Ability to add custom operation name for request (#682)

* Ability to add custom operation name for request
Co-authored-by: NRobbert Noordzij <robbert@robbertnoordzij.nl>
Co-authored-by: NBogdan Kobylynskyi <92bogdan@gmail.com>

src/main/java/com/kobylynskyi/graphql/codegen/model/graphql/GraphQLRequest.java

@@ -5,14 +5,25 @@ package com.kobylynskyi.graphql.codegen.model.graphql;
  */
 public class GraphQLRequest {
 
+    private final String operationName;
     private final GraphQLOperationRequest request;
     private final GraphQLResponseProjection responseProjection;
 
     public GraphQLRequest(GraphQLOperationRequest request) {
-        this(request, null);
+        this(null, request, null);
+    }
+
+    public GraphQLRequest(String operationName, GraphQLOperationRequest request) {
+        this(operationName, request, null);
     }
 
     public GraphQLRequest(GraphQLOperationRequest request, GraphQLResponseProjection responseProjection) {
+        this(null, request, responseProjection);
+    }
+
+    public GraphQLRequest(String operationName, GraphQLOperationRequest request,
+        GraphQLResponseProjection responseProjection) {
+        this.operationName = operationName;
         this.request = request;
         this.responseProjection = responseProjection;
     }
@@ -25,6 +36,10 @@ public class GraphQLRequest {
         return responseProjection;
     }
 
+    public String getOperationName() {
+        return operationName;
+    }
+
     /**
      * Serializes GraphQL request to be used as HTTP JSON body
      * according to https://graphql.org/learn/serving-over-http specifications

src/main/java/com/kobylynskyi/graphql/codegen/model/graphql/GraphQLRequestSerializer.java

@@ -49,7 +49,7 @@ public class GraphQLRequestSerializer {
         }
         return jsonQuery(operationWrapper(
                 firstRequest.getOperationType(),
-                null, // combined request does not have operation name
+                graphQLRequests.getOperationName(),
                 queryBuilder.toString()));
     }
 
@@ -77,9 +77,13 @@ public class GraphQLRequestSerializer {
         if (graphQLRequest == null || graphQLRequest.getRequest() == null) {
             return null;
         }
+
+        String operationName = graphQLRequest.getOperationName() == null ?
+            graphQLRequest.getRequest().getOperationName() : graphQLRequest.getOperationName();
+
         return operationWrapper(
                 graphQLRequest.getRequest().getOperationType(),
-                graphQLRequest.getRequest().getOperationName(),
+                operationName,
                 buildQuery(graphQLRequest));
     }
 

src/main/java/com/kobylynskyi/graphql/codegen/model/graphql/GraphQLRequests.java

@@ -9,9 +9,15 @@ import java.util.List;
  */
 public class GraphQLRequests {
 
+    private final String operationName;
     private final List<GraphQLRequest> requests = new ArrayList<>();
 
     public GraphQLRequests(GraphQLRequest... requests) {
+        this(null, requests);
+    }
+
+    public GraphQLRequests(String operationName, GraphQLRequest... requests) {
+        this.operationName = operationName;
         this.requests.addAll(Arrays.asList(requests));
     }
 
@@ -23,6 +29,10 @@ public class GraphQLRequests {
         return new ArrayList<>(requests);
     }
 
+    public String getOperationName() {
+        return operationName;
+    }
+
     /**
      * Serializes multiple GraphQL requests to be used as HTTP JSON body
      * according to https://graphql.org/learn/serving-over-http specifications

src/test/java/com/kobylynskyi/graphql/codegen/model/graphql/GraphQLRequestSerializerTest.java

@@ -256,6 +256,27 @@ class GraphQLRequestSerializerTest {
         assertEquals(expectedQueryDecorator.apply(expectedQueryStr), serializedQuery);
     }
 
+    @ParameterizedTest(name = "{0}")
+    @MethodSource("provideAllSerializers")
+    void serialize_withCustomOpertionName(String name, Function<GraphQLRequest, String> serializer,
+                                          Function<String, String> expectedQueryDecorator) {
+        EventsByIdsQueryRequest request = new EventsByIdsQueryRequest.Builder()
+            .setContextId("something")
+            .setIds(null)
+            .setTranslated(false)
+            .build();
+        GraphQLRequest graphQLRequest = new GraphQLRequest(
+            "customOperationName",
+            request,
+            new EventResponseProjection()
+                .id()
+        );
+        String serializedQuery = serializer.apply(graphQLRequest).replaceAll(" +", " ").trim();
+        String expectedQueryStr = "query customOperationName { " +
+            "eventsByIds(contextId: \"something\", translated: false){ id } }";
+        assertEquals(expectedQueryDecorator.apply(expectedQueryStr), serializedQuery);
+    }
+
     @ParameterizedTest(name = "{0}")
     @MethodSource("provideAllSerializers")
     void serialize_complexRequestWithDefaultData(String name, Function<GraphQLRequest, String> serializer,
@@ -505,6 +526,38 @@ class GraphQLRequestSerializerTest {
         assertEquals(expectedQueryDecorator.apply(expectedQueryStr), serializedQuery);
     }
 
+    @ParameterizedTest(name = "{0}")
+    @MethodSource("provideStaticSerializerForMultiRequest")
+    void serialize_multipleRequestsWithCustomOperationName(String name, Function<GraphQLRequests, String> serializer,
+                                    Function<String, String> expectedQueryDecorator) {
+        EventsByCategoryAndStatusQueryRequest request1 = new EventsByCategoryAndStatusQueryRequest.Builder()
+            .alias("req1").setStatus(Status.OPEN).build();
+        GraphQLRequest graphQLRequest1 = new GraphQLRequest(request1, new EventResponseProjection().id());
+
+        EventsByCategoryAndStatusQueryRequest request2 = new EventsByCategoryAndStatusQueryRequest("req2");
+        GraphQLRequest graphQLRequest2 = new GraphQLRequest(request2, new EventResponseProjection().id().status());
+
+        EventsByCategoryAndStatusQueryRequest request21 = new EventsByCategoryAndStatusQueryRequest();
+        GraphQLRequest graphQLRequest21 = new GraphQLRequest(request21);
+
+        GraphQLRequests requests = new GraphQLRequests(
+            "customOperationName",
+            graphQLRequest1,
+            graphQLRequest2,
+            graphQLRequest21
+        );
+
+        String serializedQuery = serializer
+            .apply(requests).replaceAll(" +", " ")
+            .trim();
+        String expectedQueryStr = "query customOperationName { " +
+            "req1: eventsByCategoryAndStatus(status: OPEN){ id } " +
+            "req2: eventsByCategoryAndStatus{ id status } " +
+            "eventsByCategoryAndStatus " +
+            "}";
+        assertEquals(expectedQueryDecorator.apply(expectedQueryStr), serializedQuery);
+    }
+
     @ParameterizedTest(name = "{0}")
     @MethodSource("provideStaticSerializerForMultiRequest")
     void serialize_multipleRequests_DiffTypes(String name, Function<GraphQLRequests, String> serializer,