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// SPDX-License-Identifier: Apache-2.0
/**
* @module Generators/Strategies/MonthlyReviewStrategy
* @description Article strategy for the Month In Review article type.
* Fetches voting records, voting patterns, voting anomalies, and
* parliamentary questions from the past 30 days, then renders a
* comprehensive retrospective analysis article.
*/
import type { EuropeanParliamentMCPClient } from '../../mcp/ep-mcp-client.js';
import { ArticleCategory } from '../../types/index.js';
import type {
LanguageCode,
DateRange,
VotingRecord,
VotingPattern,
VotingAnomaly,
MotionsQuestion,
EPFeedData,
} from '../../types/index.js';
import { MONTHLY_REVIEW_TITLES, getLocalizedString } from '../../constants/languages.js';
import {
fetchVotingRecords,
fetchVotingPatterns,
fetchMotionsAnomalies,
fetchParliamentaryQuestionsForMotions,
fetchEPFeedData,
} from '../pipeline/fetch-stage.js';
import { generateMotionsContent } from '../motions-content.js';
import { buildDeepAnalysisSection } from '../deep-analysis-content.js';
import {
buildVotingAnalysis,
buildVotingSwot,
buildVotingDashboard,
buildVotingMindmap,
} from '../analysis-builders.js';
import { buildSwotSection } from '../swot-content.js';
import { buildDashboardSection } from '../dashboard-content.js';
import { buildIntelligenceMindmapSection } from '../mindmap-content.js';
import type { ArticleStrategy, ArticleData, ArticleMetadata } from './article-strategy.js';
import { pl } from '../../utils/metadata-utils.js';
// ─── Data payload ─────────────────────────────────────────────────────────────
/** Data fetched and pre-processed by {@link MonthlyReviewStrategy} */
export interface MonthlyReviewArticleData extends ArticleData {
/** Review period date range (30 days) */
readonly dateRange: DateRange;
/** Voting records from the review period */
readonly votingRecords: readonly VotingRecord[];
/** Voting patterns analysis */
readonly votingPatterns: readonly VotingPattern[];
/** Detected voting anomalies */
readonly anomalies: readonly VotingAnomaly[];
/** Parliamentary questions from the period */
readonly questions: readonly MotionsQuestion[];
/** Start date string for display */
readonly dateFromStr: string;
/** Display label for the review month */
readonly monthLabel: string;
/** EP feed data for enrichment (when available) */
readonly feedData?: EPFeedData | undefined;
}
/** Base keywords shared by all Monthly Review articles */
const MONTHLY_REVIEW_BASE_KEYWORDS = [
'European Parliament',
'monthly review',
'legislative output',
'coalition dynamics',
] as const;
/**
* Extract content-aware keywords from monthly review data.
*
* @param data - Monthly review article data payload
* @returns Deduplicated keyword array
*/
function buildMonthlyReviewKeywords(data: MonthlyReviewArticleData): string[] {
const keywords: string[] = [...MONTHLY_REVIEW_BASE_KEYWORDS];
for (const r of data.votingRecords.slice(0, 5)) {
Eif (r.title) keywords.push(r.title.slice(0, 60));
}
for (const a of data.anomalies.slice(0, 3)) {
Eif (a.type) keywords.push(a.type);
}
for (const q of data.questions.slice(0, 3)) {
Eif (q.topic) keywords.push(q.topic);
}
return [...new Set(keywords)];
}
/**
* Build a content-aware description from monthly review data.
*
* @param data - Monthly review article data payload
* @returns SEO-friendly description (≤ 200 chars)
*/
function buildMonthlyReviewDescription(data: MonthlyReviewArticleData): string {
const parts: string[] = [];
if (data.votingRecords.length > 0)
parts.push(`${pl(data.votingRecords.length, 'vote', 'votes')} analysed`);
if (data.anomalies.length > 0)
parts.push(pl(data.anomalies.length, 'voting anomaly', 'voting anomalies'));
if (data.questions.length > 0)
parts.push(`${pl(data.questions.length, 'question', 'questions')} tabled`);
if (parts.length === 0) {
return `European Parliament monthly review for ${data.monthLabel} — legislative output and coalition dynamics.`;
}
const highlight = data.votingRecords[0]?.title ?? '';
const base = `EP month in review (${data.monthLabel}): ${parts.join(', ')}`;
if (highlight) {
const full = `${base}. Key: ${highlight}`;
return full.length > 200 ? full.slice(0, 197) + '...' : full;
}
return base.length > 200 ? base.slice(0, 197) + '...' : base;
}
/**
* Build a content-aware title suffix from monthly review data counts.
*
* @param data - Monthly review article data payload
* @returns Short suffix for the title, or empty string
*/
function buildMonthlyReviewTitleSuffix(data: MonthlyReviewArticleData): string {
const parts: string[] = [];
if (data.votingRecords.length > 0) parts.push(pl(data.votingRecords.length, 'Vote', 'Votes'));
if (data.anomalies.length > 0) parts.push(pl(data.anomalies.length, 'Anomaly', 'Anomalies'));
return parts.join(', ');
}
// ─── Date-range helper ────────────────────────────────────────────────────────
/**
* Compute the review period covering the 30 days ending on `baseDate`.
*
* @param baseDate - ISO 8601 publication date (YYYY-MM-DD)
* @returns Date range covering the past 30 days
*/
function computeMonthlyReviewDateRange(baseDate: string): DateRange {
const end = new Date(`${baseDate}T00:00:00Z`);
const start = new Date(end);
start.setUTCDate(end.getUTCDate() - 30);
const startParts = start.toISOString().split('T');
const endParts = end.toISOString().split('T');
Iif (!startParts[0] || !endParts[0]) {
throw new Error('Invalid date format generated in computeMonthlyReviewDateRange');
}
return {
start: startParts[0],
end: endParts[0],
};
}
/**
* Format a month label from a date string (e.g. "February 2026").
*
* @param dateStr - ISO 8601 date
* @returns Human-readable month label, using the runtime's default locale
*/
function formatMonthLabel(dateStr: string): string {
const date = new Date(`${dateStr}T00:00:00Z`);
return date.toLocaleDateString(undefined, { month: 'long', year: 'numeric', timeZone: 'UTC' });
}
// ─── Strategy implementation ──────────────────────────────────────────────────
/**
* Article strategy for {@link ArticleCategory.MONTH_IN_REVIEW}.
* Fetches voting records, anomalies, patterns, and questions for the
* past 30 days and builds a comprehensive retrospective analysis.
*/
export class MonthlyReviewStrategy implements ArticleStrategy<MonthlyReviewArticleData> {
readonly type = ArticleCategory.MONTH_IN_REVIEW;
readonly requiredMCPTools = [
'get_voting_records',
'analyze_voting_patterns',
'detect_voting_anomalies',
'get_parliamentary_questions',
'get_adopted_texts_feed',
'get_procedures_feed',
'get_events_feed',
] as const;
/**
* Fetch monthly review data from MCP.
*
* @param client - MCP client or null
* @param date - ISO 8601 publication date
* @returns Populated monthly review data payload
*/
async fetchData(
client: EuropeanParliamentMCPClient | null,
date: string
): Promise<MonthlyReviewArticleData> {
const dateRange = computeMonthlyReviewDateRange(date);
console.log(` 📊 Monthly review range: ${dateRange.start} to ${dateRange.end}`);
// Fetch voting data and EP feed data in parallel
const [votingRecords, votingPatterns, anomalies, questions, feedData] = await Promise.all([
fetchVotingRecords(client, dateRange.start, dateRange.end),
fetchVotingPatterns(client, dateRange.start, dateRange.end),
fetchMotionsAnomalies(client, dateRange.start, dateRange.end),
fetchParliamentaryQuestionsForMotions(client, dateRange.start, dateRange.end),
fetchEPFeedData(client, 'one-month', dateRange),
]);
const monthLabel = formatMonthLabel(dateRange.start);
return {
date,
dateRange,
dateFromStr: dateRange.start,
votingRecords,
votingPatterns,
anomalies,
questions,
monthLabel,
feedData,
};
}
/**
* Build the monthly review HTML body for the specified language.
*
* @param data - Monthly review data payload
* @param lang - Target language code used for editorial strings
* @returns Article HTML body
*/
buildContent(data: MonthlyReviewArticleData, lang: LanguageCode): string {
const base = generateMotionsContent(
data.dateRange.start,
data.dateRange.end,
[...data.votingRecords],
[...data.votingPatterns],
[...data.anomalies],
[...data.questions],
lang
);
const analysis = buildVotingAnalysis(
data.dateRange.start,
data.dateRange.end,
data.votingRecords,
data.votingPatterns,
data.anomalies,
data.questions
);
const deepSection = buildDeepAnalysisSection(analysis, lang, 'en');
const mindmapData = buildVotingMindmap(
data.votingRecords,
data.votingPatterns,
data.anomalies,
lang
);
const mindmapSection = buildIntelligenceMindmapSection(mindmapData, lang);
const swotData = buildVotingSwot(data.votingRecords, data.votingPatterns, data.anomalies, lang);
const swotSection = buildSwotSection(swotData, lang);
const dashboardData = buildVotingDashboard(
data.votingRecords,
data.votingPatterns,
data.anomalies,
lang
);
const dashboardSection = buildDashboardSection(dashboardData, lang);
return base.replace(
'<!-- /article-content -->',
deepSection + mindmapSection + swotSection + dashboardSection
);
}
/**
* Return language-specific metadata for the monthly review article.
*
* @param data - Monthly review data payload
* @param lang - Target language code
* @returns Localised metadata
*/
getMetadata(data: MonthlyReviewArticleData, lang: LanguageCode): ArticleMetadata {
const titleFn = getLocalizedString(MONTHLY_REVIEW_TITLES, lang);
const { title: baseTitle, subtitle: baseSubtitle } = titleFn(data.monthLabel);
const suffix = lang === 'en' ? buildMonthlyReviewTitleSuffix(data) : '';
const title = suffix ? `${baseTitle} — ${suffix}` : baseTitle;
const description = lang === 'en' ? buildMonthlyReviewDescription(data) : '';
const subtitle = description || baseSubtitle;
return {
title,
subtitle,
keywords: buildMonthlyReviewKeywords(data),
category: ArticleCategory.MONTH_IN_REVIEW,
sources: [],
};
}
}
/** Singleton instance for use by the strategy registry */
export const monthlyReviewStrategy = new MonthlyReviewStrategy();
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