Function extractMangaMetadata

Source

export function extractMangaMetadata(manga: KenmeiManga[]): {
  totalManga: number;
  statusCounts: Record<KenmeiStatus, number>;
  hasVolumes: boolean;
  averageScore: number;
  totalChaptersRead: number;
} {
  const statusCounts: Record<KenmeiStatus, number> = {
    reading: 0,
    completed: 0,
    on_hold: 0,
    dropped: 0,
    plan_to_read: 0,
  };

  let totalScore = 0;
  let scoredEntries = 0;
  let totalChaptersRead = 0;
  let hasVolumesData = false;

  for (const entry of manga) {
    // Count statuses
    statusCounts[entry.status] = (statusCounts[entry.status] ?? 0) + 1;

    if (entry.score > 0) {
      totalScore += entry.score;
      scoredEntries++;
    }

    totalChaptersRead += entry.chapters_read ?? 0;

    if (entry.volumes_read !== undefined || entry.total_volumes !== undefined)
      hasVolumesData = true;
  }

  return {
    totalManga: manga.length,
    statusCounts,
    hasVolumes: hasVolumesData,
    averageScore: scoredEntries > 0 ? totalScore / scoredEntries : 0,
    totalChaptersRead,
  };
}
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