generate example for using bare-bone client and command API

also makes filterSensitive internal

Author: AllanZhengYP

smithy-typescript-codegen/src/main/java/software/amazon/smithy/typescript/codegen/CommandGenerator.java

@@ -105,7 +105,8 @@ private void generateClientCommand() {
         writer.addImport("MiddlewareStack", "MiddlewareStack", "@aws-sdk/types");
 
         String name = symbol.getName();
-        writer.writeShapeDocs(operation);
+        writer.writeShapeDocs(operation, shapeDoc -> shapeDoc + "\n" + getCommandExample(serviceSymbol.getName(),
+                configType, name, inputType.getName(), outputType.getName()));
         writer.openBlock("export class $L extends $$Command<$T, $T, $L> {", "}", name, inputType, outputType,
                 configType, () -> {
 
@@ -128,6 +129,21 @@ private void generateClientCommand() {
         });
     }
 
+    private String getCommandExample(String serviceName, String configName, String commandName, String commandInput,
+                    String commandOutput) {
+        return "@example\n"
+            + "User a bare-bone client and the command you need to make an API call.\n"
+            + "```javascript\n"
+            + String.format("const client = new %s(config);%n", serviceName)
+            + String.format("const command = new %s(input);%n", commandName)
+            + "const response = await client.send(command);\n"
+            + "```\n"
+            + "\n"
+            + String.format("@see {@link %s} for command's `input` shape.%n", commandInput)
+            + String.format("@see {@link %s} for command's `response` shape.%n", commandOutput)
+            + String.format("@see {@link %s | config} for command's `input` shape.%n", configName);
+    }
+
     private void generateCommandConstructor() {
         writer.openBlock("constructor(readonly input: $T) {", "}", inputType, () -> {
             // The constructor can be intercepted and changed.

smithy-typescript-codegen/src/main/java/software/amazon/smithy/typescript/codegen/TypeScriptWriter.java

@@ -23,6 +23,7 @@
 import java.util.List;
 import java.util.StringJoiner;
 import java.util.function.BiFunction;
+import java.util.function.UnaryOperator;
 import java.util.logging.Logger;
 import software.amazon.smithy.codegen.core.CodegenException;
 import software.amazon.smithy.codegen.core.Symbol;
@@ -208,15 +209,17 @@ public TypeScriptWriter writeDocs(String docs) {
     }
 
     /**
-     * Writes shape documentation comments if docs are present.
+     * Modifies and writes shape documentation comments if docs are present.
      *
      * @param shape Shape to write the documentation of.
+     * @param preprocessor UnaryOperator that takes documentation and returns modified one.
      * @return Returns true if docs were written.
      */
-    boolean writeShapeDocs(Shape shape) {
+    boolean writeShapeDocs(Shape shape, UnaryOperator<String> preprocessor) {
         return shape.getTrait(DocumentationTrait.class)
                 .map(DocumentationTrait::getValue)
                 .map(docs -> {
+                    docs = preprocessor.apply(docs);
                     if (shape.getTrait(DeprecatedTrait.class).isPresent()) {
                         docs = "@deprecated\n\n" + docs;
                     }
@@ -225,6 +228,16 @@ boolean writeShapeDocs(Shape shape) {
                 }).orElse(false);
     }
 
+    /**
+     * Writes shape documentation comments if docs are present.
+     *
+     * @param shape Shape to write the documentation of.
+     * @return Returns true if docs were written.
+     */
+    boolean writeShapeDocs(Shape shape) {
+        return writeShapeDocs(shape, (docs) -> docs);
+    }
+
     /**
      * Writes member shape documentation comments if docs are present.
      *