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652/*---------------------------------------------------------------------------------------------
* Copyright (c) Microsoft Corporation. All rights reserved.
* Licensed under the MIT License. See License.txt in the project root for license information.
*--------------------------------------------------------------------------------------------*/
import { coalesce } from '../../../../../base/common/arrays.js';
import { ThrottledDelayer } from '../../../../../base/common/async.js';
import { CancellationToken } from '../../../../../base/common/cancellation.js';
import { Codicon } from '../../../../../base/common/codicons.js';
import { Emitter, Event } from '../../../../../base/common/event.js';
import { IMarkdownString } from '../../../../../base/common/htmlContent.js';
import { Disposable } from '../../../../../base/common/lifecycle.js';
import { ResourceMap } from '../../../../../base/common/map.js';
import { MarshalledId } from '../../../../../base/common/marshallingIds.js';
import { ThemeIcon } from '../../../../../base/common/themables.js';
import { URI, UriComponents } from '../../../../../base/common/uri.js';
import { IInstantiationService } from '../../../../../platform/instantiation/common/instantiation.js';
import { ILogService } from '../../../../../platform/log/common/log.js';
import { IStorageService, StorageScope, StorageTarget } from '../../../../../platform/storage/common/storage.js';
import { ILifecycleService } from '../../../../services/lifecycle/common/lifecycle.js';
import { ChatSessionStatus as AgentSessionStatus, IChatSessionFileChange, IChatSessionItem, IChatSessionsExtensionPoint, IChatSessionsService, isSessionInProgressStatus } from '../../common/chatSessionsService.js';
import { AgentSessionProviders, getAgentSessionProvider, getAgentSessionProviderIcon, getAgentSessionProviderName } from './agentSessions.js';
//#region Interfaces, Types
export { ChatSessionStatus as AgentSessionStatus, isSessionInProgressStatus } from '../../common/chatSessionsService.js';
export interface IAgentSessionsModel {
readonly onWillResolve: Event<void>;
readonly onDidResolve: Event<void>;
readonly onDidChangeSessions: Event<void>;
readonly sessions: IAgentSession[];
getSession(resource: URI): IAgentSession | undefined;
resolve(provider: string | string[] | undefined): Promise<void>;
}
interface IAgentSessionData extends Omit<IChatSessionItem, 'archived' | 'iconPath'> {
readonly providerType: string;
readonly providerLabel: string;
readonly resource: URI;
readonly status: AgentSessionStatus;
readonly tooltip?: string | IMarkdownString;
readonly label: string;
readonly description?: string | IMarkdownString;
readonly badge?: string | IMarkdownString;
readonly icon: ThemeIcon;
readonly timing: IChatSessionItem['timing'] & {
readonly inProgressTime?: number;
readonly finishedOrFailedTime?: number;
};
readonly changes?: IChatSessionItem['changes'];
}
/**
* Checks if the provided changes object represents valid diff information.
*/
export function hasValidDiff(changes: IAgentSession['changes']): boolean {
if (!changes) {
return false;
}
if (changes instanceof Array) {
return changes.length > 0;
}
return changes.files > 0 || changes.insertions > 0 || changes.deletions > 0;
}
/**
* Gets a summary of agent session changes, converting from array format to object format if needed.
*/
export function getAgentChangesSummary(changes: IAgentSession['changes']) {
if (!changes) {
return;
}
if (!(changes instanceof Array)) {
return changes;
}
let insertions = 0;
let deletions = 0;
for (const change of changes) {
insertions += change.insertions;
deletions += change.deletions;
}
return { files: changes.length, insertions, deletions };
}
export interface IAgentSession extends IAgentSessionData {
isArchived(): boolean;
setArchived(archived: boolean): void;
isRead(): boolean;
setRead(read: boolean): void;
}
interface IInternalAgentSessionData extends IAgentSessionData {
/**
* The `archived` property is provided by the session provider
* and will be used as the initial value if the user has not
* changed the archived state for the session previously. It
* is kept internal to not expose it publicly. Use `isArchived()`
* and `setArchived()` methods instead.
*/
readonly archived: boolean | undefined;
}
interface IInternalAgentSession extends IAgentSession, IInternalAgentSessionData { }
export function isLocalAgentSessionItem(session: IAgentSession): boolean {
return session.providerType === AgentSessionProviders.Local;
}
export function isAgentSession(obj: unknown): obj is IAgentSession {
const session = obj as IAgentSession | undefined;
return URI.isUri(session?.resource) && typeof session.setArchived === 'function' && typeof session.setRead === 'function';
}
export function isAgentSessionsModel(obj: unknown): obj is IAgentSessionsModel {
const sessionsModel = obj as IAgentSessionsModel | undefined;
return Array.isArray(sessionsModel?.sessions) && typeof sessionsModel?.getSession === 'function';
}
interface IAgentSessionState {
readonly archived: boolean;
readonly read: number /* last date turned read */;
}
export const enum AgentSessionSection {
InProgress = 'inProgress',
Today = 'today',
Yesterday = 'yesterday',
Week = 'week',
Older = 'older',
Archived = 'archived',
}
export interface IAgentSessionSection {
readonly section: AgentSessionSection;
readonly label: string;
readonly sessions: IAgentSession[];
}
export function isAgentSessionSection(obj: unknown): obj is IAgentSessionSection {
const candidate = obj as IAgentSessionSection;
return typeof candidate.section === 'string' && Array.isArray(candidate.sessions);
}
export interface IMarshalledAgentSessionContext {
readonly $mid: MarshalledId.AgentSessionContext;
readonly session: IAgentSession;
readonly sessions: IAgentSession[]; // support for multi-selection
}
export function isMarshalledAgentSessionContext(thing: unknown): thing is IMarshalledAgentSessionContext {
if (typeof thing === 'object' && thing !== null) {
const candidate = thing as IMarshalledAgentSessionContext;
return candidate.$mid === MarshalledId.AgentSessionContext && typeof candidate.session === 'object' && candidate.session !== null;
}
return false;
}
//#endregion
export class AgentSessionsModel extends Disposable implements IAgentSessionsModel {
private readonly _onWillResolve = this._register(new Emitter<void>());
readonly onWillResolve = this._onWillResolve.event;
private readonly _onDidResolve = this._register(new Emitter<void>());
readonly onDidResolve = this._onDidResolve.event;
private readonly _onDidChangeSessions = this._register(new Emitter<void>());
readonly onDidChangeSessions = this._onDidChangeSessions.event;
private _sessions: ResourceMap<IInternalAgentSession>;
get sessions(): IAgentSession[] { return Array.from(this._sessions.values()); }
private readonly resolver = this._register(new ThrottledDelayer<void>(300));
private readonly providersToResolve = new Set<string | undefined>();
private readonly mapSessionToState = new ResourceMap<{
status: AgentSessionStatus;
inProgressTime?: number;
finishedOrFailedTime?: number;
}>();
private readonly cache: AgentSessionsCache;
constructor(
@IChatSessionsService private readonly chatSessionsService: IChatSessionsService,
@ILifecycleService private readonly lifecycleService: ILifecycleService,
@IInstantiationService private readonly instantiationService: IInstantiationService,
@IStorageService private readonly storageService: IStorageService,
@ILogService private readonly logService: ILogService,
) {
super();
this._sessions = new ResourceMap<IInternalAgentSession>();
this.cache = this.instantiationService.createInstance(AgentSessionsCache);
for (const data of this.cache.loadCachedSessions()) {
const session = this.toAgentSession(data);
this._sessions.set(session.resource, session);
}
this.sessionStates = this.cache.loadSessionStates();
this.registerListeners();
}
private registerListeners(): void {
// Sessions changes
this._register(this.chatSessionsService.onDidChangeItemsProviders(({ chatSessionType: provider }) => this.resolve(provider)));
this._register(this.chatSessionsService.onDidChangeAvailability(() => this.resolve(undefined)));
this._register(this.chatSessionsService.onDidChangeSessionItems(provider => this.resolve(provider)));
// State
this._register(this.storageService.onWillSaveState(() => {
this.cache.saveCachedSessions(Array.from(this._sessions.values()));
this.cache.saveSessionStates(this.sessionStates);
}));
}
getSession(resource: URI): IAgentSession | undefined {
return this._sessions.get(resource);
}
async resolve(provider: string | string[] | undefined): Promise<void> {
if (Array.isArray(provider)) {
for (const p of provider) {
this.providersToResolve.add(p);
}
} else {
this.providersToResolve.add(provider);
}
return this.resolver.trigger(async token => {
if (token.isCancellationRequested || this.lifecycleService.willShutdown) {
return;
}
try {
this._onWillResolve.fire();
return await this.doResolve(token);
} finally {
this._onDidResolve.fire();
}
});
}
private async doResolve(token: CancellationToken): Promise<void> {
const providersToResolve = Array.from(this.providersToResolve);
this.providersToResolve.clear();
this.logService.trace(`[agent sessions] Resolving agent sessions for providers: ${providersToResolve.map(p => p ?? 'all').join(', ')}`);
const mapSessionContributionToType = new Map<string, IChatSessionsExtensionPoint>();
for (const contribution of this.chatSessionsService.getAllChatSessionContributions()) {
mapSessionContributionToType.set(contribution.type, contribution);
}
const providerFilter = providersToResolve.includes(undefined)
? undefined
: coalesce(providersToResolve);
const providerResults = await this.chatSessionsService.getChatSessionItems(providerFilter, token);
const resolvedProviders = new Set<string>();
const sessions = new ResourceMap<IInternalAgentSession>();
for (const { chatSessionType, items: providerSessions } of providerResults) {
this.logService.trace(`[agent sessions] Resolved ${providerSessions.length} agent sessions for provider ${chatSessionType}`);
resolvedProviders.add(chatSessionType);
if (token.isCancellationRequested) {
return;
}
for (const session of providerSessions) {
// Icon + Label
let icon: ThemeIcon;
let providerLabel: string;
const agentSessionProvider = getAgentSessionProvider(chatSessionType);
if (agentSessionProvider !== undefined) {
providerLabel = getAgentSessionProviderName(agentSessionProvider);
icon = getAgentSessionProviderIcon(agentSessionProvider);
} else {
providerLabel = mapSessionContributionToType.get(chatSessionType)?.name ?? chatSessionType;
icon = session.iconPath ?? Codicon.terminal;
}
// State + Timings
// TODO@bpasero this is a workaround for not having precise timing info in sessions
// yet: we only track the time when a transition changes because then we can say with
// confidence that the time is correct by assuming `Date.now()`. A better approach would
// be to get all this information directly from the session.
const status = session.status ?? AgentSessionStatus.Completed;
const state = this.mapSessionToState.get(session.resource);
let inProgressTime = state?.inProgressTime;
let finishedOrFailedTime = state?.finishedOrFailedTime;
// No previous state, just add it
if (!state) {
const isInProgress = isSessionInProgressStatus(status);
let inProgressTime: number | undefined;
if (isInProgress) {
inProgressTime = Date.now();
this.logService.trace(`[agent sessions] Setting inProgressTime for session ${session.resource.toString()} to ${inProgressTime} (status: ${status})`);
}
this.mapSessionToState.set(session.resource, {
status,
inProgressTime,
});
}
// State changed, update it
else if (status !== state.status) {
inProgressTime = isSessionInProgressStatus(status) ? Date.now() : state.inProgressTime;
finishedOrFailedTime = !isSessionInProgressStatus(status) ? Date.now() : state.finishedOrFailedTime;
this.mapSessionToState.set(session.resource, {
status,
inProgressTime,
finishedOrFailedTime
});
}
const changes = session.changes;
const normalizedChanges = changes && !(changes instanceof Array)
? { files: changes.files, insertions: changes.insertions, deletions: changes.deletions }
: changes;
// Times: it is important to always provide timing information to track
// unread/read state for example.
// If somehow the provider does not provide any, fallback to last known
let created = session.timing.created;
let lastRequestStarted = session.timing.lastRequestStarted;
let lastRequestEnded = session.timing.lastRequestEnded;
if (!created || !lastRequestEnded) {
const existing = this._sessions.get(session.resource);
if (!created && existing?.timing.created) {
created = existing.timing.created;
}
if (!lastRequestEnded && existing?.timing.lastRequestEnded) {
lastRequestEnded = existing.timing.lastRequestEnded;
}
if (!lastRequestStarted && existing?.timing.lastRequestStarted) {
lastRequestStarted = existing.timing.lastRequestStarted;
}
}
this.logService.trace(`[agent sessions] Resolved session ${session.resource.toString()} with timings: created=${created}, lastRequestStarted=${lastRequestStarted}, lastRequestEnded=${lastRequestEnded}`);
sessions.set(session.resource, this.toAgentSession({
providerType: chatSessionType,
providerLabel,
resource: session.resource,
label: session.label.split('\n')[0], // protect against weird multi-line labels that break our layout
description: session.description,
icon,
badge: session.badge,
tooltip: session.tooltip,
status,
archived: session.archived,
timing: {
created,
lastRequestStarted,
lastRequestEnded,
inProgressTime,
finishedOrFailedTime
},
changes: normalizedChanges,
}));
}
}
for (const [, session] of this._sessions) {
if (!resolvedProviders.has(session.providerType)) {
sessions.set(session.resource, session); // fill in existing sessions for providers that did not resolve
}
}
this._sessions = sessions;
this.logService.trace(`[agent sessions] Total resolved agent sessions:`, Array.from(this._sessions.values()));
for (const [resource] of this.mapSessionToState) {
if (!sessions.has(resource)) {
this.mapSessionToState.delete(resource); // clean up tracking for removed sessions
}
}
for (const [resource] of this.sessionStates) {
if (!sessions.has(resource)) {
this.sessionStates.delete(resource); // clean up states for removed sessions
}
}
this._onDidChangeSessions.fire();
}
private toAgentSession(data: IInternalAgentSessionData): IInternalAgentSession {
return {
...data,
isArchived: () => this.isArchived(data),
setArchived: (archived: boolean) => this.setArchived(data, archived),
isRead: () => this.isRead(data),
setRead: (read: boolean) => this.setRead(data, read),
};
}
//#region States
// In order to reduce the amount of unread sessions a user will
// see after updating to 1.107, we specify a fixed date that a
// session needs to be created after to be considered unread unless
// the user has explicitly marked it as read.
private static readonly READ_STATE_INITIAL_DATE = Date.UTC(2025, 11 /* December */, 8);
private readonly sessionStates: ResourceMap<IAgentSessionState>;
private isArchived(session: IInternalAgentSessionData): boolean {
return this.sessionStates.get(session.resource)?.archived ?? Boolean(session.archived);
}
private setArchived(session: IInternalAgentSessionData, archived: boolean): void {
if (archived) {
this.setRead(session, true); // mark as read when archiving
}
if (archived === this.isArchived(session)) {
return; // no change
}
const state = this.sessionStates.get(session.resource) ?? { archived: false, read: 0 };
this.sessionStates.set(session.resource, { ...state, archived });
this._onDidChangeSessions.fire();
}
private isRead(session: IInternalAgentSessionData): boolean {
if (this.isArchived(session)) {
return true; // archived sessions are always read
}
const readDate = this.sessionStates.get(session.resource)?.read;
return (readDate ?? AgentSessionsModel.READ_STATE_INITIAL_DATE) >= (session.timing.lastRequestEnded ?? session.timing.lastRequestStarted ?? session.timing.created);
}
private setRead(session: IInternalAgentSessionData, read: boolean): void {
if (read === this.isRead(session)) {
return; // no change
}
const state = this.sessionStates.get(session.resource) ?? { archived: false, read: 0 };
this.sessionStates.set(session.resource, { ...state, read: read ? Date.now() : 0 });
this._onDidChangeSessions.fire();
}
//#endregion
}
//#region Sessions Cache
interface ISerializedAgentSession {
readonly providerType: string;
readonly providerLabel: string;
readonly resource: UriComponents /* old shape */ | string /* new shape that is more compact */;
readonly status: AgentSessionStatus;
readonly tooltip?: string | IMarkdownString;
readonly label: string;
readonly description?: string | IMarkdownString;
readonly badge?: string | IMarkdownString;
readonly icon: string;
readonly archived: boolean | undefined;
readonly timing: {
readonly created: number;
readonly lastRequestStarted?: number;
readonly lastRequestEnded?: number;
// Old format for backward compatibility when reading (TODO@bpasero remove eventually)
readonly startTime?: number;
readonly endTime?: number;
};
readonly changes?: readonly IChatSessionFileChange[] | {
readonly files: number;
readonly insertions: number;
readonly deletions: number;
};
}
interface ISerializedAgentSessionState extends IAgentSessionState {
readonly resource: UriComponents /* old shape */ | string /* new shape that is more compact */;
}
class AgentSessionsCache {
private static readonly SESSIONS_STORAGE_KEY = 'agentSessions.model.cache';
private static readonly STATE_STORAGE_KEY = 'agentSessions.state.cache';
constructor(
@IStorageService private readonly storageService: IStorageService
) { }
//#region Sessions
saveCachedSessions(sessions: IInternalAgentSessionData[]): void {
const serialized: ISerializedAgentSession[] = sessions.map(session => ({
providerType: session.providerType,
providerLabel: session.providerLabel,
resource: session.resource.toString(),
icon: session.icon.id,
label: session.label,
description: session.description,
badge: session.badge,
tooltip: session.tooltip,
status: session.status,
archived: session.archived,
timing: {
created: session.timing.created,
lastRequestStarted: session.timing.lastRequestStarted,
lastRequestEnded: session.timing.lastRequestEnded,
},
changes: session.changes,
} satisfies ISerializedAgentSession));
this.storageService.store(AgentSessionsCache.SESSIONS_STORAGE_KEY, JSON.stringify(serialized), StorageScope.WORKSPACE, StorageTarget.MACHINE);
}
loadCachedSessions(): IInternalAgentSessionData[] {
const sessionsCache = this.storageService.get(AgentSessionsCache.SESSIONS_STORAGE_KEY, StorageScope.WORKSPACE);
if (!sessionsCache) {
return [];
}
try {
const cached = JSON.parse(sessionsCache) as ISerializedAgentSession[];
return cached.map((session): IInternalAgentSessionData => ({
providerType: session.providerType,
providerLabel: session.providerLabel,
resource: typeof session.resource === 'string' ? URI.parse(session.resource) : URI.revive(session.resource),
icon: ThemeIcon.fromId(session.icon),
label: session.label,
description: session.description,
badge: session.badge,
tooltip: session.tooltip,
status: session.status,
archived: session.archived,
timing: {
// Support loading both new and old cache formats (TODO@bpasero remove old format support after some time)
created: session.timing.created ?? session.timing.startTime ?? 0,
lastRequestStarted: session.timing.lastRequestStarted ?? session.timing.startTime,
lastRequestEnded: session.timing.lastRequestEnded ?? session.timing.endTime,
},
changes: Array.isArray(session.changes) ? session.changes.map((change: IChatSessionFileChange) => ({
modifiedUri: URI.revive(change.modifiedUri),
originalUri: change.originalUri ? URI.revive(change.originalUri) : undefined,
insertions: change.insertions,
deletions: change.deletions,
})) : session.changes,
}));
} catch {
return []; // invalid data in storage, fallback to empty sessions list
}
}
//#endregion
//#region States
saveSessionStates(states: ResourceMap<IAgentSessionState>): void {
const serialized: ISerializedAgentSessionState[] = Array.from(states.entries()).map(([resource, state]) => ({
resource: resource.toString(),
archived: state.archived,
read: state.read
}));
this.storageService.store(AgentSessionsCache.STATE_STORAGE_KEY, JSON.stringify(serialized), StorageScope.WORKSPACE, StorageTarget.MACHINE);
}
loadSessionStates(): ResourceMap<IAgentSessionState> {
const states = new ResourceMap<IAgentSessionState>();
const statesCache = this.storageService.get(AgentSessionsCache.STATE_STORAGE_KEY, StorageScope.WORKSPACE);
if (!statesCache) {
return states;
}
try {
const cached = JSON.parse(statesCache) as ISerializedAgentSessionState[];
for (const entry of cached) {
states.set(typeof entry.resource === 'string' ? URI.parse(entry.resource) : URI.revive(entry.resource), {
archived: entry.archived,
read: entry.read
});
}
} catch {
// invalid data in storage, fallback to empty states
}
return states;
}
//#endregion
}
//#endregion