xiaoshu-app/projects/xiaoshu-mobile/src/app/core/external-reading.ts

export function extractReadingWords(value: unknown): string[] {
  let parsed = value;
  for (let depth = 0; depth < 2 && typeof parsed === 'string'; depth += 1) {
    try { parsed = JSON.parse(parsed) as unknown; }
    catch { return []; }
  }
  const entries = Array.isArray(parsed)
    ? parsed
    : parsed && typeof parsed === 'object' ? Object.values(parsed) : [];
  return entries
    .map((entry) => {
      if (typeof entry === 'string') return entry.trim();
      if (!entry || typeof entry !== 'object') return '';
      const item = entry as Record<string, unknown>;
      const detailValue = Array.isArray(item['detail']) ? item['detail'][0] : item['detail'];
      const detail = detailValue && typeof detailValue === 'object' ? detailValue as Record<string, unknown> : {};
      return String(item['Title'] ?? item['title'] ?? item['word'] ?? item['Word']
        ?? detail['Title'] ?? detail['title'] ?? detail['word'] ?? detail['Word'] ?? '').trim();
    })
    .filter(Boolean);
}