[{"_1":2,"_3":-5,"_4":-5},"loaderData",{"_5":6,"_7":8,"_9":10},"actionData","errors","root",{"_254":255,"_256":257},"routes/_app.x.$handle.$name",{"_97":96,"_32":45,"_105":87,"_27":106,"_13":14,"_107":-5,"_11":108,"_109":110,"_111":112,"_113":114,"_115":116,"_20":-5,"_117":-5,"_118":-5,"_119":25,"_120":121,"_122":123,"_124":-5,"_125":-5,"_126":127},"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":-5,"_53":-5,"_18":54,"_55":-5,"_56":25,"_57":-5,"_58":-5,"_59":60,"_61":62,"_63":64,"_65":66,"_67":68,"_69":-5,"_70":71,"_72":71,"_73":74,"_75":74,"_76":74,"_77":71,"_78":71,"_79":80,"_81":82,"_83":84,"_85":25},"version",43,"changes",[19],"aiChatInfo","userId",{"_20":21,"_22":23,"_24":25,"_26":25,"_27":28,"_29":28},"file",{"_30":31,"_32":28,"_33":34,"_35":37,"_38":39,"_40":14,"_41":42,"_24":25},"previous",{"_30":31,"_32":28,"_33":34,"_35":36},"deleted",false,"deletedHere","path","digest.cron.ts","latestPath","fileId","b8d56412-0c42-11f1-9959-42dde27851f2","name","fileType","interval","content","import { email } from \"https://esm.town/v/std/email\";\nimport sqlite from \"https://esm.town/v/std/sqlite@14-main/main.ts\";\nimport { ensureBooksTable, getBooks } from \"./books.ts\";\n\nexport async function main() {\n console.log(\"Running weekly digest...\");\n await ensureBooksTable();\n\n const result = await sqlite.execute(`\n SELECT isbn, MIN(price) as min_price\n FROM price_history\n WHERE checked_at >= datetime('now', '-7 days')\n GROUP BY isbn\n `);\n\n const pricesByIsbn = new Map();\n for (const row of result.rows) {\n pricesByIsbn.set(row.isbn as string, row.min_price as number);\n }\n\n const lines: string[] = [];\n let anyBelowTarget = false;\n\n const books = await getBooks();\n for (const book of books) {\n const minPrice = pricesByIsbn.get(book.isbn);\n const searchUrl = `https://www.bookfinder.com/search/?isbn=${book.isbn}&mode=isbn&st=sr&ac=qr`;\n\n if (minPrice == null) {\n lines.push(`${book.title} (ISBN: ${book.isbn})`);\n lines.push(` No price data this week`);\n lines.push(` Target: $${book.priceThreshold.toFixed(2)}`);\n lines.push(` Search: ${searchUrl}`);\n lines.push(\"\");\n continue;\n }\n\n const belowTarget = minPrice <= book.priceThreshold;\n if (belowTarget) anyBelowTarget = true;\n\n lines.push(`${belowTarget ? \"!!!\" : \" \"} ${book.title} (ISBN: ${book.isbn})`);\n lines.push(` Lowest this week: $${minPrice.toFixed(2)}`);\n lines.push(` Target: $${book.priceThreshold.toFixed(2)}`);\n lines.push(` ${belowTarget ? \"BELOW TARGET\" : \"Above target\"}`);\n lines.push(` Search: ${searchUrl}`);\n lines.push(\"\");\n }\n\n const subject = anyBelowTarget\n ? \"Weekly Book Digest - Deals Found!\"\n : \"Weekly Book Digest\";\n\n await email({\n subject,\n text: `Weekly Price Digest\\n${\"=\".repeat(40)}\\n\\n${lines.join(\"\\n\")}`,\n });\n\n console.log(\"Digest email sent!\");\n}\n","import { email } from \"https://esm.town/v/std/email\";\nimport sqlite from \"https://esm.town/v/std/sqlite@14-main/main.ts\";\nimport { ensureBooksTable, getBooks } from \"./books.ts\";\n\ninterface BookDigestEntry {\n title: string;\n isbn: string;\n lowestThisWeek: number | null;\n medianPrice: number | null;\n pctBelowMedian: number | null;\n isDeal: boolean;\n hasThreshold: boolean;\n priceThreshold: number | null;\n hitTarget: boolean;\n reason: string;\n}\n\nfunction computeMedian(prices: number[]): number {\n const sorted = [...prices].sort((a, b) => a - b);\n const mid = Math.floor(sorted.length / 2);\n return sorted.length % 2 === 0\n ? (sorted[mid - 1] + sorted[mid]) / 2\n : sorted[mid];\n}\n\nexport async function main() {\n console.log(\"Running weekly digest...\");\n await ensureBooksTable();\n\n // Get lowest price this week per book\n const weekResult = await sqlite.execute(`\n SELECT isbn, MIN(price) as min_price\n FROM price_history\n WHERE checked_at >= datetime('now', '-7 days')\n GROUP BY isbn\n `);\n\n const weekPricesByIsbn = new Map();\n for (const row of weekResult.rows) {\n weekPricesByIsbn.set(row.isbn as string, row.min_price as number);\n }\n\n const books = await getBooks();\n const entries: BookDigestEntry[] = [];\n\n for (const book of books) {\n const lowestThisWeek = weekPricesByIsbn.get(book.isbn) ?? null;\n\n // Get full price history for median calculation\n const histResult = await sqlite.execute({\n sql: `SELECT price FROM price_history WHERE isbn = ? ORDER BY checked_at ASC`,\n args: [book.isbn],\n });\n const allPrices = histResult.rows.map((r) => r.price as number);\n\n let medianPrice: number | null = null;\n let pctBelowMedian: number | null = null;\n let isDeal = false;\n let reason = \"\";\n\n if (allPrices.length >= 5 && lowestThisWeek != null) {\n medianPrice = computeMedian(allPrices);\n pctBelowMedian = ((medianPrice - lowestThisWeek) / medianPrice) * 100;\n\n const mean = allPrices.reduce((s, p) => s + p, 0) / allPrices.length;\n const variance = allPrices.reduce((s, p) => s + (p - mean) ** 2, 0) / allPrices.length;\n const stddev = Math.sqrt(variance);\n\n const statsThreshold = medianPrice - 1.5 * stddev;\n const halfMedian = medianPrice * 0.5;\n const dealThreshold = Math.max(statsThreshold, halfMedian);\n\n isDeal = lowestThisWeek <= dealThreshold;\n reason = isDeal\n ? `${pctBelowMedian.toFixed(0)}% below median`\n : \"Normal price range\";\n } else if (lowestThisWeek != null && lowestThisWeek < 5) {\n isDeal = true;\n reason = \"Under $5 — automatic deal\";\n } else if (allPrices.length < 5) {\n reason = `Gathering data (${allPrices.length}/5 checks)`;\n } else {\n reason = \"No price data this week\";\n }\n\n // Threshold-based logic for books with explicit targets\n const hasThreshold = book.priceThreshold != null;\n const hitTarget = hasThreshold && lowestThisWeek != null\n ? lowestThisWeek <= book.priceThreshold!\n : false;\n\n entries.push({\n title: book.title,\n isbn: book.isbn,\n lowestThisWeek,\n medianPrice,\n pctBelowMedian,\n isDeal: isDeal || hitTarget,\n hasThreshold,\n priceThreshold: book.priceThreshold,\n hitTarget,\n reason,\n });\n }\n\n // Only include books with interesting activity (deals, target hits, or significant price movement)\n const interestingEntries = entries.filter((e) => {\n if (e.isDeal || e.hitTarget) return true;\n // Include if price dropped notably below median (even if not a \"deal\")\n if (e.pctBelowMedian != null && e.pctBelowMedian > 10) return true;\n return false;\n });\n\n const dealCount = entries.filter((e) => e.isDeal).length;\n\n const lines: string[] = [];\n\n if (interestingEntries.length === 0) {\n lines.push(\"No notable deals or price movements this week.\");\n lines.push(`Tracking ${entries.length} books.`);\n lines.push(\"\");\n }\n\n for (const e of interestingEntries) {\n const searchUrl = `https://www.bookfinder.com/search/?isbn=${e.isbn}&mode=isbn&st=sr&ac=qr`;\n const marker = e.isDeal ? \"!!!\" : \" \";\n\n lines.push(`${marker} ${e.title} (ISBN: ${e.isbn})`);\n\n if (e.lowestThisWeek != null) {\n lines.push(` Lowest this week: $${e.lowestThisWeek.toFixed(2)}`);\n } else {\n lines.push(` No price data this week`);\n }\n\n if (e.medianPrice != null) {\n lines.push(` Median price: $${e.medianPrice.toFixed(2)}`);\n }\n\n if (e.pctBelowMedian != null && e.pctBelowMedian > 0) {\n lines.push(` ${e.pctBelowMedian.toFixed(0)}% below median`);\n }\n\n if (e.hasThreshold) {\n lines.push(` Target: $${e.priceThreshold!.toFixed(2)} ${e.hitTarget ? \"— HIT!\" : \"\"}`);\n }\n\n lines.push(` ${e.reason}`);\n lines.push(` Search: ${searchUrl}`);\n lines.push(\"\");\n }\n\n // Summary footer\n const gatheringData = entries.filter((e) => e.medianPrice == null && !e.isDeal).length;\n if (gatheringData > 0) {\n lines.push(`(${gatheringData} books still gathering price data)`);\n }\n\n const subject = dealCount > 0\n ? `Weekly Book Deals - ${dealCount} deal${dealCount === 1 ? \"\" : \"s\"} found!`\n : \"Weekly Book Deals\";\n\n await email({\n subject,\n text: `Weekly Book Deals\\n${\"=\".repeat(40)}\\n\\n${lines.join(\"\\n\")}`,\n });\n\n console.log(\"Digest email sent!\");\n}\n","createdAt",["D",1771991937114],"branchVersion","branchId","beea2462-ece6-11f0-b082-42dde27851f2","id","bee9b108-ece6-11f0-b082-42dde27851f2","used_book_price_check",["D",1767913623802],"deletedAt","legacyEnvVars","privacy","public","httpPrivacy","description","imageUrl","f70205b0-2223-11f0-9b13-dfe0c265f9b2","pinnedFileId","pinPreview","pinMigrated","screenshotVersion","likeCount",1,"orgId","e7fa224c-708c-4eec-b658-5e34106ab50f","tursoName","bee9b108ece611f0b08242dde27851f2","tursoHostname","bee9b108ece611f0b08242dde27851f2-val-town.aws-us-east-2.turso.io","tursoMeasuredAt",["D",1789542098478],"pinned","userPerm","r","valPerm","blobPerm","rw","emailPerm","sqlitePerm","projectPerm","telemetryPerm","user",{"_97":96,"_104":100},"org",{"_97":96,"_98":-5,"_99":100,"_18":54,"_101":102,"_103":25},"branch",{"_13":86,"_32":87,"_43":42,"_88":44,"_89":-5,"_90":-5,"_91":-5,"_92":-5,"_93":-5,"_94":45,"_95":96},"isOwned",136,"main","projectId","forkedBranchId","forkedBranchVersion","forkedProjectPrivacy","forkedProjectId","forkedProjectOrgId","projectName","userHandle","dubin","handle","displayName","avatar","https://img.clerk.com/eyJ0eXBlIjoiZGVmYXVsdCIsImlpZCI6Imluc18yTm10cGhQUklwU0tqZHNiOHNnNGd2ZjJURFUiLCJyaWQiOiJ1c2VyXzJ3RXcxYzN6QnFaaGJQaE9HTnY4WHV1VXV4ZyJ9","tier","free","canRestrictVals","profileImageUrl","branchName","","adoptOrgId",{"_43":44,"_32":45,"_38":249,"_47":-5,"_48":25,"_49":50,"_51":50,"_52":-5,"_53":-5,"_18":54,"_55":-5,"_56":25,"_57":-5,"_58":-5,"_59":60,"_61":62,"_63":64,"_65":66,"_67":250,"_69":-5,"_70":71,"_72":71,"_73":74,"_75":74,"_76":74,"_77":71,"_78":71,"_79":251,"_81":252,"_83":253,"_85":25},"tree",[207,209,210,211,212,213,214,215],"files",[207,208,209,210,211,212,213,214,215],"counts",{"_197":158,"_198":60,"_199":158,"_200":201,"_202":203},"contents",[128,129,130,131,132,133,134,135],"upstreamProject","upstreamBranch","emptyEnvVars","flags",[],"hasHttpFiles",true,"grants","orgs","customDomains",{},{"_43":190,"_32":191,"_30":192,"_139":-5,"_41":42,"_40":193,"_141":123,"_38":194,"_13":158,"_33":195,"_35":-5,"_24":25,"_146":-5,"_27":196},{"_43":183,"_32":184,"_30":185,"_139":-5,"_41":42,"_40":186,"_141":123,"_38":187,"_13":158,"_33":20,"_35":188,"_24":25,"_146":-5,"_27":189},{"_43":176,"_32":177,"_30":178,"_139":-5,"_41":42,"_40":179,"_141":123,"_38":180,"_13":158,"_33":20,"_35":181,"_24":25,"_146":-5,"_27":182},{"_43":168,"_32":169,"_30":170,"_139":-5,"_41":42,"_40":171,"_141":25,"_38":172,"_13":143,"_33":173,"_35":174,"_24":25,"_146":-5,"_27":175},{"_43":161,"_32":162,"_30":163,"_139":-5,"_41":42,"_40":164,"_141":25,"_38":165,"_13":156,"_33":34,"_35":166,"_24":25,"_146":-5,"_27":167},{"_43":153,"_32":154,"_30":155,"_139":-5,"_41":42,"_40":156,"_141":123,"_38":157,"_13":158,"_33":20,"_35":159,"_24":25,"_146":-5,"_27":160},{"_43":149,"_32":28,"_30":31,"_139":-5,"_41":42,"_40":14,"_141":25,"_38":150,"_13":151,"_33":34,"_35":37,"_24":25,"_146":-5,"_27":152},{"_43":136,"_32":137,"_30":138,"_139":-5,"_41":42,"_40":140,"_141":25,"_38":142,"_13":143,"_33":144,"_35":145,"_24":25,"_146":147,"_27":148},"04f3115c-0c4b-11f1-b5a3-42dde27851f2","ui.http.ts","22f1044e-0c4a-11f1-8df8-42dde27851f2","parentId",39,"latest",["D",1771365177011],2,"http","import sqlite from \"https://esm.town/v/std/sqlite@14-main/main.ts\";\nimport { ensureBooksTable, getBooks } from \"./books.ts\";\n\ninterface Book {\n isbn: string;\n title: string;\n price_threshold: number;\n}\n\ninterface PriceRecord {\n isbn: string;\n price: number;\n checked_at: string;\n}\n\ninterface BookWithHistory extends Book {\n history: PriceRecord[];\n latestPrice: number | null;\n latestDate: string | null;\n}\n\nfunction escapeHtml(s: string): string {\n return s.replace(/&/g, \"&\").replace(//g, \">\").replace(/\"/g, \""\");\n}\n\nfunction html(books: BookWithHistory[], lastCheck: string | null) {\n const totalBooks = books.length;\n const belowTarget = books.filter(\n (b) => b.latestPrice !== null && b.latestPrice <= b.price_threshold,\n ).length;\n\n const summaryBar = `\n

${totalBooks}

Books Tracked

${belowTarget}

At / Below Target

${lastCheck ? new Date(lastCheck + \"Z\").toLocaleString(\"en-US\", { dateStyle: \"medium\", timeStyle: \"short\" }) : \"Never\"}

Last Price Check

`;\n\n const cards = books.map((b) => {\n const safeTitle = escapeHtml(b.title);\n const safeIsbn = escapeHtml(b.isbn);\n\n let badgeClass: string;\n let badgeText: string;\n if (b.latestPrice === null) {\n badgeClass = \"badge-gray\";\n badgeText = \"No data\";\n } else if (b.latestPrice <= b.price_threshold) {\n badgeClass = \"badge-green\";\n badgeText = \"Below target\";\n } else {\n badgeClass = \"badge-red\";\n badgeText = \"Above target\";\n }\n\n const priceDisplay = b.latestPrice !== null ? `$${b.latestPrice.toFixed(2)}` : \"—\";\n\n const historyRows = b.history.slice(-10).map((h) => {\n const d = new Date(h.checked_at + \"Z\");\n const dateStr = d.toLocaleDateString(\"en-US\", { month: \"short\", day: \"numeric\" });\n const priceClass = h.price <= b.price_threshold ? \"price-good\" : \"price-high\";\n return `$${h.price.toFixed(2)} ${dateStr}`;\n }).join(\"\");\n\n const bookfinderUrl = `https://www.bookfinder.com/search/?isbn=${encodeURIComponent(b.isbn)}&mode=isbn&st=sr&ac=qr`;\n\n return `\n

${safeTitle}

\n ISBN: ${safeIsbn}\n

\n ${badgeText}\n

Latest Price

${priceDisplay}

Target

$${b.price_threshold.toFixed(2)}

\n ${b.history.length > 0 ? `

Recent Prices

${historyRows}

` : \"\"}\n

\n Search BookFinder\n \n

`;\n }).join(\"\");\n\n return `\n\n\n \n \n Book Price Tracker\n \n\n\n

Book Price Tracker

\n ${summaryBar}\n ${books.length > 0 ? cards : '

No books tracked yet. Add one below.

'}\n

Add a Book

\n \n

\n \n\n`;\n}\n\nexport default async function(req: Request): Promise {\n await ensureBooksTable();\n\n const url = new URL(req.url);\n const path = url.pathname;\n\n // GET / — Dashboard\n if (req.method === \"GET\" && (path === \"/\" || path === \"\")) {\n const booksResult = await sqlite.execute(`SELECT isbn, title, price_threshold FROM books`);\n const books = booksResult.rows as unknown as Book[];\n\n const historyResult = await sqlite.execute(\n `SELECT isbn, price, checked_at FROM price_history ORDER BY checked_at ASC`,\n );\n const history = historyResult.rows as unknown as PriceRecord[];\n\n const historyByIsbn = new Map();\n for (const h of history) {\n const list = historyByIsbn.get(h.isbn) || [];\n list.push(h);\n historyByIsbn.set(h.isbn, list);\n }\n\n const booksWithHistory: BookWithHistory[] = books.map((b) => {\n const bookHistory = historyByIsbn.get(b.isbn) || [];\n const latest = bookHistory.length > 0 ? bookHistory[bookHistory.length - 1] : null;\n return {\n ...b,\n history: bookHistory,\n latestPrice: latest ? latest.price : null,\n latestDate: latest ? latest.checked_at : null,\n };\n });\n\n const lastCheckRow = await sqlite.execute(\n `SELECT checked_at FROM price_history ORDER BY checked_at DESC LIMIT 1`,\n );\n const lastCheck = lastCheckRow.rows.length > 0\n ? (lastCheckRow.rows[0] as unknown as { checked_at: string }).checked_at\n : null;\n\n return new Response(html(booksWithHistory, lastCheck), {\n headers: { \"Content-Type\": \"text/html\" },\n });\n }\n\n // GET /api/books\n if (req.method === \"GET\" && path === \"/api/books\") {\n const books = await getBooks();\n return Response.json(books);\n }\n\n // GET /api/price-history\n if (req.method === \"GET\" && path === \"/api/price-history\") {\n const result = await sqlite.execute(\n `SELECT ph.isbn, b.title, ph.price, ph.checked_at\n FROM price_history ph\n LEFT JOIN books b ON b.isbn = ph.isbn\n ORDER BY ph.isbn, ph.checked_at ASC`,\n );\n const rows = result.rows as unknown as { isbn: string; title: string; price: number; checked_at: string }[];\n\n const grouped: Record = {};\n for (const r of rows) {\n if (!grouped[r.isbn]) {\n grouped[r.isbn] = { title: r.title, history: [] };\n }\n grouped[r.isbn].history.push({ price: r.price, checked_at: r.checked_at });\n }\n\n return Response.json(grouped);\n }\n\n // POST /api/books\n if (req.method === \"POST\" && path === \"/api/books\") {\n const { isbn, title, priceThreshold } = await req.json();\n if (!isbn || !title || priceThreshold == null) {\n return Response.json({ error: \"isbn, title, and priceThreshold are required\" }, { status: 400 });\n }\n await sqlite.execute({\n sql: `INSERT OR REPLACE INTO books (isbn, title, price_threshold) VALUES (?, ?, ?)`,\n args: [isbn, title, priceThreshold],\n });\n return Response.json({ ok: true });\n }\n\n // DELETE /api/books/:isbn\n if (req.method === \"DELETE\" && path.startsWith(\"/api/books/\")) {\n const isbn = decodeURIComponent(path.slice(\"/api/books/\".length));\n await sqlite.execute({\n sql: `DELETE FROM books WHERE isbn = ?`,\n args: [isbn],\n });\n return Response.json({ ok: true });\n }\n\n return Response.json({ error: \"Not found\" }, { status: 404 });\n}\n","label","dubin-used-books",[137],"4f1e4bee-11fe-11f1-9b96-42dde27851f2",["D",1771991937114],4,[28],"b8e88e52-0c42-11f1-9d3d-42dde27851f2","deno.json","b8e88f1a-0c42-11f1-9d3d-42dde27851f2",22,["D",1771361613309],0,"{\n \"$schema\": \"https://raw.githubusercontent.com/denoland/deno/98f62cee78e85bfc47c62ed703777c6bc8794f1c/cli/schemas/config-file.v1.json\",\n \"lock\": false,\n \"compilerOptions\": {\n \"noImplicitAny\": false,\n \"strict\": true,\n \"types\": [\"https://www.val.town/types/valtown.d.ts\"],\n \"lib\": [\n \"dom\",\n \"dom.iterable\",\n \"dom.asynciterable\",\n \"deno.ns\",\n \"deno.unstable\"\n ]\n },\n \"lint\": {\n \"include\": [\"deno:/https/esm.town/**/*\"],\n \"rules\": {\n \"exclude\": [\"no-explicit-any\"]\n }\n },\n \"node_modules_dir\": false,\n \"experimental\": {\n \"unstable-node-globals\": true,\n \"unstable-temporal\": true,\n \"unstable-worker-options\": true,\n \"unstable-sloppy-imports\": true\n }\n}",[154],"4f16f5f6-11fe-11f1-8c23-42dde27851f2","check.cron.ts","beed2fd6-ece6-11f0-b082-42dde27851f2",42,["D",1771991937120],"import { email } from \"https://esm.town/v/std/email\";\nimport sqlite from \"https://esm.town/v/std/sqlite@14-main/main.ts\";\nimport { type Book, ensureBooksTable, getBooks } from \"./books.ts\";\n\nasync function ensureTable() {\n await sqlite.execute(`\n CREATE TABLE IF NOT EXISTS price_history (\n id INTEGER PRIMARY KEY AUTOINCREMENT,\n isbn TEXT NOT NULL,\n price REAL NOT NULL,\n checked_at TEXT NOT NULL DEFAULT (datetime('now'))\n )\n `);\n}\n\nasync function recordPrice(isbn: string, price: number) {\n await sqlite.execute({\n sql: `INSERT INTO price_history (isbn, price, checked_at) VALUES (?, ?, datetime('now'))`,\n args: [isbn, price],\n });\n}\n\ninterface DealScore {\n isDeal: boolean;\n currentPrice: number;\n medianPrice: number | null;\n pctBelowMedian: number | null;\n reason: string;\n}\n\nasync function scoreDeal(isbn: string, currentPrice: number): Promise {\n // Absolute floor: any book under $5 is always a deal\n if (currentPrice < 5) {\n return {\n isDeal: true,\n currentPrice,\n medianPrice: null,\n pctBelowMedian: null,\n reason: `Price $${currentPrice.toFixed(2)} is under $5 — automatic deal`,\n };\n }\n\n const result = await sqlite.execute({\n sql: `SELECT price FROM price_history WHERE isbn = ? ORDER BY checked_at ASC`,\n args: [isbn],\n });\n\n const prices = result.rows.map((r) => r.price as number);\n\n if (prices.length < 5) {\n return {\n isDeal: false,\n currentPrice,\n medianPrice: null,\n pctBelowMedian: null,\n reason: `Only ${prices.length}/5 data points — need more history`,\n };\n }\n\n // Calculate median\n const sorted = [...prices].sort((a, b) => a - b);\n const mid = Math.floor(sorted.length / 2);\n const median = sorted.length % 2 === 0\n ? (sorted[mid - 1] + sorted[mid]) / 2\n : sorted[mid];\n\n // Calculate standard deviation\n const mean = prices.reduce((s, p) => s + p, 0) / prices.length;\n const variance = prices.reduce((s, p) => s + (p - mean) ** 2, 0) / prices.length;\n const stddev = Math.sqrt(variance);\n\n const pctBelowMedian = ((median - currentPrice) / median) * 100;\n\n // Exceptional deal: below median - 1.5*stddev OR below 50% of median (whichever is more generous)\n const statsThreshold = median - 1.5 * stddev;\n const halfMedian = median * 0.5;\n // \"More generous\" means whichever threshold is higher (easier to qualify)\n const dealThreshold = Math.max(statsThreshold, halfMedian);\n\n const isDeal = currentPrice <= dealThreshold;\n\n return {\n isDeal,\n currentPrice,\n medianPrice: median,\n pctBelowMedian,\n reason: isDeal\n ? `$${currentPrice.toFixed(2)} is ${pctBelowMedian.toFixed(0)}% below median $${median.toFixed(2)}`\n : `$${currentPrice.toFixed(2)} is within normal range (median $${median.toFixed(2)})`,\n };\n}\n\nasync function checkBookPrice(book: Book) {\n const url =\n `https://www.bookfinder.com/search/?isbn=${book.isbn}&mode=isbn&st=sr&ac=qr`;\n\n const response = await fetch(url, {\n headers: {\n \"User-Agent\":\n \"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36\",\n },\n });\n\n if (!response.ok) {\n return { book, lowestPrice: null, url, error: `HTTP ${response.status}` };\n }\n\n const html = await response.text();\n const prices: number[] = [];\n\n const regex = /\\$([0-9,]+\\.[0-9]{2})<\\/span>/g;\n let match;\n\n while ((match = regex.exec(html)) !== null) {\n const price = parseFloat(match[1].replace(/,/g, \"\"));\n if (price > 0 && price < 10000) prices.push(price);\n }\n\n if (prices.length === 0) {\n return { book, lowestPrice: null, url, error: \"No prices found\" };\n }\n\n return {\n book,\n lowestPrice: Math.min(...prices),\n prices: prices.sort((a, b) => a - b),\n url,\n };\n}\n\nexport async function main() {\n console.log(\"Checking book prices...\");\n await ensureTable();\n await ensureBooksTable();\n\n const books = await getBooks();\n for (const book of books) {\n const result = await checkBookPrice(book);\n\n if (result.error) {\n console.log(`${book.title}: Error - ${result.error}`);\n continue;\n }\n\n await recordPrice(book.isbn, result.lowestPrice);\n\n // Books with an explicit threshold: use the old target-based logic\n if (book.priceThreshold != null) {\n const hitTarget = result.lowestPrice <= book.priceThreshold + 1;\n console.log(\n `${book.title}: $${result.lowestPrice.toFixed(2)} (target: $${book.priceThreshold})`,\n );\n console.log({ hitTarget, dateTimeChecked: new Date().toLocaleString() });\n\n if (hitTarget) {\n await email({\n subject: `Book Alert: ${book.title} is $${result.lowestPrice.toFixed(2)}!`,\n text: `HIT TARGET!\\n\\nLowest: $${result.lowestPrice.toFixed(2)}\\nYour target: $${book.priceThreshold.toFixed(2)}\\n\\nTop 5 prices: ${result.prices.slice(0, 5).map((p) => `$${p}`).join(\", \")}\\n\\nBuy: ${result.url}`,\n });\n console.log(\"Email sent!\");\n }\n continue;\n }\n\n // Auto-detect mode: use deal scoring\n const deal = await scoreDeal(book.isbn, result.lowestPrice);\n console.log(\n `${book.title}: $${result.lowestPrice.toFixed(2)} — ${deal.reason}`,\n );\n\n if (deal.isDeal) {\n const medianStr = deal.medianPrice != null\n ? `$${deal.medianPrice.toFixed(2)}`\n : \"unknown\";\n const pctStr = deal.pctBelowMedian != null\n ? `${deal.pctBelowMedian.toFixed(0)}% below median`\n : \"\";\n\n await email({\n subject: `Deal Alert: ${book.title} is $${deal.currentPrice.toFixed(2)} (usually ${medianStr})!`,\n text: `${deal.reason}\\n\\nCurrent price: $${deal.currentPrice.toFixed(2)}\\nMedian price: ${medianStr}\\n${pctStr ? pctStr + \"\\n\" : \"\"}\\nTop 5 prices: ${result.prices.slice(0, 5).map((p) => `$${p}`).join(\", \")}\\n\\nBuy: ${result.url}`,\n });\n console.log(\"Deal email sent!\");\n }\n }\n}\n",[162],"22f8e63c-0c4a-11f1-b6f8-42dde27851f2","books.ts","b8ff597a-0c42-11f1-b2fa-42dde27851f2",35,["D",1771364797805],"script","import sqlite from \"https://esm.town/v/std/sqlite@14-main/main.ts\";\n\nexport interface Book {\n isbn: string;\n title: string;\n priceThreshold: number;\n}\n\nconst SEED_BOOKS: Book[] = [\n {\n isbn: \"9780415419970\",\n title: \"A Frequency Dictionary of Portuguese\",\n priceThreshold: 20.00,\n },\n {\n isbn: \"9780761137870\",\n title: \"660 Curries\",\n priceThreshold: 20.00,\n },\n {\n isbn: \"8508130627\",\n title: \"Para Gostar de Ler\",\n priceThreshold: 10.00,\n },\n];\n\nexport async function ensureBooksTable() {\n await sqlite.execute(`\n CREATE TABLE IF NOT EXISTS books (\n isbn TEXT PRIMARY KEY,\n title TEXT NOT NULL,\n price_threshold REAL NOT NULL\n )\n `);\n\n for (const book of SEED_BOOKS) {\n await sqlite.execute({\n sql: `INSERT OR IGNORE INTO books (isbn, title, price_threshold) VALUES (?, ?, ?)`,\n args: [book.isbn, book.title, book.priceThreshold],\n });\n }\n}\n\nexport async function getBooks(): Promise {\n const result = await sqlite.execute(`SELECT isbn, title, price_threshold FROM books`);\n return result.rows.map((row) => ({\n isbn: row.isbn as string,\n title: row.title as string,\n priceThreshold: row.price_threshold as number,\n }));\n}\n",[169],"b8c7d14e-0c42-11f1-bab7-42dde27851f2","AGENTS.md","b8c7d20c-0c42-11f1-bab7-42dde27851f2",19,["D",1771361613259],"You are an advanced assistant specialized in generating Val Town code.\n\n## Core Guidelines\n\n- Ask clarifying questions when requirements are ambiguous\n- Provide complete, functional solutions rather than skeleton implementations\n- Test your logic against edge cases before presenting the final solution\n- Ensure all code follows Val Town's specific platform requirements\n- If a section of code that you're working on is getting too complex, consider refactoring it into subcomponents\n\n## Code Standards\n\n- Generate code in TypeScript or TSX\n- Add appropriate TypeScript types and interfaces for all data structures\n- Prefer official SDKs or libraries than writing API calls directly\n- Ask the user to supply API or library documentation if you are at all unsure about it\n- **Never bake in secrets into the code** - always use environment variables\n- Include comments explaining complex logic (avoid commenting obvious operations)\n- Follow modern ES6+ conventions and functional programming practices if possible\n\n## Types of triggers\n\n### 1. HTTP Trigger\n\n- Create web APIs and endpoints\n- Handle HTTP requests and responses\n- Example structure:\n\n```ts\nexport default async function (req: Request) {\n return new Response(\"Hello World\");\n}\n```\n\nFiles that are HTTP triggers have http in their name like `foobar.http.tsx`\n\n### 2. Cron Triggers\n\n- Run on a schedule\n- Use cron expressions for timing\n- Example structure:\n\n```ts\nexport default async function () {\n // Scheduled task code\n}\n```\n\nFiles that are Cron triggers have cron in their name like `foobar.cron.tsx`\n\n### 3. Email Triggers\n\n- Process incoming emails\n- Handle email-based workflows\n- Example structure:\n\n```ts\nexport default async function (email: Email) {\n // Process email\n}\n```\n\nFiles that are Email triggers have email in their name like `foobar.email.tsx`\n\n\n## Val Town Standard Libraries\n\nVal Town provides several hosted services and utility functions.\n\n### Blob Storage\n\n```ts\nimport { blob } from \"https://esm.town/v/std/blob\";\nawait blob.setJSON(\"myKey\", { hello: \"world\" });\nlet blobDemo = await blob.getJSON(\"myKey\");\nlet appKeys = await blob.list(\"app_\");\nawait blob.delete(\"myKey\");\n```\n\n### SQLite\n\n```ts\nimport { sqlite } from \"https://esm.town/v/stevekrouse/sqlite\";\nconst TABLE_NAME = 'todo_app_users_2';\n// Create table - do this before usage and change table name when modifying schema\nawait sqlite.execute(`CREATE TABLE IF NOT EXISTS ${TABLE_NAME} (\n id INTEGER PRIMARY KEY AUTOINCREMENT,\n name TEXT NOT NULL\n)`);\n// Query data\nconst result = await sqlite.execute(`SELECT * FROM ${TABLE_NAME} WHERE id = ?`, [1]);\n```\n\nNote: When changing a SQLite table's schema, change the table's name (e.g., add _2 or _3) to create a fresh table.\n\n### OpenAI\n\n```ts\nimport { OpenAI } from \"https://esm.town/v/std/openai\";\nconst openai = new OpenAI();\nconst completion = await openai.chat.completions.create({\n messages: [\n { role: \"user\", content: \"Say hello in a creative way\" },\n ],\n model: \"gpt-4o-mini\",\n max_tokens: 30,\n});\n```\n\n### Email\n\n```ts\nimport { email } from \"https://esm.town/v/std/email\";\n// By default emails the owner of the val\nawait email({ \n subject: \"Hi\", \n text: \"Hi\", \n html: \"

Hi

\"\n});\n```\n\n## Val Town Utility Functions\n\nVal Town provides several utility functions to help with common project tasks.\n\n### Importing Utilities\n\nAlways import utilities with version pins to avoid breaking changes:\n\n```ts\nimport { parseProject, readFile, serveFile } from \"https://esm.town/v/std/utils@85-main/index.ts\";\n```\n\n### Available Utilities\n\n\n#### **serveFile** - Serve project files with proper content types\n\nFor example, in Hono:\n\n```ts\n// serve all files in frontend/ and shared/\napp.get(\"/frontend/*\", c => serveFile(c.req.path, import.meta.url));\napp.get(\"/shared/*\", c => serveFile(c.req.path, import.meta.url));\n```\n\n#### **readFile** - Read files from within the project:\n\n```ts\n// Read a file from the project\nconst fileContent = await readFile(\"/frontend/index.html\", import.meta.url);\n```\n\n#### **listFiles** - List all files in the project\n\n```ts\nconst files = await listFiles(import.meta.url);\n```\n\n#### **parseProject** - Extract information about the current project from import.meta.url\n\nThis is useful for including info for linking back to a val, ie in \"view source\" urls:\n\n```ts\nconst projectVal = parseProject(import.meta.url);\nconsole.log(projectVal.username); // Owner of the project\nconsole.log(projectVal.name); // Project name\nconsole.log(projectVal.version); // Version number\nconsole.log(projectVal.branch); // Branch name\nconsole.log(projectVal.links.self.project); // URL to the project page\n```\n\nHowever, it's *extremely importing* to note that `parseProject` and other Standard Library utilities ONLY RUN ON THE SERVER.\nIf you need access to this data on the client, run it in the server and pass it to the client by splicing it into the HTML page\nor by making an API request for it.\n\n## Val Town Platform Specifics\n\n- **Redirects:** Use `return new Response(null, { status: 302, headers: { Location: \"/place/to/redirect\" }})` instead of `Response.redirect` which is broken\n- **Images:** Avoid external images or base64 images. Use emojis, unicode symbols, or icon fonts/libraries instead\n- **AI Image:** To inline generate an AI image use: `

`\n- **Storage:** DO NOT use the Deno KV module for storage\n- **Browser APIs:** DO NOT use the `alert()`, `prompt()`, or `confirm()` methods\n- **Weather Data:** Use open-meteo for weather data (doesn't require API keys) unless otherwise specified\n- **View Source:** Add a view source link by importing & using `import.meta.url.replace(\"ems.sh\", \"val.town)\"` (or passing this data to the client) and include `target=\"_top\"` attribute\n- **Error Debugging:** Add `` to HTML to capture client-side errors\n- **Error Handling:** Only use try...catch when there's a clear local resolution; Avoid catches that merely log or return 500s. Let errors bubble up with full context\n- **Environment Variables:** Use `Deno.env.get('keyname')` when you need to, but generally prefer APIs that don't require keys\n- **Imports:** Use `https://esm.sh` for npm and Deno dependencies to ensure compatibility on server and browser\n- **Storage Strategy:** Only use backend storage if explicitly required; prefer simple static client-side sites\n- **React Configuration:** When using React libraries, pin versions with `?deps=react@18.2.0,react-dom@18.2.0` and start the file with `/** @jsxImportSource https://esm.sh/react@18.2.0 */`\n- Ensure all React dependencies and sub-dependencies are pinned to the same version\n- **Styling:** Default to using TailwindCSS via `` unless otherwise specified\n\n## Project Structure and Design Patterns\n\n### Recommended Directory Structure\n```\n├── backend/\n│ ├── database/\n│ │ ├── migrations.ts # Schema definitions\n│ │ ├── queries.ts # DB query functions\n│ │ └── README.md\n│ └── routes/ # Route modules\n│ ├── [route].ts\n│ └── static.ts # Static file serving\n│ ├── index.ts # Main entry point\n│ └── README.md\n├── frontend/\n│ ├── components/\n│ │ ├── App.tsx\n│ │ └── [Component].tsx\n│ ├── favicon.svg\n│ ├── index.html # Main HTML template\n│ ├── index.tsx # Frontend JS entry point\n│ ├── README.md\n│ └── style.css\n├── README.md\n└── shared/\n ├── README.md\n └── utils.ts # Shared types and functions\n```\n\n### Backend (Hono) Best Practices\n\n- Hono is the recommended API framework\n- Main entry point should be `backend/index.ts`\n- **Static asset serving:** Use the utility functions to read and serve project files:\n ```ts\n import { readFile, serveFile } from \"https://esm.town/v/std/utils@85-main/index.ts\";\n \n // serve all files in frontend/ and shared/\n app.get(\"/frontend/*\", c => serveFile(c.req.path, import.meta.url));\n app.get(\"/shared/*\", c => serveFile(c.req.path, import.meta.url));\n \n // For index.html, often you'll want to bootstrap with initial data\n app.get(\"/\", async c => {\n let html = await readFile(\"/frontend/index.html\", import.meta.url);\n \n // Inject data to avoid extra round-trips\n const initialData = await fetchInitialData();\n const dataScript = ``;\n \n html = html.replace(\"\", `${dataScript}`);\n return c.html(html);\n });\n ```\n- Create RESTful API routes for CRUD operations\n- Always include this snippet at the top-level Hono app to re-throwing errors to see full stack traces:\n ```ts\n // Unwrap Hono errors to see original error details\n app.onError((err, c) => {\n throw err;\n });\n ```\n\n### Database Patterns\n- Run migrations on startup or comment out for performance\n- Change table names when modifying schemas rather than altering\n- Export clear query functions with proper TypeScript typing\n\n## Common Gotchas and Solutions\n\n1. **Environment Limitations:** \n - Val Town runs on Deno in a serverless context, not Node.js\n - Code in `shared/` must work in both frontend and backend environments\n - Cannot use `Deno` keyword in shared code\n - Use `https://esm.sh` for imports that work in both environments\n\n2. **SQLite Peculiarities:**\n - Limited support for ALTER TABLE operations\n - Create new tables with updated schemas and copy data when needed\n - Always run table creation before querying\n\n3. **React Configuration:**\n - All React dependencies must be pinned to 18.2.0\n - Always include `@jsxImportSource https://esm.sh/react@18.2.0` at the top of React files\n - Rendering issues often come from mismatched React versions\n\n4. **File Handling:**\n - Val Town only supports text files, not binary\n - Use the provided utilities to read files across branches and forks\n - For files in the project, use `readFile` helpers\n\n5. **API Design:**\n - `fetch` handler is the entry point for HTTP vals\n - Run the Hono app with `export default app.fetch // This is the entry point for HTTP 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