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Its news tab was grey placeholder\n * rows. Both come from Yahoo Finance here.\n *\n * Two routes off one val rather than two vals: they share the cache helper\n * and the same failure policy, and the app only has to know one host.\n *\n * / ?symbol=AAPL&range=1M OHLC candles\n * /news ?symbol=AAPL headlines\n */\nimport { blob } from \"https://esm.town/v/std/blob\";\n\ntype Candle = { t: number; o: number; h: number; l: number; c: number };\ntype Story = {\n title: string;\n publisher: string;\n link: string;\n published: number;\n};\n\nconst RANGES: Record = {\n \"1D\": { range: \"1d\", interval: \"5m\" },\n \"1W\": { range: \"5d\", interval: \"30m\" },\n \"1M\": { range: \"1mo\", interval: \"1d\" },\n \"6M\": { range: \"6mo\", interval: \"1d\" },\n \"1Y\": { range: \"1y\", interval: \"1wk\" },\n \"5Y\": { range: \"5y\", interval: \"1mo\" },\n MAX: { range: \"max\", interval: \"3mo\" },\n};\n\nconst UA = { \"User-Agent\": \"Mozilla/5.0\" };\n\n/** Serve from blob while fresh, refetch when stale, fall back when upstream fails. */\nasync function cached(\n key: string,\n ttlMs: number,\n fetcher: () => Promise,\n): Promise<{ value: T; stale: boolean } | null> {\n let hit: { at: number; value: T } | null = null;\n try {\n hit = await blob.getJSON(key);\n } catch { /* nothing stored yet */ }\n\n if (hit && Date.now() - hit.at < ttlMs) return { value: hit.value, stale: false };\n\n try {\n const value = await fetcher();\n await blob.setJSON(key, { at: Date.now(), value });\n return { value, stale: false };\n } catch {\n // Yesterday's data beats an empty screen.\n return hit ? { value: hit.value, stale: true } : null;\n }\n}\n\nasync function fetchCandles(symbol: string, key: string): Promise {\n const { range, interval } = RANGES[key] ?? RANGES[\"1M\"];\n const res = await fetch(\n `https://query1.finance.yahoo.com/v8/finance/chart/${encodeURIComponent(symbol)}` +\n `?range=${range}&interval=${interval}`,\n { headers: UA },\n );\n if (!res.ok) throw new Error(`upstream ${res.status}`);\n const result = (await res.json())?.chart?.result?.[0];\n if (!result) throw new Error(\"no result\");\n\n const stamps: number[] = result.timestamp ?? [];\n const q = result.indicators?.quote?.[0] ?? {};\n const out: Candle[] = [];\n for (let i = 0; i < stamps.length; i++) {\n const o = q.open?.[i], h = q.high?.[i], l = q.low?.[i], c = q.close?.[i];\n // Yahoo pads the arrays with nulls for missing sessions; a candle with a\n // hole in it cannot be drawn, so it is dropped rather than zero-filled —\n // a zero would render as a spike to the floor.\n if (o == null || h == null || l == null || c == null) continue;\n out.push({\n t: stamps[i],\n o: +o.toFixed(4), h: +h.toFixed(4),\n l: +l.toFixed(4), c: +c.toFixed(4),\n });\n }\n // More than a couple of hundred candles is unreadable on a phone, so thin\n // by taking every nth rather than truncating — truncating would show only\n // one end of the period.\n const limit = 180;\n if (out.length <= limit) return out;\n const step = Math.ceil(out.length / limit);\n return out.filter((_, i) => i % step === 0);\n}\n\nasync function fetchNews(symbol: string): Promise {\n const res = await fetch(\n `https://query1.finance.yahoo.com/v1/finance/search` +\n `?q=${encodeURIComponent(symbol)}&newsCount=20"esCount=0`,\n { headers: UA },\n );\n if (!res.ok) throw new Error(`upstream ${res.status}`);\n const items = (await res.json())?.news ?? 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