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Go to your val in the Val Town UI\n * 2. Check the cron schedule in the top right corner\n * 3. Set to: 10 * * * * (if not already set)\n *\n * Or use the helper script to set it programmatically:\n * bun run set-schedule\n *\n * Environment Variables Required:\n * - SLACK_WEBHOOK_URL: Your Slack webhook URL\n * - NEAR_SIDE_DAYS: Days for near side cleaning (e.g., \"Mon,Thu\")\n * - FAR_SIDE_DAYS: Days for far side cleaning (e.g., \"Tue,Fri\")\n *\n * Optional Environment Variables:\n * - CLEANING_START_TIME: Start time for cleaning (default: \"09:00\")\n * - CLEANING_END_TIME: End time for cleaning (default: \"10:30\")\n * - NEAR_SIDE_EMOJI: Emoji for near side (default: \"🏡\")\n * - FAR_SIDE_EMOJI: Emoji for far side (default: \"🌳\")\n */\n\n// ============================================================================\n// EXTERNAL DEPENDENCIES\n// ============================================================================\n\nimport { addDays, startOfWeek, endOfWeek, format, isSameDay } from 'npm:date-fns@3.0.0'\nimport { formatInTimeZone, toZonedTime } from 'npm:date-fns-tz@3.0.0'\nimport ICAL from 'npm:ical.js@2.0.0'\nimport { parseHTML } from 'npm:linkedom@0.18.0'\n\n// ============================================================================\n// APPLICATION CODE\n// ============================================================================\n\n/**\n * Configuration loaded from environment variables\n */\ninterface Config {\n // Slack settings\n slackWebhookUrl: string;\n\n // Street cleaning schedule\n nearSideDays: DayOfWeek[];\n farSideDays: DayOfWeek[];\n cleaningStartTime: string; // \"HH:mm\" format\n cleaningEndTime: string; // \"HH:mm\" format\n\n // Display preferences\n nearSideEmoji: string;\n farSideEmoji: string;\n\n // Scheduling (cron expressions)\n weeklySummaryTime: string;\n dailyReminderTime: string;\n emergencyCheckTime: string;\n}\n\ntype DayOfWeek = 'Mon' | 'Tue' | 'Wed' | 'Thu' | 'Fri' | 'Sat' | 'Sun';\n\ntype Side = 'near' | 'far';\n\n/**\n * Represents a single day's parking status\n */\ninterface DayStatus {\n date: Date;\n dayOfWeek: DayOfWeek;\n hasNearSideCleaning: boolean;\n hasFarSideCleaning: boolean;\n isSuspended: boolean;\n suspensionReason?: string;\n /** Which side the car should be parked on this day */\n parkOnSide: Side | null;\n}\n\n/**\n * A week's worth of parking data (Mon-Fri)\n */\ninterface WeekView {\n startDate: Date; // Monday\n endDate: Date; // Friday\n days: DayStatus[];\n}\n\n/**\n * Decision about whether to send a move reminder\n */\ninterface MoveDecision {\n shouldMove: boolean;\n currentSide?: Side;\n targetSide?: Side;\n nextMoveDate?: Date;\n}\n\n/**\n * Result from scraping NYC DOT website\n */\ninterface ScrapeResult {\n isSuspendedToday: boolean;\n reason?: string;\n scrapedAt: Date;\n}\n\n/**\n * Cached ICS calendar data\n */\ninterface CalendarCache {\n icsContent: string;\n suspensionDates: string[]; // ISO date strings\n fetchedAt: Date;\n}\n\nconst NYC_TIMEZONE = 'America/New_York';\n\n/**\n * Get current date/time in NYC timezone\n */\nfunction getNycNow(): Date {\n return toZonedTime(new Date(), NYC_TIMEZONE);\n}\n\n/**\n * Format date in NYC timezone\n */\nfunction formatNycDate(date: Date, formatStr: string): string {\n return formatInTimeZone(date, NYC_TIMEZONE, formatStr);\n}\n\n/**\n * Convert day of week number (0=Sun, 1=Mon, ...) to our DayOfWeek type\n * Extracts day in NYC timezone to avoid wrong day near midnight UTC\n */\nfunction getDayOfWeek(date: Date): DayOfWeek {\n const dayMap: DayOfWeek[] = ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat'];\n // Use formatInTimeZone to get day index in NYC timezone (0-6, where 0=Sunday)\n const dayIndex = parseInt(formatInTimeZone(date, NYC_TIMEZONE, 'i'), 10);\n return dayMap[dayIndex % 7]; // % 7 maps Sunday (7) back to 0\n}\n\n/**\n * Get the Monday of the current week (for week view)\n * Returns a Date object representing Monday at noon in NYC timezone\n * (using noon to avoid any timezone edge cases)\n *\n * For Saturday and Sunday: Returns the NEXT Monday (forward-looking)\n * For Mon-Fri: Returns the current week's Monday\n */\nfunction getThisMonday(now: Date = getNycNow()): Date {\n // Get day of week in NYC timezone (0=Sun, 1=Mon, etc.)\n const dayIndex = parseInt(formatInTimeZone(now, NYC_TIMEZONE, 'i'), 10);\n const dayOfWeek = dayIndex % 7;\n\n let daysToAdd: number;\n\n if (dayOfWeek === 0) {\n // Sunday: go forward 1 day to next Monday\n daysToAdd = 1;\n } else if (dayOfWeek === 6) {\n // Saturday: go forward 2 days to next Monday\n daysToAdd = 2;\n } else {\n // Mon-Fri: go back to this week's Monday\n // dayOfWeek 1=Mon (go back 0), 2=Tue (go back 1), etc.\n daysToAdd = -(dayOfWeek - 1);\n }\n\n // Use addDays for timezone-safe date arithmetic, then create Monday at noon NYC time\n const monday = addDays(now, daysToAdd);\n\n // Parse the date in NYC timezone and create a new Date at noon NYC time\n const mondayStr = formatInTimeZone(monday, NYC_TIMEZONE, 'yyyy-MM-dd');\n return new Date(`${mondayStr}T12:00:00${getCurrentNycOffset()}`);\n}\n\n/**\n * Get current NYC timezone offset string (e.g., \"-04:00\" for EDT, \"-05:00\" for EST)\n */\nfunction getCurrentNycOffset(): string {\n const now = new Date();\n const nycTime = formatInTimeZone(now, NYC_TIMEZONE, 'xxx'); // Returns like \"-04:00\"\n return nycTime;\n}\n\n/**\n * Get the Friday of the current week\n */\nfunction getThisFriday(now: Date = getNycNow()): Date {\n const monday = getThisMonday(now);\n // Use addDays for timezone-safe arithmetic\n return addDays(monday, 4);\n}\n\n/**\n * Generate array of dates for Mon-Fri of current week\n */\nfunction getWeekdays(now: Date = getNycNow()): Date[] {\n const monday = getThisMonday(now);\n // Use addDays for timezone-safe arithmetic\n return [0, 1, 2, 3, 4].map(offset => addDays(monday, offset));\n}\n\n/**\n * Convert Date to ISO date string (YYYY-MM-DD) for comparison\n */\nfunction toIsoDateString(date: Date): string {\n return format(date, 'yyyy-MM-dd');\n}\n\n/**\n * Check if two dates are the same day (ignoring time)\n */\nfunction isSameDayNyc(date1: Date, date2: Date): boolean {\n return isSameDay(\n toZonedTime(date1, NYC_TIMEZONE),\n toZonedTime(date2, NYC_TIMEZONE)\n );\n}\n\n/**\n * Get next weekday with specific day name (e.g., next Monday)\n * Returns null if dayName is weekend\n */\nfunction getNextWeekday(startDate: Date, targetDayName: DayOfWeek): Date | null {\n const dayNames: DayOfWeek[] = ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat'];\n const targetDayIndex = dayNames.indexOf(targetDayName);\n\n if (targetDayIndex === 0 || targetDayIndex === 6) {\n return null; // Weekend\n }\n\n let checkDate = addDays(startDate, 1);\n // Use getDayOfWeek which now properly extracts NYC timezone day\n while (getDayOfWeek(checkDate) !== targetDayName) {\n checkDate = addDays(checkDate, 1);\n // Safety: don't loop forever\n if (checkDate > addDays(startDate, 14)) return null;\n }\n\n return checkDate;\n}\n\ninterface RetryOptions {\n maxAttempts?: number;\n initialDelayMs?: number;\n maxDelayMs?: number;\n backoffMultiplier?: number;\n}\n\nconst DEFAULT_OPTIONS: Required = {\n maxAttempts: 3,\n initialDelayMs: 1000,\n maxDelayMs: 10000,\n backoffMultiplier: 2,\n};\n\n/**\n * Retry an async operation with exponential backoff\n */\nasync function retry(\n operation: () => Promise,\n options: RetryOptions = {}\n): Promise {\n const opts = { ...DEFAULT_OPTIONS, ...options };\n let lastError: Error | unknown;\n let delay = opts.initialDelayMs;\n\n for (let attempt = 1; attempt <= opts.maxAttempts; attempt++) {\n try {\n return await operation();\n } catch (error) {\n lastError = error;\n\n if (attempt === opts.maxAttempts) {\n break; // Don't sleep after final attempt\n }\n\n console.warn(\n `Attempt ${attempt}/${opts.maxAttempts} failed. Retrying in ${delay}ms...`,\n error\n );\n\n await sleep(delay);\n delay = Math.min(delay * opts.backoffMultiplier, opts.maxDelayMs);\n }\n }\n\n throw new Error(\n `Operation failed after ${opts.maxAttempts} attempts. Last error: ${lastError}`\n );\n}\n\nfunction sleep(ms: number): Promise {\n return new Promise(resolve => setTimeout(resolve, ms));\n}\n\nconst ICS_URL_TEMPLATE = 'https://www.nyc.gov/html/dot/downloads/misc/{year}-alternate-side.ics';\nconst CACHE_KEY = 'nyc-asp-calendar-cache';\n\n// In Val Town, use @std/blob for storage. For local dev, use in-memory cache.\nlet memoryCache: CalendarCache | null = null;\nlet valBlobCache: any = undefined; // undefined = not checked, null = not available, object = available\n\n/**\n * Get Val Town blob storage if available\n * In Val Town environment, this will import the blob module\n * In local dev, returns null and we'll use in-memory cache\n */\nasync function getValBlob() {\n // Return cached result if we've already checked\n if (valBlobCache !== undefined) {\n return valBlobCache;\n }\n\n try {\n // @ts-ignore - Val Town specific import\n const blobModule = await import('https://esm.town/v/std/blob');\n valBlobCache = blobModule.blob;\n return valBlobCache;\n } catch {\n // Val Town blob not available (expected in local dev)\n valBlobCache = null;\n return null;\n }\n}\n\n/**\n * Fetch the ICS calendar file for a given year\n */\nasync function fetchIcsFile(year: number): Promise {\n const url = ICS_URL_TEMPLATE.replace('{year}', year.toString());\n\n const response = await retry(\n async () => {\n const res = await fetch(url);\n if (!res.ok) {\n throw new Error(`Failed to fetch ICS: ${res.status} ${res.statusText}`);\n }\n return res;\n },\n { maxAttempts: 3, initialDelayMs: 1000 }\n );\n\n return await response.text();\n}\n\n/**\n * Get ICS content, using cache if available and fresh\n */\nasync function getIcsContent(\n forceRefresh: boolean = false\n): Promise {\n // Get current year in NYC timezone to handle New Year's Eve edge case\n const currentYear = parseInt(formatNycDate(getNycNow(), 'yyyy'), 10);\n\n // Check cache first (unless forcing refresh)\n if (!forceRefresh) {\n const cached = await getCachedCalendar();\n if (cached && cached.icsContent && isCacheFresh(cached)) {\n console.log('Using cached ICS calendar');\n return cached.icsContent;\n }\n }\n\n // Fetch fresh data\n console.log('Fetching fresh ICS calendar');\n const icsContent = await fetchIcsFile(currentYear);\n\n // Update cache\n await setCachedCalendar({ icsContent, fetchedAt: new Date() });\n\n return icsContent;\n}\n\n/**\n * Check if cached data is still fresh (less than 7 days old)\n */\nfunction isCacheFresh(cache: Partial): boolean {\n if (!cache.fetchedAt) return false;\n\n const age = Date.now() - new Date(cache.fetchedAt).getTime();\n const sevenDays = 7 * 24 * 60 * 60 * 1000;\n\n return age < sevenDays;\n}\n\n/**\n * Get cached calendar from storage\n */\nasync function getCachedCalendar(): Promise | null> {\n const blob = await getValBlob();\n\n if (blob) {\n // Val Town blob storage\n try {\n const cached = await blob.getJSON(CACHE_KEY);\n return cached || null;\n } catch {\n return null;\n }\n }\n\n // In-memory cache for local dev\n return memoryCache;\n}\n\n/**\n * Save calendar to cache\n */\nasync function setCachedCalendar(\n cache: Partial\n): Promise {\n const blob = await getValBlob();\n\n if (blob) {\n // Val Town blob storage\n await blob.setJSON(CACHE_KEY, cache);\n } else {\n // In-memory cache for local dev\n memoryCache = cache as CalendarCache;\n }\n}\n\n/**\n * Parse ICS content and extract suspension dates\n * Returns array of ISO date strings (YYYY-MM-DD)\n */\nfunction parseIcsSuspensions(icsContent: string): string[] {\n try {\n const jcalData = ICAL.parse(icsContent);\n const comp = new ICAL.Component(jcalData);\n const vevents = comp.getAllSubcomponents('vevent');\n\n const suspensionDates: Set = new Set();\n\n for (const vevent of vevents) {\n const event = new ICAL.Event(vevent);\n const summary = event.summary.toLowerCase();\n\n // Check if event indicates ASP suspension\n if (isSuspensionEvent(summary)) {\n const startDate = event.startDate.toJSDate();\n suspensionDates.add(toIsoDateString(startDate));\n }\n }\n\n return Array.from(suspensionDates).sort();\n } catch (error) {\n console.error('Failed to parse ICS:', error);\n throw new Error(`ICS parsing failed: ${error}`);\n }\n}\n\n/**\n * Determine if event summary indicates ASP is suspended\n */\nfunction isSuspensionEvent(summary: string): boolean {\n const suspensionKeywords = [\n 'asp suspended',\n 'alternate side parking suspended',\n 'no asp',\n 'suspended',\n ];\n\n return suspensionKeywords.some(keyword => summary.includes(keyword));\n}\n\n/**\n * Check if a specific date is suspended according to ICS data\n */\nfunction isSuspendedByIcs(\n date: Date,\n suspensionDates: string[]\n): boolean {\n const dateStr = toIsoDateString(date);\n return suspensionDates.includes(dateStr);\n}\n\nconst NYC_ASP_URL = 'https://www.nyc.gov/html/dot/html/motorist/alternate-side-parking.shtml';\n\n/**\n * Scrape NYC DOT website to check if ASP is suspended today\n */\nasync function scrapeNycWebsite(): Promise {\n const html = await retry(\n async () => {\n const res = await fetch(NYC_ASP_URL);\n if (!res.ok) {\n throw new Error(`Failed to fetch NYC website: ${res.status}`);\n }\n return await res.text();\n },\n { maxAttempts: 3, initialDelayMs: 1000 }\n );\n\n return parseHtmlForSuspension(html);\n}\n\n/**\n * Parse HTML to detect suspension status\n */\nfunction parseHtmlForSuspension(html: string): ScrapeResult {\n const { document } = parseHTML(html);\n\n // Look for common suspension indicators\n const bodyText = document.body.textContent?.toLowerCase() || '';\n\n const suspensionPhrases = [\n 'asp is suspended',\n 'alternate side parking is suspended',\n 'parking rules are suspended',\n 'asp suspended today',\n 'not in effect today',\n 'suspended due to',\n ];\n\n for (const phrase of suspensionPhrases) {\n if (bodyText.includes(phrase)) {\n // Try to extract reason\n const reason = extractSuspensionReason(bodyText, phrase);\n\n return {\n isSuspendedToday: true,\n reason,\n scrapedAt: getNycNow(),\n };\n }\n }\n\n return {\n isSuspendedToday: false,\n scrapedAt: getNycNow(),\n };\n}\n\n/**\n * Attempt to extract the reason for suspension from text\n */\nfunction extractSuspensionReason(text: string, foundPhrase: string): string | undefined {\n const reasonKeywords = ['snow', 'weather', 'emergency', 'holiday'];\n\n for (const keyword of reasonKeywords) {\n if (text.includes(keyword)) {\n return keyword;\n }\n }\n\n // Default reason\n return 'emergency';\n}\n\nlet cachedSuspensionDates: string[] = [];\nlet lastIcsFetch: Date | null = null;\n\n/**\n * Initialize suspension data (fetch ICS on first call or weekly)\n */\nasync function ensureSuspensionDataLoaded(): Promise {\n const now = getNycNow();\n const needsRefresh = !lastIcsFetch ||\n (now.getTime() - lastIcsFetch.getTime()) > 7 * 24 * 60 * 60 * 1000;\n\n if (needsRefresh) {\n const icsContent = await getIcsContent(false);\n cachedSuspensionDates = parseIcsSuspensions(icsContent);\n lastIcsFetch = now;\n }\n}\n\n/**\n * Check if a specific date has ASP suspended\n * Combines ICS calendar data + website scraping for today\n */\nasync function isSuspended(\n date: Date\n): Promise<{ suspended: boolean; reason?: string }> {\n await ensureSuspensionDataLoaded();\n\n // Check ICS calendar first\n if (isSuspendedByIcs(date, cachedSuspensionDates)) {\n return { suspended: true, reason: 'holiday' };\n }\n\n // For today only, check website for emergency suspensions\n const today = getNycNow();\n if (isSameDayNyc(date, today)) {\n try {\n const scrapeResult = await scrapeNycWebsite();\n if (scrapeResult.isSuspendedToday) {\n return {\n suspended: true,\n reason: scrapeResult.reason || 'emergency'\n };\n }\n } catch (error) {\n console.error('Failed to scrape website, using ICS data only:', error);\n // Fall through to return ICS result\n }\n }\n\n return { suspended: false };\n}\n\n/**\n * Get all suspension dates from ICS (for week view)\n */\nasync function getSuspensionDates(): Promise {\n await ensureSuspensionDataLoaded();\n return cachedSuspensionDates;\n}\n\n/**\n * Reset cache (for testing purposes)\n */\nfunction resetCache(): void {\n cachedSuspensionDates = [];\n lastIcsFetch = null;\n}\n\n/**\n * Build week view with parking status for each day\n */\nasync function buildWeekView(\n config: Config,\n referenceDate?: Date\n): Promise {\n const weekdays = getWeekdays(referenceDate);\n const days: DayStatus[] = [];\n\n for (const date of weekdays) {\n const dayOfWeek = getDayOfWeek(date);\n\n // Check if this day has street cleaning on each side\n const hasNearSideCleaning = config.nearSideDays.includes(dayOfWeek);\n const hasFarSideCleaning = config.farSideDays.includes(dayOfWeek);\n\n // Check if suspended\n const { suspended, reason } = await isSuspended(date);\n\n // Determine where car should be parked\n const parkOnSide = determineParkingSide(\n hasNearSideCleaning,\n hasFarSideCleaning,\n suspended\n );\n\n days.push({\n date,\n dayOfWeek,\n hasNearSideCleaning,\n hasFarSideCleaning,\n isSuspended: suspended,\n suspensionReason: reason,\n parkOnSide,\n });\n }\n\n return {\n startDate: getThisMonday(referenceDate),\n endDate: getThisFriday(referenceDate),\n days,\n };\n}\n\n/**\n * Determine which side to park on based on cleaning schedule\n *\n * Logic: Park on the side that does NOT have cleaning today\n * If suspended: Stay on the side that protects you for the next cleaning day\n */\nfunction determineParkingSide(\n hasNearSideCleaning: boolean,\n hasFarSideCleaning: boolean,\n isSuspended: boolean\n): Side | null {\n // If suspended, we need context of the week to decide\n // For now, return null for suspended days (will be filled in by week-level logic)\n if (isSuspended) {\n return null;\n }\n\n // Park on opposite side of cleaning\n if (hasNearSideCleaning) return 'far';\n if (hasFarSideCleaning) return 'near';\n\n // No cleaning today (e.g., Wednesday)\n return null;\n}\n\n/**\n * Fill in parking sides for suspended/no-cleaning days\n * Strategy: Stay on current side to prepare for next cleaning day\n */\nfunction optimizeParkingSides(weekView: WeekView): WeekView {\n const days = [...weekView.days];\n\n for (let i = 0; i < days.length; i++) {\n if (days[i].parkOnSide !== null) continue;\n\n // Find next day with cleaning\n const nextCleaningDay = findNextDayWithCleaning(days, i);\n\n if (nextCleaningDay) {\n // Park on the side needed for next cleaning\n days[i].parkOnSide = nextCleaningDay.parkOnSide;\n } else {\n // No more cleaning this week, stay on current side\n // Look back to find current side\n const prevDay = findPreviousDay(days, i);\n days[i].parkOnSide = prevDay?.parkOnSide || 'far';\n }\n }\n\n return { ...weekView, days };\n}\n\nfunction findNextDayWithCleaning(days: DayStatus[], startIndex: number): DayStatus | null {\n for (let i = startIndex + 1; i < days.length; i++) {\n if (days[i].parkOnSide !== null) {\n return days[i];\n }\n }\n return null;\n}\n\nfunction findPreviousDay(days: DayStatus[], startIndex: number): DayStatus | null {\n for (let i = startIndex - 1; i >= 0; i--) {\n if (days[i].parkOnSide !== null) {\n return days[i];\n }\n }\n return null;\n}\n\n/**\n * Determine if a move reminder should be sent today at 10 AM\n *\n * Logic:\n * 1. Is today a cleaning day (not suspended)?\n * 2. Where is the car now? (opposite of today's cleaning)\n * 3. What's the next cleaning day?\n * 4. Do we need to switch sides?\n * 5. Is it Friday? (skip - weekend coming)\n */\nfunction shouldSendMoveReminder(\n weekView: WeekView,\n config: Config\n): MoveDecision {\n const today = getNycNow();\n const todayDow = getDayOfWeek(today);\n\n const todayStatus = weekView.days.find(d => isSameDayNyc(d.date, today));\n\n if (!todayStatus) {\n return { shouldMove: false };\n }\n\n // Not a cleaning day? No move needed\n if (!todayStatus.hasNearSideCleaning && !todayStatus.hasFarSideCleaning) {\n return { shouldMove: false };\n }\n\n // Suspended today? No move needed\n if (todayStatus.isSuspended) {\n return { shouldMove: false };\n }\n\n // Is it Friday? Skip (weekend coming)\n if (todayStatus.dayOfWeek === 'Fri') {\n return { shouldMove: false };\n }\n\n // Where is car now? (opposite of today's cleaning)\n const currentSide: Side = todayStatus.hasNearSideCleaning ? 'far' : 'near';\n\n // Find next cleaning day\n const nextCleaningDay = findNextCleaningDay(weekView, todayStatus);\n\n if (!nextCleaningDay) {\n // No more cleaning this week\n return { shouldMove: false };\n }\n\n // What side do we need for next cleaning?\n const targetSide = nextCleaningDay.parkOnSide;\n\n if (!targetSide || currentSide === targetSide) {\n // Already on correct side\n return { shouldMove: false };\n }\n\n // Need to move!\n return {\n shouldMove: true,\n currentSide,\n targetSide,\n nextMoveDate: nextCleaningDay.date,\n };\n}\n\n/**\n * Find the next day with active street cleaning\n */\nfunction findNextCleaningDay(\n weekView: WeekView,\n fromDay: DayStatus\n): DayStatus | null {\n const fromIndex = weekView.days.findIndex(d =>\n isSameDayNyc(d.date, fromDay.date)\n );\n\n for (let i = fromIndex + 1; i < weekView.days.length; i++) {\n const day = weekView.days[i];\n if (!day.isSuspended && (day.hasNearSideCleaning || day.hasFarSideCleaning)) {\n return day;\n }\n }\n\n // Look into next week (Monday only)\n // This handles Friday->Monday transition\n const nextMonday = weekView.days.find(d => d.dayOfWeek === 'Mon');\n if (nextMonday && !nextMonday.isSuspended &&\n (nextMonday.hasNearSideCleaning || nextMonday.hasFarSideCleaning)) {\n return nextMonday;\n }\n\n return null;\n}\n\n/**\n * Build weekly strategy message (Sunday 5 AM)\n */\nfunction buildWeeklySummary(\n weekView: WeekView,\n config: Config\n): any {\n const weekStart = formatNycDate(weekView.startDate, 'MMM d');\n const weekEnd = formatNycDate(weekView.endDate, 'MMM d');\n\n // Build emoji calendar with proper spacing for alignment\n // Emojis take ~2 char widths visually, so adjust spacing accordingly\n const icons = weekView.days.map((day, index) => {\n const icon = day.parkOnSide === 'near'\n ? config.nearSideEmoji\n : config.farSideEmoji;\n\n // Add padding after each icon except the last (emoji ~2 chars + 7 spaces = 9 to match \"Mon \")\n return index < weekView.days.length - 1\n ? icon + ' ' // 7 spaces\n : icon;\n }).join('');\n\n const calendarRow = ' ' + icons; // 2 spaces to center under day headers\n const dayHeaders = 'Mon Tue Wed Thu Fri';\n\n // Generate strategy text\n const strategyText = generateStrategyText(weekView, config);\n\n return {\n blocks: [\n {\n type: 'header',\n text: {\n type: 'plain_text',\n text: `🚗 Parking Strategy for ${weekStart} - ${weekEnd}`,\n emoji: true,\n },\n },\n {\n type: 'section',\n text: {\n type: 'mrkdwn',\n text: `\\`${dayHeaders}\\`\\n${calendarRow}`,\n },\n },\n {\n type: 'section',\n text: {\n type: 'mrkdwn',\n text: strategyText,\n },\n },\n {\n type: 'divider',\n },\n ...buildDayBreakdown(weekView, config),\n ],\n };\n}\n\n/**\n * Generate strategy summary text\n */\nfunction generateStrategyText(weekView: WeekView, config: Config): string {\n const suspendedDays = weekView.days.filter(d => d.isSuspended);\n const cleaningDays = weekView.days.filter(d =>\n !d.isSuspended && (d.hasNearSideCleaning || d.hasFarSideCleaning)\n );\n\n if (suspendedDays.length === 0) {\n return `*Normal week* - Standard shuffle pattern. Start on ${config.farSideEmoji} far side Sunday night.`;\n }\n\n const suspendedDayNames = suspendedDays.map(d => d.dayOfWeek).join(', ');\n\n if (cleaningDays.length <= 2) {\n return `*Easy week!* ASP suspended on ${suspendedDayNames}. Only ${cleaningDays.length} cleaning days this week.`;\n }\n\n return `ASP suspended on ${suspendedDayNames}. Adjust your shuffle pattern accordingly.`;\n}\n\n/**\n * Build day-by-day breakdown\n */\nfunction buildDayBreakdown(weekView: WeekView, config: Config): any[] {\n const blocks: any[] = [];\n\n for (const day of weekView.days) {\n const sideEmoji = day.parkOnSide === 'near'\n ? config.nearSideEmoji\n : config.farSideEmoji;\n\n const sideName = day.parkOnSide === 'near' ? 'near' : 'far';\n\n let description = '';\n if (day.isSuspended) {\n description = `${day.suspensionReason || 'ASP suspended'}`;\n } else if (day.hasNearSideCleaning) {\n description = 'near side has cleaning';\n } else if (day.hasFarSideCleaning) {\n description = 'far side has cleaning';\n } else {\n description = 'no cleaning today';\n }\n\n blocks.push({\n type: 'section',\n text: {\n type: 'mrkdwn',\n text: `${sideEmoji} *${day.dayOfWeek}*: Park on ${sideName} side - _${description}_`,\n },\n });\n }\n\n return blocks;\n}\n\n/**\n * Build daily move reminder (10 AM)\n */\nfunction buildMoveReminder(\n decision: MoveDecision,\n config: Config\n): any {\n const fromEmoji = decision.currentSide === 'near'\n ? config.nearSideEmoji\n : config.farSideEmoji;\n\n const toEmoji = decision.targetSide === 'near'\n ? config.nearSideEmoji\n : config.farSideEmoji;\n\n const fromSide = decision.currentSide === 'near' ? 'near' : 'far';\n const toSide = decision.targetSide === 'near' ? 'near' : 'far';\n\n const nextMoveDow = decision.nextMoveDate\n ? getDayOfWeek(decision.nextMoveDate)\n : 'next week';\n\n return {\n blocks: [\n {\n type: 'header',\n text: {\n type: 'plain_text',\n text: '🚗 Move Your Car Now!',\n emoji: true,\n },\n },\n {\n type: 'section',\n text: {\n type: 'mrkdwn',\n text: `From ${fromEmoji} *${fromSide} side* → ${toEmoji} *${toSide} side*`,\n },\n },\n {\n type: 'context',\n elements: [\n {\n type: 'mrkdwn',\n text: `Next move: *${nextMoveDow}*`,\n },\n ],\n },\n ],\n };\n}\n\n/**\n * Build emergency suspension alert (12:30 PM)\n */\nfunction buildEmergencyAlert(reason?: string): any {\n const reasonText = reason\n ? `Street cleaning suspended today due to *${reason}*.`\n : 'Street cleaning suspended today.';\n\n return {\n blocks: [\n {\n type: 'header',\n text: {\n type: 'plain_text',\n text: '⚠️ Emergency ASP Suspension',\n emoji: true,\n },\n },\n {\n type: 'section',\n text: {\n type: 'mrkdwn',\n text: reasonText,\n },\n },\n {\n type: 'section',\n text: {\n type: 'mrkdwn',\n text: 'Your car is safe wherever it\\'s parked. ✅',\n },\n },\n ],\n };\n}\n\n/**\n * Build error notification\n */\nfunction buildErrorNotification(errorMessage: string): any {\n return {\n blocks: [\n {\n type: 'header',\n text: {\n type: 'plain_text',\n text: '🔴 NYC ASP Bot Error',\n emoji: true,\n },\n },\n {\n type: 'section',\n text: {\n type: 'mrkdwn',\n text: `\\`\\`\\`${errorMessage}\\`\\`\\``,\n },\n },\n {\n type: 'context',\n elements: [\n {\n type: 'mrkdwn',\n text: 'Check Val Town logs for details. Verify street cleaning manually today.',\n },\n ],\n },\n ],\n };\n}\n\n/**\n * Send message to Slack via webhook\n */\nasync function sendToSlack(\n webhookUrl: string,\n message: any\n): Promise {\n await retry(\n async () => {\n const response = await fetch(webhookUrl, {\n method: 'POST',\n headers: {\n 'Content-Type': 'application/json',\n },\n body: JSON.stringify(message),\n });\n\n if (!response.ok) {\n const text = await response.text();\n throw new Error(\n `Slack webhook failed: ${response.status} ${response.statusText} - ${text}`\n );\n }\n\n const responseText = await response.text();\n if (responseText !== 'ok') {\n throw new Error(`Slack returned unexpected response: ${responseText}`);\n }\n },\n { maxAttempts: 3, initialDelayMs: 1000 }\n );\n\n console.log('Message sent to Slack successfully');\n}\n\nfunction getEnv(key: string, defaultValue?: string): string {\n const value = process.env[key] || defaultValue;\n if (value === undefined) {\n throw new Error(`Missing required environment variable: ${key}`);\n }\n return value;\n}\n\nfunction parseDays(daysString: string): DayOfWeek[] {\n return daysString.split(',').map(d => d.trim() as DayOfWeek);\n}\n\n/**\n * Load configuration from environment variables with validation\n */\nfunction loadConfig(): Config {\n return {\n // Slack\n slackWebhookUrl: getEnv('SLACK_WEBHOOK_URL'),\n\n // Street cleaning schedule\n nearSideDays: parseDays(getEnv('NEAR_SIDE_DAYS', 'Mon,Thu')),\n farSideDays: parseDays(getEnv('FAR_SIDE_DAYS', 'Tue,Fri')),\n cleaningStartTime: getEnv('CLEANING_START_TIME', '09:00'),\n cleaningEndTime: getEnv('CLEANING_END_TIME', '10:30'),\n\n // Display\n nearSideEmoji: getEnv('NEAR_SIDE_EMOJI', '🏡'),\n farSideEmoji: getEnv('FAR_SIDE_EMOJI', '🌳'),\n\n // Scheduling\n weeklySummaryTime: getEnv('WEEKLY_SUMMARY_TIME', '0 5 * * 0'),\n dailyReminderTime: getEnv('DAILY_REMINDER_TIME', '0 10 * * 1-4'),\n emergencyCheckTime: getEnv('EMERGENCY_CHECK_TIME', '0 5 * * 1-5'),\n };\n}\n\n/**\n * Main entry point - called by Val Town scheduler every hour\n */\nasync function main() {\n try {\n const config = loadConfig();\n const now = getNycNow();\n // Extract hour in NYC timezone (not system timezone)\n const hour = parseInt(formatInTimeZone(now, NYC_TIMEZONE, 'H'), 10);\n const dayOfWeek = getDayOfWeek(now);\n\n console.log(`Running NYC ASP Bot at ${formatNycDate(now, 'yyyy-MM-dd HH:mm')}`);\n\n // Check for force run override\n const forceRun = process.env.FORCE_RUN?.toLowerCase();\n\n // Sat/Sun 5 AM - Weekly summary\n if (forceRun === 'summary' || (hour === 5 && ['Sat', 'Sun'].includes(dayOfWeek))) {\n await sendWeeklySummary(config);\n }\n\n // Mon-Thu 10 AM - Move reminder\n if (forceRun === 'move' || (hour === 10 && ['Mon', 'Tue', 'Wed', 'Thu'].includes(dayOfWeek))) {\n await checkAndSendMoveReminder(config);\n }\n\n // Mon-Fri 5 AM - Emergency check (excluding Sunday to avoid collision with weekly summary)\n if (forceRun === 'emergency' || (hour === 5 && ['Mon', 'Tue', 'Wed', 'Thu', 'Fri'].includes(dayOfWeek))) {\n await checkEmergencySuspension(config);\n }\n\n console.log('NYC ASP Bot run completed');\n } catch (error) {\n console.error('NYC ASP Bot error:', error);\n\n // Try to send error notification\n try {\n const config = loadConfig();\n const errorMsg = error instanceof Error ? error.message : String(error);\n const message = buildErrorNotification(errorMsg);\n await sendToSlack(config.slackWebhookUrl, message);\n } catch (notifyError) {\n console.error('Failed to send error notification:', notifyError);\n }\n }\n}\n\n/**\n * Send weekly parking strategy summary\n */\nasync function sendWeeklySummary(config: any) {\n console.log('Sending weekly summary...');\n\n const rawWeekView = await buildWeekView(config);\n const weekView = optimizeParkingSides(rawWeekView);\n\n const message = buildWeeklySummary(weekView, config);\n await sendToSlack(config.slackWebhookUrl, message);\n\n console.log('Weekly summary sent');\n}\n\n/**\n * Check if move reminder should be sent and send if needed\n */\nasync function checkAndSendMoveReminder(config: any) {\n const rawWeekView = await buildWeekView(config);\n const weekView = optimizeParkingSides(rawWeekView);\n\n const decision = shouldSendMoveReminder(weekView, config);\n\n if (decision.shouldMove) {\n console.log('Sending move reminder...');\n const message = buildMoveReminder(decision, config);\n await sendToSlack(config.slackWebhookUrl, message);\n console.log('Move reminder sent');\n } else {\n console.log('No move needed today');\n }\n}\n\n/**\n * Check for emergency suspension and alert if found\n */\nasync function checkEmergencySuspension(config: any) {\n const today = getNycNow();\n const todayDow = getDayOfWeek(today);\n\n // Only check on weekdays with scheduled cleaning\n if (!config.nearSideDays.includes(todayDow) &&\n !config.farSideDays.includes(todayDow)) {\n console.log('No cleaning scheduled today, skipping emergency check');\n return;\n }\n\n const { suspended, reason } = await isSuspended(today);\n\n // Check if this is an emergency (not a scheduled holiday)\n // This catches snow/weather emergencies and other unplanned suspensions\n // Holidays are already in the ICS calendar, so they're handled by the weekly summary\n\n if (suspended && reason !== 'holiday') {\n console.log('Emergency suspension detected!');\n const message = buildEmergencyAlert(reason);\n await sendToSlack(config.slackWebhookUrl, message);\n console.log('Emergency alert sent');\n } else {\n console.log('No emergency suspension detected');\n }\n}\n\n// Export for Val Town\nmain;\n\n// Export main function as default for Val Town\nexport default main;","deleted","label",[98],"permalink","https://www.val.town/x/saadiq/NYC-ASP-Slack-Notifier/code/index.ts","extension","actionData","errors"]