feat(oas31): display file upload input when contentMediaType or contentEncoding is present (#10412)

Refs #9278

src/core/plugins/oas31/oas3-extensions/fn.js

@@ -1,12 +1,45 @@
 /**
  * @prettier
  */
+import { Map } from "immutable"
+import isPlainObject from "lodash/isPlainObject"
 
 export const makeIsFileUploadIntended = (getSystem) => {
   const isFileUploadIntended = (schema, mediaType = null) => {
     const { fn } = getSystem()
 
-    return fn.isFileUploadIntendedOAS30(schema, mediaType)
+    /**
+     *  Return `true` early if the media type indicates a file upload
+     *  or if a combination of type: `string` and format: `binary/byte` is detected.
+     *  This ensures support for empty Media Type Objects,
+     *  as the schema check is performed later.
+     */
+    const isFileUploadIntendedOAS30 = fn.isFileUploadIntendedOAS30(
+      schema,
+      mediaType
+    )
+
+    if (isFileUploadIntendedOAS30) {
+      return true
+    }
+
+    const isSchemaImmutable = Map.isMap(schema)
+
+    if (!isSchemaImmutable && !isPlainObject(schema)) {
+      return false
+    }
+
+    const contentMediaType = isSchemaImmutable
+      ? schema.get("contentMediaType")
+      : schema.contentMediaType
+    const contentEncoding = isSchemaImmutable
+      ? schema.get("contentEncoding")
+      : schema.contentEncoding
+
+    return (
+      (typeof contentMediaType === "string" && contentMediaType !== "") ||
+      (typeof contentEncoding === "string" && contentEncoding !== "")
+    )
   }
 
   return isFileUploadIntended