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import type { EffectivePolicy } from '../../configuration/policy';
import { extractSimpleId } from '../../utils/idConversion';
import { ResponseLimitError } from '../../utils/bounded-json';
import {
assertWorkflowProject,
permitsDuoProject,
readDuoProject,
workflowProject,
UnverifiableDuoProjectError,
type DuoProject,
} from './access';
import { preview, isDuoChat } from './discovery';
import {
DETAILS,
HISTORY,
readWorkflow,
requestDuo,
workflowGid,
workflowPage,
type Workflow,
type Message,
} from './queries';
import type { BrowseDuoSessionsInput } from './schema';
export const WAITING = new Set([
'input_required',
'plan_approval_required',
'tool_call_approval_required',
]);
const TERMINAL = new Set(['finished', 'failed', 'stopped']);
export function statusCode(row: Workflow): string | null {
if (typeof row.statusName === 'string') return row.statusName;
return typeof row.status === 'string' ? row.status.toLowerCase() : null;
}
export function sessionMetadata(row: Workflow): Record<string, unknown> {
const status = statusCode(row);
let pollAfter: number | null = null;
if (status === 'created') pollAfter = 120;
else if (status === 'running') pollAfter = 30;
return {
workflow_id: extractSimpleId(row.id),
project_id: row.projectId === null ? null : extractSimpleId(row.projectId),
status,
status_label: row.humanStatus,
flow: row.workflowDefinition ?? null,
web_url: row.webUrl ?? null,
created_at: row.createdAt,
poll_after_seconds: pollAfter,
};
}
function listedSession(
row: Workflow,
selected: DuoProject | null,
policy: EffectivePolicy,
): boolean {
if (isDuoChat(row.workflowDefinition)) return false;
const id = row.projectId === null ? null : extractSimpleId(row.projectId);
if (selected && id !== selected.id) return false;
return !policy.operatorProjectIds || (id !== null && policy.operatorProjectIds.has(id));
}
async function listedProject(
row: Workflow,
projectReads: Map<string, Promise<DuoProject>>,
): Promise<DuoProject | null> {
try {
return await workflowProject(row, projectReads);
} catch (error) {
if (error instanceof UnverifiableDuoProjectError) return null;
throw error;
}
}
/** Bound simultaneous project responses, counting cache misses rather than session rows. */
async function listedProjects(
rows: Workflow[],
projectReads: Map<string, Promise<DuoProject>>,
): Promise<Array<DuoProject | null>> {
const projects: Array<DuoProject | null> = [];
const pending: Array<Promise<DuoProject | null>> = [];
let started = projectReads.size;
for (const row of rows) {
pending.push(listedProject(row, projectReads));
if (projectReads.size - started < 4) continue;
projects.push(...(await Promise.all(pending)));
pending.length = 0;
started = projectReads.size;
}
projects.push(...(await Promise.all(pending)));
return projects;
}
/** Metadata-only pagination: detailed messages from disallowed projects are never requested. */
export async function listDuoSessions(
input: Extract<BrowseDuoSessionsInput, { action: 'list' }>,
policy: EffectivePolicy,
): Promise<unknown> {
const selected = input.project_id === undefined ? null : await readDuoProject(input.project_id);
if (selected && !permitsDuoProject(selected, policy))
throw new Error('Duo project is outside the working scope');
const page = await workflowPage(input.first, input.after);
const sessions: Record<string, unknown>[] = [];
const result = {
sessions,
pageInfo: page.pageInfo,
filtered: true,
skipped_unverifiable_sessions: 0,
};
if (!policy.scopeEnforcer) {
for (const row of page.nodes)
if (listedSession(row, selected, policy)) sessions.push(sessionMetadata(row));
return result;
}
const projectReads = new Map<string, Promise<DuoProject>>();
if (selected) projectReads.set(selected.id, Promise.resolve(selected));
const rows = page.nodes.filter((row) => listedSession(row, selected, policy));
const projects = await listedProjects(rows, projectReads);
for (let index = 0; index < rows.length; index++) {
const project = projects[index];
if (!project) {
result.skipped_unverifiable_sessions++;
continue;
}
if (permitsDuoProject(project, policy)) sessions.push(sessionMetadata(rows[index]));
}
return result;
}
interface LinkConnection<T> {
nodes: Array<T | null>;
pageInfo: { hasNextPage: boolean };
}
interface ObjectLink {
id: string;
title: string;
webUrl: string;
}
interface Details extends Workflow {
latestCheckpoint?: { lastDuoMessage?: Message | null } | null;
mergeRequestLinks?: LinkConnection<{ mergeRequest: ObjectLink | null }> | null;
workItemLinks?: LinkConnection<{ workItem: ObjectLink | null }> | null;
noteLinks?: LinkConnection<{ note: { id: string; url: string; body: string } | null }> | null;
}
interface History extends Workflow {
latestCheckpoint: { duoMessages: Message[] } | null;
}
function agentMessage(
message: Message | null | undefined,
): message is Message & { content: string } {
return !!message?.content && (message.role === 'assistant' || message.messageType === 'agent');
}
function createdObjects(row: Details): Record<string, unknown> {
const connections = [row.mergeRequestLinks, row.workItemLinks, row.noteLinks];
return {
merge_requests:
row.mergeRequestLinks?.nodes.flatMap((link) =>
link?.mergeRequest ? [link.mergeRequest] : [],
) ?? null,
work_items:
row.workItemLinks?.nodes.flatMap((link) => (link?.workItem ? [link.workItem] : [])) ?? null,
notes:
row.noteLinks?.nodes.flatMap((link) =>
link?.note
? [{ id: link.note.id, url: link.note.url, body: preview(link.note.body, 160) }]
: [],
) ?? null,
limit: 20,
truncated: connections.some((connection) => connection?.pageInfo.hasNextPage),
};
}
async function latestAnswer(
row: Details,
): Promise<{ answer: ReturnType<typeof preview>; history: string }> {
const last = row.latestCheckpoint?.lastDuoMessage;
if (agentMessage(last)) return { answer: preview(last.content, 4000), history: 'available' };
const status = statusCode(row);
if (status === null || (!WAITING.has(status) && !TERMINAL.has(status)))
return { answer: preview(null, 4000), history: 'not_requested' };
if (!graphqlSupports('DuoWorkflowEvent', 'duoMessages'))
return { answer: preview(null, 4000), history: 'unsupported' };
try {
const result = await requestDuo<{ duoWorkflowWorkflows: { nodes: History[] } }>(HISTORY, {
id: workflowGid(row.id),
});
const workflow = result.duoWorkflowWorkflows.nodes.find((entry) => entry.id === row.id);
if (workflow?.projectId !== row.projectId) throw new Error('Duo provenance changed');
const messages = workflow.latestCheckpoint?.duoMessages;
if (!messages) return { answer: preview(null, 4000), history: 'missing_checkpoint' };
for (let index = messages.length - 1; index >= 0; index--)
if (agentMessage(messages[index]))
return { answer: preview(messages[index].content, 4000), history: 'available' };
return { answer: preview(null, 4000), history: 'no_agent_answer' };
} catch (error) {
return {
answer: preview(null, 4000),
history: error instanceof ResponseLimitError ? 'too_large' : 'unreadable',
};
}
}
export async function getDuoSession(id: string, policy: EffectivePolicy): Promise<unknown> {
const restricted = !!(policy.scopeEnforcer ?? policy.operatorProjectIds);
const targeted = graphqlSupports('Query', 'duoWorkflowWorkflows', 'workflowId');
const initial = restricted || !targeted ? await readWorkflow(id) : null;
if (initial) await assertWorkflowProject(initial, policy);
if (!targeted && initial !== null)
return { ...sessionMetadata(initial), details_available: false, history: 'unsupported' };
let row: Details;
try {
const result = await requestDuo<{ duoWorkflowWorkflows: { nodes: Details[] } }>(DETAILS, {
id: workflowGid(id),
});
const found = result.duoWorkflowWorkflows.nodes.find(
(entry) => extractSimpleId(entry.id) === extractSimpleId(id),
);
if (!found) throw new Error('Duo session is unavailable');
row = found;
} catch (error) {
const metadata = initial ?? (await readWorkflow(id));
await assertWorkflowProject(metadata, policy);
return {
...sessionMetadata(metadata),
details_available: false,
history: error instanceof ResponseLimitError ? 'too_large' : 'unreadable',
};
}
if (initial && initial.projectId !== row.projectId)
throw new Error('Duo session project changed during lookup');
await assertWorkflowProject(row, policy);
if (isDuoChat(row.workflowDefinition))
throw new Error('General Duo Chat is outside Duo session tools');
const answer = await latestAnswer(row);
const status = statusCode(row);
return {
...sessionMetadata(row),
details_available: true,
summary: preview(row.summary, 1000),
...answer,
created_objects: createdObjects(row),
pending_input:
status !== null && WAITING.has(status)
? {
state: status,
can_send: row.userPermissions?.resumeDuoWorkflow ?? null,
guidance:
'Send input only after the preceding CI job finishes. GitLab remains authoritative for authorization and concurrent state changes.',
}
: null,
};
}
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