prepare interface for multiple responses (#247)

Author: hauner

openapi-processor-core/src/main/kotlin/io/openapiprocessor/core/converter/ContentTypeInterface.kt

@@ -0,0 +1,10 @@
+/*
+ * Copyright 2025 https://github.com/openapi-processor/openapi-processor-base
+ * PDX-License-Identifier: Apache-2.0
+ */
+
+package io.openapiprocessor.core.converter
+
+import io.openapiprocessor.core.parser.HttpMethod
+
+class ContentTypeInterface(val path: String, val method: HttpMethod)

openapi-processor-core/src/main/kotlin/io/openapiprocessor/core/converter/ContentTypeInterfaceCollector.kt

@@ -0,0 +1,34 @@
+/*
+ * Copyright 2025 https://github.com/openapi-processor/openapi-processor-base
+ * PDX-License-Identifier: Apache-2.0
+ */
+
+package io.openapiprocessor.core.converter
+
+import io.openapiprocessor.core.parser.ContentType
+import io.openapiprocessor.core.parser.HttpMethod
+import io.openapiprocessor.core.parser.HttpStatus
+import io.openapiprocessor.core.parser.Response
+
+class ContentTypeInterfaceCollector(
+    private val path: String,
+    private val method: HttpMethod,
+    responseCollector: ContentTypeResponseCollector
+) {
+    val contentTypeInterfaces: Map<String, ContentTypeInterface> = collectInterfaces(
+        responseCollector.contentTypeResponses
+    )
+
+    private fun collectInterfaces(contentTypeResponses: Map<ContentType, Map<HttpStatus, Response>>)
+    : Map<String, ContentTypeInterface> {
+        val contentTypeInterfaces = mutableMapOf<String, ContentTypeInterface>()
+
+        contentTypeResponses.forEach { (contentType, statusResponses) ->
+            if (statusResponses.size > 1) {
+                contentTypeInterfaces[contentType] = ContentTypeInterface(path, method)
+            }
+        }
+
+        return contentTypeInterfaces
+    }
+}