gpt51

`; const blob = new Blob([html], {type:'application/vnd.ms-excel'}); downloadBlob(blob, `ledger_vnd_${todayStr()}.xls`, 'application/vnd.ms-excel'); } function backupJSON(){ const payload = { settings, tx }; const json = '\uFEFF'+JSON.stringify(payload); downloadBlob(json, `ledger_vnd_backup_${todayStr()}.json`, 'application/json;charset=utf-8;'); } function restoreJSON(e){ const f = e.target.files[0]; if(!f) return; const reader = new FileReader(); reader.onload = function(){ try{ const obj = JSON.parse(reader.result); if(!obj || !Array.isArray(obj.tx) || !obj.settings) throw new Error('bad file'); // minimal validation settings = { ...defaultSettings(), ...obj.settings, budgets: { weekly: toInt(obj.settings?.budgets?.weekly||0), monthly: toInt(obj.settings?.budgets?.monthly||0) }, initBalances:{ cash: toInt(obj.settings?.initBalances?.cash||0), biz: toInt(obj.settings?.initBalances?.biz||0), personal: toInt(obj.settings?.initBalances?.personal||0), } }; tx = obj.tx.map(n=>({ id: n.id || uid(), type: n.type==='in'?'in':'out', account: ['cash','biz','personal'].includes(n.account)?n.account:'cash', amount: toInt(n.amount||0), date: n.date || fmtDateInput(new Date()), category: n.category||'', memo: n.memo||'', createdAt: n.createdAt || Date.now() })); saveSettings(); saveTx(); // Refill inputs els.langSelect.value = settings.lang; applyI18N(); applyTheme(settings.theme); setAmtInput(els.inpWeeklyPlan, settings.budgets.weekly); setAmtInput(els.inpMonthlyPlan, settings.budgets.monthly); setAmtInput(els.initCash, settings.initBalances.cash); setAmtInput(els.initBiz, settings.initBalances.biz); setAmtInput(els.initPersonal, settings.initBalances.personal); drawAll(); showToast(t('imported')); els.restoreFile.value = ''; }catch(err){ alert('Invalid backup file.'); } }; reader.readAsText(f); }// Helpers function escCsv(s){ return (s||'').replace(/[\r\n]+/g,' '); } function csvCell(s){ if(s==null) return ''; const str = String(s); if(/[",\n]/.test(str)) return `"${str.replace(/"/g,'""')}"`; return str; } function downloadBlob(content, filename, mime){ let blob = content instanceof Blob ? content : new Blob([content], {type:mime}); const url = URL.createObjectURL(blob); const a = document.createElement('a'); a.href = url; a.download = filename; document.body.appendChild(a); a.click(); setTimeout(()=>{ URL.revokeObjectURL(url); a.remove(); }, 100); } function todayStr(){ const d = new Date(); return `${d.getFullYear()}${String(d.getMonth()+1).padStart(2,'0')}${String(d.getDate()).padStart(2,'0')}`; } function uid(){ return 'id_'+Math.random().toString(36).slice(2,10)+Date.now().toString(36); } function escapeHtml(s){ return (s||'').replace(/[&<>"']/g, c=>({ '&':'&','<':'<','>':'>','"':'"',"'":'''}[c])); } function debounce(fn,ms){ let t; return (...a)=>{ clearTimeout(t); t=setTimeout(()=>fn(...a),ms); }; } function alertI18n(key){ alert(t(key)); }// -------------- Lightweight self-test (doesn't change user data) -------------- // Ensures integrity math and formatter work. Runs on isolated data. (function selfTest(){ try{ // pure compute with synthetic tx const init = {cash: 1000, biz: 0, personal: 0}; const tempTx = [ {type:'in', account:'cash', amount: 2000, date:'2025-01-10'}, {type:'out', account:'cash', amount: 500, date:'2025-01-11'}, {type:'in', account:'biz', amount: 300, date:'2025-01-12'}, ]; // compute let c = {...init}; for(const r of tempTx){ c[r.account] += (r.type==='in'?1:-1)*r.amount; } if(c.cash!==2500 || c.biz!==300 || c.personal!==0) throw new Error('balance mismatch'); // parse/format if(parseAmt('1,234,567 VND')!==1234567) throw new Error('parseAmt failed'); formatVND(123); // should not throw // ok }catch(e){ console.warn('Self-test failed', e); } })();})();