A Rust implementation of Twilio's Message Segment Calculator, originally written in JavaScript.

Overview

This library provides functionality to segment SMS messages, detect their character set, encoding, and other properties. It's particularly useful for applications that need to work with SMS messages at a low level, ensuring proper encoding and segmentation for delivery.

Features

• Segment SMS messages
• Detect character encoding (GSM-7 or UCS-2)
• Smart character encoding
• Handle User Data Headers
• Calculate message size and segment count

Installation

Add the following to your Cargo.toml:

[dependencies]
message_segment_calculator = "0.1.0"

Usage

Here's a basic example of how to use the library:

use message_segment_calculator::{SegmentedMessage, Encoding};

fn main() {
    let message = "Hello, world! 👋";
    let encoding = Encoding::Auto;
    let smart_encoding = true;

    match SegmentedMessage::new(message, encoding, smart_encoding) {
        Ok(segmented_message) => {
            println!("Encoding: {:?}", segmented_message.get_encoding_name());
            println!("Number of segments: {}", segmented_message.segments_count());
            println!("Total size in bits: {}", segmented_message.total_size());
        }
        Err(e) => println!("Error: {}", e),
    }
}

API

The main struct is SegmentedMessage. Here are some of its key methods:

• new(message: &str, encoding: Encoding, smart_encoding: bool) -> Result<SegmentedMessage, String>

  Initializes struct with a given message

• get_encoding_name() -> Encoding

  Returns the detected encoding

• total_size() -> u16

  Returns the total message size in bits

• message_size() -> u16

  Returns the message size in bits (minus UDH)

• segments_count() -> usize

  Returns count of segments

• get_non_gsm_characters() -> HashSet<String>

  Returns vector of all UCS2 characters detected in the message

The other structs are exposed and can be used for their specific operations.

A simple CLI tool is included and can be accessed with cargo run -- "Message. It will print out the statistics for a given string.

Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

License

This project is licensed under the MIT License - see the LICENSE.md file for details.