Add usage calculation for additional properties with model type

.chronus/changes/fix_usage_for_additional_properties-2024-1-23-18-7-29.md

@@ -0,0 +1,7 @@
+---
+changeKind: fix
+packages:
+  - "@azure-tools/typespec-client-generator-core"
+---
+
+Add usage calculation for additional properties with model type

packages/typespec-client-generator-core/src/types.ts

@@ -931,6 +931,7 @@ function updateModelsMap(context: SdkContext, type: Type, sdkType: SdkType, oper
     } else {
       context.operationModelsMap.set(operation, new Map([[type, sdkType]]));
     }
+    // TODO: it seems duplicate calculation, need to optimize later
     if (sdkType.kind === "model") {
       for (const prop of sdkType.properties) {
         if (prop.type.kind === "model" || prop.type.kind === "enum") {
@@ -953,6 +954,14 @@ function updateModelsMap(context: SdkContext, type: Type, sdkType: SdkType, oper
       if (sdkType.baseModel) {
         updateModelsMap(context, sdkType.baseModel.__raw as any, sdkType.baseModel, operation);
       }
+      if (sdkType.additionalProperties) {
+        updateModelsMap(
+          context,
+          sdkType.additionalProperties.__raw as any,
+          sdkType.additionalProperties,
+          operation
+        );
+      }
       if (sdkType.discriminatedSubtypes) {
         for (const subtype of Object.values(sdkType.discriminatedSubtypes)) {
           updateModelsMap(context, subtype.__raw as any, subtype, operation);
@@ -1020,6 +1029,9 @@ function updateUsageOfModel(
       updateUsageOfModel(context, discriminatedSubtype, usage, seenModelNames);
     }
   }
+  if (type.additionalProperties) {
+    updateUsageOfModel(context, type.additionalProperties, usage, seenModelNames);
+  }
   for (const property of type.properties) {
     updateUsageOfModel(context, property.type, usage, seenModelNames);
   }

packages/typespec-client-generator-core/test/types.test.ts

@@ -1907,6 +1907,39 @@ describe("typespec-client-generator-core: types", () => {
       strictEqual(AdditionalPropertiesModel2.baseModel, undefined);
       strictEqual(NonAdditionalPropertiesModel.additionalProperties, undefined);
     });
+    it("additionalProperties usage", async () => {
+      await runner.compileWithBuiltInService(`
+        @service({})
+        namespace MyService {
+          model AdditionalPropertiesModel extends Record<Test> {
+          }
+
+          model AdditionalPropertiesModel2 is Record<Test> {
+          }
+
+          model Test {
+          }
+
+          op test(@body input: AdditionalPropertiesModel): AdditionalPropertiesModel2;
+        }
+      `);
+      const models = getAllModelsAssertNoDiagnostics(runner.context);
+      strictEqual(models.length, 3);
+      const AdditionalPropertiesModel = models.find(
+        (x) => x.name === "AdditionalPropertiesModel"
+      )! as SdkModelType;
+      const AdditionalPropertiesModel2 = models.find(
+        (x) => x.name === "AdditionalPropertiesModel2"
+      )! as SdkModelType;
+      const Test = models.find((x) => x.name === "Test")! as SdkModelType;
+      strictEqual(AdditionalPropertiesModel.additionalProperties?.kind, "model");
+      strictEqual(AdditionalPropertiesModel.baseModel, undefined);
+      strictEqual(AdditionalPropertiesModel.usage, UsageFlags.Input);
+      strictEqual(AdditionalPropertiesModel2.additionalProperties?.kind, "model");
+      strictEqual(AdditionalPropertiesModel2.baseModel, undefined);
+      strictEqual(AdditionalPropertiesModel2.usage, UsageFlags.Output);
+      strictEqual(Test.usage, UsageFlags.Input | UsageFlags.Output);
+    });
     it("crossLanguageDefinitionId", async () => {
       await runner.compile(`
         @service({})