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// SPDX-License-Identifier: Apache-2.0
/**
* @module Generators/BreakingContent
* @description Pure functions for building breaking-news article HTML.
*
* **Feed-first approach**: EP feed data (adopted texts, events, procedures,
* MEP updates) is the primary news content. Analytical intelligence sections
* (voting anomalies, coalition dynamics) are supplementary context only.
* Precomputed statistics are NEVER the news itself.
*/
import { escapeHTML } from '../utils/file-utils.js';
import { getLocalizedString, EDITORIAL_STRINGS, BREAKING_STRINGS } from '../constants/languages.js';
import type { BreakingStrings } from '../types/index.js';
import type {
VotingAnomalyIntelligence,
CoalitionIntelligence,
MEPInfluenceScore,
BreakingNewsFeedData,
AdoptedTextFeedItem,
EventFeedItem,
ProcedureFeedItem,
MEPFeedItem,
} from '../types/index.js';
/** Maximum characters to display from raw MCP intelligence data */
const MAX_DATA_CHARS = 2000;
/**
* Return true when `raw` is a JSON error object (contains an `"error"` key),
* indicating that the MCP tool call failed rather than returning useful data.
*
* @param raw - Raw string from MCP tool call
* @returns `true` when raw is a tool-error JSON payload
*/
function isToolError(raw: string): boolean {
try {
const parsed: unknown = JSON.parse(raw.trim());
return (
typeof parsed === 'object' &&
parsed !== null &&
'error' in (parsed as Record<string, unknown>)
);
} catch {
return false;
}
}
/** Maximum feed items to render per section */
const MAX_FEED_ITEMS = 10;
/**
* Build a feed truncation note paragraph when displayed items are fewer than total items.
*
* @param shown - Number of items shown
* @param total - Total number of items available
* @param strings - Localized breaking strings containing `showingXofNFn`
* @returns HTML paragraph string or empty string
*/
function buildFeedTruncationNote(shown: number, total: number, strings: BreakingStrings): string {
if (shown >= total) return '';
return `\n <p class="feed-truncation-note">${escapeHTML(strings.showingXofNFn(shown, total))}</p>`;
}
/**
* Regex that matches generic placeholder adopted-text titles generated by the EP feed API.
* When matched, the label/identifier is preferred as the display title instead.
*/
const ADOPTED_TEXT_PLACEHOLDER_PATTERN = /^(Adopted text|European Parliament adopted text)/i;
// ─── Feed section builders ───────────────────────────────────────────────────
/**
* Build adopted texts section HTML from feed items.
*
* @param items - Adopted text feed items
* @param lang - Language code for localized strings
* @returns HTML section string or empty string
*/
function buildAdoptedTextsSection(items: readonly AdoptedTextFeedItem[], lang: string): string {
if (items.length === 0) return '';
const strings = getLocalizedString(BREAKING_STRINGS, lang);
const displayItems = items.slice(0, MAX_FEED_ITEMS);
// EP API provides titles in English only — mark non-English articles accordingly
const titleLangAttr = lang !== 'en' ? ' lang="en"' : '';
const listItems = displayItems
.map((item) => {
const labelOrId = item.label ?? item.identifier;
const titleIsPlaceholder = !item.title || ADOPTED_TEXT_PLACEHOLDER_PATTERN.test(item.title);
const displayTitle =
(titleIsPlaceholder
? labelOrId
? strings.adoptedTextItemLabelFn(labelOrId)
: item.title
: item.title) ?? '';
const showSecondaryLabel = !titleIsPlaceholder && labelOrId;
return (
`<li class="feed-item adopted-text-item">` +
`<strong${titleLangAttr}>${escapeHTML(displayTitle)}</strong>` +
`${showSecondaryLabel && labelOrId ? ` <span class="feed-label">${escapeHTML(labelOrId)}</span>` : ''}` +
`${item.date ? ` <span class="feed-date">(${escapeHTML(item.date)})</span>` : ''}` +
`${item.type ? ` <span class="feed-type">${escapeHTML(strings.adoptedTextTypeLabel)}</span>` : ''}` +
`</li>`
);
})
.join('\n ');
const truncationNote = buildFeedTruncationNote(displayItems.length, items.length, strings);
return `
<section class="adopted-texts-feed">
<h2>${escapeHTML(strings.adoptedTextsHeading)}</h2>
<ul>
${listItems}
</ul>${truncationNote}
</section>`;
}
/**
* Build recent events section HTML from feed items.
*
* @param items - Event feed items
* @param lang - Language code for localized strings
* @returns HTML section string or empty string
*/
function buildRecentEventsSection(items: readonly EventFeedItem[], lang: string): string {
if (items.length === 0) return '';
const strings = getLocalizedString(BREAKING_STRINGS, lang);
const listItems = items
.slice(0, MAX_FEED_ITEMS)
.map(
(item) =>
`<li class="feed-item event-item">` +
`<strong>${escapeHTML(item.title)}</strong>` +
`${item.date ? ` <span class="feed-date">(${escapeHTML(item.date)})</span>` : ''}` +
`${item.location ? ` <span class="feed-location">${escapeHTML(item.location)}</span>` : ''}` +
`</li>`
)
.join('\n ');
return `
<section class="events-feed">
<h2>${escapeHTML(strings.recentEventsHeading)}</h2>
<ul>
${listItems}
</ul>
</section>`;
}
/**
* Build procedure updates section HTML from feed items.
*
* @param items - Procedure feed items
* @param lang - Language code for localized strings
* @returns HTML section string or empty string
*/
function buildProcedureUpdatesSection(items: readonly ProcedureFeedItem[], lang: string): string {
if (items.length === 0) return '';
const strings = getLocalizedString(BREAKING_STRINGS, lang);
const listItems = items
.slice(0, MAX_FEED_ITEMS)
.map(
(item) =>
`<li class="feed-item procedure-item">` +
`<strong>${escapeHTML(item.title)}</strong>` +
`${item.stage ? ` <span class="feed-stage">[${escapeHTML(item.stage)}]</span>` : ''}` +
`${item.date ? ` <span class="feed-date">(${escapeHTML(item.date)})</span>` : ''}` +
`</li>`
)
.join('\n ');
return `
<section class="procedures-feed">
<h2>${escapeHTML(strings.procedureUpdatesHeading)}</h2>
<ul>
${listItems}
</ul>
</section>`;
}
/**
* Build MEP updates section HTML from feed items.
*
* @param items - MEP feed items (up to the fetch limit)
* @param lang - Language code for localized strings
* @param totalCount - Optional total MEP updates reported by the feed API (may exceed fetched items)
* @returns HTML section string or empty string
*/
function buildMEPUpdatesSection(
items: readonly MEPFeedItem[],
lang: string,
totalCount?: number
): string {
if (items.length === 0) return '';
const strings = getLocalizedString(BREAKING_STRINGS, lang);
const displayItems = items.slice(0, MAX_FEED_ITEMS);
const listItems = displayItems
.map(
(item) =>
`<li class="feed-item mep-item">` +
`<strong>${escapeHTML(item.name)}</strong>` +
`${item.date ? ` <span class="feed-date">(${escapeHTML(item.date)})</span>` : ''}` +
`${item.country ? ` <span class="feed-country">(${escapeHTML(item.country)})</span>` : ''}` +
`${item.group ? ` <span class="feed-group">${escapeHTML(item.group)}</span>` : ''}` +
`</li>`
)
.join('\n ');
// Use API total count when available and larger than fetched count; otherwise fall back to fetched count
const reportedTotal =
totalCount !== undefined && totalCount > items.length ? totalCount : items.length;
const truncationNote = buildFeedTruncationNote(displayItems.length, reportedTotal, strings);
return `
<section class="mep-updates-feed">
<h2>${escapeHTML(strings.mepUpdatesHeading)}</h2>
<ul>
${listItems}
</ul>${truncationNote}
</section>`;
}
/**
* Build the combined feed-based news sections (primary content).
*
* @param feedData - Aggregated feed data
* @param lang - Language code
* @returns HTML string with all feed sections
*/
function buildFeedSections(feedData: BreakingNewsFeedData | undefined, lang: string): string {
if (!feedData) return '';
const sections = [
buildAdoptedTextsSection(feedData.adoptedTexts, lang),
buildRecentEventsSection(feedData.events, lang),
buildProcedureUpdatesSection(feedData.procedures, lang),
buildMEPUpdatesSection(feedData.mepUpdates, lang, feedData.totalMEPUpdates),
];
return sections.filter(Boolean).join('');
}
// ─── Private intelligence section builders ───────────────────────────────────
/**
* Build intelligence briefing section HTML from structured anomaly data
*
* @param anomalies - Structured voting anomaly intelligence items
* @param lang - Language code for localized strings
* @returns HTML section string or empty string
*/
function buildAnomalyAlertSection(anomalies: VotingAnomalyIntelligence[], lang: string): string {
if (anomalies.length === 0) return '';
const strings = getLocalizedString(BREAKING_STRINGS, lang);
const items = anomalies
.map(
(a) =>
`<li class="anomaly-${escapeHTML(a.significance)}">` +
`<strong>${escapeHTML(a.description)}</strong> — ` +
`${escapeHTML(a.implication)} ` +
`(deviation: ${escapeHTML(String(a.deviationPercentage))}%)</li>`
)
.join('\n ');
return `
<section class="anomaly-alert">
<h3>${escapeHTML(strings.votingAnomalyAlert)}</h3>
<ul>
${items}
</ul>
</section>`;
}
/**
* Build coalition dynamics section HTML from structured coalition data
*
* @param coalitions - Structured coalition intelligence items
* @param lang - Language code for localized strings
* @returns HTML section string or empty string
*/
function buildCoalitionDynamicsSection(coalitions: CoalitionIntelligence[], lang: string): string {
if (coalitions.length === 0) return '';
const strings = getLocalizedString(BREAKING_STRINGS, lang);
const items = coalitions
.map(
(c) =>
`<li class="coalition-${escapeHTML(c.riskLevel)}">` +
`${escapeHTML(c.groups.join(', '))} — ` +
`cohesion: ${escapeHTML(String(Math.round(c.cohesionScore * 100)))}% ` +
`(${escapeHTML(c.alignmentTrend)})</li>`
)
.join('\n ');
return `
<section class="coalition-dynamics">
<h3>${escapeHTML(strings.coalitionDynamicsSection)}</h3>
<ul>
${items}
</ul>
</section>`;
}
/**
* Build key parliamentary players section HTML from structured MEP influence data
*
* @param mepScores - Structured MEP influence score items
* @param lang - Language code for localized strings
* @returns HTML section string or empty string
*/
function buildKeyPlayersIntelSection(mepScores: MEPInfluenceScore[], lang: string): string {
if (mepScores.length === 0) return '';
const strings = getLocalizedString(BREAKING_STRINGS, lang);
const items = mepScores
.map(
(m) =>
`<li class="mep-score">` +
`<strong>${escapeHTML(m.mepName)}</strong> — ` +
`score: ${escapeHTML(String(Math.round(m.overallScore)))} ` +
`${m.rank ? `(${escapeHTML(m.rank)})` : ''}</li>`
)
.join('\n ');
return `
<section class="key-players-intel">
<h3>${escapeHTML(strings.keyPlayers)}</h3>
<ul>
${items}
</ul>
</section>`;
}
/**
* Build intelligence briefing section HTML from all structured sources
*
* @param anomalies - Structured voting anomaly intelligence items
* @param coalitions - Structured coalition intelligence items
* @param mepScores - Structured MEP influence score items
* @param lang - Language code for localized strings
* @returns HTML section string or empty string
*/
function buildIntelligenceBriefingSection(
anomalies: VotingAnomalyIntelligence[],
coalitions: CoalitionIntelligence[],
mepScores: MEPInfluenceScore[],
lang: string
): string {
const hasIntel = anomalies.length > 0 || coalitions.length > 0 || mepScores.length > 0;
if (!hasIntel) return '';
const strings = getLocalizedString(BREAKING_STRINGS, lang);
return `
<section class="intelligence-briefing">
<h2>${escapeHTML(strings.intelligenceBriefing)}</h2>
${buildAnomalyAlertSection(anomalies, lang)}
${buildCoalitionDynamicsSection(coalitions, lang)}
${buildKeyPlayersIntelSection(mepScores, lang)}
</section>`;
}
/**
* Build voting anomaly section HTML, showing a localized fallback when the raw
* data is a tool-error payload rather than useful intelligence.
*
* @param raw - Raw anomaly data string from MCP (may be empty or an error JSON)
* @param strings - Localized breaking-news strings for the target language
* @param sourceAttribution - Localized source attribution label
* @returns HTML section string or empty string
*/
function buildAnomalyRawSection(
raw: string,
strings: BreakingStrings,
sourceAttribution: string
): string {
if (!raw) return '';
const heading = `<h2>${escapeHTML(strings.votingAnomalyIntel)}</h2>`;
Iif (isToolError(raw)) {
return `
<section class="analysis">
${heading}
<p class="data-narrative">${escapeHTML(strings.anomalyUnavailable)}</p>
</section>`;
}
return `
<section class="analysis">
${heading}
<p class="source-attribution">${escapeHTML(sourceAttribution)}:</p>
<p class="data-narrative">${escapeHTML(raw.slice(0, MAX_DATA_CHARS))}</p>
</section>`;
}
/**
* Build coalition dynamics section HTML, showing a localized fallback when the
* raw data is a tool-error payload rather than useful intelligence.
*
* @param raw - Raw coalition data string from MCP (may be empty or an error JSON)
* @param strings - Localized breaking-news strings for the target language
* @param sourceAttribution - Localized source attribution label
* @returns HTML section string or empty string
*/
function buildCoalitionRawSection(
raw: string,
strings: BreakingStrings,
sourceAttribution: string
): string {
if (!raw) return '';
const heading = `<h2>${escapeHTML(strings.coalitionDynamics)}</h2>`;
Iif (isToolError(raw)) {
return `
<section class="coalition-impact">
${heading}
<p class="data-narrative">${escapeHTML(strings.coalitionUnavailable)}</p>
</section>`;
}
return `
<section class="coalition-impact">
${heading}
<p class="source-attribution">${escapeHTML(sourceAttribution)}:</p>
<p class="data-narrative">${escapeHTML(raw.slice(0, MAX_DATA_CHARS))}</p>
</section>`;
}
// ─── Exported function ────────────────────────────────────────────────────────
/**
* Build breaking news article HTML content.
*
* **Feed-first**: When `feedData` is provided, feed sections are the primary
* content and appear first. Raw MCP analytical data and structured intelligence
* sections are rendered as supplementary context below.
*
* When no data is provided at all, returns a placeholder notice.
*
* @param date - Current date string for the article
* @param anomalyRaw - Raw anomaly data from MCP (context only)
* @param coalitionRaw - Raw coalition dynamics data from MCP (context only)
* @param reportRaw - Raw analytical report from MCP (context only)
* @param influenceRaw - Raw MEP influence data from MCP (context only)
* @param lang - Language code for localized editorial strings (default: 'en')
* @param anomalies - Optional structured voting anomaly intelligence items
* @param coalitions - Optional structured coalition intelligence items
* @param mepScores - Optional structured MEP influence score items
* @param feedData - Optional EP feed data (adopted texts, events, procedures, MEPs)
* @returns Full article HTML content string
*/
export function buildBreakingNewsContent(
date: string,
anomalyRaw: string,
coalitionRaw: string,
reportRaw: string,
influenceRaw: string,
lang = 'en',
anomalies: VotingAnomalyIntelligence[] = [],
coalitions: CoalitionIntelligence[] = [],
mepScores: MEPInfluenceScore[] = [],
feedData?: BreakingNewsFeedData
): string {
const editorial = getLocalizedString(EDITORIAL_STRINGS, lang);
const strings = getLocalizedString(BREAKING_STRINGS, lang);
// Feed data is the primary news content
const hasFeedData = Boolean(
feedData &&
(feedData.adoptedTexts.length > 0 ||
feedData.events.length > 0 ||
feedData.procedures.length > 0 ||
feedData.mepUpdates.length > 0)
);
// Analytical data is context only
const hasAnalyticalData = Boolean(
anomalyRaw ||
coalitionRaw ||
reportRaw ||
influenceRaw ||
anomalies.length ||
coalitions.length ||
mepScores.length
);
const hasData = hasFeedData || hasAnalyticalData;
// MCP is truly unavailable only when feedData is undefined AND no analytical data
const isMCPUnavailable = !feedData && !hasAnalyticalData;
const timestamp = new Date().toISOString();
// ─── Feed sections (PRIMARY news content) ──────────────────────────────
// When feedData is present but empty AND hasAnalyticalData is false,
// the lede already conveys noFeedDataNotice — skip the duplicate section.
const feedSections =
feedData && !hasFeedData && hasAnalyticalData
? `
<section class="feed-empty-notice">
<p>${escapeHTML(strings.noFeedDataNotice)}</p>
</section>`
: buildFeedSections(feedData, lang);
// ─── Analytical context sections (SECONDARY) ──────────────────────────
const anomalySection = buildAnomalyRawSection(anomalyRaw, strings, editorial.sourceAttribution);
const coalitionSection = buildCoalitionRawSection(
coalitionRaw,
strings,
editorial.sourceAttribution
);
const reportSection = reportRaw
? `
<section class="context">
<h2>${escapeHTML(strings.analyticalReport)}</h2>
<p class="source-attribution">${escapeHTML(editorial.analysisNote)}:</p>
<p class="data-narrative">${escapeHTML(reportRaw.slice(0, MAX_DATA_CHARS))}</p>
</section>`
: '';
const keyPlayersSection = influenceRaw
? `
<section class="key-players">
<h2>${escapeHTML(strings.keyMEPInfluence)}</h2>
<p class="source-attribution">${escapeHTML(editorial.sourceAttribution)}:</p>
<p class="data-narrative">${escapeHTML(influenceRaw.slice(0, MAX_DATA_CHARS))}</p>
</section>`
: '';
const context = escapeHTML(editorial.parliamentaryContext);
const finding = escapeHTML(editorial.keyTakeaway);
const attribution = escapeHTML(editorial.sourceAttribution);
const whyThisMattersSection = hasData
? `
<section class="why-this-matters">
<h2>${escapeHTML(editorial.whyThisMatters)}</h2>
<p>${context}: ${finding} — ${attribution}.</p>
</section>`
: '';
const intelligenceBriefing = buildIntelligenceBriefingSection(
anomalies,
coalitions,
mepScores,
lang
);
const ledeText = hasAnalyticalData
? strings.lede
: hasFeedData
? strings.feedLede
: strings.noFeedDataNotice;
const placeholderNotice = isMCPUnavailable
? `
<div class="notice">
<p><strong>Note:</strong> ${escapeHTML(strings.placeholderNotice)}</p>
</div>
<section class="lede">
<p>${escapeHTML(strings.placeholderLede)}</p>
</section>`
: `
<section class="lede">
<p>${escapeHTML(ledeText.replace(/[.。]$/, '').trimEnd())} ${escapeHTML(strings.asOf)} ${escapeHTML(date)}.</p>
</section>`;
return `
<div class="article-content">
<section class="breaking-banner">
<p class="breaking-timestamp">${escapeHTML(strings.breakingBanner)} — ${escapeHTML(timestamp)}</p>
</section>
${placeholderNotice}
${feedSections}
${intelligenceBriefing}
${anomalySection}
${coalitionSection}
${reportSection}
${keyPlayersSection}
${whyThisMattersSection}
</div>
`;
}
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