make sure to rerender requests after attaching variable data (microsoft#221482)

* emit event (via the parent chat model)
* compute dataId considering the variable data

fyi @roblourens

Author: jrieken

src/vs/workbench/contrib/chat/common/chatModel.ts

@@ -542,13 +542,21 @@ export function isSerializableSessionData(obj: unknown): obj is ISerializableCha
 		);
 }
 
-export type IChatChangeEvent = IChatAddRequestEvent | IChatAddResponseEvent | IChatInitEvent | IChatRemoveRequestEvent;
+export type IChatChangeEvent =
+	| IChatInitEvent
+	| IChatAddRequestEvent | IChatChangedRequestEvent | IChatRemoveRequestEvent
+	| IChatAddResponseEvent;
 
 export interface IChatAddRequestEvent {
 	kind: 'addRequest';
 	request: IChatRequestModel;
 }
 
+export interface IChatChangedRequestEvent {
+	kind: 'changedRequest';
+	request: IChatRequestModel;
+}
+
 export interface IChatAddResponseEvent {
 	kind: 'addResponse';
 	response: IChatResponseModel;
@@ -832,6 +840,11 @@ export class ChatModel extends Disposable implements IChatModel {
 		return request;
 	}
 
+	updateRequest(request: ChatRequestModel, variableData: IChatRequestVariableData) {
+		request.variableData = variableData;
+		this._onDidChange.fire({ kind: 'changedRequest', request });
+	}
+
 	adoptRequest(request: ChatRequestModel): void {
 
 		// this doesn't use `removeRequest` because it must not dispose the request object

src/vs/workbench/contrib/chat/common/chatServiceImpl.ts

@@ -479,7 +479,7 @@ export class ChatService extends Disposable implements IChatService {
 					request = model.addRequest(parsedRequest, initVariableData, attempt, agent, agentSlashCommandPart?.command);
 					completeResponseCreated();
 					const variableData = await this.chatVariablesService.resolveVariables(parsedRequest, options?.attachedContext, model, progressCallback, token);
-					request.variableData = variableData;
+					model.updateRequest(request, variableData);
 
 					const promptTextResult = getPromptText(request.message);
 					const updatedVariableData = updateRanges(variableData, promptTextResult.diff); // TODO bit of a hack

src/vs/workbench/contrib/chat/common/chatViewModel.ts

@@ -18,6 +18,7 @@ import { IParsedChatRequest } from 'vs/workbench/contrib/chat/common/chatParserT
 import { ChatAgentVoteDirection, IChatContentReference, IChatFollowup, IChatProgressMessage, IChatResponseErrorDetails, IChatTask, IChatUsedContext } from 'vs/workbench/contrib/chat/common/chatService';
 import { countWords } from 'vs/workbench/contrib/chat/common/chatWordCounter';
 import { CodeBlockModelCollection } from './codeBlockModelCollection';
+import { hash } from 'vs/base/common/hash';
 
 export function isRequestVM(item: unknown): item is IChatRequestViewModel {
 	return !!item && typeof item === 'object' && 'message' in item;
@@ -335,7 +336,7 @@ export class ChatRequestViewModel implements IChatRequestViewModel {
 	}
 
 	get dataId() {
-		return this.id + `_${ChatModelInitState[this._model.session.initState]}`;
+		return this.id + `_${ChatModelInitState[this._model.session.initState]}_${hash(this.variables)}`;
 	}
 
 	get sessionId() {