/* daily.jsx — Today's Drill: 3 questions a day, spaced review. Selection is seeded by the date (same 3 questions all day): · prefer chapters the learner has completed (hte-progress) · strongly prefer questions previously missed (hte-daily.history) · otherwise rotate through least-recently-seen State in localStorage 'hte-daily': { lastDone: 'YYYY-MM-DD', streak, history: { [qid]: { seen, missed } } } */ const { useState: dlUseState, useEffect: dlUseEffect, useMemo: dlUseMemo } = React; const DL_TWEAK_DEFAULTS = /*EDITMODE-BEGIN*/{ "theme": "paper", "audience": "adult" }/*EDITMODE-END*/; const dlToday = () => new Date().toISOString().slice(0, 10); function dlLoad() { try { return JSON.parse(localStorage.getItem("hte-daily") || "{}"); } catch (e) { return {}; } } function dlSave(d) { try { localStorage.setItem("hte-daily", JSON.stringify(d)); } catch (e) {} } // Deterministic RNG from a string seed (mulberry32 over a simple hash) function dlSeeded(seed) { let h = 1779033703 ^ seed.length; for (let i = 0; i < seed.length; i++) { h = Math.imul(h ^ seed.charCodeAt(i), 3432918353); h = (h << 13) | (h >>> 19); } return function () { h = Math.imul(h ^ (h >>> 16), 2246822507); h = Math.imul(h ^ (h >>> 13), 3266489909); h ^= h >>> 16; return (h >>> 0) / 4294967296; }; } /* Pick today's 3 questions. */ function dlPick(date) { const rnd = dlSeeded("hte-" + date); let progress = {}; try { progress = JSON.parse(localStorage.getItem("hte-progress") || "{}"); } catch (e) {} const hist = (dlLoad().history) || {}; const doneCh = new Set(Object.keys(progress).filter(k => progress[k] === "done")); const anyDone = doneCh.size > 0; const scored = DAILY_BANK.map(q => { const h = hist[q.id] || { seen: 0, missed: 0 }; let w = 1; if (anyDone && doneCh.has(q.ch)) w += 2; // review what you've learned w += Math.min(3, h.missed * 2); // re-ask what you've missed w += h.seen === 0 ? 1 : 0; // mild novelty bonus w /= (1 + h.seen * 0.35); // fade things seen often return { q, w, r: rnd() }; }); // weighted sample without replacement, deterministic via r scored.sort((a, b) => (Math.pow(a.r, 1 / a.w)) < (Math.pow(b.r, 1 / b.w)) ? 1 : -1); // diversify: avoid 2 questions from the same chapter when possible const picked = []; for (const s of scored) { if (picked.length >= 3) break; if (picked.some(p => p.ch === s.q.ch) && scored.length - picked.length > 3) continue; picked.push(s.q); } while (picked.length < 3) { const s = scored.find(x => !picked.includes(x.q)); if (!s) break; picked.push(s.q); } return picked; } function DlApp() { const [t, setTweak] = useTweaks(DL_TWEAK_DEFAULTS); useCrossChapterPersistence(t, setTweak); dlUseEffect(() => { document.body.setAttribute("data-theme", t.theme); }, [t.theme]); const kids = t.audience === "kids"; const today = dlToday(); const questions = dlUseMemo(() => dlPick(today), [today]); const store = dlLoad(); const alreadyDone = store.lastDone === today; // per-question presentation shuffle (stable per day) const shuffled = dlUseMemo(() => { const rnd = dlSeeded("hte-shuffle-" + today); return questions.map(q => { const order = q.options.map((_, i) => i).sort(() => rnd() - 0.5); return { ...q, order, correctAt: order.indexOf(q.correct) }; }); }, [questions, today]); const [answers, setAnswers] = dlUseState({}); const answeredAll = Object.keys(answers).length === shuffled.length; const score = shuffled.reduce((acc, q, i) => acc + (answers[i] === q.correctAt ? 1 : 0), 0); // commit on completion: streak + history dlUseEffect(() => { if (!answeredAll || alreadyDone) return; const d = dlLoad(); const hist = d.history || {}; shuffled.forEach((q, i) => { const h = hist[q.id] || { seen: 0, missed: 0 }; h.seen += 1; if (answers[i] !== q.correctAt) h.missed += 1; else h.missed = Math.max(0, h.missed - 1); hist[q.id] = h; }); const yesterday = new Date(Date.now() - 86400000).toISOString().slice(0, 10); const streak = d.lastDone === yesterday ? (d.streak || 0) + 1 : 1; dlSave({ ...d, lastDone: today, streak, history: hist }); }, [answeredAll]); const streak = (dlLoad().streak) || 0; return ( <> setTweak("audience", a)} />
today's drill · {today}{streak > 1 ? ` · ${streak}-day streak` : ""}

{alreadyDone && !answeredAll ? <>Done for today. Come back tomorrow. : <>Three questions.
Three minutes.}

{kids ? <>A tiny daily brain-wake-up! It remembers what tripped you up and sneaks those back in. : <>Spaced review across everything you've covered — weighted toward chapters you've finished and questions you've missed before. Same three for everyone today; fresh three tomorrow.}

{alreadyDone && !answeredAll && (

{kids ? <>You already did today's three — nice! Your streak is safe. Want more right now? The chapter quizzes always have fresh draws. : <>Today's set is logged{streak > 1 ? <> — streak at {streak} days : ""}. The bank refreshes at midnight. For more reps now, any chapter quiz can deal "5 fresh questions."}

)} {(!alreadyDone || answeredAll) && (
{shuffled.map((q, qi) => { const picked = answers[qi]; const isDone = picked !== undefined; const chMeta = ALL_CHAPTERS.find(c => c.n === q.ch); return (
{qi + 1} / 3 · from ch. {q.ch}{chMeta ? ` — ${chMeta.t}` : ""}

{kids ? q.q.kids : q.q.adult}

{q.order.map((origIdx, oi) => { let cls = ""; if (isDone) { if (oi === q.correctAt) cls = "correct"; else if (oi === picked) cls = "wrong"; } return ( ); })}
{isDone && (
{kids ? q.explain.kids : q.explain.adult}
)}
); })} {answeredAll && (

{score}/3 {score === 3 ? (kids ? "— perfect! See you tomorrow." : "— clean sweep. Logged; see you tomorrow.") : (kids ? "— the tricky ones will sneak back soon!" : "— misses noted; they'll come back around.")} {" "}{streak >= 1 && `Streak: ${dlLoad().streak} day${dlLoad().streak === 1 ? "" : "s"}.`}

)}
)}
); } ReactDOM.createRoot(document.getElementById("root")).render();