Event Tracker Package

This package provides a simple way to track events in your application and send them to your analytics server.

Installation

```bash npm install @survey/event-tracker ```

API

EventTracker(options)

Creates a new event tracker instance.

Options:

• serverUrl (string, required): The URL of your analytics server API.
• apiKey (string, required): Your API key.
• batchSize (number, optional): The number of events to batch before sending (default: 10).
• flushInterval (number, optional): The flush interval in milliseconds (default: 5000).

tracker.identify(userId, properties)

Identifies a user.

• userId (string, required): The user ID.
• properties (object, optional): Additional user properties.

tracker.track(eventName, properties)

Tracks an event.

• eventName (string, required): The name of the event.
• properties (object, optional): Additional event properties.

tracker.shutdown()

Flushes any remaining events and clears the flush interval. Call this method when your application is closing to ensure all data is sent.

Streaming and Batching

This package now supports event batching and periodic flushing for improved performance:

• Events are collected in a queue and sent in batches.
• You can configure the batchSize to set how many events should be collected before sending.
• A flushInterval determines how often the event queue should be sent, even if the batch size hasn't been reached.
• If sending fails, events are added back to the queue to be sent later.
• The shutdown method ensures all remaining events are sent before your application closes.

Usage

import EventTracker from '@survey/event-tracker';

const tracker = new EventTracker({
  serverUrl: 'https://your-analytics-server.com/api',
  apiKey: 'your-api-key-here',
  batchSize: 20, // Optional: number of events to batch before sending (default: 10)
  flushInterval: 10000 // Optional: flush interval in milliseconds (default: 5000)
});

// Identify a user
await tracker.identify('user123', { email: '[email protected]' });

// Track events (these will be batched and sent periodically)
tracker.track('Button Clicked', { buttonName: 'Submit' });
tracker.track('Page Viewed', { pageName: 'Home' });

// When your application is closing, make sure to call shutdown
await tracker.shutdown();