37 lines
1.5 KiB
TypeScript
37 lines
1.5 KiB
TypeScript
/** Live, off-chain Wikipedia data. Text fields are plain strings, never HTML. */
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export interface PageEnrichment {
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pageId: number;
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title: string;
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description: string | null;
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wikidataId: string | null;
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revisionId: number;
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pageBytes: number;
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/** Number of returned interlanguage links (a lower bound when truncated). */
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languageCount: number;
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languagesTruncated: boolean;
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categories: string[];
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categoriesTruncated: boolean;
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fetchedAt: string;
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pageviews: {
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status: 'available' | 'unavailable';
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/** Six completed UTC months, oldest first, identified as YYYY-MM. */
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months: { month: string; views: number }[];
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latestMonth: string;
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total: number | null;
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/** Latest completed month's views divided by its actual UTC day count. */
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dailyAverage: number | null;
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trendPercent: number | null;
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};
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stats: { attention: number | null; depth: number; reach: number };
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}
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/** Attention uses the latest completed month's views, not the six-month total. */
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export function deriveStats(pageBytes: number, languageCount: number, monthlyViews: number | null): PageEnrichment['stats'] {
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const score = (value: number, scale: number) => {
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if (!Number.isFinite(value) || value < 0) throw new RangeError('Invalid enrichment score input');
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return Math.min(100, Math.round(Math.log10(value + 1) / scale * 100));
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};
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return { attention: monthlyViews === null ? null : score(monthlyViews, 6),
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depth: score(pageBytes, 6), reach: score(languageCount, 3) };
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}
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