feat:Add operators to search endpoint

src/main/java/io/github/genomicdatainfrastructure/discovery/services/CkanDatasetsSearchService.java

@@ -28,7 +28,7 @@ public CkanDatasetsSearchService(
 
     @Override
     public DatasetsSearchResponse search(DatasetSearchQuery query, String accessToken) {
-        var facetsQuery = CkanFacetsQueryBuilder.buildFacetQuery(query.getFacets());
+        var facetsQuery = CkanFacetsQueryBuilder.buildFacetQuery(query);
 
         var response = ckanQueryApi.packageSearch(
                 query.getQuery(),

src/main/java/io/github/genomicdatainfrastructure/discovery/services/CkanFacetsQueryBuilder.java

@@ -7,6 +7,7 @@
 import java.util.List;
 import java.util.Objects;
 
+import io.github.genomicdatainfrastructure.discovery.model.DatasetSearchQuery;
 import io.github.genomicdatainfrastructure.discovery.model.DatasetSearchQueryFacet;
 import lombok.experimental.UtilityClass;
 
@@ -21,18 +22,20 @@ public class CkanFacetsQueryBuilder {
     private final String CKAN_FACET_GROUP = "ckan";
     private final String QUOTED_VALUE = "\"%s\"";
     private final String FACET_PATTERN = "%s:(%s)";
-    private final String AND = " AND ";
 
-    public String buildFacetQuery(List<DatasetSearchQueryFacet> facets) {
+    public String buildFacetQuery(DatasetSearchQuery query) {
+        var facets = query.getFacets();
+        var operator = query.getOperator();
+
         var nonNullFacets = ofNullable(facets)
                 .orElseGet(List::of)
                 .stream()
                 .filter(CkanFacetsQueryBuilder::isCkanGroupAndFacetIsNotBlank)
                 .collect(groupingBy(DatasetSearchQueryFacet::getFacet));
 
         return nonNullFacets.entrySet().stream()
-                .map(entry -> getFacetQuery(entry.getKey(), entry.getValue()))
-                .collect(joining(AND));
+                .map(entry -> getFacetQuery(entry.getKey(), entry.getValue(), operator))
+                .collect(joining(OperatorMapper.getOperator(operator)));
     }
 
     private Boolean isCkanGroupAndFacetIsNotBlank(DatasetSearchQueryFacet facet) {
@@ -43,10 +46,10 @@ private Boolean isCkanGroupAndFacetIsNotBlank(DatasetSearchQueryFacet facet) {
                 !facet.getValue().isBlank();
     }
 
-    private String getFacetQuery(String key, List<DatasetSearchQueryFacet> facets) {
+    private String getFacetQuery(String key, List<DatasetSearchQueryFacet> facets, String operator) {
         var values = facets.stream()
                 .map(facet -> QUOTED_VALUE.formatted(facet.getValue()))
-                .collect(joining(AND));
+                .collect(joining(OperatorMapper.getOperator(operator)));
 
         return FACET_PATTERN.formatted(key, values);
     }

src/main/java/io/github/genomicdatainfrastructure/discovery/services/Operator.java

@@ -0,0 +1,13 @@
+// SPDX-FileCopyrightText: 2024 PNED G.I.E.
+//
+// SPDX-License-Identifier: Apache-2.0
+
+package io.github.genomicdatainfrastructure.discovery.services;
+
+import lombok.experimental.UtilityClass;
+
+@UtilityClass
+public class Operator {
+    public static final String Or = "or";
+    public static final String And = "and";
+}

src/main/java/io/github/genomicdatainfrastructure/discovery/services/OperatorMapper.java

@@ -0,0 +1,18 @@
+// SPDX-FileCopyrightText: 2024 PNED G.I.E.
+//
+// SPDX-License-Identifier: Apache-2.0
+
+package io.github.genomicdatainfrastructure.discovery.services;
+
+import lombok.experimental.UtilityClass;
+
+@UtilityClass
+public class OperatorMapper {
+
+    private final String AND = " AND ";
+    private final String OR = " OR ";
+
+    public String getOperator(String operator) {
+        return operator.equals(Operator.Or) ? OR : AND;
+    }
+}

src/main/openapi/discovery.yaml

@@ -112,6 +112,9 @@ components:
           title: Offset in the complete result set
           default: 0
           minimum: 0
+        operator:
+          type: string
+          default: "and"
     DatasetSearchQueryFacet:
       type: object
       properties:

src/test/java/io/github/genomicdatainfrastructure/discovery/services/CkanFacetsQueryBuilderTest.java

@@ -4,6 +4,7 @@
 
 package io.github.genomicdatainfrastructure.discovery.services;
 
+import io.github.genomicdatainfrastructure.discovery.model.DatasetSearchQuery;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.NullSource;
@@ -20,7 +21,7 @@ class CkanFacetsQueryBuilderTest {
     @Test
     void can_parse_if_empty_list() {
         var expected = "";
-        var actual = CkanFacetsQueryBuilder.buildFacetQuery(List.of());
+        var actual = CkanFacetsQueryBuilder.buildFacetQuery(null);
         assertEquals(expected, actual);
     }
 
@@ -34,7 +35,7 @@ void can_parse_if_null_list() {
     @ParameterizedTest
     @NullSource
     @ValueSource(strings = {"", " ", "  "})
-    void can_parse(String value) {
+    void can_parse_with_and_operator(String value) {
         var facets = List.of(
                 new DatasetSearchQueryFacet("ckan", "field1", "value1"),
                 new DatasetSearchQueryFacet("ckan", "field1", "value2"),
@@ -47,8 +48,37 @@ void can_parse(String value) {
                 new DatasetSearchQueryFacet(value, "field2", "value3")
         );
 
+        var query = new DatasetSearchQuery();
+        query.setFacets(facets);
+        query.setOperator(Operator.And);
+
         var expected = "field1:(\"value1\" AND \"value2\") AND field2:(\"value3\")";
-        var actual = CkanFacetsQueryBuilder.buildFacetQuery(facets);
+        var actual = CkanFacetsQueryBuilder.buildFacetQuery(query);
+        assertEquals(expected, actual);
+    }
+
+    @ParameterizedTest
+    @NullSource
+    @ValueSource(strings = {"", " ", "  "})
+    void can_parse_with_or_operator(String value) {
+        var facets = List.of(
+                new DatasetSearchQueryFacet("ckan", "field1", "value1"),
+                new DatasetSearchQueryFacet("ckan", "field1", "value2"),
+                new DatasetSearchQueryFacet("ckan", "field2", "value3"),
+                new DatasetSearchQueryFacet("dummy", "field2", "value"),
+                new DatasetSearchQueryFacet(null, "field2", "value"),
+                new DatasetSearchQueryFacet(null, null, "value"),
+                new DatasetSearchQueryFacet("ckan", value, "value3"),
+                new DatasetSearchQueryFacet("ckan", "field2", value),
+                new DatasetSearchQueryFacet(value, "field2", "value3")
+        );
+
+        var query = new DatasetSearchQuery();
+        query.setFacets(facets);
+        query.setOperator(Operator.Or);
+
+        var expected = "field1:(\"value1\" OR \"value2\") OR field2:(\"value3\")";
+        var actual = CkanFacetsQueryBuilder.buildFacetQuery(query);
         assertEquals(expected, actual);
     }
 }