CravingsInc Analysis SDK (ca-sdk)

🎯 Purpose

The ca-sdk is a lightweight frontend analytics library designed to collect user session, page views, and event interaction data in real time via Socket.IO. Built for CravingsInc platforms, this SDK enables deep insights into user behavior across web applications.

---

⚙️ Tech Stack

• Frontend SDK: TypeScript + React Context + Custom Hooks
• Backend: Node.js + Express + TypeScript
• Real-time: Socket.IO
• Database: PostgreSQL

---

📦 What It Tracks

✅ Sessions

Tracks the lifetime of a user's visit to the app.

• Auto-generates a session ID using uuid
• Detects:
  • Device Type: Mobile, Tablet, Desktop
  • Operating System: Windows, macOS, Android, iOS, etc
  • Browser: Chrome, Safari, Firefox, Edge, etc
• Captures activity like:
  • Clicks, Scrolls, Keyboard input
  • Idle or expired session due to timeout/unmount
• Calculates:
  • Time until login
  • Last active timestamp
  • Save intervals ( Every 3 seconds )

{
  id: string;
  user: { id: string | null; wasLoggedIn: boolean; timeUntilLoggedIn: number };
  createdAt: Date;
  lastActiveAt: Date;
  lastSaveAt: Date;
  deviceInfo: { type: string; os: string; browser: string };
  location?: {
    country: string; // 'US' | 'CA' | etc
    city: string; // 'New York' | 'Toronto' | etc
    region: string; // 'NY' | 'ON' | etc
    coordinates?: {
        lat: number; // latitude
        lng: number; // longitude
    }
  }
  expired: { expired: boolean; reason?: 'unmount' | 'timeout' | 'manual' | null };
}

✅ Page Views

Tracks each time a user navigates to a page route

• URL visited and referring page
• Time started and ended
• Total Time spent
• Scroll depth % reached
• All interactions during that view

{
    id: string; // unique page session id
    sessionId: string; // session id
    url: string; // page url
    referrer: {
      utm_source: string | null;
      utm_medium: string | null;
      utm_campaign?: string | null;
      utm_term?: string | null;
      utm_content?: string | null;
      raw_url?: string;
    };
    timeStarted: Date; // timestamp when the page was loaded
    timeEnded: Date; // timestamp when the page was unloaded
    timeSpent: number; // time spent on the page in milliseconds
    scrollDepth: number; // scroll depth in percentage
    interactionCount: number; // number of interactions on the page
    interactions: EventsInteraction[]; // array of interactions
}

✅ EventsInteraction

Captures specific frontend events:

• Supported Types: click, scroll, input, hover, etc.
• Captures timestamp, target element, and optional event data.

{
    id: string; // unique event id
    sessionId: string; // session id
    type: string; // event type (e.g. 'click', 'scroll', 'input', etc)
    target: string; // target element (e.g. 'button#submit', 'input#email', etc)
    time: Date; // timestamp when the event occurred
    data?: any; // additional data (e.g. { value: 'test' })
}

🧠 How It Works

React SDK Integration

import { CASDK } from '@CravingsInc/ca-sdk';

<BrowserRouter>
    <CASDK>
        <App />
    </CASDK>
</BrowserRouter>

Context Providers

• SessionProvider: Manages session lifecycle, expiration, and refresh
• PageTrackerProvider: Tracks route changes and view lifecycle

Hooks

• useSession(): Access session data and methods ( restartSession, refreshActivity, etc ).
• usePage(): Access current page view state and interactions
• useComponentEvent(): Hook into pre-component interactions

💻 Example Usage

import React from 'react';

function App() {
    return (
        <div style={{ padding: '2rem' }}>
            <h1 data-label="hello-world" data-data={`{ "type": "button", "platform": "EVENTRIX" }`}>Hello from CASDK Example</h1>
        </div>
    );
}

export default App;

const { pageView, scrollDepth, interactionEvents, triggerEvent } = usePage();

useEffect(() => {
  triggerEvent({ type: 'click', target: '#signup-button' });
}, []);

🔄 Rehydration and Expiration

Sessions are stored in localStorage under the key __cravings_ca_sdk_session. When a user closes the browser, the ssion is marked as expired with a reason. If the session expires, it can be restarted on the next visit.

🔐 Privacy & Customization

• Anonymized by default: If no user ID is passed, the SDK tracks anonymous session.
• Extendable: You can customize what events are captured using the triggerEvent() method.

📡 Data Flow

1. SDK initializes in browser
2. SessionManager creates or restores session
3. PageTracker starts a new view on route change
4. Events and views are sent to server via Socket.IO
5. Server persists into PostgreSQL

🛠️ Roadmap / Coming Soon

• Heatmap & scroll visualization
• Offline buffering of events
• Backend dashboard for live session tracking
• More Customization:
  • RefreshSession Handlers
  • SessionServerHandler
  • PageServerHandler

🧪 Development

To run the SDK locally:

pnpm install
pnpm dev

To build:

pnpm build

🧩 Related Packages

• @CravingsInc/ca-sdk-server (WIP): Server-side event ingestion and persistance

🧰 Contributing

We welcome improvement and integrations! Please submit PRs or open issues for bugs/requests.

👨‍🔬 Maintained By

Chidozie Nnaji & CravingsInc Team

Build't for internal use, open for external developers

📬 License

MIT