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Go to https://val.town → New Val → HTTP\n * 2. Delete placeholder code, paste this entire file\n * 3. Save — your URL appears at top of the preview panel\n * e.g. https://yourname-sbahnberlin.web.val.run\n *\n * HOW TO SUBSCRIBE:\n * Google Calendar → + Other calendars → From URL → paste URL\n * Apple Calendar → File → New Calendar Subscription → paste URL\n * Set auto-refresh to \"Every 15 minutes\"\n *\n * Lines tracked: S8, S85, S9, S45, S46, S47\n *\n * Data source: v6.vbb.transport.rest\n * — queries the /journeys endpoint with a future trip on each line,\n * which returns remarks with proper validFrom / validUntil dates\n * matching what sbahn.berlin shows.\n */\n\n// ── Config ────────────────────────────────────────────────────────────────────\n\nconst TRACKED_LINES = [\"S8\", \"S85\", \"S9\", \"S45\", \"S46\", \"S47\"];\n\n// Origin → destination pairs that force a journey on each line.\n// VBB stop IDs (HAFAS 900xxxxxx format).\n// Each entry: [lineName, fromStopId, toStopId]\nconst LINE_JOURNEYS: [string, string, string][] = [\n [\"S8\", \"900120005\", \"900260004\"], // Ostkreuz → Birkenwerder\n [\"S85\", \"900120005\", \"900100001\"], // Ostkreuz → Hauptbahnhof\n [\"S9\", \"900120005\", \"900260005\"], // Ostkreuz → Flughafen BER Terminal 1-2\n [\"S45\", \"900140001\", \"900193005\"], // Südkreuz → Adlershof\n [\"S46\", \"900140001\", \"900194001\"], // Südkreuz → Grünau\n [\"S47\", \"900192002\", \"900194003\"], // Schöneweide → Spindlersfeld\n];\n\n// ── Types ─────────────────────────────────────────────────────────────────────\n\ninterface Remark {\n id?: string;\n type?: string;\n code?: string;\n summary?: string;\n text?: string;\n validFrom?: string;\n validUntil?: string;\n modified?: string;\n products?: Record;\n}\n\ninterface Leg {\n remarks?: Remark[];\n line?: { name?: string };\n}\n\ninterface Journey {\n legs?: Leg[];\n}\n\ninterface DisruptionEvent {\n uid: string;\n summary: string;\n description: string;\n start: Date;\n end: Date;\n lines: string[];\n}\n\n// ── VBB journeys API ──────────────────────────────────────────────────────────\n\nasync function fetchRemarksForLine(\n lineName: string,\n fromId: string,\n toId: string,\n): Promise<{ line: string; remark: Remark }[]> {\n // Query journeys departing in the next 30 minutes\n const when = new Date(Date.now() + 10 * 60 * 1000).toISOString();\n const url = `https://v6.vbb.transport.rest/journeys` +\n `?from=${fromId}&to=${toId}&when=${encodeURIComponent(when)}` +\n `&results=3&suburban=true&subway=false&tram=false` +\n `&bus=false&ferry=false&express=false®ional=false&remarks=true`;\n\n try {\n const res = await fetch(url, { headers: { Accept: \"application/json\" } });\n if (!res.ok) return [];\n\n const data = await res.json();\n const journeys: Journey[] = data.journeys ?? [];\n\n const seen = new Set();\n const results: { line: string; remark: Remark }[] = [];\n\n for (const journey of journeys) {\n for (const leg of journey.legs ?? []) {\n // Only look at legs that use our target line\n const legLine = leg.line?.name?.replace(/\\s+/g, \"\") ?? \"\";\n if (!legLine.toUpperCase().includes(lineName.toUpperCase())) continue;\n\n for (const r of leg.remarks ?? []) {\n if (r.type !== \"warning\" && r.type !== \"status\") continue;\n const key = r.id ?? `${r.summary}__${r.validFrom}`;\n if (seen.has(key)) continue;\n seen.add(key);\n results.push({ line: lineName, remark: r });\n }\n }\n }\n\n return results;\n } catch {\n return [];\n }\n}\n\nasync function fetchAllDisruptions(): Promise {\n // Fetch all lines in parallel\n const allResults = (\n await Promise.all(\n LINE_JOURNEYS.map(([line, from, to]) =>\n fetchRemarksForLine(line, from, to)\n ),\n )\n ).flat();\n\n // Deduplicate by remark id — group lines together for same remark\n const byKey = new Map; remark: Remark }>();\n\n for (const { line, remark: r } of allResults) {\n const key = r.id ?? `${r.summary}__${r.validFrom}`;\n if (!byKey.has(key)) {\n byKey.set(key, { lines: new Set(), remark: r });\n }\n byKey.get(key)!.lines.add(line);\n }\n\n const now = new Date();\n\n return Array.from(byKey.values()).map(\n ({ lines, remark: r }): DisruptionEvent => {\n const lineList = Array.from(lines);\n const lineTag = `[${lineList.join(\"+\")}] `;\n\n // Use actual validFrom/validUntil from the API — these match the website dates\n const start = r.validFrom ? new Date(r.validFrom) : now;\n const end = r.validUntil\n ? new Date(r.validUntil)\n : new Date(start.getTime() + 8 * 3600 * 1000);\n\n // Clean HTML from description text\n const rawText = r.text ?? r.summary ?? \"\";\n const desc = rawText\n .replace(//gi, \"\\n\")\n .replace(/<[^>]+>/g, \"\")\n .replace(/&/g, \"&\")\n .replace(/</g, \"<\")\n .replace(/>/g, \">\")\n .replace(/ /g, \" \")\n .replace(/\\s{2,}/g, \" \")\n .trim();\n\n return {\n uid: `sbahn-${\n r.id ?? Math.random().toString(36).slice(2)\n }-${start.getTime()}@vbb`,\n summary: `${lineTag}${r.summary ?? \"S-Bahn Störung\"}`,\n description: desc,\n start,\n end,\n lines: lineList,\n };\n },\n );\n}\n\n// ── ICS builder ───────────────────────────────────────────────────────────────\n\nfunction esc(s: string): string {\n return s\n .replace(/\\\\/g, \"\\\\\\\\\")\n .replace(/;/g, \"\\\\;\")\n .replace(/,/g, \"\\\\,\")\n .replace(/\\n/g, \"\\\\n\")\n .trim();\n}\n\nfunction icsDate(d: Date): string {\n return d.toISOString().replace(/[-:]/g, \"\").split(\".\")[0] + \"Z\";\n}\n\n// RFC 5545: fold lines longer than 75 octets\nfunction fold(line: string): string {\n const chunks: string[] = [];\n while (line.length > 75) {\n chunks.push(line.slice(0, 75));\n line = \" \" + line.slice(75);\n }\n chunks.push(line);\n return chunks.join(\"\\r\\n\");\n}\n\nfunction buildICS(events: DisruptionEvent[]): string {\n const now = icsDate(new Date());\n\n const header = [\n \"BEGIN:VCALENDAR\",\n \"VERSION:2.0\",\n \"PRODID:-//S-Bahn Berlin Störungen//Val.town//DE\",\n \"CALSCALE:GREGORIAN\",\n \"METHOD:PUBLISH\",\n \"X-WR-CALNAME:S-Bahn Störungen (S8·S85·S9·S45-47)\",\n \"X-WR-CALDESC:Live Störungen für S8, S85, S9, S45, S46, S47 — Quelle: VBB\",\n \"X-WR-TIMEZONE:Europe/Berlin\",\n \"REFRESH-INTERVAL;VALUE=DURATION:PT15M\",\n \"X-PUBLISHED-TTL:PT15M\",\n ].join(\"\\r\\n\");\n\n const vevents = events.map((e) =>\n [\n \"BEGIN:VEVENT\",\n fold(`UID:${e.uid}`),\n `DTSTAMP:${now}`,\n `DTSTART:${icsDate(e.start)}`,\n `DTEND:${icsDate(e.end)}`,\n fold(`SUMMARY:${esc(e.summary)}`),\n fold(`DESCRIPTION:${esc(e.description)}`),\n fold(`CATEGORIES:S-Bahn,Störung,${e.lines.join(\",\")}`),\n \"URL:https://sbahn.berlin/fahren/bauen-stoerung/\",\n \"END:VEVENT\",\n ].join(\"\\r\\n\")\n );\n\n // Placeholder if no disruptions found\n if (events.length === 0) {\n const start = new Date();\n const end = new Date(start.getTime() + 3600 * 1000);\n vevents.push(\n [\n \"BEGIN:VEVENT\",\n `UID:sbahn-clear-${now}@vbb`,\n `DTSTAMP:${now}`,\n `DTSTART:${icsDate(start)}`,\n `DTEND:${icsDate(end)}`,\n \"SUMMARY:✅ Keine aktuellen Störungen (S8·S85·S9·S45-47)\",\n \"DESCRIPTION:Keine gemeldeten Störungen für Ihre Linien.\",\n \"URL:https://sbahn.berlin/fahren/bauen-stoerung/\",\n \"END:VEVENT\",\n ].join(\"\\r\\n\"),\n );\n }\n\n return [header, ...vevents, \"END:VCALENDAR\"].join(\"\\r\\n\");\n}\n\n// ── HTTP handler ──────────────────────────────────────────────────────────────\n\nexport default async function handler(_req: Request): Promise {\n try {\n const disruptions = await fetchAllDisruptions();\n const ics = buildICS(disruptions);\n\n return new Response(ics, {\n status: 200,\n headers: {\n \"Content-Type\": \"text/calendar; charset=utf-8\",\n \"Content-Disposition\": 'inline; filename=\"sbahn-stoerungen.ics\"',\n \"Cache-Control\": \"public, max-age=900\",\n \"Access-Control-Allow-Origin\": \"*\",\n },\n });\n } catch (err) {\n return new Response(`Error: ${err}`, { status: 500 });\n }\n}","deleted","label",[100],"permalink","https://www.val.town/x/aynetdia/Ersatzverkehr/code/main.ts","extension","actionData","errors"]