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default async function (req: Request): Promise {\n if (req.method === \"OPTIONS\") {\n return new Response(null, {\n headers: {\n \"Access-Control-Allow-Origin\": \"*\",\n \"Access-Control-Allow-Methods\": \"GET, POST, OPTIONS\",\n \"Access-Control-Allow-Headers\": \"Content-Type\",\n },\n });\n }\n\n let start_date: string | null = null;\n let end_date: string | null = null;\n let caller_timezone: string | null = null;\n\n if (req.method === \"POST\") {\n try {\n const body = await req.json();\n start_date = body.start_date || body.date;\n end_date = body.end_date || null;\n caller_timezone = body.timezone || null;\n } catch {\n return Response.json({ error: \"Invalid JSON body\" }, { status: 400 });\n }\n } else {\n const url = new URL(req.url);\n start_date = url.searchParams.get(\"start_date\") ||\n url.searchParams.get(\"date\");\n end_date = url.searchParams.get(\"end_date\");\n caller_timezone = url.searchParams.get(\"timezone\");\n }\n\n if (!start_date || !/^\\d{4}-\\d{2}-\\d{2}$/.test(start_date)) {\n return Response.json({\n error: \"Provide 'start_date' in YYYY-MM-DD format.\",\n }, { status: 400 });\n }\n\n if (end_date && !/^\\d{4}-\\d{2}-\\d{2}$/.test(end_date)) {\n return Response.json(\n { error: \"'end_date' must be in YYYY-MM-DD format.\" },\n { status: 400 },\n );\n }\n\n const BUSINESS_START = 9;\n const BUSINESS_END = 17;\n const SLOT_DURATION = 30;\n const BUSINESS_TZ = \"America/Los_Angeles\";\n const callerTz = caller_timezone || BUSINESS_TZ;\n\n if (!end_date) {\n end_date = addBusinessDays(start_date, 4);\n }\n\n try {\n const accessToken = await getAccessToken();\n const calendarId = Deno.env.get(\"GOOGLE_CALENDAR_ID\")!;\n\n const pacificOffset = getTimezoneOffsetString(start_date, BUSINESS_TZ);\n\n const params = new URLSearchParams({\n timeMin: `${start_date}T00:00:00${pacificOffset}`,\n timeMax: `${end_date}T23:59:59${pacificOffset}`,\n timeZone: BUSINESS_TZ,\n singleEvents: \"true\",\n orderBy: \"startTime\",\n maxResults: \"250\",\n });\n\n const url = `https://www.googleapis.com/calendar/v3/calendars/${\n encodeURIComponent(calendarId)\n }/events?${params.toString()}`;\n\n const res = await fetch(url, {\n headers: { Authorization: `Bearer ${accessToken}` },\n });\n\n if (!res.ok) {\n const err = await res.text();\n return Response.json(\n { error: \"Failed to query calendar\", details: err },\n { status: 502 },\n );\n }\n\n const data = await res.json();\n const events = data.items || [];\n\n // Bucket events by date\n const eventsByDate: Record = {};\n\n for (const event of events) {\n if (event.transparency === \"transparent\") continue;\n\n if (event.start?.date && !event.start?.dateTime) {\n const eventDate = event.start.date;\n if (!eventsByDate[eventDate]) eventsByDate[eventDate] = [];\n eventsByDate[eventDate].push({ start: 0, end: 24 * 60 });\n continue;\n }\n\n if (!event.start?.dateTime || !event.end?.dateTime) continue;\n\n const dateMatch = event.start.dateTime.match(/^(\\d{4}-\\d{2}-\\d{2})/);\n const startMatch = event.start.dateTime.match(/T(\\d{2}):(\\d{2})/);\n const endMatch = event.end.dateTime.match(/T(\\d{2}):(\\d{2})/);\n\n if (!dateMatch || !startMatch || !endMatch) continue;\n\n const eventDate = dateMatch[1];\n const startMin = parseInt(startMatch[1]) * 60 + parseInt(startMatch[2]);\n const endMin = parseInt(endMatch[1]) * 60 + parseInt(endMatch[2]);\n\n if (!eventsByDate[eventDate]) eventsByDate[eventDate] = [];\n eventsByDate[eventDate].push({ start: startMin, end: endMin });\n }\n\n // Generate slots for each day\n const dayNames = [\n \"Sunday\",\n \"Monday\",\n \"Tuesday\",\n \"Wednesday\",\n \"Thursday\",\n \"Friday\",\n \"Saturday\",\n ];\n const monthNames = [\n \"January\",\n \"February\",\n \"March\",\n \"April\",\n \"May\",\n \"June\",\n \"July\",\n \"August\",\n \"September\",\n \"October\",\n \"November\",\n \"December\",\n ];\n const results: any[] = [];\n let currentDate = start_date;\n\n while (currentDate <= end_date) {\n const dateObj = new Date(currentDate + \"T12:00:00Z\");\n const dayOfWeek = dateObj.getUTCDay();\n\n if (dayOfWeek !== 0 && dayOfWeek !== 6) {\n const busyPeriods = eventsByDate[currentDate] || [];\n const slots: any[] = [];\n\n for (\n let m = BUSINESS_START * 60;\n m + SLOT_DURATION <= BUSINESS_END * 60;\n m += SLOT_DURATION\n ) {\n const slotEnd = m + SLOT_DURATION;\n\n const isBusy = busyPeriods.some(\n (busy) => m < busy.end && slotEnd > busy.start,\n );\n\n if (!isBusy) {\n const h24 = Math.floor(m / 60);\n const min = m % 60;\n\n // Build slot_id: date_HHMM in Pacific (machine-readable, never shown to caller)\n const slot_id = `${currentDate}_${String(h24).padStart(2, \"0\")}${\n String(min).padStart(2, \"0\")\n }`;\n\n // Build display time in Pacific\n const pacificDisplay = to12Hour(h24, min);\n\n // Build display string\n const monthDay = `${\n monthNames[dateObj.getUTCMonth()]\n } ${dateObj.getUTCDate()}`;\n let display = `${\n dayNames[dayOfWeek]\n } ${monthDay} - ${pacificDisplay} Pacific`;\n\n // If caller is in a different timezone, show their local time too\n const slot: any = { slot_id, display };\n\n if (callerTz !== BUSINESS_TZ) {\n const converted = convertTime(\n currentDate,\n `${String(h24).padStart(2, \"0\")}:${\n String(min).padStart(2, \"0\")\n }`,\n BUSINESS_TZ,\n callerTz,\n );\n const [cH, cM] = converted.time.split(\":\").map(Number);\n const callerDisplay = to12Hour(cH, cM);\n const tzShort = getShortTzName(callerTz);\n display = `${\n dayNames[dayOfWeek]\n } ${monthDay} - ${callerDisplay} ${tzShort} (${pacificDisplay} Pacific)`;\n slot.display = display;\n slot.caller_time = callerDisplay;\n slot.caller_timezone = callerTz;\n }\n\n slot.pacific_time = pacificDisplay;\n slots.push(slot);\n }\n }\n\n if (slots.length > 0) {\n results.push({\n date: currentDate,\n day: dayNames[dayOfWeek],\n slots_available: slots.length,\n slots,\n });\n }\n }\n\n const d = new Date(currentDate + \"T12:00:00Z\");\n d.setUTCDate(d.getUTCDate() + 1);\n currentDate = d.toISOString().split(\"T\")[0];\n }\n\n const totalSlots = results.reduce(\n (sum, day) => sum + day.slots_available,\n 0,\n );\n\n return Response.json({\n start_date,\n end_date,\n business_timezone: BUSINESS_TZ,\n caller_timezone: callerTz,\n business_hours: \"9:00 AM - 5:00 PM Pacific\",\n total_slots_available: totalSlots,\n days_with_availability: results.length,\n days: results,\n message: totalSlots > 0\n ? `Found ${totalSlots} available slots across ${results.length} days from ${start_date} to ${end_date}.`\n : `No availability found from ${start_date} to ${end_date}.`,\n });\n } catch (err: any) {\n return Response.json({ error: \"Internal error\", details: err.message }, {\n status: 500,\n });\n }\n}\n\n// ── Helpers ──\n\nfunction to12Hour(h: number, m: number): string {\n const period = h >= 12 ? \"PM\" : \"AM\";\n const hour12 = h === 0 ? 12 : h > 12 ? h - 12 : h;\n return m === 0\n ? `${hour12}:00 ${period}`\n : `${hour12}:${String(m).padStart(2, \"0\")} ${period}`;\n}\n\nfunction getShortTzName(tz: string): string {\n const map: Record = {\n \"America/New_York\": \"Eastern\",\n \"America/Chicago\": \"Central\",\n \"America/Denver\": \"Mountain\",\n \"America/Los_Angeles\": \"Pacific\",\n \"America/Phoenix\": \"Arizona\",\n \"Pacific/Honolulu\": \"Hawaii\",\n \"America/Anchorage\": \"Alaska\",\n };\n return map[tz] || tz;\n}\n\nfunction getTimezoneOffsetMinutes(dateStr: string, tz: string): number {\n const utc = new Date(`${dateStr}T12:00:00Z`);\n const parts = new Intl.DateTimeFormat(\"en-US\", {\n timeZone: tz,\n hour: \"numeric\",\n minute: \"numeric\",\n hour12: false,\n }).formatToParts(utc);\n\n const hour = parseInt(parts.find((p) => p.type === \"hour\")?.value || \"0\");\n const minute = parseInt(parts.find((p) => p.type === \"minute\")?.value || \"0\");\n return (hour * 60 + minute) - (12 * 60);\n}\n\nfunction getTimezoneOffsetString(dateStr: string, tz: string): string {\n const offsetMin = getTimezoneOffsetMinutes(dateStr, tz);\n const sign = offsetMin >= 0 ? \"+\" : \"-\";\n const abs = Math.abs(offsetMin);\n return `${sign}${String(Math.floor(abs / 60)).padStart(2, \"0\")}:${\n String(abs % 60).padStart(2, \"0\")\n }`;\n}\n\nfunction convertTime(\n dateStr: string,\n timeStr: string,\n fromTz: string,\n toTz: string,\n): { date: string; time: string } {\n if (fromTz === toTz) return { date: dateStr, time: timeStr };\n\n const fromOffset = getTimezoneOffsetMinutes(dateStr, fromTz);\n const toOffset = getTimezoneOffsetMinutes(dateStr, toTz);\n\n const [h, m] = timeStr.split(\":\").map(Number);\n let totalMinutes = h * 60 + m - fromOffset + toOffset;\n\n let dayShift = 0;\n if (totalMinutes < 0) {\n dayShift = -1;\n totalMinutes += 24 * 60;\n } else if (totalMinutes >= 24 * 60) {\n dayShift = 1;\n totalMinutes -= 24 * 60;\n }\n\n let newDate = dateStr;\n if (dayShift !== 0) {\n const d = new Date(`${dateStr}T12:00:00Z`);\n d.setUTCDate(d.getUTCDate() + dayShift);\n newDate = d.toISOString().split(\"T\")[0];\n }\n\n return {\n date: newDate,\n time: `${String(Math.floor(totalMinutes / 60)).padStart(2, \"0\")}:${\n String(totalMinutes % 60).padStart(2, \"0\")\n }`,\n };\n}\n\nfunction addBusinessDays(startDate: string, days: number): string {\n const d = new Date(startDate + \"T12:00:00Z\");\n let added = 0;\n while (added < days) {\n d.setUTCDate(d.getUTCDate() + 1);\n if (d.getUTCDay() !== 0 && d.getUTCDay() !== 6) added++;\n }\n return d.toISOString().split(\"T\")[0];\n}\n\n// ── Google Auth ──\n\nasync function getAccessToken(): Promise {\n const clientEmail = Deno.env.get(\"GOOGLE_CLIENT_EMAIL\")!;\n const privateKeyPem = Deno.env.get(\"GOOGLE_PRIVATE_KEY\")!.replace(\n /\\\\n/g,\n \"\\n\",\n );\n const scope = \"https://www.googleapis.com/auth/calendar\";\n const now = Math.floor(Date.now() / 1000);\n\n const header = { alg: \"RS256\", typ: \"JWT\" };\n const claim = {\n iss: clientEmail,\n scope,\n aud: \"https://oauth2.googleapis.com/token\",\n iat: now,\n exp: now + 3600,\n };\n\n const toBase64Url = (data: string) =>\n btoa(data).replace(/\\+/g, \"-\").replace(/\\//g, \"_\").replace(/=+$/, \"\");\n const headerB64 = toBase64Url(JSON.stringify(header));\n const claimB64 = toBase64Url(JSON.stringify(claim));\n const unsignedToken = `${headerB64}.${claimB64}`;\n\n const pemBody = privateKeyPem.replace(\"-----BEGIN PRIVATE KEY-----\", \"\")\n .replace(\"-----END PRIVATE KEY-----\", \"\").replace(/\\s/g, \"\");\n const binaryString = atob(pemBody);\n const keyBuffer = new Uint8Array(binaryString.length);\n for (let i = 0; i < binaryString.length; i++) {\n keyBuffer[i] = binaryString.charCodeAt(i);\n }\n\n const cryptoKey = await crypto.subtle.importKey(\n \"pkcs8\",\n keyBuffer,\n { name: \"RSASSA-PKCS1-v1_5\", hash: \"SHA-256\" },\n false,\n [\"sign\"],\n );\n const encoder = new TextEncoder();\n const signatureBuffer = await crypto.subtle.sign(\n \"RSASSA-PKCS1-v1_5\",\n cryptoKey,\n encoder.encode(unsignedToken),\n );\n\n const sigBytes = new Uint8Array(signatureBuffer);\n let sigString = \"\";\n for (let i = 0; i < sigBytes.length; i++) {\n sigString += String.fromCharCode(sigBytes[i]);\n }\n const signatureB64 = toBase64Url(sigString);\n\n const jwt = `${unsignedToken}.${signatureB64}`;\n const tokenRes = await fetch(\"https://oauth2.googleapis.com/token\", {\n method: \"POST\",\n headers: { \"Content-Type\": \"application/x-www-form-urlencoded\" },\n body:\n `grant_type=urn:ietf:params:oauth:grant-type:jwt-bearer&assertion=${jwt}`,\n });\n const tokenData = await tokenRes.json();\n if (!tokenData.access_token) {\n throw new Error(`Token exchange failed: ${JSON.stringify(tokenData)}`);\n }\n return tokenData.access_token;\n}","deleted","label",[178,159],"FreedomSoft-google","permalink","https://www.val.town/x/adhamvapi/FreedomSoft/code/FreedomSoft-google/getAvailableSlots.ts","extension","actionData","errors"]