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// SPDX-License-Identifier: Apache-2.0
/**
* @module Generators/Pipeline/FetchStage
* @description MCP data-fetching pipeline stage with circuit breaker protection.
*
* MCP-facing functions accept an explicit `client` argument instead of reading
* module-level state, making them straightforward to unit-test with a mock
* client. The {@link loadFeedDataFromFile} and {@link loadEPFeedDataFromFile}
* helpers introduce filesystem I/O to load pre-fetched feed JSON produced by
* agentic workflows.
*
* The {@link CircuitBreaker} prevents cascading failures when the MCP server
* is degraded: after {@link CircuitBreakerOptions.failureThreshold} consecutive
* errors the circuit opens and subsequent calls short-circuit immediately.
*/
import fs from 'fs';
import type { EuropeanParliamentMCPClient } from '../../mcp/ep-mcp-client.js';
import { getEPMCPClient } from '../../mcp/ep-mcp-client.js';
import type {
WeekAheadData,
DateRange,
CommitteeData,
MCPToolResult,
VotingRecord,
VotingPattern,
VotingAnomaly,
MotionsQuestion,
LegislativeDocument,
AdoptedTextFeedItem,
EventFeedItem,
ProcedureFeedItem,
MEPFeedItem,
DocumentFeedItem,
QuestionFeedItem,
DeclarationFeedItem,
CorporateBodyFeedItem,
BreakingNewsFeedData,
EPFeedData,
FeedTimeframe,
} from '../../types/index.js';
import {
parsePlenarySessions,
parseCommitteeMeetings,
parseLegislativeDocuments,
parseLegislativePipeline,
parseParliamentaryQuestions,
parseEPEvents,
PLACEHOLDER_EVENTS,
} from '../week-ahead-content.js';
import { applyCommitteeInfo, applyDocuments, applyEffectiveness } from '../committee-helpers.js';
import { getMotionsFallbackData } from '../motions-content.js';
import { escapeHTML } from '../../utils/file-utils.js';
import type { PipelineData } from '../propositions-content.js';
// ─── Shared string constants ─────────────────────────────────────────────────
/** Log prefix for MCP fetch operations */
const MCP_FETCH_PREFIX = ' 📡';
/** Warning prefix for MCP failures */
const WARN_PREFIX = ' ⚠️';
/** Info prefix for fallback messages */
const INFO_PREFIX = ' ℹ️';
// ─── Circuit Breaker ─────────────────────────────────────────────────────────
/** Possible circuit breaker states */
export type CircuitState = 'CLOSED' | 'OPEN' | 'HALF_OPEN';
/** Constructor options for {@link CircuitBreaker} */
export interface CircuitBreakerOptions {
/** Consecutive failures before opening the circuit (default: 3) */
failureThreshold?: number | undefined;
/** Milliseconds to wait before probing recovery (default: 60 000) */
resetTimeoutMs?: number | undefined;
}
/**
* Circuit breaker preventing cascading MCP failures.
*
* - **CLOSED** — normal operation; all requests pass through.
* - **OPEN** — fast-fail; requests are rejected for `resetTimeoutMs` ms.
* - **HALF_OPEN** — probe state; one request is allowed to test recovery.
*/
export class CircuitBreaker {
private state: CircuitState = 'CLOSED';
private consecutiveFailures = 0;
private nextAttemptAt = 0;
private halfOpenProbeInFlight = false;
private readonly failureThreshold: number;
private readonly resetTimeoutMs: number;
constructor(options: CircuitBreakerOptions = {}) {
this.failureThreshold = options.failureThreshold ?? 3;
this.resetTimeoutMs = options.resetTimeoutMs ?? 60_000;
}
/**
* Whether a request may proceed given the current circuit state.
*
* In HALF_OPEN state only a single probe is allowed at a time; subsequent
* calls return `false` until the in-flight probe records success or failure.
*
* @returns `true` when the circuit is CLOSED, or HALF_OPEN with no probe in flight
*/
canRequest(): boolean {
if (this.state === 'CLOSED') return true;
if (this.state === 'OPEN') {
if (Date.now() >= this.nextAttemptAt) {
this.state = 'HALF_OPEN';
this.halfOpenProbeInFlight = false;
// Fall through to HALF_OPEN probe logic below
} else {
return false;
}
}
// HALF_OPEN: allow exactly one probe in flight at a time
if (this.halfOpenProbeInFlight) return false;
this.halfOpenProbeInFlight = true;
return true;
}
/** Record a successful request and close the circuit */
recordSuccess(): void {
this.consecutiveFailures = 0;
this.halfOpenProbeInFlight = false;
this.state = 'CLOSED';
}
/**
* Record a failed request.
*
* - When in **HALF_OPEN** the circuit re-opens immediately (the probe failed).
* - When in **CLOSED** the circuit opens only once the failure threshold is reached.
*/
recordFailure(): void {
this.halfOpenProbeInFlight = false;
Iif (this.state === 'HALF_OPEN') {
// Probe failed — immediately re-open and back off again
this.state = 'OPEN';
this.nextAttemptAt = Date.now() + this.resetTimeoutMs;
console.warn('⚡ Circuit breaker re-OPEN after HALF_OPEN probe failure');
return;
}
this.consecutiveFailures++;
if (this.consecutiveFailures >= this.failureThreshold) {
this.state = 'OPEN';
this.nextAttemptAt = Date.now() + this.resetTimeoutMs;
console.warn(
`⚡ Circuit breaker OPEN after ${this.consecutiveFailures} consecutive failures`
);
}
}
/**
* Return the current circuit state.
*
* @returns Current circuit state
*/
getState(): CircuitState {
return this.state;
}
/**
* Return current statistics for observability.
*
* @returns Snapshot of state and consecutive failure count
*/
getStats(): Readonly<{ state: CircuitState; consecutiveFailures: number }> {
return { state: this.state, consecutiveFailures: this.consecutiveFailures };
}
}
/** Module-level circuit breaker shared across all MCP fetch operations */
export const mcpCircuitBreaker = new CircuitBreaker();
/**
* Execute a single MCP API call through the module-level circuit breaker.
* Short-circuits with `fallback` whenever the circuit breaker is not
* accepting requests (for example when OPEN, or in HALF_OPEN with no
* probe slots available).
* Records success or failure after each call, opening the circuit when
* {@link CircuitBreakerOptions.failureThreshold} consecutive failures occur.
*
* @param fn - Async factory that performs the MCP call
* @param fallback - Value returned when the circuit is not accepting requests
* @param context - Label used in warning messages
* @returns Result of `fn` or `fallback`
*/
async function callMCP<T>(fn: () => Promise<T>, fallback: T, context: string): Promise<T> {
if (!mcpCircuitBreaker.canRequest()) {
console.warn(
`${WARN_PREFIX} Circuit breaker not accepting requests (${mcpCircuitBreaker.getState()}) — skipping ${context}`
);
return fallback;
}
try {
const result = await fn();
mcpCircuitBreaker.recordSuccess();
return result;
} catch (error) {
mcpCircuitBreaker.recordFailure();
throw error;
}
}
// ─── Internal helpers ─────────────────────────────────────────────────────────
/**
* Parse JSON text, returning `null` and logging a warning on parse failure.
*
* @param text - Raw JSON string
* @param context - Label used in the warning message
* @returns Parsed value or null
*/
function parseJSON<T>(text: string, context: string): T | null {
try {
return JSON.parse(text) as T;
} catch {
console.warn(`${WARN_PREFIX} Failed to parse JSON for ${context}`);
return null;
}
}
/** Base shape for feed items that carry a date field */
type DatedFeedItem = { date: string };
/**
* Normalize a feed-item date into canonical UTC `YYYY-MM-DD` form.
*
* @param value - Raw date string from MCP or a prefetched feed file
* @returns Canonical date string, or undefined when the value is missing/invalid
*/
function normalizeFeedItemDate(value: string): string | undefined {
const trimmed = value.trim();
if (trimmed === '') return undefined;
const directDate = trimmed.slice(0, 10);
Eif (directDate.length === 10) {
const direct = new Date(`${directDate}T00:00:00Z`);
Eif (!Number.isNaN(direct.getTime())) {
return directDate;
}
}
const parsed = new Date(trimmed);
if (Number.isNaN(parsed.getTime())) return undefined;
const parts = parsed.toISOString().split('T');
return parts[0];
}
/**
* Filter dated feed items to an inclusive UTC date window.
*
* Items without a parseable `date` are dropped when a window is supplied.
*
* @param items - Feed items to filter
* @param dateRange - Inclusive UTC window, or undefined to keep all items
* @param label - Human-readable label used in logs
* @returns Filtered array
*/
function filterFeedItemsByDateRange<T extends DatedFeedItem>(
items: readonly T[],
dateRange: DateRange | undefined,
label: string
): T[] {
if (!dateRange) return [...items];
const filtered = items.filter((item) => {
const normalized = normalizeFeedItemDate(item.date);
return normalized !== undefined && normalized >= dateRange.start && normalized <= dateRange.end;
});
if (filtered.length !== items.length) {
console.log(
`${INFO_PREFIX} Filtered ${label} to ${filtered.length}/${items.length} items within ` +
`${dateRange.start}..${dateRange.end}`
);
}
return filtered;
}
/**
* Apply a date-range filter across all breaking-news feed arrays.
*
* @param feedData - Feed data to filter
* @param dateRange - Inclusive UTC window, or undefined to keep all items
* @returns Filtered feed payload
*/
function filterBreakingNewsFeedDataByDateRange(
feedData: BreakingNewsFeedData,
dateRange: DateRange | undefined
): BreakingNewsFeedData {
const filteredMEPUpdates = filterFeedItemsByDateRange(
feedData.mepUpdates,
dateRange,
'MEP updates'
);
return {
adoptedTexts: filterFeedItemsByDateRange(feedData.adoptedTexts, dateRange, 'adopted texts'),
events: filterFeedItemsByDateRange(feedData.events, dateRange, 'events'),
procedures: filterFeedItemsByDateRange(feedData.procedures, dateRange, 'procedures'),
mepUpdates: filteredMEPUpdates,
// When a date-range filter is applied the API-reported total covers the full
// feed window, not the filtered subset — clear it to avoid a misleading
// truncation note ("showing 10 of 525" on a single-day slice).
totalMEPUpdates: dateRange === undefined ? feedData.totalMEPUpdates : undefined,
};
}
/**
* Apply a date-range filter across all comprehensive EP feed arrays.
*
* @param feedData - Feed data to filter
* @param dateRange - Inclusive UTC window, or undefined to keep all items
* @returns Filtered feed payload
*/
function filterEPFeedDataByDateRange(
feedData: EPFeedData,
dateRange: DateRange | undefined
): EPFeedData {
return {
adoptedTexts: filterFeedItemsByDateRange(feedData.adoptedTexts, dateRange, 'adopted texts'),
events: filterFeedItemsByDateRange(feedData.events, dateRange, 'events'),
procedures: filterFeedItemsByDateRange(feedData.procedures, dateRange, 'procedures'),
mepUpdates: filterFeedItemsByDateRange(feedData.mepUpdates, dateRange, 'MEP updates'),
documents: filterFeedItemsByDateRange(feedData.documents, dateRange, 'documents'),
plenaryDocuments: filterFeedItemsByDateRange(
feedData.plenaryDocuments,
dateRange,
'plenary documents'
),
committeeDocuments: filterFeedItemsByDateRange(
feedData.committeeDocuments,
dateRange,
'committee documents'
),
plenarySessionDocuments: filterFeedItemsByDateRange(
feedData.plenarySessionDocuments,
dateRange,
'plenary session documents'
),
externalDocuments: filterFeedItemsByDateRange(
feedData.externalDocuments,
dateRange,
'external documents'
),
questions: filterFeedItemsByDateRange(feedData.questions, dateRange, 'questions'),
declarations: filterFeedItemsByDateRange(feedData.declarations, dateRange, 'declarations'),
corporateBodies: filterFeedItemsByDateRange(
feedData.corporateBodies,
dateRange,
'corporate bodies'
),
};
}
/**
* Compute an inclusive UTC date window ending on `endDate`.
*
* @param endDate - Inclusive UTC end date in `YYYY-MM-DD` form
* @param lookbackDays - Number of calendar days to subtract for the start date
* @param context - Label used in error messages
* @returns Inclusive date range
*/
export function computeRollingDateRange(
endDate: string,
lookbackDays: number,
context: string
): DateRange {
const startDate = new Date(`${endDate}T00:00:00Z`);
startDate.setUTCDate(startDate.getUTCDate() - lookbackDays);
const startDateParts = startDate.toISOString().split('T');
Iif (!startDateParts[0]) {
throw new Error(`Invalid date format generated for ${context}`);
}
return { start: startDateParts[0], end: endDate };
}
// ─── MCP client initialisation ───────────────────────────────────────────────
/**
* Attempt to connect to the European Parliament MCP server.
* Returns `null` (with a warning) if the connection fails or MCP is disabled.
*
* @param useMCP - Whether MCP should be used at all
* @returns Connected client or null
*/
export async function initializeMCPClient(
useMCP: boolean
): Promise<EuropeanParliamentMCPClient | null> {
Eif (!useMCP) {
console.log(`${INFO_PREFIX} MCP client disabled via USE_EP_MCP=false`);
return null;
}
try {
console.log('🔌 Attempting to connect to European Parliament MCP Server...');
const client = await getEPMCPClient();
console.log('✅ MCP client connected successfully');
return client;
} catch (error) {
const message = error instanceof Error ? error.message : String(error);
console.warn('⚠️ Could not connect to MCP server:', message);
console.warn('⚠️ Falling back to placeholder content');
return null;
}
}
// ─── Pre-fetched feed data loading ───────────────────────────────────────────
/**
* Check whether a value is a non-null, non-array plain object.
*
* @param v - Value to check
* @returns True when v is a plain object
*/
function isPlainObject(v: unknown): v is Record<string, unknown> {
return typeof v === 'object' && v !== null && !Array.isArray(v);
}
/**
* Sanitize an array of raw items into feed items with title-based required fields.
* Filters out non-objects and coerces `id`, `title`, `date` to strings.
*
* Uses `as unknown as T` because the spread preserves optional properties from
* the source JSON while the explicit field assignments guarantee the required
* base fields — TypeScript cannot infer this mixed provenance automatically.
*
* @param items - Raw array of unknown values from JSON
* @returns Sanitized array of typed feed items
*/
function sanitizeTitleItems<T extends { id: string; title: string; date: string }>(
items: readonly unknown[]
): T[] {
return items
.filter(isPlainObject)
.filter(
(item) =>
(item['id'] !== undefined && item['id'] !== null) ||
(item['title'] !== undefined && item['title'] !== null)
)
.map(
(item) =>
({
...item,
id: String(item['id'] ?? ''),
title: String(item['title'] ?? ''),
date: String(item['date'] ?? ''),
}) as unknown as T
);
}
/**
* Sanitize an array of raw items into MEP feed items.
* Filters out non-objects and coerces `id`, `name`, `date` to strings.
*
* @param items - Raw array of unknown values from JSON
* @returns Sanitized array of MEP feed items
*/
function sanitizeMEPItems(items: readonly unknown[]): MEPFeedItem[] {
return items
.filter(isPlainObject)
.filter(
(item) =>
(item['id'] !== undefined && item['id'] !== null) ||
(item['name'] !== undefined && item['name'] !== null)
)
.map(
(item) =>
({
...item,
id: String(item['id'] ?? ''),
name: String(item['name'] ?? ''),
date: String(item['date'] ?? ''),
}) as unknown as MEPFeedItem
);
}
/**
* Load pre-fetched feed data from a JSON file on disk.
*
* Agentic workflows fetch EP data via framework MCP tools but the TypeScript
* generator cannot access those tools directly. The workflow saves the MCP
* results to a JSON file and the generator reads them via this function,
* avoiding the need to manually construct article HTML.
*
* The file must contain a JSON object. The optional keys
* `adoptedTexts`, `events`, `procedures`, and `mepUpdates` are treated as
* arrays and default to empty arrays when missing (an empty object `{}` is valid).
*
* @param filePath - Absolute or relative path to the JSON file
* @param dateRange - Optional inclusive UTC window for filtering loaded items
* @returns Parsed {@link BreakingNewsFeedData}, or `undefined` on any error
*/
export function loadFeedDataFromFile(
filePath: string,
dateRange?: DateRange
): BreakingNewsFeedData | undefined {
try {
if (!fs.existsSync(filePath)) {
console.warn(`${WARN_PREFIX} Feed data file not found: ${filePath}`);
return undefined;
}
const raw = fs.readFileSync(filePath, 'utf-8');
const parsed: unknown = JSON.parse(raw);
if (typeof parsed !== 'object' || parsed === null || Array.isArray(parsed)) {
console.warn(`${WARN_PREFIX} Feed data file must contain a JSON object`);
return undefined;
}
const obj = parsed as Record<string, unknown>;
const adoptedTexts = sanitizeTitleItems<AdoptedTextFeedItem>(
Array.isArray(obj['adoptedTexts']) ? obj['adoptedTexts'] : []
);
const events = sanitizeTitleItems<EventFeedItem>(
Array.isArray(obj['events']) ? obj['events'] : []
);
const procedures = sanitizeTitleItems<ProcedureFeedItem>(
Array.isArray(obj['procedures']) ? obj['procedures'] : []
);
const mepUpdates = sanitizeMEPItems(Array.isArray(obj['mepUpdates']) ? obj['mepUpdates'] : []);
const totalMEPUpdates =
typeof obj['totalMEPUpdates'] === 'number' ? obj['totalMEPUpdates'] : undefined;
const filteredData = filterBreakingNewsFeedDataByDateRange(
{
adoptedTexts,
events,
procedures,
mepUpdates,
totalMEPUpdates,
},
dateRange
);
console.log(
`${INFO_PREFIX} Loaded feed data from file: ` +
`${filteredData.adoptedTexts.length} adopted texts, ${filteredData.events.length} events, ` +
`${filteredData.procedures.length} procedures, ${filteredData.mepUpdates.length} MEP updates`
);
return filteredData;
} catch (error) {
const message = error instanceof Error ? error.message : String(error);
console.warn(`${WARN_PREFIX} Failed to load feed data from file: ${message}`);
return undefined;
}
}
/**
* Load pre-fetched comprehensive EP feed data from a JSON file on disk.
*
* Agentic workflows fetch EP data via framework MCP tools but the TypeScript
* generator cannot access those tools directly. The workflow saves the MCP
* results to a JSON file and the generator reads them via this function,
* avoiding the need to manually construct article HTML.
*
* The file must contain a JSON object with EP feed data keys.
* Missing keys default to empty arrays.
*
* @param filePath - Absolute or relative path to the JSON file
* @param dateRange - Optional inclusive UTC window for filtering loaded items
* @returns Parsed {@link EPFeedData}, or `undefined` on any error
*/
export function loadEPFeedDataFromFile(
filePath: string,
dateRange?: DateRange
): EPFeedData | undefined {
try {
if (!fs.existsSync(filePath)) {
console.warn(`${WARN_PREFIX} EP feed data file not found: ${filePath}`);
return undefined;
}
const raw = fs.readFileSync(filePath, 'utf-8');
const parsed: unknown = JSON.parse(raw);
if (typeof parsed !== 'object' || parsed === null || Array.isArray(parsed)) {
console.warn(`${WARN_PREFIX} EP feed data file must contain a JSON object`);
return undefined;
}
const obj = parsed as Record<string, unknown>;
const safeArray = (key: string): readonly unknown[] =>
Array.isArray(obj[key]) ? (obj[key] as unknown[]) : [];
const adoptedTexts = sanitizeTitleItems<AdoptedTextFeedItem>(safeArray('adoptedTexts'));
const events = sanitizeTitleItems<EventFeedItem>(safeArray('events'));
const procedures = sanitizeTitleItems<ProcedureFeedItem>(safeArray('procedures'));
const mepUpdates = sanitizeMEPItems(safeArray('mepUpdates'));
const documents = sanitizeTitleItems<DocumentFeedItem>(safeArray('documents'));
const plenaryDocuments = sanitizeTitleItems<DocumentFeedItem>(safeArray('plenaryDocuments'));
const committeeDocuments = sanitizeTitleItems<DocumentFeedItem>(
safeArray('committeeDocuments')
);
const plenarySessionDocuments = sanitizeTitleItems<DocumentFeedItem>(
safeArray('plenarySessionDocuments')
);
const externalDocuments = sanitizeTitleItems<DocumentFeedItem>(safeArray('externalDocuments'));
const questions = sanitizeTitleItems<QuestionFeedItem>(safeArray('questions'));
const declarations = sanitizeTitleItems<DeclarationFeedItem>(safeArray('declarations'));
const corporateBodies = sanitizeTitleItems<CorporateBodyFeedItem>(safeArray('corporateBodies'));
const filteredData = filterEPFeedDataByDateRange(
{
adoptedTexts,
events,
procedures,
mepUpdates,
documents,
plenaryDocuments,
committeeDocuments,
plenarySessionDocuments,
externalDocuments,
questions,
declarations,
corporateBodies,
},
dateRange
);
const totalItems =
filteredData.adoptedTexts.length +
filteredData.events.length +
filteredData.procedures.length +
filteredData.mepUpdates.length +
filteredData.documents.length +
filteredData.plenaryDocuments.length +
filteredData.committeeDocuments.length +
filteredData.plenarySessionDocuments.length +
filteredData.externalDocuments.length +
filteredData.questions.length +
filteredData.declarations.length +
filteredData.corporateBodies.length;
console.log(
`${INFO_PREFIX} Loaded EP feed data from file: ${totalItems} total items across 12 keys`
);
return filteredData;
} catch (error) {
const message = error instanceof Error ? error.message : String(error);
console.warn(`${WARN_PREFIX} Failed to load EP feed data from file: ${message}`);
return undefined;
}
}
// ─── Week-Ahead fetches ──────────────────────────────────────────────────────
/**
* Fetch aggregated week-ahead data from multiple MCP sources in parallel.
* Returns placeholder data when the client is unavailable.
*
* @param client - MCP client or null
* @param dateRange - Date range for the week-ahead period
* @returns Aggregated week-ahead data
*/
export async function fetchWeekAheadData(
client: EuropeanParliamentMCPClient | null,
dateRange: DateRange
): Promise<WeekAheadData> {
if (!client) {
console.log(`${INFO_PREFIX} MCP unavailable — using placeholder events`);
return {
events: PLACEHOLDER_EVENTS.map((e) => ({ ...e, date: dateRange.start })),
committees: [],
documents: [],
pipeline: [],
questions: [],
};
}
if (!mcpCircuitBreaker.canRequest()) {
console.warn(
`${WARN_PREFIX} Circuit breaker not accepting requests (${mcpCircuitBreaker.getState()}) — using placeholder events`
);
return {
events: PLACEHOLDER_EVENTS.map((e) => ({ ...e, date: dateRange.start })),
committees: [],
documents: [],
pipeline: [],
questions: [],
};
}
// Record whether we entered as a HALF_OPEN probe so any rejection triggers
// an immediate re-open (normal circuit-breaker probe semantics).
const wasHalfOpen = mcpCircuitBreaker.getState() === 'HALF_OPEN';
console.log(`${MCP_FETCH_PREFIX} Fetching week-ahead data from MCP (parallel)...`);
const [plenarySessions, committeeInfo, documents, pipeline, questions, epEvents] =
await Promise.allSettled([
client.getPlenarySessions({ startDate: dateRange.start, endDate: dateRange.end, limit: 50 }),
client.getCommitteeInfo({ limit: 20 }),
client.searchDocuments({ query: 'parliament', limit: 20 }),
client.monitorLegislativePipeline({
dateFrom: dateRange.start,
dateTo: dateRange.end,
status: 'ACTIVE',
limit: 20,
}),
client.getParliamentaryQuestions({ startDate: dateRange.start, limit: 20 }),
client.getEvents({ dateFrom: dateRange.start, dateTo: dateRange.end, limit: 20 }),
]);
const allFailed = [
plenarySessions,
committeeInfo,
documents,
pipeline,
questions,
epEvents,
].every((r) => r.status === 'rejected');
const anyFailed = [plenarySessions, committeeInfo, documents, pipeline, questions, epEvents].some(
(r) => r.status === 'rejected'
);
// In HALF_OPEN any single rejection means the probe failed — re-open immediately.
Iif (allFailed || (wasHalfOpen && anyFailed)) {
mcpCircuitBreaker.recordFailure();
} else {
mcpCircuitBreaker.recordSuccess();
}
const plenaryEvents = parsePlenarySessions(plenarySessions, dateRange.start);
const additionalEvents = parseEPEvents(epEvents, dateRange.start);
const events = [...plenaryEvents, ...additionalEvents];
return {
events: events.length > 0 ? events : [{ ...PLACEHOLDER_EVENTS[0]!, date: dateRange.start }],
committees: parseCommitteeMeetings(committeeInfo, dateRange.start),
documents: parseLegislativeDocuments(documents),
pipeline: parseLegislativePipeline(pipeline),
questions: parseParliamentaryQuestions(questions),
};
}
// ─── Breaking-News fetches ───────────────────────────────────────────────────
/**
* Fetch voting anomaly text from MCP, returning empty string on failure.
*
* @param client - MCP client or null
* @returns Raw anomaly data text
*/
export async function fetchVotingAnomalies(
client: EuropeanParliamentMCPClient | null
): Promise<string> {
if (!client) return '';
try {
const result = await callMCP(
() => client.callTool('detect_voting_anomalies', { sensitivityThreshold: 0.3 }),
undefined,
'detect_voting_anomalies'
);
return result?.content?.[0]?.text ?? '';
} catch (error) {
const message = error instanceof Error ? error.message : String(error);
console.warn(`${WARN_PREFIX} detect_voting_anomalies failed:`, message);
return '';
}
}
/**
* Fetch coalition dynamics analysis text from MCP.
*
* @param client - MCP client or null
* @returns Raw coalition dynamics text
*/
export async function fetchCoalitionDynamics(
client: EuropeanParliamentMCPClient | null
): Promise<string> {
if (!client) return '';
try {
const result = await callMCP(
() => client.callTool('analyze_coalition_dynamics', {}),
undefined,
'analyze_coalition_dynamics'
);
return result?.content?.[0]?.text ?? '';
} catch (error) {
const message = error instanceof Error ? error.message : String(error);
console.warn(`${WARN_PREFIX} analyze_coalition_dynamics failed:`, message);
return '';
}
}
/**
* Fetch voting statistics report text from MCP.
*
* @param client - MCP client or null
* @returns Raw voting report text
*/
export async function fetchVotingReport(
client: EuropeanParliamentMCPClient | null
): Promise<string> {
if (!client) return '';
try {
const result = await callMCP(
() => client.callTool('generate_report', { reportType: 'VOTING_STATISTICS' }),
undefined,
'generate_report'
);
return result?.content?.[0]?.text ?? '';
} catch (error) {
const message = error instanceof Error ? error.message : String(error);
console.warn(`${WARN_PREFIX} generate_report failed:`, message);
return '';
}
}
/**
* Fetch MEP influence assessment text from MCP.
* Short-circuits immediately when `mepId` is empty.
*
* @param client - MCP client or null
* @param mepId - MEP identifier; pass empty string to skip the call
* @returns Raw influence data text
*/
export async function fetchMEPInfluence(
client: EuropeanParliamentMCPClient | null,
mepId: string
): Promise<string> {
if (!mepId || !client) return '';
try {
const result = await callMCP(
() => client.callTool('assess_mep_influence', { mepId, includeDetails: true }),
undefined,
'assess_mep_influence'
);
return result?.content?.[0]?.text ?? '';
} catch (error) {
const message = error instanceof Error ? error.message : String(error);
console.warn(`${WARN_PREFIX} assess_mep_influence failed:`, message);
return '';
}
}
// ─── Committee-Reports fetches ───────────────────────────────────────────────
/**
* Load pre-fetched committee data for a given abbreviation from a JSON file.
*
* The file must be a JSON object keyed by committee abbreviation, where each
* value conforms to {@link CommitteeData}. This allows agentic workflows to
* inject real EP committee data into the generator without a live MCP
* connection (same pattern as {@link loadEPFeedDataFromFile}).
*
* @param filePath - Path to the JSON file
* @param abbreviation - Committee code (e.g. `"ENVI"`)
* @returns Parsed {@link CommitteeData} for the committee, or `undefined`
*/
export function loadCommitteeDataFromFile(
filePath: string,
abbreviation: string
): CommitteeData | undefined {
try {
if (!fs.existsSync(filePath)) {
console.warn(`${WARN_PREFIX} Committee data file not found: ${filePath}`);
return undefined;
}
const raw = fs.readFileSync(filePath, 'utf-8');
const parsed: unknown = JSON.parse(raw);
if (typeof parsed !== 'object' || parsed === null || Array.isArray(parsed)) {
console.warn(`${WARN_PREFIX} Committee data file must contain a JSON object`);
return undefined;
}
const obj = parsed as Record<string, unknown>;
const entry = obj[abbreviation];
if (!entry || typeof entry !== 'object' || Array.isArray(entry)) {
return undefined;
}
const e = entry as Record<string, unknown>;
const docs = Array.isArray(e['documents'])
? (e['documents'] as unknown[])
.filter(
(d): d is Record<string, unknown> =>
typeof d === 'object' && d !== null && !Array.isArray(d)
)
.map((doc) => ({
title: typeof doc['title'] === 'string' ? doc['title'] : 'Document',
type: typeof doc['type'] === 'string' ? doc['type'] : 'Document',
date: typeof doc['date'] === 'string' ? doc['date'] : '',
}))
: [];
const result: CommitteeData = {
name: typeof e['name'] === 'string' ? e['name'] : `${abbreviation} Committee`,
abbreviation,
chair: typeof e['chair'] === 'string' ? e['chair'] : 'N/A',
members: typeof e['members'] === 'number' && Number.isFinite(e['members']) ? e['members'] : 0,
documents: docs,
effectiveness: typeof e['effectiveness'] === 'string' ? e['effectiveness'] : null,
};
console.log(
`${INFO_PREFIX} Loaded committee data from file: ${result.name} (${docs.length} documents)`
);
return result;
} catch (error) {
const message = error instanceof Error ? error.message : String(error);
console.warn(`${WARN_PREFIX} Failed to load committee data from file: ${message}`);
return undefined;
}
}
/**
* Try to load committee data from the `EP_COMMITTEE_DATA_FILE` env var.
* Returns the loaded {@link CommitteeData} when available, or `undefined` when
* the env var is unset or the file does not contain an entry for the given
* committee abbreviation. Logs a warning when the file exists but the entry
* is missing so callers can fall through to an MCP fetch.
*
* @param abbreviation - Committee code (e.g. `"ENVI"`)
* @returns Pre-fetched committee data or `undefined`
*/
function tryLoadCommitteeDataFromEnv(abbreviation: string): CommitteeData | undefined {
const filePath = process.env['EP_COMMITTEE_DATA_FILE'];
if (!filePath) return undefined;
const data = loadCommitteeDataFromFile(filePath, abbreviation);
if (!data && fs.existsSync(filePath)) {
console.warn(
`${WARN_PREFIX} Committee data for ${abbreviation} not found in file — falling through to MCP fetch`
);
}
return data;
}
/**
* Fetch committee data from three MCP sources for the given abbreviation.
* Each source failure is caught individually so partial data is still returned.
*
* When the environment variable `EP_COMMITTEE_DATA_FILE` is set, pre-fetched
* committee data is loaded from that JSON file instead of calling the MCP
* client. This enables agentic workflows to inject real EP data.
*
* @param client - MCP client or null
* @param abbreviation - Committee code (e.g. `"ENVI"`)
* @returns Populated committee data
*/
export async function fetchCommitteeData(
client: EuropeanParliamentMCPClient | null,
abbreviation: string
): Promise<CommitteeData> {
const defaultResult: CommitteeData = {
name: `${abbreviation} Committee`,
abbreviation,
chair: 'N/A',
members: 0,
documents: [],
effectiveness: null,
};
// Check for pre-fetched committee data file (set by EP_COMMITTEE_DATA_FILE env var).
// This mirrors the EP_FEED_DATA_FILE pattern for fetchEPFeedData.
const fromFile = tryLoadCommitteeDataFromEnv(abbreviation);
if (fromFile) return fromFile;
if (!client) return defaultResult;
try {
console.log(`${MCP_FETCH_PREFIX} Fetching committee info for ${abbreviation}...`);
const committeeResult = await callMCP(
() => client.getCommitteeInfo({ committeeId: abbreviation }),
null,
`getCommitteeInfo(${abbreviation})`
);
Iif (committeeResult) applyCommitteeInfo(committeeResult, defaultResult, abbreviation);
} catch (err) {
const message = err instanceof Error ? err.message : String(err);
console.warn(`${WARN_PREFIX} getCommitteeInfo failed for ${abbreviation}:`, message);
}
try {
console.log(`${MCP_FETCH_PREFIX} Fetching documents for ${abbreviation}...`);
const docsResult = await callMCP(
() => client.searchDocuments({ query: abbreviation, limit: 5 }),
null,
`searchDocuments(${abbreviation})`
);
Iif (docsResult) applyDocuments(docsResult, defaultResult);
} catch (err) {
const message = err instanceof Error ? err.message : String(err);
console.warn(`${WARN_PREFIX} searchDocuments failed for ${abbreviation}:`, message);
}
try {
const effectivenessResult = await callMCP(
() =>
client.analyzeLegislativeEffectiveness({
subjectType: 'COMMITTEE',
subjectId: abbreviation,
}),
null,
`analyzeLegislativeEffectiveness(${abbreviation})`
);
if (effectivenessResult) applyEffectiveness(effectivenessResult, defaultResult);
} catch (err) {
const message = err instanceof Error ? err.message : String(err);
console.warn(
`${WARN_PREFIX} analyzeLegislativeEffectiveness failed for ${abbreviation}:`,
message
);
}
return defaultResult;
}
// ─── Motions fetches ─────────────────────────────────────────────────────────
/**
* Fetch recent voting records from MCP.
*
* @param client - MCP client or null
* @param dateFromStr - Start date (YYYY-MM-DD)
* @param dateStr - End date (YYYY-MM-DD)
* @returns Array of voting records
*/
export async function fetchVotingRecords(
client: EuropeanParliamentMCPClient | null,
dateFromStr: string,
dateStr: string
): Promise<VotingRecord[]> {
if (!client) return [];
try {
console.log(`${MCP_FETCH_PREFIX} Fetching voting records from MCP server...`);
const votingResult = (await callMCP(
() =>
client.callTool('get_voting_records', {
dateFrom: dateFromStr,
dateTo: dateStr,
limit: 20,
}),
undefined,
'get_voting_records'
)) as MCPToolResult | undefined;
if (votingResult?.content?.[0]) {
const data = parseJSON<{
records?: Array<{
title?: string | undefined;
date?: string | undefined;
result?: string | undefined;
votes?:
| {
for?: number | undefined;
against?: number | undefined;
abstain?: number | undefined;
}
| undefined;
}>;
}>(votingResult.content[0].text, 'voting records');
Eif (data?.records && data.records.length > 0) {
console.log(` ✅ Fetched ${data.records.length} voting records from MCP`);
return data.records.map((r) => ({
title: r.title ?? 'Parliamentary Vote',
date: r.date ?? dateStr,
result: r.result ?? 'Adopted',
votes: {
for: r.votes?.for ?? 0,
against: r.votes?.against ?? 0,
abstain: r.votes?.abstain ?? 0,
},
}));
}
}
} catch (error) {
const message = error instanceof Error ? error.message : String(error);
console.warn(`${WARN_PREFIX} MCP voting records fetch failed:`, message);
}
return [];
}
/**
* Fetch voting patterns from MCP.
*
* @param client - MCP client or null
* @param dateFromStr - Start date
* @param dateStr - End date
* @returns Array of voting patterns
*/
export async function fetchVotingPatterns(
client: EuropeanParliamentMCPClient | null,
dateFromStr: string,
dateStr: string
): Promise<VotingPattern[]> {
if (!client) return [];
try {
console.log(`${MCP_FETCH_PREFIX} Fetching voting patterns from MCP server...`);
const patternsResult = (await callMCP(
() =>
client.callTool('analyze_voting_patterns', {
dateFrom: dateFromStr,
dateTo: dateStr,
}),
undefined,
'analyze_voting_patterns'
)) as MCPToolResult | undefined;
if (patternsResult?.content?.[0]) {
const data = parseJSON<{
patterns?:
| Array<{
group?: string | undefined;
cohesion?: number | undefined;
participation?: number | undefined;
}>
| undefined;
}>(patternsResult.content[0].text, 'voting patterns');
Eif (data?.patterns && data.patterns.length > 0) {
console.log(` ✅ Fetched ${data.patterns.length} voting patterns from MCP`);
return data.patterns.map((p) => ({
group: p.group ?? 'Unknown Group',
cohesion: p.cohesion ?? 0,
participation: p.participation ?? 0,
}));
}
}
} catch (error) {
const message = error instanceof Error ? error.message : String(error);
console.warn(`${WARN_PREFIX} MCP voting patterns fetch failed:`, message);
}
return [];
}
/**
* Fetch voting anomalies for a date range from MCP.
*
* @param client - MCP client or null
* @param dateFromStr - Start date
* @param dateStr - End date
* @returns Array of voting anomalies
*/
export async function fetchMotionsAnomalies(
client: EuropeanParliamentMCPClient | null,
dateFromStr: string,
dateStr: string
): Promise<VotingAnomaly[]> {
if (!client) return [];
try {
console.log(`${MCP_FETCH_PREFIX} Fetching voting anomalies from MCP server...`);
const anomaliesResult = (await callMCP(
() =>
client.callTool('detect_voting_anomalies', {
dateFrom: dateFromStr,
dateTo: dateStr,
}),
undefined,
'detect_voting_anomalies'
)) as MCPToolResult | undefined;
if (anomaliesResult?.content?.[0]) {
const data = parseJSON<{
anomalies?:
| Array<{
type?: string | undefined;
description?: string | undefined;
severity?: string | undefined;
}>
| undefined;
}>(anomaliesResult.content[0].text, 'voting anomalies');
Eif (data?.anomalies && data.anomalies.length > 0) {
console.log(` ✅ Fetched ${data.anomalies.length} voting anomalies from MCP`);
return data.anomalies.map((a) => ({
type: a.type ?? 'Unusual Pattern',
description: a.description ?? 'No description available',
severity: a.severity ?? 'MEDIUM',
}));
}
}
} catch (error) {
const message = error instanceof Error ? error.message : String(error);
console.warn(`${WARN_PREFIX} MCP voting anomalies fetch failed:`, message);
}
return [];
}
/**
* Fetch parliamentary questions from MCP for the given date range.
*
* @param client - MCP client or null
* @param dateFromStr - Start date
* @param dateStr - End date
* @returns Array of parliamentary questions
*/
export async function fetchParliamentaryQuestionsForMotions(
client: EuropeanParliamentMCPClient | null,
dateFromStr: string,
dateStr: string
): Promise<MotionsQuestion[]> {
if (!client) return [];
try {
console.log(`${MCP_FETCH_PREFIX} Fetching parliamentary questions from MCP server...`);
const questionsResult = await callMCP(
() =>
client.getParliamentaryQuestions({
dateFrom: dateFromStr,
dateTo: dateStr,
limit: 10,
}),
undefined,
'get_parliamentary_questions'
);
if (questionsResult?.content?.[0]) {
const data = parseJSON<{
questions?: Array<{
author?: string | undefined;
topic?: string | undefined;
subject?: string | undefined;
date?: string | undefined;
status?: string | undefined;
}>;
}>(questionsResult.content[0].text, 'parliamentary questions');
if (data?.questions && data.questions.length > 0) {
console.log(` ✅ Fetched ${data.questions.length} parliamentary questions from MCP`);
return data.questions.map((q) => ({
author: q.author ?? 'Unknown MEP',
topic: q.topic ?? q.subject ?? 'General inquiry',
date: q.date ?? dateStr,
status: q.status ?? 'PENDING',
}));
}
}
} catch (error) {
const message = error instanceof Error ? error.message : String(error);
console.warn(`${WARN_PREFIX} MCP parliamentary questions fetch failed:`, message);
}
return [];
}
/**
* Fetch all motions data in parallel, applying fallback arrays for any
* section where MCP returned nothing.
*
* @param client - MCP client or null
* @param dateFromStr - Start date
* @param dateStr - End date
* @returns All motions data with fallbacks applied
*/
export async function fetchMotionsData(
client: EuropeanParliamentMCPClient | null,
dateFromStr: string,
dateStr: string
): Promise<{
votingRecords: VotingRecord[];
votingPatterns: VotingPattern[];
anomalies: VotingAnomaly[];
questions: MotionsQuestion[];
}> {
const [votingRecordsResult, votingPatternsResult, anomaliesResult, questionsResult] =
await Promise.allSettled([
fetchVotingRecords(client, dateFromStr, dateStr),
fetchVotingPatterns(client, dateFromStr, dateStr),
fetchMotionsAnomalies(client, dateFromStr, dateStr),
fetchParliamentaryQuestionsForMotions(client, dateFromStr, dateStr),
]);
let votingRecords: VotingRecord[] =
votingRecordsResult.status === 'fulfilled' ? votingRecordsResult.value : [];
Iif (votingRecordsResult.status === 'rejected') {
console.warn(`${WARN_PREFIX} Failed to fetch voting records from MCP`);
}
let votingPatterns: VotingPattern[] =
votingPatternsResult.status === 'fulfilled' ? votingPatternsResult.value : [];
Iif (votingPatternsResult.status === 'rejected') {
console.warn(`${WARN_PREFIX} Failed to fetch voting patterns from MCP`);
}
let anomalies: VotingAnomaly[] =
anomaliesResult.status === 'fulfilled' ? anomaliesResult.value : [];
Iif (anomaliesResult.status === 'rejected') {
console.warn(`${WARN_PREFIX} Failed to fetch voting anomalies from MCP`);
}
let questions: MotionsQuestion[] =
questionsResult.status === 'fulfilled' ? questionsResult.value : [];
Iif (questionsResult.status === 'rejected') {
console.warn(`${WARN_PREFIX} Failed to fetch parliamentary questions from MCP`);
}
const fallback = getMotionsFallbackData(dateStr, dateFromStr);
if (votingRecords.length === 0) {
console.log(`${INFO_PREFIX} Using placeholder voting records`);
votingRecords = fallback.votingRecords;
}
if (votingPatterns.length === 0) {
console.log(`${INFO_PREFIX} Using placeholder voting patterns`);
votingPatterns = fallback.votingPatterns;
}
if (anomalies.length === 0) {
console.log(`${INFO_PREFIX} Using placeholder voting anomalies`);
anomalies = fallback.anomalies;
}
Eif (questions.length === 0) {
console.log(`${INFO_PREFIX} Using placeholder parliamentary questions`);
questions = fallback.questions;
}
return { votingRecords, votingPatterns, anomalies, questions };
}
// ─── Propositions fetches ─────────────────────────────────────────────────────
/**
* Fetch legislative proposals from MCP and build pre-sanitised HTML.
*
* @param client - MCP client or null
* @returns Proposals HTML and the first procedure ID found (if any)
*/
export async function fetchProposalsFromMCP(
client: EuropeanParliamentMCPClient | null
): Promise<{ html: string; firstProcedureId: string }> {
if (!client) return { html: '', firstProcedureId: '' };
const docsResult = await callMCP(
() => client.searchDocuments({ keyword: 'legislative proposal', limit: 10 }),
undefined,
'search_documents(proposals)'
);
if (!docsResult?.content?.[0]) return { html: '', firstProcedureId: '' };
const data = parseJSON<{ documents?: Array<Partial<LegislativeDocument>> }>(
docsResult.content[0].text,
'proposals'
);
if (!data?.documents?.length) return { html: '', firstProcedureId: '' };
console.log(` ✅ Fetched ${data.documents.length} proposals from MCP`);
const firstProcedureId =
data.documents.find((d) => /\d{4}\/\d+\(.+\)/.test(d.id ?? ''))?.id ?? '';
const html = data.documents
.map(
(doc) => `
<div class="proposal-card">
<h3>${escapeHTML(doc.title ?? 'Legislative Proposal')}</h3>
<div class="proposal-meta">
${doc.id ? `<span class="proposal-id">${escapeHTML(doc.id)}</span>` : ''}
${doc.date ? `<span class="proposal-date">${escapeHTML(doc.date)}</span>` : ''}
${doc.status ? `<span class="proposal-status">${escapeHTML(doc.status)}</span>` : ''}
</div>
${doc.committee ? `<p class="proposal-committee">${escapeHTML(doc.committee)}</p>` : ''}
${doc.rapporteur ? `<p class="proposal-rapporteur">${escapeHTML(doc.rapporteur)}</p>` : ''}
</div>`
)
.join('');
return { html, firstProcedureId };
}
/**
* Fetch active legislative pipeline data from MCP.
*
* @param client - MCP client or null
* @returns Structured pipeline data or null when unavailable
*/
export async function fetchPipelineFromMCP(
client: EuropeanParliamentMCPClient | null
): Promise<PipelineData | null> {
if (!client) return null;
const pipelineResult = await callMCP(
() => client.monitorLegislativePipeline({ status: 'ACTIVE', limit: 5 }),
undefined,
'monitor_legislative_pipeline'
);
if (!pipelineResult?.content?.[0]) return null;
const pipeData = parseJSON<{
pipelineHealthScore?: number | undefined;
throughputRate?: number | undefined;
procedures?:
| Array<{
id?: string | undefined;
title?: string | undefined;
stage?: string | undefined;
}>
| undefined;
}>(pipelineResult.content[0].text, 'pipeline');
if (!pipeData) return null;
const healthScore = pipeData.pipelineHealthScore ?? 0;
const throughput = pipeData.throughputRate ?? 0;
const procRowsHtml =
pipeData.procedures
?.map(
(proc) => `
<div class="procedure-item">
${proc.id ? `<span class="procedure-id">${escapeHTML(proc.id)}</span>` : ''}
${proc.title ? `<span class="procedure-title">${escapeHTML(proc.title)}</span>` : ''}
${proc.stage ? `<span class="procedure-stage">${escapeHTML(proc.stage)}</span>` : ''}
</div>`
)
.join('') ?? '';
return { healthScore, throughput, procRowsHtml };
}
/**
* Fetch a specific procedure's tracked-status HTML from MCP.
* Returns empty string when `procedureId` is empty or MCP is unavailable.
*
* @param client - MCP client or null
* @param procedureId - Procedure ID (e.g. `"2024/0001(COD)"`)
* @returns HTML snippet for the procedure status section
*/
export async function fetchProcedureStatusFromMCP(
client: EuropeanParliamentMCPClient | null,
procedureId: string
): Promise<string> {
if (!procedureId || !client) return '';
try {
const result = await callMCP(
() => client.trackLegislation(procedureId),
undefined,
`track_legislation(${procedureId})`
);
if (!result?.content?.[0]) return '';
const raw = result.content[0].text;
return `<pre class="data-summary">${escapeHTML(raw.slice(0, 2000))}</pre>`;
} catch (error) {
const message = error instanceof Error ? error.message : String(error);
console.warn(`${WARN_PREFIX} track_legislation failed:`, message);
return '';
}
}
// ─── EP Feed-based fetches (Breaking News) ──────────────────────────────────
/**
* Parse a feed result from MCP into a flat array of items.
* EP API v2 feeds return items under the `data` key:
* `{ data: [{ id, type, work_type, identifier, label }], "@context": [...] }`
*
* Also handles legacy shapes (`feed`, `entries`, `items`) and bare arrays.
*
* @param result - Raw MCP tool result
* @returns Array of parsed feed entry objects (may be empty)
*/
function parseFeedResult(result: MCPToolResult | undefined): Record<string, unknown>[] {
if (!result?.content?.[0]?.text) return [];
const parsed = parseJSON<unknown>(result.content[0].text, 'feed');
if (!parsed) return [];
// EP API v2 feeds use `data` key; also check legacy shapes
const candidates = [
(parsed as Record<string, unknown>)['data'],
(parsed as Record<string, unknown>)['feed'],
(parsed as Record<string, unknown>)['entries'],
(parsed as Record<string, unknown>)['items'],
parsed,
];
for (const candidate of candidates) {
if (Array.isArray(candidate)) return candidate as Record<string, unknown>[];
}
return [];
}
/**
* Parse an EP API v2 feed response envelope in a single JSON parse, returning
* both the array of feed items and the API-reported total count.
* Avoids parsing the same JSON payload twice when both values are needed.
*
* @param result - Raw MCP tool result
* @returns Object with `items` array and `total` count from the API
*/
function parseFeedEnvelope(result: MCPToolResult | undefined): {
items: Record<string, unknown>[];
total: number;
} {
if (!result?.content?.[0]?.text) return { items: [], total: 0 };
const parsed = parseJSON<unknown>(result.content[0].text, 'feed');
Iif (!parsed || typeof parsed !== 'object') return { items: [], total: 0 };
const envelope = parsed as Record<string, unknown>;
const total = typeof envelope['total'] === 'number' ? envelope['total'] : 0;
const candidates = [
envelope['data'],
envelope['feed'],
envelope['entries'],
envelope['items'],
parsed,
];
for (const candidate of candidates) {
if (Array.isArray(candidate)) return { items: candidate as Record<string, unknown>[], total };
}
return { items: [], total };
}
/**
* Map a raw EP API v2 feed item to a normalized feed item.
* EP feeds return `{ id, type, work_type, identifier, label }` — we normalize
* these into the domain feed item shape, using `label` as `title` when no title exists.
*
* @param item - Raw feed item record
* @returns Common feed item fields
*/
function mapFeedItemBase(item: Record<string, unknown>): {
id: string;
title: string;
date: string;
type?: string | undefined;
url?: string | undefined;
identifier?: string | undefined;
label?: string | undefined;
} {
return {
id: String(item['id'] ?? item['docId'] ?? ''),
title: String(
item['title'] ?? item['label'] ?? item['name'] ?? item['identifier'] ?? 'Untitled'
),
date: String(item['date'] ?? item['published'] ?? item['updated'] ?? ''),
type: item['type']
? String(item['type'])
: item['work_type']
? String(item['work_type'])
: undefined,
url: item['url'] ? String(item['url']) : undefined,
identifier: item['identifier'] ? String(item['identifier']) : undefined,
label: item['label'] ? String(item['label']) : undefined,
};
}
/**
* Fetch adopted texts feed from MCP.
*
* @param client - MCP client or null
* @param timeframe - How far back to look (default: 'one-day')
* @returns Array of adopted text feed items
*/
export async function fetchAdoptedTextsFeed(
client: EuropeanParliamentMCPClient | null,
timeframe: FeedTimeframe = 'one-day'
): Promise<AdoptedTextFeedItem[]> {
if (!client) return [];
try {
console.log(`${MCP_FETCH_PREFIX} Fetching adopted texts feed (${timeframe})...`);
const result = await callMCP(
() => client.getAdoptedTextsFeed({ timeframe, limit: 20 }),
undefined,
'get_adopted_texts_feed'
);
return parseFeedResult(result).map((item) => mapFeedItemBase(item));
} catch (error) {
const message = error instanceof Error ? error.message : String(error);
console.warn(`${WARN_PREFIX} get_adopted_texts_feed failed:`, message);
return [];
}
}
/**
* Fetch events feed from MCP.
*
* @param client - MCP client or null
* @param timeframe - How far back to look (default: 'one-day')
* @returns Array of event feed items
*/
export async function fetchEventsFeed(
client: EuropeanParliamentMCPClient | null,
timeframe: FeedTimeframe = 'one-day'
): Promise<EventFeedItem[]> {
if (!client) return [];
try {
console.log(`${MCP_FETCH_PREFIX} Fetching events feed (${timeframe})...`);
const result = await callMCP(
() => client.getEventsFeed({ timeframe, limit: 20 }),
undefined,
'get_events_feed'
);
return parseFeedResult(result).map((item) => ({
...mapFeedItemBase(item),
location: item['location'] ? String(item['location']) : undefined,
}));
} catch (error) {
const message = error instanceof Error ? error.message : String(error);
console.warn(`${WARN_PREFIX} get_events_feed failed:`, message);
return [];
}
}
/**
* Fetch procedures feed from MCP.
*
* @param client - MCP client or null
* @param timeframe - How far back to look (default: 'one-day')
* @returns Array of procedure feed items
*/
export async function fetchProceduresFeed(
client: EuropeanParliamentMCPClient | null,
timeframe: FeedTimeframe = 'one-day'
): Promise<ProcedureFeedItem[]> {
if (!client) return [];
try {
console.log(`${MCP_FETCH_PREFIX} Fetching procedures feed (${timeframe})...`);
const result = await callMCP(
() => client.getProceduresFeed({ timeframe, limit: 20 }),
undefined,
'get_procedures_feed'
);
return parseFeedResult(result).map((item) => ({
...mapFeedItemBase(item),
stage: item['stage'] ? String(item['stage']) : undefined,
}));
} catch (error) {
const message = error instanceof Error ? error.message : String(error);
console.warn(`${WARN_PREFIX} get_procedures_feed failed:`, message);
return [];
}
}
/**
* Fetch MEPs feed from MCP.
*
* @param client - MCP client or null
* @param timeframe - How far back to look (default: 'one-day')
* @returns Array of MEP feed items
*/
export async function fetchMEPsFeed(
client: EuropeanParliamentMCPClient | null,
timeframe: FeedTimeframe = 'one-day'
): Promise<MEPFeedItem[]> {
return (await fetchMEPsFeedWithTotal(client, timeframe)).items;
}
/**
* Fetch MEPs feed from MCP, returning both items and the API's reported total count.
* The `total` from the API response reflects all matching records in the feed,
* which may exceed the `limit` parameter (currently capped at 100 per request).
*
* The limit is set to 100 (the EP API maximum) so the fetched sample is large
* enough to populate a meaningful truncation note ("showing 10 of N") while
* keeping each request bounded. When the feed contains more than 100 MEP
* updates, the `total` field in the API response carries the true count.
*
* @param client - MCP client or null
* @param timeframe - How far back to look (default: 'one-day')
* @returns Object with `items` array and `total` count from the API
*/
export async function fetchMEPsFeedWithTotal(
client: EuropeanParliamentMCPClient | null,
timeframe: FeedTimeframe = 'one-day'
): Promise<{ items: MEPFeedItem[]; total: number }> {
if (!client) return { items: [], total: 0 };
try {
console.log(`${MCP_FETCH_PREFIX} Fetching MEPs feed (${timeframe})...`);
const result = await callMCP(
() => client.getMEPsFeed({ timeframe, limit: 100 }),
undefined,
'get_meps_feed'
);
const { items: rawItems, total } = parseFeedEnvelope(result);
const items = rawItems.map((item) => ({
id: String(item['id'] ?? item['mepId'] ?? ''),
name: String(item['name'] ?? item['label'] ?? item['title'] ?? 'Unknown'),
date: String(item['date'] ?? item['published'] ?? item['updated'] ?? ''),
country: item['country'] ? String(item['country']) : undefined,
group: item['group'] ? String(item['group']) : undefined,
url: item['url'] ? String(item['url']) : undefined,
identifier: item['identifier'] ? String(item['identifier']) : undefined,
label: item['label'] ? String(item['label']) : undefined,
}));
return { items, total };
} catch (error) {
const message = error instanceof Error ? error.message : String(error);
console.warn(`${WARN_PREFIX} get_meps_feed failed:`, message);
return { items: [], total: 0 };
}
}
/**
* Fetch documents feed from MCP.
*
* @param client - MCP client or null
* @param timeframe - How far back to look (default: 'one-day')
* @returns Array of document feed items
*/
export async function fetchDocumentsFeed(
client: EuropeanParliamentMCPClient | null,
timeframe: FeedTimeframe = 'one-day'
): Promise<DocumentFeedItem[]> {
Eif (!client) return [];
try {
console.log(`${MCP_FETCH_PREFIX} Fetching documents feed (${timeframe})...`);
const result = await callMCP(
() => client.getDocumentsFeed({ timeframe, limit: 20 }),
undefined,
'get_documents_feed'
);
return parseFeedResult(result).map((item) => mapFeedItemBase(item));
} catch (error) {
const message = error instanceof Error ? error.message : String(error);
console.warn(`${WARN_PREFIX} get_documents_feed failed:`, message);
return [];
}
}
/**
* Fetch plenary documents feed from MCP.
*
* @param client - MCP client or null
* @param timeframe - How far back to look (default: 'one-day')
* @returns Array of document feed items
*/
export async function fetchPlenaryDocumentsFeed(
client: EuropeanParliamentMCPClient | null,
timeframe: FeedTimeframe = 'one-day'
): Promise<DocumentFeedItem[]> {
Eif (!client) return [];
try {
console.log(`${MCP_FETCH_PREFIX} Fetching plenary documents feed (${timeframe})...`);
const result = await callMCP(
() => client.getPlenaryDocumentsFeed({ timeframe, limit: 20 }),
undefined,
'get_plenary_documents_feed'
);
return parseFeedResult(result).map((item) => mapFeedItemBase(item));
} catch (error) {
const message = error instanceof Error ? error.message : String(error);
console.warn(`${WARN_PREFIX} get_plenary_documents_feed failed:`, message);
return [];
}
}
/**
* Fetch committee documents feed from MCP.
*
* @param client - MCP client or null
* @param timeframe - How far back to look (default: 'one-day')
* @returns Array of document feed items
*/
export async function fetchCommitteeDocumentsFeed(
client: EuropeanParliamentMCPClient | null,
timeframe: FeedTimeframe = 'one-day'
): Promise<DocumentFeedItem[]> {
Eif (!client) return [];
try {
console.log(`${MCP_FETCH_PREFIX} Fetching committee documents feed (${timeframe})...`);
const result = await callMCP(
() => client.getCommitteeDocumentsFeed({ timeframe, limit: 20 }),
undefined,
'get_committee_documents_feed'
);
return parseFeedResult(result).map((item) => mapFeedItemBase(item));
} catch (error) {
const message = error instanceof Error ? error.message : String(error);
console.warn(`${WARN_PREFIX} get_committee_documents_feed failed:`, message);
return [];
}
}
/**
* Fetch plenary session documents feed from MCP.
*
* @param client - MCP client or null
* @param timeframe - How far back to look (default: 'one-day')
* @returns Array of document feed items
*/
export async function fetchPlenarySessionDocumentsFeed(
client: EuropeanParliamentMCPClient | null,
timeframe: FeedTimeframe = 'one-day'
): Promise<DocumentFeedItem[]> {
Eif (!client) return [];
try {
console.log(`${MCP_FETCH_PREFIX} Fetching plenary session documents feed (${timeframe})...`);
const result = await callMCP(
() => client.getPlenarySessionDocumentsFeed({ timeframe, limit: 20 }),
undefined,
'get_plenary_session_documents_feed'
);
return parseFeedResult(result).map((item) => mapFeedItemBase(item));
} catch (error) {
const message = error instanceof Error ? error.message : String(error);
console.warn(`${WARN_PREFIX} get_plenary_session_documents_feed failed:`, message);
return [];
}
}
/**
* Fetch external documents feed from MCP.
*
* @param client - MCP client or null
* @param timeframe - How far back to look (default: 'one-day')
* @returns Array of document feed items
*/
export async function fetchExternalDocumentsFeed(
client: EuropeanParliamentMCPClient | null,
timeframe: FeedTimeframe = 'one-day'
): Promise<DocumentFeedItem[]> {
Eif (!client) return [];
try {
console.log(`${MCP_FETCH_PREFIX} Fetching external documents feed (${timeframe})...`);
const result = await callMCP(
() => client.getExternalDocumentsFeed({ timeframe, limit: 20 }),
undefined,
'get_external_documents_feed'
);
return parseFeedResult(result).map((item) => mapFeedItemBase(item));
} catch (error) {
const message = error instanceof Error ? error.message : String(error);
console.warn(`${WARN_PREFIX} get_external_documents_feed failed:`, message);
return [];
}
}
/**
* Fetch parliamentary questions feed from MCP.
*
* @param client - MCP client or null
* @param timeframe - How far back to look (default: 'one-day')
* @returns Array of question feed items
*/
export async function fetchQuestionsFeed(
client: EuropeanParliamentMCPClient | null,
timeframe: FeedTimeframe = 'one-day'
): Promise<QuestionFeedItem[]> {
Eif (!client) return [];
try {
console.log(`${MCP_FETCH_PREFIX} Fetching parliamentary questions feed (${timeframe})...`);
const result = await callMCP(
() => client.getParliamentaryQuestionsFeed({ timeframe, limit: 20 }),
undefined,
'get_parliamentary_questions_feed'
);
return parseFeedResult(result).map((item) => mapFeedItemBase(item));
} catch (error) {
const message = error instanceof Error ? error.message : String(error);
console.warn(`${WARN_PREFIX} get_parliamentary_questions_feed failed:`, message);
return [];
}
}
/**
* Fetch MEP declarations feed from MCP.
*
* @param client - MCP client or null
* @param timeframe - How far back to look (default: 'one-day')
* @returns Array of declaration feed items
*/
export async function fetchDeclarationsFeed(
client: EuropeanParliamentMCPClient | null,
timeframe: FeedTimeframe = 'one-day'
): Promise<DeclarationFeedItem[]> {
Eif (!client) return [];
try {
console.log(`${MCP_FETCH_PREFIX} Fetching MEP declarations feed (${timeframe})...`);
const result = await callMCP(
() => client.getMEPDeclarationsFeed({ timeframe, limit: 20 }),
undefined,
'get_mep_declarations_feed'
);
return parseFeedResult(result).map((item) => mapFeedItemBase(item));
} catch (error) {
const message = error instanceof Error ? error.message : String(error);
console.warn(`${WARN_PREFIX} get_mep_declarations_feed failed:`, message);
return [];
}
}
/**
* Fetch corporate bodies feed from MCP.
*
* @param client - MCP client or null
* @param timeframe - How far back to look (default: 'one-day')
* @returns Array of corporate body feed items
*/
export async function fetchCorporateBodiesFeed(
client: EuropeanParliamentMCPClient | null,
timeframe: FeedTimeframe = 'one-day'
): Promise<CorporateBodyFeedItem[]> {
Eif (!client) return [];
try {
console.log(`${MCP_FETCH_PREFIX} Fetching corporate bodies feed (${timeframe})...`);
const result = await callMCP(
() => client.getCorporateBodiesFeed({ timeframe, limit: 20 }),
undefined,
'get_corporate_bodies_feed'
);
return parseFeedResult(result).map((item) => mapFeedItemBase(item));
} catch (error) {
const message = error instanceof Error ? error.message : String(error);
console.warn(`${WARN_PREFIX} get_corporate_bodies_feed failed:`, message);
return [];
}
}
/**
* Fetch all EP feed data for breaking news articles.
* Calls adopted texts, events, procedures, and MEPs feeds in parallel.
* Returns `undefined` when client is null (MCP unavailable).
*
* @param client - MCP client or null
* @param timeframe - How far back to look (default: 'one-day')
* @returns Aggregated feed data for breaking news, or undefined when client is null
*/
export async function fetchBreakingNewsFeedData(
client: EuropeanParliamentMCPClient | null,
timeframe: FeedTimeframe = 'one-day'
): Promise<BreakingNewsFeedData | undefined> {
if (!client) return undefined;
if (!mcpCircuitBreaker.canRequest()) {
console.warn(
`${WARN_PREFIX} Circuit breaker OPEN — treating as MCP unavailable for breaking news feeds`
);
return undefined;
}
const [adoptedTexts, events, procedures, mepFeedResult] = await Promise.all([
fetchAdoptedTextsFeed(client, timeframe),
fetchEventsFeed(client, timeframe),
fetchProceduresFeed(client, timeframe),
fetchMEPsFeedWithTotal(client, timeframe),
]);
const { items: mepUpdates, total: totalMEPUpdates } = mepFeedResult;
return {
adoptedTexts,
events,
procedures,
mepUpdates,
totalMEPUpdates: totalMEPUpdates > 0 ? totalMEPUpdates : undefined,
};
}
/**
* Fetch comprehensive EP feed data from all 12 feed endpoints in parallel.
* This is the primary data source for all article strategies.
*
* @param client - MCP client or null
* @param timeframe - How far back to look (default: 'one-day')
* @param dateRange - Optional inclusive UTC window for filtering feed items
* @returns Full EPFeedData or undefined when client is null
*/
export async function fetchEPFeedData(
client: EuropeanParliamentMCPClient | null,
timeframe: FeedTimeframe = 'one-day',
dateRange?: DateRange
): Promise<EPFeedData | undefined> {
// Check for pre-fetched feed data file (set by --feed-data CLI arg).
// This allows agentic workflows to pass MCP data fetched via framework tools
// into the generator without requiring a direct MCP connection.
const feedDataFile = process.env['EP_FEED_DATA_FILE'];
if (feedDataFile) {
const fileData = loadEPFeedDataFromFile(feedDataFile, dateRange);
if (fileData) return fileData;
console.log(
`${WARN_PREFIX} Pre-fetched EP feed data failed to load — falling through to MCP fetch`
);
}
if (!client) return undefined;
Eif (!mcpCircuitBreaker.canRequest()) {
console.warn(`${WARN_PREFIX} Circuit breaker OPEN — treating as MCP unavailable for EP feeds`);
return undefined;
}
console.log(`${MCP_FETCH_PREFIX} Fetching comprehensive EP feed data (${timeframe})...`);
const [
adoptedTexts,
events,
procedures,
mepUpdates,
documents,
plenaryDocuments,
committeeDocuments,
plenarySessionDocuments,
externalDocuments,
questions,
declarations,
corporateBodies,
] = await Promise.all([
fetchAdoptedTextsFeed(client, timeframe),
fetchEventsFeed(client, timeframe),
fetchProceduresFeed(client, timeframe),
fetchMEPsFeed(client, timeframe),
fetchDocumentsFeed(client, timeframe),
fetchPlenaryDocumentsFeed(client, timeframe),
fetchCommitteeDocumentsFeed(client, timeframe),
fetchPlenarySessionDocumentsFeed(client, timeframe),
fetchExternalDocumentsFeed(client, timeframe),
fetchQuestionsFeed(client, timeframe),
fetchDeclarationsFeed(client, timeframe),
fetchCorporateBodiesFeed(client, timeframe),
]);
const filteredData = filterEPFeedDataByDateRange(
{
adoptedTexts,
events,
procedures,
mepUpdates,
documents,
plenaryDocuments,
committeeDocuments,
plenarySessionDocuments,
externalDocuments,
questions,
declarations,
corporateBodies,
},
dateRange
);
const totalItems =
filteredData.adoptedTexts.length +
filteredData.events.length +
filteredData.procedures.length +
filteredData.mepUpdates.length +
filteredData.documents.length +
filteredData.plenaryDocuments.length +
filteredData.committeeDocuments.length +
filteredData.plenarySessionDocuments.length +
filteredData.externalDocuments.length +
filteredData.questions.length +
filteredData.declarations.length +
filteredData.corporateBodies.length;
console.log(` ✅ Fetched ${totalItems} total feed items across 12 endpoints`);
return filteredData;
}
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