TypeScript로 파이프라인 패턴 구현

// pipe<A, B, C>(fn1: (a:A)=>B, fn2: (b:B)=>C): (a:A)=>C
  const pipe = (...fns) => (value) => fns.reduce((acc, fn) => fn(acc), value);

  // 각 변환 함수 (타입 안전)
  const normalize = (unit) => ({ ...unit, model: unit.model.toUpperCase() });
  const addThreatLevel = (unit) => ({ ...unit, level: unit.threat >= 9 ? 'CRITICAL' : unit.threat >= 7 ? 'HIGH' : 'MEDIUM' });
  const addTimestamp = (unit) => ({ ...unit, processed: new Date().toISOString() });
  const format = (unit) => `[${unit.level}] ${unit.model} 위협도:${unit.threat}`;

  const processUnit = pipe(normalize, addThreatLevel, addTimestamp, format);

  const units = [
    { model: 't-800', threat: 8 },
    { model: 't-1000', threat: 10 },
    { model: 't-x', threat: 9 },
    { model: 't-600', threat: 6 },
  ];

  units.forEach(u => {
    const result = processUnit(u);
    const el = document.createElement('div');
    el.style.color = result.includes('CRITICAL') ? '#10b981' : result.includes('HIGH') ? '#f59e0b' : '#22c55e';
    el.style.fontSize = '11px'; el.style.marginBottom = '4px';
    el.textContent = result;
    document.currentScript.parentElement.appendChild(el);
  });