[{"_1":2,"_3":-5,"_4":-5},"loaderData",{"_5":6,"_7":8,"_9":10},"actionData","errors","root",{"_155":156,"_157":158},"routes/_app.x.$handle.$name",{"_96":95,"_32":45,"_105":86,"_27":53,"_13":14,"_106":-5,"_11":107,"_108":109,"_110":111,"_112":113,"_114":115,"_20":-5,"_116":-5,"_117":-5,"_118":25,"_119":120,"_121":58,"_122":-5,"_123":-5,"_124":125},"routes/_app.x.$handle.$name.branch.$branch.version.$version.diff",{"_11":12,"_13":14,"_15":16,"_17":-5,"_18":-5},"project",{"_43":44,"_32":45,"_38":46,"_47":-5,"_48":25,"_49":50,"_51":50,"_52":53,"_54":-5,"_18":55,"_56":31,"_57":58,"_59":-5,"_60":-5,"_61":62,"_63":64,"_65":-5,"_66":-5,"_67":-5,"_68":-5,"_69":70,"_71":70,"_72":73,"_74":73,"_75":73,"_76":70,"_77":70,"_78":79,"_80":81,"_82":83,"_84":25},"version",3,"changes",[19],"aiChatInfo","userId",{"_20":21,"_22":23,"_24":25,"_26":25,"_27":28,"_29":28},"file",{"_30":31,"_32":28,"_33":37,"_35":36,"_38":39,"_40":14,"_41":42,"_24":25},"previous",{"_30":31,"_32":28,"_33":34,"_35":36},"deleted",false,"deletedHere","path","main.ts","latestPath","fileId","c9b8803e-82d5-11f1-a8d4-1607ee4eb77e","name","fileType","script","content","/**\n * Music Lesson Booking — Availability & Auto-Scheduling\n * Instructor: Ivy Lu · September–December 2026\n * ------------------------------------------------------\n * A single-file Val.town HTTP val.\n *\n * • Parents mark EVERY time their child can take lessons, per day\n * (off / all day / a time window). Lessons are 1 hour, on the hour.\n * • Submissions are stored in blob storage and emailed to you.\n * • /admin — every submission, live, with CSV export.\n * • /schedule — an auto-generated timetable draft: each student is\n * placed into an open hour inside their availability,\n * most-constrained students first, weekdays before\n * Saturday. Anyone who can't be placed is listed for\n * manual handling.\n *\n * DEPLOY\n * 1. val.town → New → HTTP val. Paste this whole file.\n * 2. Edit CONFIG (admin password, hours). Save.\n * 3. Share the val URL with parents. Admin: URL + /admin\n *\n * std/email sends to your Val.town account email — no SMTP setup.\n */\n\nimport { blob } from \"https://esm.town/v/std/blob\";\nimport { email } from \"https://esm.town/v/std/email\";\n\n/* ============================ CONFIG ============================ */\n\nconst CONFIG = {\n brandName: \"Music Lesson Booking\",\n instructor: \"Ivy Lu\",\n term: \"September–December 2026\",\n\n // Password for /admin and /schedule. CHANGE THIS.\n adminPassword: \"ivylu1220\",\n\n // Teaching days. Hours are whole numbers, 24h. `start` = first lesson\n // start hour; `end` = the hour by which a lesson must FINISH.\n // Tuesday and Sunday are intentionally absent (not taught).\n // Weekdays begin at 16 (4 PM). Saturday 9–18 (9 AM–6 PM).\n availability: {\n Monday: { start: 16, end: 21 },\n Wednesday: { start: 16, end: 21 },\n Thursday: { start: 16, end: 21 },\n Friday: { start: 16, end: 21 },\n Saturday: { start: 9, end: 18 },\n } as Record,\n\n // Order the solver fills days. Weekdays first, then Saturday.\n dayPriority: [\"Monday\", \"Wednesday\", \"Thursday\", \"Friday\", \"Saturday\"],\n};\n\nconst WEEKDAYS = new Set([\"Monday\", \"Wednesday\", \"Thursday\", \"Friday\"]);\nconst BLOB_KEY = \"lesson_booking_availability_v1\";\n\n/* ======================= TYPES & STORAGE ======================= */\n\ntype Window = { day: string; start: number; end: number };\n// mode \"all\" stores the day's full range; \"window\" stores the chosen range.\n\ntype Submission = {\n id: string;\n submittedAt: string;\n studentName: string;\n parentName: string;\n contact: string;\n format: string; // In-person | Online | Either\n windows: Window[]; // every available window across days\n notes: string;\n};\n\nasync function loadAll(): Promise {\n try {\n const d = await blob.getJSON(BLOB_KEY);\n return Array.isArray(d) ? d : [];\n } catch {\n return [];\n }\n}\nasync function saveAll(list: Submission[]): Promise {\n await blob.setJSON(BLOB_KEY, list);\n}\n\n/* =========================== HELPERS =========================== */\n\nfunction to12h(hour: number): string {\n const ap = hour >= 12 ? \"PM\" : \"AM\";\n const h = hour % 12 === 0 ? 12 : hour % 12;\n return `${h}:00 ${ap}`;\n}\nfunction json(obj: unknown, status = 200): Response {\n return new Response(JSON.stringify(obj), {\n status,\n headers: { \"Content-Type\": \"application/json\" },\n });\n}\nfunction esc(s: string): string {\n return String(s).replace(\n /[&<>\"']/g,\n (\n c,\n ) => ({\n \"&\": \"&\",\n \"<\": \"<\",\n \">\": \">\",\n '\"': \""\",\n \"'\": \"'\",\n }[c]!),\n );\n}\nfunction fmtWindow(w: Window): string {\n const a = CONFIG.availability[w.day];\n if (a && w.start === a.start && w.end === a.end) return `${w.day} · all day`;\n return `${w.day} ${to12h(w.start)}–${to12h(w.end)}`;\n}\n\n/* ====================== AUTO-SCHEDULE SOLVER ====================== */\n\ntype Slot = { day: string; hour: number };\n\n// Expand a student's windows into concrete 1-hour start slots that are\n// legal for the studio (day taught, lesson finishes by close).\nfunction slotsFor(windows: Window[]): Slot[] {\n const out: Slot[] = [];\n const seen = new Set();\n for (const w of windows) {\n const a = CONFIG.availability[w.day];\n if (!a) continue; // day not taught (e.g. Tuesday/Sunday) — skip\n const from = Math.max(w.start, a.start);\n const to = Math.min(w.end, a.end);\n for (let h = from; h + 1 <= to; h++) {\n const key = `${w.day}-${h}`;\n if (!seen.has(key)) {\n seen.add(key);\n out.push({ day: w.day, hour: h });\n }\n }\n }\n return out;\n}\n\nfunction orderSlots(slots: Slot[]): Slot[] {\n return [...slots].sort((x, y) => {\n const xw = WEEKDAYS.has(x.day) ? 0 : 1;\n const yw = WEEKDAYS.has(y.day) ? 0 : 1;\n if (xw !== yw) return xw - yw; // weekdays first\n const dp = CONFIG.dayPriority.indexOf(x.day) -\n CONFIG.dayPriority.indexOf(y.day);\n if (dp !== 0) return dp; // then day order\n return x.hour - y.hour; // then earliest hour\n });\n}\n\ntype SolveRow = {\n sub: Submission;\n slotCount: number;\n assigned: Slot | null;\n};\ntype SolveResult = { rows: SolveRow[]; manual: SolveRow[]; placed: number };\n\n/**\n * Most-constrained-first greedy assignment.\n * Students with the fewest legal hours are placed first so a child with\n * only one possible time isn't crowded out by a flexible child who\n * happened to submit earlier. Ties break by submission time (fair,\n * explainable). Each hour on each day holds one student.\n */\nfunction solve(all: Submission[]): SolveResult {\n const items = all.map((sub) => ({\n sub,\n slots: orderSlots(slotsFor(sub.windows)),\n t: new Date(sub.submittedAt).getTime(),\n }));\n\n const placeOrder = [...items].sort((a, b) => {\n if (a.slots.length !== b.slots.length) {\n return a.slots.length - b.slots.length;\n }\n return a.t - b.t;\n });\n\n const taken = new Set();\n const assignMap = new Map();\n for (const it of placeOrder) {\n let got: Slot | null = null;\n for (const s of it.slots) {\n const key = `${s.day}-${s.hour}`;\n if (!taken.has(key)) {\n taken.add(key);\n got = s;\n break;\n }\n }\n assignMap.set(it.sub.id, got);\n }\n\n // Present in submission order.\n const rows: SolveRow[] = items\n .sort((a, b) => a.t - b.t)\n .map((it) => ({\n sub: it.sub,\n slotCount: it.slots.length,\n assigned: assignMap.get(it.sub.id) ?? null,\n }));\n\n const manual = rows.filter((r) => !r.assigned);\n return { rows, manual, placed: rows.length - manual.length };\n}\n\n/* ============================ ROUTER ============================ */\n\nexport default async function (req: Request): Promise {\n const url = new URL(req.url);\n if (req.method === \"POST\" && url.pathname === \"/submit\") {\n return handleSubmit(req);\n }\n if (url.pathname === \"/admin\") return handleAdmin(url);\n if (url.pathname === \"/admin.csv\") return handleCsv(url);\n if (url.pathname === \"/schedule\") return handleSchedule(url);\n return new Response(renderForm(), {\n headers: { \"Content-Type\": \"text/html; charset=utf-8\" },\n });\n}\n\n/* ========================= SUBMIT ========================= */\n\nasync function handleSubmit(req: Request): Promise {\n let body: any;\n try {\n body = await req.json();\n } catch {\n return json({ ok: false, error: \"Invalid data\" }, 400);\n }\n\n const s = (v: unknown) => (v ?? \"\").toString().trim();\n const studentName = s(body.studentName);\n const parentName = s(body.parentName);\n const contact = s(body.contact);\n const format = s(body.format) || \"In-person\";\n const notes = s(body.notes);\n\n // Validate + sanitize windows against real availability.\n const windows: Window[] = [];\n if (Array.isArray(body.windows)) {\n for (const w of body.windows) {\n const day = s(w.day);\n const a = CONFIG.availability[day];\n if (!a) continue;\n let start = Number(w.start), end = Number(w.end);\n if (!Number.isFinite(start) || !Number.isFinite(end)) continue;\n start = Math.max(a.start, Math.min(start, a.end - 1));\n end = Math.min(a.end, Math.max(end, start + 1));\n windows.push({ day, start, end });\n }\n }\n\n const missing: string[] = [];\n if (!studentName) missing.push(\"student name\");\n if (!parentName) missing.push(\"parent name\");\n if (!contact) missing.push(\"contact\");\n if (windows.length === 0) missing.push(\"at least one available time\");\n if (missing.length) {\n return json(\n { ok: false, error: \"Please provide: \" + missing.join(\", \") },\n 400,\n );\n }\n\n const sub: Submission = {\n id: crypto.randomUUID().slice(0, 8),\n submittedAt: new Date().toISOString(),\n studentName,\n parentName,\n contact,\n format,\n windows,\n notes,\n };\n\n const all = await loadAll();\n all.push(sub);\n await saveAll(all);\n\n try {\n const list = sub.windows.map((w) => ` • ${fmtWindow(w)}`).join(\"\\n\");\n await email({\n subject: `New availability — ${sub.studentName}`,\n text: `New lesson availability (#${all.length})\\n\\n` +\n `Student: ${sub.studentName}\\n` +\n `Parent: ${sub.parentName}\\n` +\n `Contact: ${sub.contact}\\n` +\n `Format: ${sub.format}\\n\\n` +\n `Available times:\\n${list}\\n\\n` +\n (sub.notes ? `Notes: ${sub.notes}\\n\\n` : \"\") +\n `Review & auto-schedule: your val URL + /schedule`,\n });\n } catch (_e) {\n // Submission is safely stored even if email fails.\n }\n\n return json({ ok: true });\n}\n\n/* ========================= ADMIN ========================= */\n\nfunction gate(url: URL): string | null {\n const pw = url.searchParams.get(\"pw\") ?? \"\";\n return pw === CONFIG.adminPassword ? pw : null;\n}\n\nasync function handleAdmin(url: URL): Promise {\n const pw = gate(url);\n if (!pw) {\n const tried = (url.searchParams.get(\"pw\") ?? \"\").length > 0;\n return new Response(renderGate(tried), {\n status: tried ? 401 : 200,\n headers: { \"Content-Type\": \"text/html; charset=utf-8\" },\n });\n }\n const all = await loadAll();\n return new Response(renderAdmin(all, pw), {\n headers: { \"Content-Type\": \"text/html; charset=utf-8\" },\n });\n}\n\nasync function handleCsv(url: URL): Promise {\n if (!gate(url)) return new Response(\"Unauthorized\", { status: 401 });\n const all = await loadAll();\n const head = [\n \"Submitted\",\n \"Student\",\n \"Parent\",\n \"Contact\",\n \"Format\",\n \"Available windows\",\n \"Notes\",\n ];\n const rows = all.map((s) => [\n s.submittedAt,\n s.studentName,\n s.parentName,\n s.contact,\n s.format,\n s.windows.map(fmtWindow).join(\" | \"),\n s.notes,\n ]);\n const csv = [head, ...rows]\n .map((r) => r.map((c) => `\"${String(c).replace(/\"/g, '\"\"')}\"`).join(\",\"))\n .join(\"\\n\");\n return new Response(csv, {\n headers: {\n \"Content-Type\": \"text/csv; charset=utf-8\",\n \"Content-Disposition\": `attachment; filename=\"lesson-availability.csv\"`,\n },\n });\n}\n\nasync function handleSchedule(url: URL): Promise {\n const pw = gate(url);\n if (!pw) {\n const tried = (url.searchParams.get(\"pw\") ?? \"\").length > 0;\n return new Response(renderGate(tried), {\n status: tried ? 401 : 200,\n headers: { \"Content-Type\": \"text/html; charset=utf-8\" },\n });\n }\n const all = await loadAll();\n return new Response(renderSchedule(solve(all), pw), {\n headers: { \"Content-Type\": \"text/html; charset=utf-8\" },\n });\n}\n\n/* ===================== PARENT FORM (HTML) ===================== */\n\nfunction renderForm(): string {\n const days = CONFIG.dayPriority.map((d) => ({\n en: d,\n zh:\n {\n Monday: \"周一\",\n Wednesday: \"周三\",\n Thursday: \"周四\",\n Friday: \"周五\",\n Saturday: \"周六\",\n }[d] ?? d,\n start: CONFIG.availability[d].start,\n end: CONFIG.availability[d].end,\n }));\n const daysJson = JSON.stringify(days);\n\n return `\n\n\n\n\n${esc(CONFIG.brandName)} · ${esc(CONFIG.term)}\n\n\n\n

${esc(CONFIG.brandName)} · ${esc(CONFIG.term)}

Tell me when your child can take lessons

Mark every time that works — I'll build the timetable around what fits.
\n 请勾选所有方便上课的时间,我会据此安排九月至十二月的课表。

Instructor · ${esc(CONFIG.instructor)}

\n\n

Student 学生信息

Student name 学生姓名

Parent name 家长姓名

Contact 联系方式 · phone / email / WeChat

Format 上课形式\n

\n In-person 线下\n Online 线上\n Either 都可\n

\n\n

Available times 可上课时间

◆\n For each day, choose all day, set a time window, or leave it off. Lessons are one hour, on the hour.
\n 每天可选「全天」、设「时间段」,或留空表示不行。每节课一小时,整点开始。\n

\n\n

Your available times · 已选

Nothing selected yet 尚未选择

\n\n \n

${esc(CONFIG.brandName)} · ${\n esc(CONFIG.instructor)\n } · 感谢配合

\n\n\n\n`;\n}\n\n/* ===================== ADMIN GATE + VIEWS ===================== */\n\nfunction renderGate(failed: boolean): string {\n return `\nAdmin\n\n`;\n}\n\nfunction adminShell(title: string, pw: string, body: string): string {\n return `\n${\n esc(title)\n }\n

${body}

`;\n}\n\nfunction renderAdmin(all: Submission[], pw: string): string {\n const rows = [...all].reverse();\n const body = `\n

Availability submissions

\n Refresh\n Auto-schedule\n Export CSV\n

${esc(CONFIG.brandName)} · ${esc(CONFIG.instructor)} · ${\n esc(CONFIG.term)\n } · ${all.length} submission${all.length === 1 ? \"\" : \"s\"}

\n ${\n all.length === 0\n ? `

No submissions yet. Share your form link with parents.

`\n : `\n ${\n rows.map((s) =>\n `\n \n \n \n \n \n `\n ).join(\"\")\n }\n

Student	Parent / Contact	Format	Available times	When
${esc(s.studentName)}	${esc(s.parentName)} ${\n esc(s.contact)\n }	${esc(s.format)}	${\n s.windows.map((w) =>\n `${esc(fmtWindow(w))}`\n ).join(\"\")\n }${\n s.notes ? ` Note: ${esc(s.notes)} ` : \"\"\n }	${\n new Date(s.submittedAt).toLocaleString(\"en-CA\", {\n month: \"short\",\n day: \"numeric\",\n hour: \"numeric\",\n minute: \"2-digit\",\n })\n }

`\n }`;\n return adminShell(\"Submissions · \" + CONFIG.brandName, pw, body);\n}\n\nfunction renderSchedule(result: SolveResult, pw: string): string {\n const { rows, manual, placed } = result;\n\n const timetable: Record = {};\n for (const r of rows) {\n if (!r.assigned) continue;\n (timetable[r.assigned.day] ??= []).push({\n name: r.sub.studentName,\n hour: r.assigned.hour,\n });\n }\n for (const d of Object.keys(timetable)) {\n timetable[d].sort((a, b) => a.hour - b.hour);\n }\n const orderedDays = CONFIG.dayPriority.filter((d) => timetable[d]?.length);\n\n const body = `\n

Auto-schedule draft

\n ← Submissions\n ↻ Re-run\n

${\n esc(CONFIG.brandName)\n } · most-constrained students placed first · weekdays fill before Saturday · 1-hour lessons on the hour

\n\n \n\n

${placed}

Placed

${manual.length}

Need manual

${rows.length}

Total students

\n\n ${\n orderedDays.length\n ? `

Proposed timetable

${\n orderedDays.map((day) =>\n `

${day}

\n ${\n timetable[day].map((l) =>\n `

${to12h(l.hour)} – ${\n to12h(l.hour + 1)\n }

${esc(l.name)}

`\n ).join(\"\")\n }\n

`\n ).join(\"\")\n }

`\n : \"\"\n }\n\n ${\n manual.length\n ? `

⚠ Manual handling needed

\n \n ${\n manual.map((r) =>\n `\n \n \n \n `\n ).join(\"\")\n }\n

Student	Contact	Times they marked
${esc(r.sub.studentName)}	${esc(r.sub.contact)}	${\n r.sub.windows.map((w) =>\n `${esc(fmtWindow(w))}`\n ).join(\"\") \|\| 'none on a teaching day'\n }

`\n : \"\"\n }\n\n

All students

\n \n ${\n rows.map((r) =>\n `\n \n \n \n `\n ).join(\"\")\n }\n

Student	Assigned	Available times
${esc(r.sub.studentName)} ${\n esc(r.sub.contact)\n }	${\n r.assigned\n ? `${r.assigned.day} ${\n to12h(r.assigned.hour)\n }`\n : `none`\n }	${\n r.sub.windows.map((w) =>\n `${esc(fmtWindow(w))}`\n ).join(\"\")\n }${\n r.sub.notes ? ` Note: ${esc(r.sub.notes)} ` : \"\"\n }

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Admin access

Availability submissions

Auto-schedule draft

Proposed timetable

${day}

⚠ Manual handling needed

All students

Diff · v3