[kotlin-spring] Fix cookie parameter code generation in API (#17959)

* + Cookie parameter generation fixed

* Added cookie parameter mustache template for generating cookie related code
* Adapted kotlin-spring api templates to include cookie parameters
* Added tests for evaluating cookie parameter code generation
* Added configuration sample for the new cookie use case

* - Unused fake cases removed

* Removed fake cases from openapi spec that were not related to cookie usage
* Cleaned sample files

bin/configs/kotlin-spring-boot-request-cookie.yaml

@@ -0,0 +1,9 @@
+generatorName: kotlin-spring
+outputDir: samples/server/petstore/kotlin-springboot-request-cookie
+library: spring-boot
+inputSpec: modules/openapi-generator/src/test/resources/3_0/kotlin/petstore-with-fake-endpoints-for-testing-with-cookie.yaml
+templateDir: modules/openapi-generator/src/main/resources/kotlin-spring
+additionalProperties:
+  appendRequestToHandler: true
+  interfaceOnly: true
+  useSpringBoot3: true

modules/openapi-generator/src/main/resources/kotlin-spring/api.mustache

@@ -90,7 +90,7 @@ class {{classname}}Controller({{#serviceInterface}}@Autowired(required = true) v
         produces = [{{#produces}}"{{{mediaType}}}"{{^-last}}, {{/-last}}{{/produces}}]{{/hasProduces}}{{#hasConsumes}},
         consumes = [{{#consumes}}"{{{mediaType}}}"{{^-last}}, {{/-last}}{{/consumes}}]{{/hasConsumes}}{{/singleContentTypes}}
     )
-    {{#reactive}}{{^isArray}}suspend {{/isArray}}{{/reactive}}fun {{operationId}}({{#allParams}}{{>queryParams}}{{>pathParams}}{{>headerParams}}{{>bodyParams}}{{>formParams}}{{>requesObject}}{{^-last}},{{/-last}}{{/allParams}}): ResponseEntity<{{>returnTypes}}> {
+    {{#reactive}}{{^isArray}}suspend {{/isArray}}{{/reactive}}fun {{operationId}}({{#allParams}}{{>queryParams}}{{>pathParams}}{{>headerParams}}{{>cookieParams}}{{>bodyParams}}{{>formParams}}{{>requesObject}}{{^-last}},{{/-last}}{{/allParams}}): ResponseEntity<{{>returnTypes}}> {
         return {{>returnValue}}
     }
 {{/operation}}

modules/openapi-generator/src/main/resources/kotlin-spring/apiInterface.mustache

@@ -102,7 +102,7 @@ interface {{classname}} {
             produces = [{{#produces}}"{{{mediaType}}}"{{^-last}}, {{/-last}}{{/produces}}]{{/hasProduces}}{{#hasConsumes}},
             consumes = [{{#consumes}}"{{{mediaType}}}"{{^-last}}, {{/-last}}{{/consumes}}]{{/hasConsumes}}{{/singleContentTypes}}
     )
-    {{#reactive}}{{^isArray}}suspend {{/isArray}}{{/reactive}}fun {{operationId}}({{#allParams}}{{>queryParams}}{{>pathParams}}{{>headerParams}}{{>bodyParams}}{{>formParams}}{{>requesObject}}{{^-last}},{{/-last}}{{/allParams}}): ResponseEntity<{{>returnTypes}}>{{^skipDefaultInterface}} {
+    {{#reactive}}{{^isArray}}suspend {{/isArray}}{{/reactive}}fun {{operationId}}({{#allParams}}{{>queryParams}}{{>pathParams}}{{>headerParams}}{{>cookieParams}}{{>bodyParams}}{{>formParams}}{{>requesObject}}{{^-last}},{{/-last}}{{/allParams}}): ResponseEntity<{{>returnTypes}}>{{^skipDefaultInterface}} {
         {{^isDelegate}}
         return {{>returnValue}}
         {{/isDelegate}}

modules/openapi-generator/src/main/resources/kotlin-spring/cookieParams.mustache

@@ -0,0 +1 @@
+{{#isCookieParam}}{{#useBeanValidation}}{{>beanValidationQueryParams}}{{/useBeanValidation}}@CookieValue(name = "{{baseName}}"{{^required}}, required = false{{/required}}{{#defaultValue}}, defaultValue = "{{{.}}}"{{/defaultValue}}) {{paramName}}: {{>optionalDataType}}{{/isCookieParam}}

modules/openapi-generator/src/test/java/org/openapitools/codegen/kotlin/spring/KotlinSpringServerCodegenTest.java

@@ -435,6 +435,48 @@ public void skipDefaultInterface() throws Exception {
         );
     }
 
+    @Test(description = "test cookie parameter generation on interface apis")
+    public void cookieParameterGenerationApis() throws Exception {
+        File output = Files.createTempDirectory("test").toFile().getCanonicalFile();
+        output.deleteOnExit();
+        String outputPath = output.getAbsolutePath().replace('\\', '/');
+
+        KotlinSpringServerCodegen codegen = new KotlinSpringServerCodegen();
+        codegen.setOutputDir(output.getAbsolutePath());
+        codegen.additionalProperties().put(KotlinSpringServerCodegen.INTERFACE_ONLY, true);
+        codegen.additionalProperties().put(KotlinSpringServerCodegen.SKIP_DEFAULT_INTERFACE, true);
+
+        new DefaultGenerator().opts(new ClientOptInput()
+                .openAPI(TestUtils.parseSpec("src/test/resources/3_0/kotlin/petstore-with-fake-endpoints-for-testing-with-cookie.yaml"))
+                .config(codegen))
+            .generate();
+
+        assertFileContains(
+            Paths.get(outputPath + "/src/main/kotlin/org/openapitools/api/FakeApi.kt"),
+            "@CookieValue"
+        );
+    }
+
+    @Test(description = "test cookie parameter generation on controllers")
+    public void cookieParameterGenerationControllers() throws Exception {
+        File output = Files.createTempDirectory("test").toFile().getCanonicalFile();
+        output.deleteOnExit();
+        String outputPath = output.getAbsolutePath().replace('\\', '/');
+
+        KotlinSpringServerCodegen codegen = new KotlinSpringServerCodegen();
+        codegen.setOutputDir(output.getAbsolutePath());
+
+        new DefaultGenerator().opts(new ClientOptInput()
+                .openAPI(TestUtils.parseSpec("src/test/resources/3_0/kotlin/petstore-with-fake-endpoints-for-testing-with-cookie.yaml"))
+                .config(codegen))
+            .generate();
+
+        assertFileContains(
+            Paths.get(outputPath + "/src/main/kotlin/org/openapitools/api/FakeApiController.kt"),
+            "@CookieValue"
+        );
+    }
+
     @Test(description = "use Spring boot 3 & jakarta extension")
     public void useSpringBoot3() throws Exception {
         File output = Files.createTempDirectory("test").toFile().getCanonicalFile();