Nusk

Nusk is a high-performance SMS segment calculator library for Node.js that supports GSM-7 and Unicode encodings, including extended GSM-7 characters. It helps you accurately calculate the number of SMS segments and estimated costs based on message content, making it a reliable replacement for Twilio's segment calculator.

Features

• Detects GSM-7 and Unicode encoding automatically
• Supports extended GSM-7 characters that consume two bytes
• Calculates SMS segments for single and concatenated messages
• Estimates total SMS cost based on configurable cost per segment
• Batch processing for multiple messages
• Caches analysis results for better performance
• Handles large messages efficiently and safely

Installation

npm install nusk

Usage

const { calculateSegments, calculateCost, processBatch } = require("nusk");

const message = "Hello, World!";

const segmentInfo = calculateSegments(message);
console.log(segmentInfo);
// Example output:
// { segments: 1, charsPerSegment: 160, encoding: 'gsm7' }

const cost = calculateCost(message, 0.0075);
console.log(`Cost: $${cost}`);

const batchMessages = [
  { text: "Short message" },
  { text: "😊 Unicode message with emoji" },
];

const batchResults = processBatch(batchMessages);
console.log(batchResults);