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* @module parliamentary-data/mcp-retry-queue
* @description File-backed deferred retry queue for MCP indexing/content gaps.
*/
import fs from 'node:fs';
import path from 'node:path';
import { fileURLToPath } from 'node:url';
import type { FetchVotingFilters, MCPCoverageState, MCPToolInvocationDiagnostic } from '../types/mcp.js';
import type { MCPClient } from '../mcp-client/client.js';
const __dirname = path.dirname(fileURLToPath(import.meta.url));
const REPO_ROOT = path.resolve(__dirname, '..', '..');
export const MCP_RETRY_QUEUE_SCHEMA = 'riksdagsmonitor-mcp-retry-queue/1.0';
export const DEFAULT_MCP_RETRY_QUEUE_PATH = path.join(REPO_ROOT, 'data', 'mcp-retry-queue.json');
const DEFAULT_EXPIRY_DAYS = 7;
export interface MCPRetryQueueEntry {
resourceType: 'document_fulltext' | 'voteringar_search';
resourceId: string;
tool: string;
docType?: string | null;
coverageState: MCPCoverageState;
requestedAt: string;
expiresAt: string;
attemptCount: number;
params: Record<string, unknown>;
reason?: string;
lastAttemptAt?: string;
}
export interface MCPRetryQueueFile {
schema: string;
updatedAt: string;
entries: MCPRetryQueueEntry[];
}
export interface MCPRetryDrainResult {
queue: MCPRetryQueueFile;
processed: number;
resolved: number;
retained: number;
expired: number;
resolvedDocuments: Record<string, Record<string, unknown>>;
/**
* Voting rows recovered from previously-deferred voteringar searches,
* keyed by the queue entry's `resourceId` (the exact query payload).
* Surfaced so callers can re-inject the rows into the run output even if
* the original query is no longer selected by the current date/filter.
*/
resolvedVoteringar: Record<string, unknown[]>;
diagnostics: MCPToolInvocationDiagnostic[];
}
function emptyQueue(initialTimestamp = new Date(0).toISOString()): MCPRetryQueueFile {
return {
schema: MCP_RETRY_QUEUE_SCHEMA,
updatedAt: initialTimestamp,
entries: [],
};
}
export function loadMcpRetryQueue(
queuePath: string = DEFAULT_MCP_RETRY_QUEUE_PATH,
): MCPRetryQueueFile {
if (!fs.existsSync(queuePath)) return emptyQueue();
try {
const parsed = JSON.parse(fs.readFileSync(queuePath, 'utf8')) as Partial<MCPRetryQueueFile>;
return {
schema: parsed.schema ?? MCP_RETRY_QUEUE_SCHEMA,
updatedAt: parsed.updatedAt ?? new Date(0).toISOString(),
entries: Array.isArray(parsed.entries) ? parsed.entries as MCPRetryQueueEntry[] : [],
};
} catch {
return emptyQueue();
}
}
export function saveMcpRetryQueue(
queue: MCPRetryQueueFile,
queuePath: string = DEFAULT_MCP_RETRY_QUEUE_PATH,
): void {
fs.mkdirSync(path.dirname(queuePath), { recursive: true });
fs.writeFileSync(queuePath, JSON.stringify(queue, null, 2) + '\n', 'utf8');
}
export function createRetryQueueEntry(options: {
resourceType: MCPRetryQueueEntry['resourceType'];
resourceId: string;
tool: string;
coverageState: MCPCoverageState;
params: Record<string, unknown>;
docType?: string | null;
reason?: string;
requestedAt?: string;
expiresInDays?: number;
}): MCPRetryQueueEntry {
const requestedAt = options.requestedAt ?? new Date().toISOString();
const expiresAt = new Date(
new Date(requestedAt).getTime() + ((options.expiresInDays ?? DEFAULT_EXPIRY_DAYS) * 86400000),
).toISOString();
return {
resourceType: options.resourceType,
resourceId: options.resourceId,
tool: options.tool,
docType: options.docType ?? null,
coverageState: options.coverageState,
requestedAt,
expiresAt,
attemptCount: 0,
params: { ...options.params },
...(options.reason ? { reason: options.reason } : {}),
};
}
export function enqueueRetryEntries(
entries: MCPRetryQueueEntry[],
queuePath: string = DEFAULT_MCP_RETRY_QUEUE_PATH,
): MCPRetryQueueFile {
const queue = loadMcpRetryQueue(queuePath);
const deduped = new Map<string, MCPRetryQueueEntry>();
for (const existing of queue.entries) {
deduped.set(`${existing.resourceType}:${existing.resourceId}`, existing);
}
for (const entry of entries) {
const key = `${entry.resourceType}:${entry.resourceId}`;
const previous = deduped.get(key);
deduped.set(key, previous
? {
...previous,
...entry,
attemptCount: previous.attemptCount,
requestedAt: previous.requestedAt,
expiresAt: previous.expiresAt,
}
: entry);
}
const updated: MCPRetryQueueFile = {
schema: MCP_RETRY_QUEUE_SCHEMA,
updatedAt: new Date().toISOString(),
entries: [...deduped.values()].sort((a, b) => a.resourceId.localeCompare(b.resourceId)),
};
saveMcpRetryQueue(updated, queuePath);
return updated;
}
export async function drainMcpRetryQueue(
client: MCPClient,
options: {
docType?: string | null;
queuePath?: string;
now?: Date;
maxEntries?: number;
} = {},
): Promise<MCPRetryDrainResult> {
const queuePath = options.queuePath ?? DEFAULT_MCP_RETRY_QUEUE_PATH;
const now = options.now ?? new Date();
const queue = loadMcpRetryQueue(queuePath);
const remaining: MCPRetryQueueEntry[] = [];
const resolvedDocuments: Record<string, Record<string, unknown>> = {};
const resolvedVoteringar: Record<string, unknown[]> = {};
const diagnostics: MCPToolInvocationDiagnostic[] = [];
const originalEntryCount = queue.entries.length;
let processed = 0;
let resolved = 0;
let retained = 0;
let expired = 0;
for (const entry of queue.entries) {
Iif (options.docType && entry.docType && entry.docType !== options.docType) {
remaining.push(entry);
continue;
}
Iif (new Date(entry.expiresAt).getTime() < now.getTime()) {
expired++;
continue;
}
Iif (options.maxEntries && processed >= options.maxEntries) {
remaining.push(entry);
continue;
}
processed++;
const lastAttemptAt = now.toISOString();
Eif (entry.resourceType === 'document_fulltext') {
try {
const result = await client.fetchDocumentDetailsWithCoverage(
entry.resourceId,
true,
{
requestedDate: (entry.params['requestedDate'] as string | undefined) ?? null,
retrieval: 'retry_queue',
},
);
diagnostics.push({
tool: entry.tool,
query: { ...entry.params, dok_id: entry.resourceId, include_full_text: true },
resultCount: result.resultCount,
coverageState: result.coverageState,
provenance: result.provenance,
notes: entry.reason,
});
Eif (result.coverageState === 'full_text') {
resolved++;
resolvedDocuments[entry.resourceId] = result.document;
continue;
}
remaining.push({
...entry,
attemptCount: entry.attemptCount + 1,
coverageState: result.coverageState,
reason: entry.reason ?? `Deferred ${entry.tool} retry still ${result.coverageState}`,
lastAttemptAt,
});
retained++;
} catch (drainErr) {
const errMessage = drainErr instanceof Error ? drainErr.message : String(drainErr);
console.warn(
`[mcp-retry-queue] Document retry failed for ${entry.resourceId}:`,
errMessage,
);
// Emit a `fetch_error` diagnostic so the manifest's
// `## MCP Query Diagnostics` section exposes the exact failed
// retry — without this the failure disappears into the aggregate
// retained counter.
diagnostics.push({
tool: entry.tool,
query: { ...entry.params, dok_id: entry.resourceId, include_full_text: true },
resultCount: 0,
coverageState: 'fetch_error',
provenance: {
provider: 'riksdag-regering',
endpoint: client.baseURL,
tool: entry.tool,
query: { ...entry.params, dok_id: entry.resourceId, include_full_text: true },
resultCount: 0,
coverageState: 'fetch_error',
retrieval: 'retry_queue',
retrievedAt: now.toISOString(),
},
notes: `Retry failed: ${errMessage}`,
});
remaining.push({
...entry,
attemptCount: entry.attemptCount + 1,
coverageState: 'fetch_error',
reason: `Retry failed: ${errMessage}`,
lastAttemptAt,
});
retained++;
}
continue;
}
const votingParams = entry.params;
if (typeof votingParams !== 'object' || votingParams === null) {
remaining.push({
...entry,
attemptCount: entry.attemptCount + 1,
reason: 'retry queue entry has invalid voting params payload',
lastAttemptAt,
});
retained++;
continue;
}
try {
const votingResult = await client.fetchVotingRecordsWithDiagnostics(
votingParams as FetchVotingFilters,
);
diagnostics.push({
tool: entry.tool,
query: { ...(entry.params as Record<string, unknown>) },
resultCount: votingResult.resultCount,
coverageState: votingResult.coverageState,
provenance: votingResult.provenance,
notes: entry.reason,
...(votingResult.signal ? { signal: votingResult.signal } : {}),
});
Iif (votingResult.resultCount > 0) {
resolved++;
// Persist the recovered items so the caller can re-inject them into
// the run output even if the original query is no longer part of
// the current download selection.
if (Array.isArray(votingResult.items)) {
resolvedVoteringar[entry.resourceId] = votingResult.items as unknown[];
}
continue;
}
remaining.push({
...entry,
attemptCount: entry.attemptCount + 1,
coverageState: votingResult.coverageState,
reason: votingResult.signal?.message ?? entry.reason,
lastAttemptAt,
});
retained++;
} catch (drainErr) {
const errMessage = drainErr instanceof Error ? drainErr.message : String(drainErr);
console.warn(
`[mcp-retry-queue] Voting retry failed for ${entry.resourceId}:`,
errMessage,
);
// Surface the failed voteringar retry as a `fetch_error` diagnostic so
// the manifest preserves the exact query/error rather than silently
// incrementing the retained counter.
diagnostics.push({
tool: entry.tool,
query: { ...(entry.params as Record<string, unknown>) },
resultCount: 0,
coverageState: 'fetch_error',
provenance: {
provider: 'riksdag-regering',
endpoint: client.baseURL,
tool: entry.tool,
query: { ...(entry.params as Record<string, unknown>) },
resultCount: 0,
coverageState: 'fetch_error',
retrieval: 'retry_queue',
retrievedAt: now.toISOString(),
},
notes: `Retry failed: ${errMessage}`,
});
remaining.push({
...entry,
attemptCount: entry.attemptCount + 1,
coverageState: 'fetch_error',
reason: `Retry failed: ${errMessage}`,
lastAttemptAt,
});
retained++;
}
}
const updatedQueue: MCPRetryQueueFile = {
schema: MCP_RETRY_QUEUE_SCHEMA,
updatedAt: now.toISOString(),
entries: remaining,
};
// Avoid touching the queue file when the queue was already empty AND we
// had nothing to process. Without this guard, every news workflow would
// dirty `data/mcp-retry-queue.json` with a fresh `updatedAt` even when no
// retry work occurred, producing noisy PR diffs and merge conflicts.
const hadWork = originalEntryCount > 0 || processed > 0 || expired > 0 || remaining.length > 0;
if (hadWork) {
saveMcpRetryQueue(updatedQueue, queuePath);
}
return {
queue: updatedQueue,
processed,
resolved,
retained,
expired,
resolvedDocuments,
resolvedVoteringar,
diagnostics,
};
}
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