chore(codegen): wip AddCompressionDependency

Author: trivikr

codegen/smithy-aws-typescript-codegen/src/main/java/software/amazon/smithy/aws/typescript/codegen/AddCompressionDependency.java

@@ -0,0 +1,88 @@
+/*
+ * Copyright 2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *  http://aws.amazon.com/apache2.0
+ *
+ * or in the "license" file accompanying this file. This file 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 software.amazon.smithy.aws.typescript.codegen;
+
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.function.Consumer;
+import java.util.logging.Logger;
+
+import software.amazon.smithy.aws.traits.ServiceTrait;
+import software.amazon.smithy.aws.typescript.codegen.extensions.AwsRegionExtensionConfiguration;
+import software.amazon.smithy.codegen.core.SymbolProvider;
+import software.amazon.smithy.model.Model;
+import software.amazon.smithy.model.knowledge.TopDownIndex;
+import software.amazon.smithy.model.shapes.OperationShape;
+import software.amazon.smithy.model.shapes.ServiceShape;
+import software.amazon.smithy.model.traits.RequestCompressionTrait;
+import software.amazon.smithy.typescript.codegen.LanguageTarget;
+import software.amazon.smithy.typescript.codegen.TypeScriptDependency;
+import software.amazon.smithy.typescript.codegen.TypeScriptSettings;
+import software.amazon.smithy.typescript.codegen.TypeScriptWriter;
+import software.amazon.smithy.typescript.codegen.extensions.ExtensionConfigurationInterface;
+import software.amazon.smithy.typescript.codegen.integration.TypeScriptIntegration;
+import software.amazon.smithy.utils.MapUtils;
+import software.amazon.smithy.utils.SmithyInternalApi;
+
+/**
+ * Adds compression dependencies if needed.
+ */
+@SmithyInternalApi
+public final class AddCompressionDependency implements TypeScriptIntegration {
+
+    private static final Logger LOGGER = Logger.getLogger(AddAwsRuntimeConfig.class.getName());
+
+    @Override
+    public Map<String, Consumer<TypeScriptWriter>> getRuntimeConfigWriters(
+            TypeScriptSettings settings,
+            Model model,
+            SymbolProvider symbolProvider,
+            LanguageTarget target
+    ) {
+        if (!hasRequestCompressionTrait(model, settings.getService(model))) {
+            return Collections.emptyMap();
+        }
+
+        switch (target) {
+            case NODE:
+
+            default:
+                return Collections.emptyMap();
+        }
+    }
+
+    // return true if operation shape is decorated with `httpChecksum` trait.
+    private static boolean hasRequestCompressionTrait(OperationShape operation) {
+        return operation.hasTrait(RequestCompressionTrait.class);
+    }
+
+    private static boolean hasRequestCompressionTrait(
+            Model model,
+            ServiceShape service
+    ) {
+        TopDownIndex topDownIndex = TopDownIndex.of(model);
+        Set<OperationShape> operations = topDownIndex.getContainedOperations(service);
+        for (OperationShape operation : operations) {
+            if (hasRequestCompressionTrait(operation)) {
+                return true;
+            }
+        }
+        return false;
+    }
+}

codegen/smithy-aws-typescript-codegen/src/main/resources/META-INF/services/software.amazon.smithy.typescript.codegen.integration.TypeScriptIntegration

@@ -30,3 +30,4 @@ software.amazon.smithy.aws.typescript.codegen.auth.http.integration.AwsSdkCustom
 software.amazon.smithy.aws.typescript.codegen.auth.http.integration.AddAwsDefaultSigningName
 software.amazon.smithy.aws.typescript.codegen.auth.http.integration.AddSTSAuthCustomizations
 software.amazon.smithy.aws.typescript.codegen.auth.http.integration.AwsSdkCustomizeEndpointRuleSetHttpAuthSchemeProvider
+software.amazon.smithy.aws.typescript.codegen.AddCompressionDependency