToolTests.class.getResourceAsStream("visualization_not_found.json")) {
+            if (searchResponseIns != null) {
+                searchResponseNotFound = new String(searchResponseIns.readAllBytes(), StandardCharsets.UTF_8);
+            }
+        }
+    }
+
+    @Test
+    public void testToolIndexName() {
+        VisualizationsTool tool1 = VisualizationsTool.Factory.getInstance().create(Collections.emptyMap());
+        assertEquals(tool1.getIndex(), ".kibana");
+
+        VisualizationsTool tool2 = VisualizationsTool.Factory.getInstance().create(Map.of("index", "test-index"));
+        assertEquals(tool2.getIndex(), "test-index");
+    }
+
+    @Test
+    public void testNumberOfVisualizationReturned() {
+        VisualizationsTool tool1 = VisualizationsTool.Factory.getInstance().create(Collections.emptyMap());
+        assertEquals(tool1.getSize(), 3);
+
+        VisualizationsTool tool2 = VisualizationsTool.Factory.getInstance().create(Map.of("size", "1"));
+        assertEquals(tool2.getSize(), 1);
+
+        VisualizationsTool tool3 = VisualizationsTool.Factory.getInstance().create(Map.of("size", "badString"));
+        assertEquals(tool3.getSize(), 3);
+    }
+
+    @Test
+    public void testTrimPrefix() {
+        VisualizationsTool tool = VisualizationsTool.Factory.getInstance().create(Collections.emptyMap());
+        assertEquals(tool.trimIdPrefix(null), "");
+        assertEquals(tool.trimIdPrefix("abc"), "abc");
+        assertEquals(tool.trimIdPrefix("visualization:abc"), "abc");
+    }
+
+    @Test
+    public void testParameterValidation() {
+        VisualizationsTool tool = VisualizationsTool.Factory.getInstance().create(Collections.emptyMap());
+        Assert.assertFalse(tool.validate(Collections.emptyMap()));
+        Assert.assertFalse(tool.validate(Map.of("input", "")));
+        Assert.assertTrue(tool.validate(Map.of("input", "question")));
+    }
+
+    @Test
+    public void testRunToolWithVisualizationFound() throws Exception {
+        Tool tool = VisualizationsTool.Factory.getInstance().create(Collections.emptyMap());
+        final CompletableFuture<String> future = new CompletableFuture<>();
+        ActionListener<String> listener = ActionListener.wrap(future::complete, future::completeExceptionally);
+
+        ArgumentCaptor<ActionListener<SearchResponse>> searchResponseListener = ArgumentCaptor.forClass(ActionListener.class);
+        Mockito.doNothing().when(client).search(ArgumentMatchers.any(SearchRequest.class), searchResponseListener.capture());
+
+        Map<String, String> params = Map.of("input", "Sales by gender");
+
+        tool.run(params, listener);
+
+        SearchResponse response = SearchResponse
+            .fromXContent(
+                JsonXContent.jsonXContent.createParser(NamedXContentRegistry.EMPTY, DeprecationHandler.IGNORE_DEPRECATIONS, searchResponse)
+            );
+        searchResponseListener.getValue().onResponse(response);
+
+        future.join();
+        assertEquals("Title,Id\n[Ecommerce]Sales by gender,aeb212e0-4c84-11e8-b3d7-01146121b73d\n", future.get());
+    }
+
+    @Test
+    public void testRunToolWithNoVisualizationFound() throws Exception {
+        Tool tool = VisualizationsTool.Factory.getInstance().create(Collections.emptyMap());
+        final CompletableFuture<String> future = new CompletableFuture<>();
+        ActionListener<String> listener = ActionListener.wrap(future::complete, future::completeExceptionally);
+
+        ArgumentCaptor<ActionListener<SearchResponse>> searchResponseListener = ArgumentCaptor.forClass(ActionListener.class);
+        Mockito.doNothing().when(client).search(ArgumentMatchers.any(SearchRequest.class), searchResponseListener.capture());
+
+        Map<String, String> params = Map.of("input", "Sales by gender");
+
+        tool.run(params, listener);
+
+        SearchResponse response = SearchResponse
+            .fromXContent(
+                JsonXContent.jsonXContent
+                    .createParser(NamedXContentRegistry.EMPTY, DeprecationHandler.IGNORE_DEPRECATIONS, searchResponseNotFound)
+            );
+        searchResponseListener.getValue().onResponse(response);
+
+        future.join();
+        assertEquals("No Visualization found", future.get());
+    }
+
+    @Test
+    public void testRunToolWithIndexNotExists() throws Exception {
+        Tool tool = VisualizationsTool.Factory.getInstance().create(Collections.emptyMap());
+        final CompletableFuture<String> future = new CompletableFuture<>();
+        ActionListener<String> listener = ActionListener.wrap(future::complete, future::completeExceptionally);
+
+        ArgumentCaptor<ActionListener<SearchResponse>> searchResponseListener = ArgumentCaptor.forClass(ActionListener.class);
+        Mockito.doNothing().when(client).search(ArgumentMatchers.any(SearchRequest.class), searchResponseListener.capture());
+
+        Map<String, String> params = Map.of("input", "Sales by gender");
+
+        tool.run(params, listener);
+
+        IndexNotFoundException notFoundException = new IndexNotFoundException("test-index");
+        searchResponseListener.getValue().onFailure(notFoundException);
+
+        future.join();
+        assertEquals("No Visualization found", future.get());
+    }
+}