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// SPDX-License-Identifier: Apache-2.0
/**
* @module Generators/Strategies/WeekAheadStrategy
* @description Article strategy for the Week Ahead article type.
* Fetches plenary sessions, committee meetings, documents, pipeline and
* parliamentary questions then renders a forward-looking HTML article.
*/
import type { EuropeanParliamentMCPClient } from '../../mcp/ep-mcp-client.js';
import { ArticleCategory } from '../../types/index.js';
import type { LanguageCode, DateRange, WeekAheadData } from '../../types/index.js';
import { WEEK_AHEAD_TITLES, getLocalizedString } from '../../constants/languages.js';
import { fetchWeekAheadData } from '../pipeline/fetch-stage.js';
import {
buildWeekAheadContent,
buildKeywords,
buildWhatToWatchSection,
} from '../week-ahead-content.js';
import type { ArticleStrategy, ArticleData, ArticleMetadata } from './article-strategy.js';
// ─── Data payload ─────────────────────────────────────────────────────────────
/** Data fetched and pre-processed by {@link WeekAheadStrategy} */
export interface WeekAheadArticleData extends ArticleData {
/** Week-ahead date range */
readonly dateRange: DateRange;
/** Aggregated week-ahead domain data */
readonly weekData: WeekAheadData;
/** SEO keywords derived from the week-ahead data */
readonly keywords: readonly string[];
}
// ─── Date-range helper ────────────────────────────────────────────────────────
/**
* Compute the week-ahead date range starting the day after `baseDate`.
*
* @param baseDate - ISO 8601 publication date (YYYY-MM-DD)
* @returns Date range spanning the next 7 days
*/
function computeWeekAheadDateRange(baseDate: string): DateRange {
const base = new Date(`${baseDate}T00:00:00Z`);
const startDate = new Date(base);
startDate.setUTCDate(base.getUTCDate() + 1);
const endDate = new Date(startDate);
endDate.setUTCDate(startDate.getUTCDate() + 7);
const startParts = startDate.toISOString().split('T');
const endParts = endDate.toISOString().split('T');
Iif (!startParts[0] || !endParts[0]) {
throw new Error('Invalid date format generated in computeWeekAheadDateRange');
}
return {
start: startParts[0],
end: endParts[0],
};
}
// ─── Strategy implementation ──────────────────────────────────────────────────
/**
* Article strategy for {@link ArticleCategory.WEEK_AHEAD}.
* Fetches plenary, committee, document, pipeline and question data then builds
* a forward-looking preview of the upcoming parliamentary week.
*/
export class WeekAheadStrategy implements ArticleStrategy<WeekAheadArticleData> {
readonly type = ArticleCategory.WEEK_AHEAD;
readonly requiredMCPTools = [
'get_plenary_sessions',
'get_committee_info',
'search_documents',
'monitor_legislative_pipeline',
'get_parliamentary_questions',
'get_events',
] as const;
/**
* Fetch week-ahead data from MCP.
*
* @param client - MCP client or null
* @param date - ISO 8601 publication date
* @returns Populated week-ahead data payload
*/
async fetchData(
client: EuropeanParliamentMCPClient | null,
date: string
): Promise<WeekAheadArticleData> {
const dateRange = computeWeekAheadDateRange(date);
console.log(` 📆 Date range: ${dateRange.start} to ${dateRange.end}`);
const weekData = await fetchWeekAheadData(client, dateRange);
const keywords = buildKeywords(weekData);
return { date, dateRange, weekData, keywords };
}
/**
* Build the week-ahead HTML body for the specified language.
*
* @param data - Week-ahead data payload
* @param lang - Target language code used for editorial strings
* @returns Article HTML body
*/
buildContent(data: WeekAheadArticleData, lang: LanguageCode): string {
const base = buildWeekAheadContent(data.weekData, data.dateRange, lang);
const watchSection = buildWhatToWatchSection(data.weekData.pipeline, [], lang);
// Inject at the explicit <!-- /article-content --> marker position so the
// section stays inside the .article-content styling scope. The marker is
// removed from the final HTML output to avoid unnecessary bytes.
if (watchSection) {
return base.replace('<!-- /article-content -->', watchSection);
}
return base.replace('<!-- /article-content -->', '');
}
/**
* Return language-specific metadata for the week-ahead article.
*
* @param data - Week-ahead data payload
* @param lang - Target language code
* @returns Localised metadata
*/
getMetadata(data: WeekAheadArticleData, lang: LanguageCode): ArticleMetadata {
const titleFn = getLocalizedString(WEEK_AHEAD_TITLES, lang);
const { title, subtitle } = titleFn(data.dateRange.start, data.dateRange.end);
return {
title,
subtitle,
keywords: data.keywords,
category: ArticleCategory.WEEK_AHEAD,
sources: [],
};
}
}
/** Singleton instance for use by the strategy registry */
export const weekAheadStrategy = new WeekAheadStrategy();
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