@adopture/next/dist/middleware.mjs.map

Next.js SDK for Adopture feature adoption tracking with SSR support

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* Next.js Middleware integration for Adopture\n * Provides edge runtime compatible tracking for route changes and performance metrics\n */\n\nimport { NextRequest, NextResponse } from 'next/server';\nimport type { MiddlewareConfig } from './types';\nimport { shouldExcludeRoute, extractUserId, sanitizeMetadata, now } from './shared/utils';\n\n/**\n * Adopture middleware for Next.js\n * Tracks route changes and performance metrics at the edge\n */\nexport function createAdoptureMiddleware(config: MiddlewareConfig) {\n  return async function adoptureMiddleware(request: NextRequest): Promise<NextResponse> {\n    const startTime = now();\n    const pathname = request.nextUrl.pathname;\n    \n    // Check if route should be tracked\n    if (shouldExcludeRoute(pathname, config.excludeRoutes, config.includeRoutes)) {\n      return NextResponse.next();\n    }\n\n    // Extract user ID from request\n    const userId = config.userIdExtractor?.(request) || extractUserIdFromHeaders(request.headers);\n    \n    // Extract metadata from request\n    const metadata = {\n      ...(config.metadataExtractor?.(request) || {}),\n      pathname,\n      method: request.method,\n      userAgent: request.headers.get('user-agent') || '',\n      referer: request.headers.get('referer') || '',\n      ip: getClientIP(request),\n      country: (request as any).geo?.country || '',\n      city: (request as any).geo?.city || '',\n      region: (request as any).geo?.region || '',\n    };\n\n    let response: NextResponse;\n    let success = true;\n    let error: string | null = null;\n\n    try {\n      response = NextResponse.next();\n    } catch (e) {\n      success = false;\n      error = e instanceof Error ? e.message : 'Unknown error';\n      response = NextResponse.next();\n    }\n\n    // Track route access if enabled\n    if (config.enableRouteTracking && userId) {\n      const routeEvent = {\n        featureId: `route-${pathname.replace(/[^a-zA-Z0-9_.-]/g, '-')}`,\n        userId,\n        metadata: sanitizeMetadata({\n          ...metadata,\n          success,\n          error,\n          duration: now() - startTime,\n        }),\n        timestamp: startTime,\n      };\n\n      // Send event asynchronously to avoid blocking the response\n      sendTrackingEvent(config, 'route', routeEvent).catch(err => {\n        console.error('[ADOPTURE-MIDDLEWARE] Failed to send route event:', err);\n      });\n    }\n\n    // Track performance metrics if enabled\n    if (config.enablePerformanceTracking && userId) {\n      const performanceEvent = {\n        featureId: 'middleware:performance',\n        userId,\n        metadata: sanitizeMetadata({\n          ...metadata,\n          responseTime: now() - startTime,\n          success,\n          error,\n        }),\n        timestamp: startTime,\n      };\n\n      // Send event asynchronously\n      sendTrackingEvent(config, 'performance', performanceEvent).catch(err => {\n        console.error('[ADOPTURE-MIDDLEWARE] Failed to send performance event:', err);\n      });\n    }\n\n    // Add tracking headers to response (for client-side correlation)\n    response.headers.set('x-adopture-request-id', generateRequestId());\n    response.headers.set('x-adopture-timestamp', startTime.toString());\n    \n    if (userId) {\n      response.headers.set('x-adopture-user-id', userId);\n    }\n\n    return response;\n  };\n}\n\n/**\n * Send tracking event to Adopture API\n */\nasync function sendTrackingEvent(\n  config: MiddlewareConfig,\n  type: string,\n  event: any\n): Promise<void> {\n  const payload = {\n    type,\n    event,\n    timestamp: now(),\n    source: 'middleware',\n  };\n\n  try {\n    // Convert to tRPC format for middleware events\n    const tRPCPayload = {\n      projectId: '35207190-2644-4230-b088-9ada94638e5d',\n      featureId: event.featureId || `route-${payload.type}`,\n      userId: event.userId || 'anonymous',\n      eventType: 'feature_exposed' as const,\n      sessionId: event.sessionId || `middleware-${Date.now()}`,\n      metadata: event.metadata || {}\n    };\n    \n    const response = await fetch(`${config.apiUrl || 'http://localhost:3001'}/trpc/featureAdoption.trackEvent`, {\n      method: 'POST',\n      headers: {\n        'Content-Type': 'application/json',\n        'Authorization': `Bearer ${config.apiKey}`,\n        'User-Agent': 'adopture-next-middleware/0.1.0',\n      },\n      body: JSON.stringify(tRPCPayload),\n    });\n\n    if (!response.ok) {\n      const errorText = await response.text();\n      throw new Error(`HTTP ${response.status}: ${errorText}`);\n    }\n  } catch (error) {\n    // Re-throw for caller to handle\n    throw error;\n  }\n}\n\n/**\n * Extract user ID from request headers\n */\nfunction extractUserIdFromHeaders(headers: Headers): string | null {\n  // Try authorization header\n  const authHeader = headers.get('authorization');\n  if (authHeader) {\n    // Extract from Bearer token\n    const match = authHeader.match(/Bearer\\s+(.+)/i);\n    if (match) {\n      // Try to decode user ID from token (simplified)\n      try {\n        const tokenParts = match[1].split('.');\n        if (tokenParts.length === 3) {\n          // JWT-like token\n          const payload = JSON.parse(atob(tokenParts[1]));\n          return payload.sub || payload.userId || payload.user_id || null;\n        }\n      } catch {\n        // Not a JWT, continue\n      }\n    }\n  }\n\n  // Try custom headers\n  const userIdHeader = headers.get('x-user-id') || \n                      headers.get('x-user') || \n                      headers.get('user-id');\n  if (userIdHeader) {\n    return userIdHeader;\n  }\n\n  // Try cookie header\n  const cookieHeader = headers.get('cookie');\n  if (cookieHeader) {\n    const cookies = parseCookies(cookieHeader);\n    return cookies.userId || cookies.user_id || cookies['user-id'] || null;\n  }\n\n  return null;\n}\n\n/**\n * Get client IP address from request\n */\nfunction getClientIP(request: NextRequest): string {\n  // Try various headers for client IP\n  const forwardedFor = request.headers.get('x-forwarded-for');\n  if (forwardedFor) {\n    return forwardedFor.split(',')[0].trim();\n  }\n\n  const realIP = request.headers.get('x-real-ip');\n  if (realIP) {\n    return realIP;\n  }\n\n  const cfConnectingIP = request.headers.get('cf-connecting-ip');\n  if (cfConnectingIP) {\n    return cfConnectingIP;\n  }\n\n  return (request as any).ip || 'unknown';\n}\n\n/**\n * Parse cookie header string into object\n */\nfunction parseCookies(cookieHeader: string): { [key: string]: string } {\n  const cookies: { [key: string]: string } = {};\n  \n  cookieHeader.split(';').forEach(cookie => {\n    const [name, ...rest] = cookie.split('=');\n    if (name && rest.length > 0) {\n      cookies[name.trim()] = rest.join('=').trim();\n    }\n  });\n\n  return cookies;\n}\n\n/**\n * Generate unique request ID\n */\nfunction generateRequestId(): string {\n  return Math.random().toString(36).substring(2) + Date.now().toString(36);\n}\n\n/**\n * Utility function to create a basic middleware with minimal configuration\n */\nexport function simpleAdoptureMiddleware(apiKey: string, options?: {\n  enableRouteTracking?: boolean;\n  enablePerformanceTracking?: boolean;\n  excludeRoutes?: string[];\n}) {\n  return createAdoptureMiddleware({\n    apiKey,\n    enableRouteTracking: options?.enableRouteTracking ?? true,\n    enablePerformanceTracking: options?.enablePerformanceTracking ?? false,\n    excludeRoutes: options?.excludeRoutes,\n  });\n}\n\n/**\n * Higher-order middleware that wraps existing middleware with Adopture tracking\n */\nexport function withAdoptureTracking<T extends NextRequest>(\n  middleware: (request: T) => NextResponse | Promise<NextResponse>,\n  config: MiddlewareConfig\n) {\n  return async function wrappedMiddleware(request: T): Promise<NextResponse> {\n    const adoptureMiddleware = createAdoptureMiddleware(config);\n    \n    // Run Adopture tracking first\n    await adoptureMiddleware(request);\n    \n    // Then run the original middleware\n    return middleware(request);\n  };\n}\n\n/**\n * Configuration helper for common middleware patterns\n */\nexport const middlewarePresets = {\n  /**\n   * Basic tracking for all routes\n   */\n  basic: (apiKey: string): MiddlewareConfig => ({\n    apiKey,\n    enableRouteTracking: true,\n    enablePerformanceTracking: false,\n  }),\n\n  /**\n   * API-focused tracking\n   */\n  api: (apiKey: string): MiddlewareConfig => ({\n    apiKey,\n    enableRouteTracking: true,\n    enablePerformanceTracking: true,\n    includeRoutes: ['/api/*'],\n  }),\n\n  /**\n   * Page-focused tracking (exclude API routes)\n   */\n  pages: (apiKey: string): MiddlewareConfig => ({\n    apiKey,\n    enableRouteTracking: true,\n    enablePerformanceTracking: false,\n    excludeRoutes: ['/api/*', '/_next/*', '/favicon.ico'],\n  }),\n\n  /**\n   * Full tracking with performance metrics\n   */\n  full: (apiKey: string): MiddlewareConfig => ({\n    apiKey,\n    enableRouteTracking: true,\n    enablePerformanceTracking: true,\n    excludeRoutes: ['/_next/*', '/favicon.ico'],\n  }),\n};"]}