multyx/src/messages/message.ts

Framework designed to simplify the creation of multiplayer browser games by addressing the complexities of managing server-client communication, shared state, and input handling

import { CompressUpdate, Update } from "./update";

export default class Message {
    name: string;
    data: any;
    time: number;
    native: boolean;

    /**
     * Constructor for creating messages to send to client
     * @param name
     * @param data 
     */
    private constructor(name: string, data: any, native: boolean = false) {
        this.name = name;
        this.data = data;
        this.time = Date.now();
        this.native = native;
    }

    // Send multyx client native instructions
    static Native(updates: Update[]) {
        const data = [];

        for(const update of updates) {
            data.push(CompressUpdate(update));
        }

        return JSON.stringify(data);
    }

    static Create(name: string, data: any) {
        if(name.length == 0) throw new Error('Multyx message cannot have empty name');
        if(name[0] == '_') name = '_' + name;
        
        if(typeof data === 'function') {
            throw new Error('Multyx data must be JSON storable');
        }

        return JSON.stringify(new Message(name, data));
    }

    // Parse message from user
    static Parse(str: string) {
        try {
            const parsed = JSON.parse(str);
            if(Array.isArray(parsed)) return new Message('_', parsed[0], true);
            return new Message(parsed.name ?? '', parsed.data ?? '', false);
        } catch {
            return null;
        }
    }
}