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@jsxImportSource https://esm.sh/react@18.2.0 */\nimport { createContext, useContext, useMemo, useState, useEffect, useRef, useCallback, type ReactNode, type FC } from '../deps.ts';\nimport { subDays, subWeeks, subMonths, isAfter, parseISO } from 'https://cdn.jsdelivr.net/npm/date-fns@3.6.0/+esm';\nimport { formatSiteName, normalizeSiteName } from '../../shared/utils.ts';\nimport type { AnalyticsData, SiteStats } from '../../shared/types.ts';\n\ninterface AnalyticsContextType {\n overallStats: {\n totalSites: number;\n totalViews: number;\n totalPaths: number;\n dayViews: number;\n weekViews: number;\n monthViews: number;\n dayPercentage: number;\n weekPercentage: number;\n monthPercentage: number;\n uniqueVisitors: number;\n };\n sitesData: AnalyticsData;\n topPaths: Array<{ site: string; fullSite: string; path: string; views: number }>;\n topReferrers: Array<{ referrer: string; visits: number }>;\n visitorOrigins: Record;\n viewsOverTime: Record;\n chartData: {\n browsers: Record;\n os: Record;\n screenSizes: Record;\n countries: Record;\n timeData: Record;\n };\n allSites: Array<{ name: string; fullName: string; totalViews: number }>;\n error: string | null;\n connectionStatus: string;\n analyticsData: AnalyticsData;\n currentSite: string | null;\n setCurrentSite: (site: string | null) => void;\n siteExists: (siteName: string) => boolean;\n retryConnection: () => void;\n}\n\nconst AnalyticsContext = createContext(undefined);\n\nexport const useAnalytics = () => {\n const context = useContext(AnalyticsContext);\n if (!context) {\n throw new Error('useAnalytics must be used within an AnalyticsProvider');\n }\n return context;\n};\n\nconst findMatchingSite = (siteName: string | null, analyticsData: AnalyticsData): string | undefined => {\n if (!siteName) return undefined;\n const normalizedSiteName = normalizeSiteName(siteName);\n return Object.keys(analyticsData).find(site =>\n normalizeSiteName(site) === normalizedSiteName\n );\n};\n\nconst browserMap: Record = {\n 'Chrome': ['Chrome', 'Chromium'],\n 'Firefox': ['Firefox'],\n 'Safari': ['Safari'],\n 'Edge': ['Edge', 'Edg'],\n 'Opera': ['Opera'],\n 'IE': ['Internet Explorer', 'IE'],\n 'Other': ['Other']\n};\n\nconst osMap: Record = {\n 'Windows': ['Windows'],\n 'macOS': ['Mac', 'macOS'],\n 'iOS': ['iPhone', 'iPad', 'iOS'],\n 'Android': ['Android'],\n 'Linux': ['Linux', 'Ubuntu', 'Debian', 'Fedora', 'Red Hat', 'CentOS'],\n 'Other': ['Other']\n};\n\nfunction mapName(name: string, map: Record): string {\n for (const [key, values] of Object.entries(map)) {\n if (values.some(value => name.includes(value))) {\n return key;\n }\n }\n return 'Other';\n}\n\nfunction categorizeScreenSize(width: number): string {\n if (width < 768) return 'Phone';\n if (width < 1024) return 'Tablet';\n if (width < 1440) return 'Laptop';\n return 'Desktop';\n}\n\nconst calculatePercentages = (siteData: AnalyticsData) => {\n let dayViews = 0, weekViews = 0, monthViews = 0;\n const uniqueVisitors = new Set();\n const now = new Date();\n const oneDayAgo = subDays(now, 1);\n const oneWeekAgo = subWeeks(now, 1);\n const oneMonthAgo = subMonths(now, 1);\n\n Object.entries(siteData).forEach(([siteName, site]) => {\n Object.entries(site.paths || {}).forEach(([pathName, pathData]) => {\n (pathData.viewTimestamps || []).forEach((timestamp) => {\n const date = parseISO(timestamp);\n if (!isNaN(date.getTime())) {\n uniqueVisitors.add(`${siteName}-${pathName}-${timestamp.split('T')[0]}`);\n if (isAfter(date, oneDayAgo)) dayViews++;\n if (isAfter(date, oneWeekAgo)) weekViews++;\n if (isAfter(date, oneMonthAgo)) monthViews++;\n }\n });\n });\n });\n\n const totalViews = Object.values(siteData).reduce((sum, site) => sum + site.totalViews, 0);\n\n const dayPercentage = totalViews > 0 ? (dayViews / totalViews) * 100 : 0;\n const weekPercentage = totalViews > 0 ? (weekViews / totalViews) * 100 : 0;\n const monthPercentage = totalViews > 0 ? (monthViews / totalViews) * 100 : 0;\n\n return {\n dayPercentage,\n weekPercentage,\n monthPercentage,\n dayViews,\n weekViews,\n monthViews,\n totalViews,\n uniqueVisitors: uniqueVisitors.size\n };\n};\n\nconst aggregateData = (siteData: AnalyticsData, key: string): Record => {\n return Object.values(siteData).reduce((aggregatedData, site) => {\n Object.values(site.paths || {}).forEach(path => {\n Object.entries((path as any)[key] || {}).forEach(([item, count]) => {\n let mappedItem: string;\n switch (key) {\n case 'browsers':\n mappedItem = mapName(item, browserMap);\n break;\n case 'os':\n mappedItem = mapName(item, osMap);\n break;\n case 'screenSizes':\n mappedItem = categorizeScreenSize(parseInt(item.split('x')[0]));\n break;\n default:\n mappedItem = item;\n }\n aggregatedData[mappedItem] = (aggregatedData[mappedItem] || 0) + (count as number);\n });\n });\n return aggregatedData;\n }, {} as Record);\n};\n\nconst aggregateViewsOverTime = (siteData: AnalyticsData): Record => {\n const timeData: Record = {};\n Object.values(siteData).forEach(site => {\n Object.values(site.paths || {}).forEach(path => {\n (path.viewTimestamps || []).forEach(timestamp => {\n const date = timestamp.split('T')[0];\n timeData[date] = (timeData[date] || 0) + 1;\n });\n });\n });\n return timeData;\n};\n\nconst aggregateReferrers = (siteData: AnalyticsData): Array<{ referrer: string; visits: number }> => {\n const referrers: Record = {};\n Object.values(siteData).forEach(site => {\n Object.values(site.paths || {}).forEach(pathData => {\n Object.entries(pathData.referrers || {}).forEach(([referrer, count]) => {\n referrers[referrer] = (referrers[referrer] || 0) + count;\n });\n });\n });\n\n return Object.entries(referrers)\n .map(([referrer, visits]) => ({ referrer: referrer || '(direct)', visits }))\n .sort((a, b) => b.visits - a.visits)\n .slice(0, 10);\n};\n\nconst defaultData = {\n overallStats: { totalSites: 0, totalViews: 0, totalPaths: 0, dayViews: 0, weekViews: 0, monthViews: 0, dayPercentage: 0, weekPercentage: 0, monthPercentage: 0, uniqueVisitors: 0 },\n sitesData: {} as AnalyticsData,\n topPaths: [],\n topReferrers: [],\n visitorOrigins: {},\n viewsOverTime: {},\n chartData: { browsers: {}, os: {}, screenSizes: {}, countries: {}, timeData: {} },\n allSites: []\n};\n\nconst saveToLocalStorage = (key: string, value: any) => {\n localStorage.setItem(key, JSON.stringify(value));\n};\n\nconst loadFromLocalStorage = (key: string): any => {\n const data = localStorage.getItem(key);\n return data ? JSON.parse(data) : null;\n};\n\ninterface AnalyticsProviderProps {\n children: ReactNode;\n site?: string | null;\n}\n\n// Parse initial data from server-injected JSON script tag (XSS-safe pattern)\nconst getInitialAnalyticsData = (): AnalyticsData => {\n if (typeof window === 'undefined') return {};\n \n // First try server-injected data (faster initial load, no extra request)\n const initialDataElement = document.getElementById('initial-data');\n if (initialDataElement?.textContent?.trim()) {\n try {\n const serverData = JSON.parse(initialDataElement.textContent);\n if (Object.keys(serverData).length > 0) {\n saveToLocalStorage('analyticsData', serverData);\n return serverData;\n }\n } catch (e) {\n console.warn('Failed to parse server-injected initial data:', e);\n }\n }\n \n // Fall back to localStorage cache\n return loadFromLocalStorage('analyticsData') || {};\n};\n\nexport const AnalyticsProvider: FC = ({ children, site }) => {\n const [analyticsData, setAnalyticsData] = useState(getInitialAnalyticsData);\n const [error, setError] = useState(null);\n const [connectionStatus, setConnectionStatus] = useState('Connecting');\n const eventSourceRef = useRef(null);\n const retryTimeoutRef = useRef(null);\n const retryCountRef = useRef(0);\n const [currentSite, setCurrentSite] = useState(site || null);\n\n const MAX_RETRIES = 5;\n const INITIAL_RETRY_DELAY = 3000; // 3 seconds\n\n const setupDataStream = useCallback(() => {\n if (eventSourceRef.current) {\n return eventSourceRef.current;\n }\n\n const CLIENT_IDENTIFIER = 'counterTown-Dashboard';\n const STREAM_URL = `${window.location.origin}/stream?client=${CLIENT_IDENTIFIER}`;\n const eventSource = new EventSource(STREAM_URL);\n eventSourceRef.current = eventSource;\n\n let isInitialConnection = true;\n\n eventSource.onopen = () => {\n console.log('SSE connection opened');\n setConnectionStatus('Connected');\n retryCountRef.current = 0;\n isInitialConnection = false;\n };\n\n eventSource.onmessage = (event) => {\n try {\n const newData = JSON.parse(event.data);\n setAnalyticsData(prevData => {\n if (JSON.stringify(prevData) !== JSON.stringify(newData)) {\n saveToLocalStorage('analyticsData', newData);\n return newData;\n }\n return prevData;\n });\n setError(null);\n } catch (error) {\n console.error('Error parsing SSE data:', error);\n setError('Failed to parse analytics data.');\n }\n };\n\n eventSource.onerror = (error) => {\n if (isInitialConnection) {\n isInitialConnection = false;\n return;\n }\n\n if (document.visibilityState === 'hidden') {\n return;\n }\n\n console.warn('SSE Error:', error);\n setConnectionStatus('Error - Reconnecting');\n retryConnection();\n };\n\n return eventSource;\n }, []);\n\n const retryConnection = useCallback(() => {\n if (retryCountRef.current >= MAX_RETRIES) {\n console.error('Max retries reached. Please refresh the page.');\n setConnectionStatus('Connection Failed');\n return;\n }\n\n const retryDelay = Math.min(INITIAL_RETRY_DELAY * (2 ** retryCountRef.current), 30000);\n console.log(`Retrying connection in ${retryDelay}ms (Attempt ${retryCountRef.current + 1}/${MAX_RETRIES})`);\n\n if (retryTimeoutRef.current !== null) {\n clearTimeout(retryTimeoutRef.current);\n }\n retryTimeoutRef.current = window.setTimeout(() => {\n retryCountRef.current += 1;\n if (eventSourceRef.current) {\n eventSourceRef.current.close();\n }\n eventSourceRef.current = null;\n setupDataStream();\n }, retryDelay);\n }, [setupDataStream]);\n\n useEffect(() => {\n const eventSource = setupDataStream();\n\n const handleVisibilityChange = () => {\n if (document.visibilityState === 'visible' && !eventSourceRef.current) {\n console.log('Page became visible, re-establishing SSE connection');\n setupDataStream();\n }\n };\n\n window.addEventListener('visibilitychange', handleVisibilityChange);\n\n return () => {\n window.removeEventListener('visibilitychange', handleVisibilityChange);\n };\n }, [setupDataStream]);\n\n const processedData = useMemo(() => {\n if (!analyticsData) return defaultData;\n\n try {\n const matchingSite = findMatchingSite(currentSite, analyticsData);\n const siteData = matchingSite ? { [matchingSite]: analyticsData[matchingSite] } : analyticsData;\n\n const {\n dayPercentage, weekPercentage, monthPercentage,\n dayViews, weekViews, monthViews,\n totalViews, uniqueVisitors\n } = calculatePercentages(siteData);\n\n const totalSites = Object.keys(siteData).length;\n const totalPaths = Object.values(siteData).reduce((sum, site) => sum + Object.keys(site?.paths || {}).length, 0);\n\n const topPaths = Object.entries(siteData).flatMap(([site, siteData]) =>\n Object.entries(siteData?.paths || {}).map(([path, pathData]) => ({\n site: formatSiteName(site),\n fullSite: site,\n path,\n views: pathData.views || 0\n }))\n ).sort((a, b) => b.views - a.views).slice(0, 10);\n\n const topReferrers = aggregateReferrers(siteData);\n\n const visitorOrigins = aggregateData(siteData, 'countries');\n\n const viewsOverTime = aggregateViewsOverTime(siteData);\n\n const chartData = {\n browsers: aggregateData(siteData, 'browsers'),\n os: aggregateData(siteData, 'os'),\n screenSizes: aggregateData(siteData, 'screenSizes'),\n countries: visitorOrigins,\n timeData: viewsOverTime\n };\n\n const allSites = Object.keys(analyticsData).map(site => ({\n name: formatSiteName(site),\n fullName: site,\n totalViews: analyticsData[site].totalViews || 0\n })).sort((a, b) => b.totalViews - a.totalViews);\n\n return {\n overallStats: {\n totalSites, totalViews, totalPaths,\n dayViews, weekViews, monthViews,\n dayPercentage, weekPercentage, monthPercentage,\n uniqueVisitors\n },\n sitesData: siteData,\n topPaths,\n topReferrers,\n visitorOrigins,\n viewsOverTime,\n chartData,\n allSites\n };\n } catch (error) {\n console.error('Error processing analytics data:', error);\n return defaultData;\n }\n }, [analyticsData, currentSite]);\n\n const siteExists = useCallback((siteName: string) => {\n return !!findMatchingSite(siteName, analyticsData);\n }, [analyticsData]);\n\n const contextValue = useMemo(() => ({\n ...processedData,\n error,\n connectionStatus,\n analyticsData,\n currentSite,\n setCurrentSite,\n siteExists,\n retryConnection: () => {\n retryCountRef.current = 0;\n retryConnection();\n }\n }), [processedData, error, connectionStatus, analyticsData, retryConnection, currentSite, siteExists]);\n\n return (\n \n {children}\n \n );\n};\n","deleted","label",[180,181,164],"frontend","contexts","permalink","https://www.val.town/x/stevekrouse/counterTownNico/code/frontend/contexts/AnalyticsContext.tsx","extension","actionData","errors"]