fix: use JSON Pointer last element as ID for reply.channel and reply.messages[]

src/models/utils.ts

@@ -12,3 +12,21 @@ export type InferModelMetadata<T> = T extends BaseModel<infer _, infer M> ? M :
 export function createModel<T extends BaseModel>(Model: Constructor<T>, value: InferModelData<T>, meta: Omit<ModelMetadata, 'asyncapi'> & { asyncapi?: DetailedAsyncAPI } & InferModelMetadata<T>, parent?: BaseModel): T {
   return new Model(value, { ...meta, asyncapi: meta.asyncapi || parent?.meta().asyncapi });
 }
+
+export function objectIdFromJSONPointer(path: string, data: any): string {
+  if (typeof data === 'string') {
+    data = JSON.parse(data); 
+  }
+
+  if (!path.endsWith('/$ref')) path += '/$ref';
+
+  path = path.replace(/^\//, ''); // removing the leading slash
+  path.split('/').forEach((subpath) => {
+    const key = subpath.replace(/~1/, '/'); // recover escaped slashes
+    if (data[key] !== undefined) {
+      data = data[key];
+    }
+  });
+
+  return data.split('/').pop().replace(/~1/, '/');
+}

src/models/v3/operation-reply.ts

@@ -14,6 +14,8 @@ import type { ChannelInterface } from '../channel';
 
 import type { v3 } from '../../spec-types';
 
+import { objectIdFromJSONPointer } from '../utils';
+
 export class OperationReply extends BaseModel<v3.OperationReplyObject, { id?: string }> implements OperationReplyInterface {
   id(): string | undefined {
     return this._meta.id;
@@ -35,14 +37,14 @@ export class OperationReply extends BaseModel<v3.OperationReplyObject, { id?: st
 
   channel(): ChannelInterface | undefined {
     if (this._json.channel) {
-      return this.createModel(Channel, this._json.channel as v3.ChannelObject, { id: '', pointer: this.jsonPath('channel') });
+      return this.createModel(Channel, this._json.channel as v3.ChannelObject, { id: objectIdFromJSONPointer(this.jsonPath('channel'), this._meta.asyncapi.input), pointer: this.jsonPath('channel') });
     }
     return this._json.channel;
   }
   messages(): MessagesInterface {
-    return new Messages(
-      Object.entries(this._json.messages || {}).map(([messageName, message]) => {
-        return this.createModel(Message, message as v3.MessageObject, { id: messageName, pointer: this.jsonPath(`messages/${messageName}`) });
+    return new Messages(  
+      Object.entries(this._json.messages || {}).map(([i, message]) => {
+        return this.createModel(Message, message as v3.MessageObject, { id: objectIdFromJSONPointer(this.jsonPath(`messages/${i}`), this._meta.asyncapi.input), pointer: this.jsonPath(`messages/${i}`) });
       })
     );
   }

src/spec-types/v3.ts

@@ -143,7 +143,7 @@ export interface OperationTraitObject extends SpecificationExtensions {
 
 export interface OperationReplyObject extends SpecificationExtensions {
   channel?: ChannelObject | ReferenceObject;
-  messages?: MessagesObject;
+  messages?: Array<MessageObject | ReferenceObject>;
   address?: OperationReplyAddressObject | ReferenceObject;
 }
 

test/models/v3/operation-reply.spec.ts

@@ -64,20 +64,20 @@ describe('OperationReply model', function() {
 
   describe('.messages()', function() {
     it('should return collection of messages - single message', function() {
-      const d = new OperationReply({ messages: { someMessage: {} } });
+      const d = new OperationReply({ messages: [{}] });
       expect(d.messages()).toBeInstanceOf(Messages);
       expect(d.messages().all()).toHaveLength(1);
       expect(d.messages().all()[0]).toBeInstanceOf(Message);
     });
 
     it('should return collection of messages - more than one messages', function() {
-      const d = new OperationReply({ messages: { someMessage1: {}, someMessage2: {} } });
+      const d = new OperationReply({ messages: [{name: 'someMessage1'}, {name: 'someMessage2'}] });
       expect(d.messages()).toBeInstanceOf(Messages);
       expect(d.messages().all()).toHaveLength(2);
       expect(d.messages().all()[0]).toBeInstanceOf(Message);
-      expect(d.messages().all()[0].id()).toEqual('someMessage1');
+      expect(d.messages().all()[0].name()).toEqual('someMessage1');
       expect(d.messages().all()[1]).toBeInstanceOf(Message);
-      expect(d.messages().all()[1].id()).toEqual('someMessage2');
+      expect(d.messages().all()[1].name()).toEqual('someMessage2');
     });
 
     it('should return undefined if address is not present', function() {

test/resolver.spec.ts

@@ -1,7 +1,84 @@
-import { AsyncAPIDocumentV2 } from '../src/models';
+import { AsyncAPIDocumentV2, AsyncAPIDocumentV3 } from '../src/models';
 import { Parser } from '../src/parser';
 
 describe('custom resolver', function() {
+  it('Reply channel + messages[] Ids come from JSON Pointer', async function() {
+    const parser = new Parser();
+
+    const documentRaw = `{
+      "asyncapi": "3.0.0",
+      "info": {
+        "title": "Account Service",
+        "version": "1.0.0",
+        "description": "This service is in charge of processing user signups"
+      },
+      "channels": {
+        "user/signedup": {
+          "address": "user/signedup",
+          "messages": {
+            "subscribe.message": {
+              "$ref": "#/components/messages/UserSignedUp"
+            }
+          }
+        }
+      },
+      "operations": {
+        "user/signedup.subscribe": {
+          "action": "send",
+          "channel": {
+            "$ref": "#/channels/user~1signedup"
+          },
+          "messages": [
+            {
+              "$ref": "#/components/messages/UserSignedUp"
+            }
+          ],
+          "reply": {
+            "channel": {
+              "$ref": "#/channels/user~1signedup"
+            },
+            "messages": [
+              {
+                "$ref": "#/components/messages/UserSignedUp"
+              }
+            ]
+          }
+        }
+      },
+      "components": {
+        "messages": {
+          "UserSignedUp": {
+            "payload": {
+              "type": "object",
+              "properties": {
+                "displayName": {
+                  "type": "string",
+                  "description": "Name of the user"
+                },
+                "email": {
+                  "type": "string",
+                  "format": "email",
+                  "description": "Email of the user"
+                }
+              }
+            }
+          }
+        }
+      }
+    }`;
+    const { document } = await parser.parse(documentRaw);
+
+    expect(document).toBeInstanceOf(AsyncAPIDocumentV3);
+
+    const operation = document?.operations().get('user/signedup.subscribe');
+    const replyObj = operation?.reply();
+    expect(replyObj?.channel()?.id()).toEqual('user/signedup');
+
+    const message = replyObj?.messages()?.get('UserSignedUp');
+    expect(message).toBeDefined();
+    expect(message?.id()).toEqual('UserSignedUp');
+  });
+
   it('should resolve document references', async function() {
     const parser = new Parser();