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const { BetaAnalyticsDataClient } = require('@google-analytics/data');
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const { createClient } = require('redis');
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class AnalyticsService {
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constructor() {
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// Initialize Redis client
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this.redis = createClient({
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url: process.env.REDIS_URL || 'redis://localhost:6379'
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});
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this.redis.on('error', err => console.error('Redis Client Error:', err));
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this.redis.connect().catch(err => console.error('Redis connection error:', err));
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try {
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// Initialize GA4 client
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const credentials = process.env.GOOGLE_APPLICATION_CREDENTIALS_JSON;
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this.analyticsClient = new BetaAnalyticsDataClient({
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credentials: typeof credentials === 'string' ? JSON.parse(credentials) : credentials
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});
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this.propertyId = process.env.GA_PROPERTY_ID;
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} catch (error) {
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console.error('Failed to initialize GA4 client:', error);
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throw error;
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}
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}
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// Cache durations
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CACHE_DURATIONS = {
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REALTIME_BASIC: 60, // 1 minute
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REALTIME_DETAILED: 300, // 5 minutes
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BASIC_METRICS: 3600, // 1 hour
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USER_BEHAVIOR: 3600 // 1 hour
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};
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async getBasicMetrics(startDate = '7daysAgo') {
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const cacheKey = `analytics:basic_metrics:${startDate}`;
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try {
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// Try Redis first
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const cachedData = await this.redis.get(cacheKey);
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if (cachedData) {
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console.log('Analytics metrics found in Redis cache');
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return JSON.parse(cachedData);
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}
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// Fetch from GA4
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console.log('Fetching fresh metrics data from GA4');
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const [response] = await this.analyticsClient.runReport({
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property: `properties/${this.propertyId}`,
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dateRanges: [{ startDate, endDate: 'today' }],
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dimensions: [{ name: 'date' }],
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metrics: [
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{ name: 'activeUsers' },
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{ name: 'newUsers' },
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{ name: 'averageSessionDuration' },
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{ name: 'screenPageViews' },
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{ name: 'bounceRate' },
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{ name: 'conversions' }
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],
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returnPropertyQuota: true
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});
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// Cache the response
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await this.redis.set(cacheKey, JSON.stringify(response), {
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EX: this.CACHE_DURATIONS.BASIC_METRICS
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});
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return response;
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} catch (error) {
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console.error('Error fetching analytics metrics:', {
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error: error.message,
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stack: error.stack
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});
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throw error;
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}
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}
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async getRealTimeBasicData() {
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const cacheKey = 'analytics:realtime:basic';
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try {
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// Try Redis first
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const cachedData = await this.redis.get(cacheKey);
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if (cachedData) {
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console.log('Realtime basic data found in Redis cache');
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return JSON.parse(cachedData);
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}
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console.log('Fetching fresh realtime data from GA4');
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// Fetch active users
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const [userResponse] = await this.analyticsClient.runRealtimeReport({
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property: `properties/${this.propertyId}`,
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metrics: [{ name: 'activeUsers' }],
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returnPropertyQuota: true
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});
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// Fetch last 5 minutes
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const [fiveMinResponse] = await this.analyticsClient.runRealtimeReport({
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property: `properties/${this.propertyId}`,
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metrics: [{ name: 'activeUsers' }],
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minuteRanges: [{ startMinutesAgo: 5, endMinutesAgo: 0 }]
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});
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// Fetch time series data
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const [timeSeriesResponse] = await this.analyticsClient.runRealtimeReport({
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property: `properties/${this.propertyId}`,
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dimensions: [{ name: 'minutesAgo' }],
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metrics: [{ name: 'activeUsers' }]
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});
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const response = {
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userResponse,
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fiveMinResponse,
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timeSeriesResponse,
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quotaInfo: {
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projectHourly: userResponse.propertyQuota.tokensPerProjectPerHour,
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daily: userResponse.propertyQuota.tokensPerDay,
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serverErrors: userResponse.propertyQuota.serverErrorsPerProjectPerHour,
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thresholdedRequests: userResponse.propertyQuota.potentiallyThresholdedRequestsPerHour
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}
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};
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// Cache the response
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await this.redis.set(cacheKey, JSON.stringify(response), {
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EX: this.CACHE_DURATIONS.REALTIME_BASIC
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});
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return response;
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} catch (error) {
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console.error('Error fetching realtime basic data:', {
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error: error.message,
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stack: error.stack
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});
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throw error;
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}
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}
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async getRealTimeDetailedData() {
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const cacheKey = 'analytics:realtime:detailed';
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try {
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// Try Redis first
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const cachedData = await this.redis.get(cacheKey);
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if (cachedData) {
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console.log('Realtime detailed data found in Redis cache');
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return JSON.parse(cachedData);
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}
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console.log('Fetching fresh realtime detailed data from GA4');
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// Fetch current pages
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const [pageResponse] = await this.analyticsClient.runRealtimeReport({
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property: `properties/${this.propertyId}`,
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dimensions: [{ name: 'unifiedScreenName' }],
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metrics: [{ name: 'screenPageViews' }],
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orderBy: [{ metric: { metricName: 'screenPageViews' }, desc: true }],
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limit: 25
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});
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// Fetch events
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const [eventResponse] = await this.analyticsClient.runRealtimeReport({
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property: `properties/${this.propertyId}`,
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dimensions: [{ name: 'eventName' }],
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metrics: [{ name: 'eventCount' }],
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orderBy: [{ metric: { metricName: 'eventCount' }, desc: true }],
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limit: 25
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});
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// Fetch device categories
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const [deviceResponse] = await this.analyticsClient.runRealtimeReport({
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property: `properties/${this.propertyId}`,
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dimensions: [{ name: 'deviceCategory' }],
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metrics: [{ name: 'activeUsers' }],
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orderBy: [{ metric: { metricName: 'activeUsers' }, desc: true }],
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limit: 10,
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returnPropertyQuota: true
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});
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const response = {
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pageResponse,
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eventResponse,
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sourceResponse: deviceResponse
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};
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// Cache the response
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await this.redis.set(cacheKey, JSON.stringify(response), {
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EX: this.CACHE_DURATIONS.REALTIME_DETAILED
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});
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return response;
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} catch (error) {
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console.error('Error fetching realtime detailed data:', {
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error: error.message,
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stack: error.stack
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});
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throw error;
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}
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}
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async getUserBehavior(timeRange = '30') {
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const cacheKey = `analytics:user_behavior:${timeRange}`;
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try {
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// Try Redis first
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const cachedData = await this.redis.get(cacheKey);
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if (cachedData) {
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console.log('User behavior data found in Redis cache');
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return JSON.parse(cachedData);
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}
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console.log('Fetching fresh user behavior data from GA4');
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// Fetch page data
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const [pageResponse] = await this.analyticsClient.runReport({
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property: `properties/${this.propertyId}`,
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dateRanges: [{ startDate: `${timeRange}daysAgo`, endDate: 'today' }],
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dimensions: [{ name: 'pagePath' }],
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metrics: [
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{ name: 'screenPageViews' },
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{ name: 'averageSessionDuration' },
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{ name: 'bounceRate' },
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{ name: 'sessions' }
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],
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orderBy: [{
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metric: { metricName: 'screenPageViews' },
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desc: true
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}],
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limit: 25
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});
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// Fetch device data
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const [deviceResponse] = await this.analyticsClient.runReport({
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property: `properties/${this.propertyId}`,
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dateRanges: [{ startDate: `${timeRange}daysAgo`, endDate: 'today' }],
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dimensions: [{ name: 'deviceCategory' }],
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metrics: [
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{ name: 'screenPageViews' },
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{ name: 'sessions' }
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]
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});
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// Fetch source data
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const [sourceResponse] = await this.analyticsClient.runReport({
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property: `properties/${this.propertyId}`,
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dateRanges: [{ startDate: `${timeRange}daysAgo`, endDate: 'today' }],
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dimensions: [{ name: 'sessionSource' }],
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metrics: [
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{ name: 'sessions' },
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{ name: 'conversions' }
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],
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orderBy: [{
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metric: { metricName: 'sessions' },
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desc: true
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}],
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limit: 25,
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returnPropertyQuota: true
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});
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const response = {
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pageResponse,
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deviceResponse,
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sourceResponse
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};
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// Cache the response
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await this.redis.set(cacheKey, JSON.stringify(response), {
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EX: this.CACHE_DURATIONS.USER_BEHAVIOR
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});
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return response;
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} catch (error) {
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console.error('Error fetching user behavior data:', {
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error: error.message,
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stack: error.stack
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});
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throw error;
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}
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}
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}
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module.exports = new AnalyticsService();
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