fix: application crash by clipping the recursion using WeakSet (#1101)

* clipped the recursion with a recursion limit of 10

* linting

* added-weaksets

* lint-fix

* added Error Message

* linting

---------

Co-authored-by: asyncapi-bot <[email protected]>
Co-authored-by: Cody's Dad <[email protected]>

Author: 3 people

library/src/helpers/schema.ts

@@ -518,7 +518,9 @@ export class SchemaHelpers {
   }
 
   // eslint-disable-next-line @typescript-eslint/no-explicit-any
-  private static jsonFieldToSchema(value: any): any {
+  private static jsonFieldToSchema(value: any, visited = new WeakSet()): any {
+    // visited should never be passed as parameter.
+    // it is meant for internal recursion limit tracking
     if (value === undefined || value === null) {
       return {
         type: 'string',
@@ -538,14 +540,22 @@ export class SchemaHelpers {
         [this.extRawValue]: true,
       };
     }
+
+    if (visited.has(value as object)) {
+      throw new Error(
+        'too much recursion. Please check document for recursion.',
+      );
+    }
+    visited.add(value as object);
+
     if (this.isJSONSchema(value)) {
       return value;
     }
     if (Array.isArray(value)) {
       return {
         type: 'array',
         // eslint-disable-next-line @typescript-eslint/no-unsafe-return
-        items: value.map((v) => this.jsonFieldToSchema(v)),
+        items: value.map((v) => this.jsonFieldToSchema(v, visited)),
         [this.extRenderAdditionalInfo]: false,
       };
     }
@@ -554,7 +564,7 @@ export class SchemaHelpers {
       // eslint-disable-next-line @typescript-eslint/no-unsafe-argument
       properties: Object.entries(value).reduce(
         (obj, [k, v]) => {
-          obj[k] = this.jsonFieldToSchema(v);
+          obj[k] = this.jsonFieldToSchema(v, visited);
           return obj;
         },
         {} as Record<string, unknown>,