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// SPDX-License-Identifier: Apache-2.0
/**
* @module Generators/Strategies/BreakingNewsStrategy
* @description Article strategy for the Breaking News article type.
* Uses a **feed-first** approach: EP feed endpoints (adopted texts, events,
* procedures, MEPs) provide the primary news content, while analytical tools
* (voting anomalies, coalition dynamics) supply optional context only.
*
* Precomputed statistics from `get_all_generated_stats` are **never** the
* primary news content and are used solely for historical comparison.
*/
import type { EuropeanParliamentMCPClient } from '../../mcp/ep-mcp-client.js';
import { ArticleCategory } from '../../types/index.js';
import type { LanguageCode, BreakingNewsFeedData } from '../../types/index.js';
import { BREAKING_NEWS_TITLES, getLocalizedString } from '../../constants/languages.js';
import {
fetchBreakingNewsFeedData,
fetchVotingAnomalies,
fetchCoalitionDynamics,
loadFeedDataFromFile,
} from '../pipeline/fetch-stage.js';
import { buildBreakingNewsContent } from '../breaking-content.js';
import { buildDeepAnalysisSection } from '../deep-analysis-content.js';
import {
buildBreakingAnalysis,
buildBreakingSwot,
buildBreakingDashboard,
} from '../analysis-builders.js';
import { buildSwotSection } from '../swot-content.js';
import { buildDashboardSection } from '../dashboard-content.js';
import type { ArticleStrategy, ArticleData, ArticleMetadata } from './article-strategy.js';
/** Keywords shared by all Breaking News articles */
const BREAKING_NEWS_KEYWORDS = [
'European Parliament',
'breaking news',
'adopted texts',
'legislative updates',
'parliamentary events',
] as const;
// ─── Data payload ─────────────────────────────────────────────────────────────
/** Data fetched and pre-processed by {@link BreakingNewsStrategy} */
export interface BreakingNewsArticleData extends ArticleData {
/** Feed data — adopted texts, events, procedures, MEP updates (PRIMARY). Undefined when MCP unavailable. */
readonly feedData: BreakingNewsFeedData | undefined;
/** Raw voting anomaly text from MCP (CONTEXT ONLY) */
readonly anomalyRaw: string;
/** Raw coalition dynamics text from MCP (CONTEXT ONLY) */
readonly coalitionRaw: string;
/** Raw voting statistics report text from MCP (KEPT FOR BACKWARD COMPAT) */
readonly reportRaw: string;
}
// ─── Strategy implementation ──────────────────────────────────────────────────
/**
* Article strategy for {@link ArticleCategory.BREAKING_NEWS}.
*
* **Feed-first**: EP feed endpoints are the primary data source.
* Analytical tools provide supplementary context only.
* Stats are NEVER the news itself.
*/
export class BreakingNewsStrategy implements ArticleStrategy<BreakingNewsArticleData> {
readonly type = ArticleCategory.BREAKING_NEWS;
readonly requiredMCPTools = [
'get_adopted_texts_feed',
'get_events_feed',
'get_procedures_feed',
'get_meps_feed',
'detect_voting_anomalies',
'analyze_coalition_dynamics',
] as const;
/**
* Fetch EP feed data (primary) first, then conditionally fetch analytical
* context (secondary) in a second phase.
*
* @param client - MCP client or null
* @param date - ISO 8601 publication date
* @returns Populated breaking news data payload
*/
async fetchData(
client: EuropeanParliamentMCPClient | null,
date: string
): Promise<BreakingNewsArticleData> {
// Step 0: 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) {
console.log(` 📂 Loading pre-fetched feed data from: ${feedDataFile}`);
const fileFeedData = loadFeedDataFromFile(feedDataFile, { start: date, end: date });
if (fileFeedData) {
const totalItems =
fileFeedData.adoptedTexts.length +
fileFeedData.events.length +
fileFeedData.procedures.length +
fileFeedData.mepUpdates.length;
console.log(` 📰 Pre-fetched feed data: ${totalItems} total items`);
// Fetch analytical context from MCP if client available, else skip
let anomalyRaw = '';
let coalitionRaw = '';
Iif (client && totalItems > 0) {
[anomalyRaw, coalitionRaw] = await Promise.all([
fetchVotingAnomalies(client),
fetchCoalitionDynamics(client),
]);
}
return { date, feedData: fileFeedData, anomalyRaw, coalitionRaw, reportRaw: '' };
}
console.log(' ⚠️ Pre-fetched feed data failed to load — falling through to MCP fetch');
}
if (client) {
console.log(' 📡 Fetching EP feed data (primary) and analytical context...');
}
// Step 1: Fetch feed data (PRIMARY news content) — 'today' for realtime breaking news
const feedData = await fetchBreakingNewsFeedData(client, 'today');
// When client is null, feedData is undefined — MCP unavailable
if (!feedData) {
console.log(' ⚠️ MCP unavailable — no feed data or analytical context');
return { date, feedData, anomalyRaw: '', coalitionRaw: '', reportRaw: '' };
}
const totalFeedItems =
feedData.adoptedTexts.length +
feedData.events.length +
feedData.procedures.length +
feedData.mepUpdates.length;
Iif (totalFeedItems > 0) {
console.log(
` 📰 Feed data: ${feedData.adoptedTexts.length} adopted texts, ` +
`${feedData.events.length} events, ${feedData.procedures.length} procedures, ` +
`${feedData.mepUpdates.length} MEP updates`
);
} else {
console.log(' ⚠️ No feed data available — skipping analytical context fetch');
return { date, feedData, anomalyRaw: '', coalitionRaw: '', reportRaw: '' };
}
// Step 2: Fetch analytical context only when at least one feed item is available
const [anomalyRaw, coalitionRaw] = await Promise.all([
fetchVotingAnomalies(client),
fetchCoalitionDynamics(client),
]);
return { date, feedData, anomalyRaw, coalitionRaw, reportRaw: '' };
}
/**
* Build the breaking news HTML body for the specified language.
*
* @param data - Breaking news data payload
* @param lang - Target language code used for editorial strings
* @returns Article HTML body
*/
buildContent(data: BreakingNewsArticleData, lang: LanguageCode): string {
const base = buildBreakingNewsContent(
data.date,
data.anomalyRaw,
data.coalitionRaw,
data.reportRaw,
'',
lang,
[],
[],
[],
data.feedData
);
const analysis = buildBreakingAnalysis(
data.date,
data.feedData,
data.anomalyRaw,
data.coalitionRaw,
lang
);
const deepSection = buildDeepAnalysisSection(analysis, lang);
const swotData = buildBreakingSwot(data.feedData, data.anomalyRaw, data.coalitionRaw, lang);
const swotSection = buildSwotSection(swotData, lang);
const dashboardData = buildBreakingDashboard(data.feedData, lang);
const dashboardSection = buildDashboardSection(dashboardData, lang);
const injection = deepSection + swotSection + dashboardSection;
// Inject before the closing </div> of .article-content
Eif (injection) {
const closingTag = '</div>';
const lastIdx = base.lastIndexOf(closingTag);
Eif (lastIdx !== -1) {
return base.slice(0, lastIdx) + injection + '\n' + base.slice(lastIdx);
}
}
return base;
}
/**
* Return language-specific metadata for the breaking news article.
*
* @param data - Breaking news data payload
* @param lang - Target language code
* @returns Localised metadata
*/
getMetadata(data: BreakingNewsArticleData, lang: LanguageCode): ArticleMetadata {
const titleFn = getLocalizedString(BREAKING_NEWS_TITLES, lang);
const { title, subtitle } = titleFn(data.date);
return {
title,
subtitle,
keywords: [...BREAKING_NEWS_KEYWORDS],
category: ArticleCategory.BREAKING_NEWS,
sources: [],
};
}
}
/** Singleton instance for use by the strategy registry */
export const breakingNewsStrategy = new BreakingNewsStrategy();
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