socio/dist/chat.js

A WebSocket Real-Time Communication (RTC) API framework.

import { E } from "./logging.js";
export class ServerChatRoom {
    static #room_ids = new Set();
    static #id_counter = 0;
    #room_id;
    #users = new Set();
    #messages = new Set();
    history_length;
    server_interface;
    constructor(ServerSendToClients, message_history_length = 10) {
        const room_id = ++ServerChatRoom.#id_counter;
        ServerChatRoom.#room_ids.add(room_id);
        this.#room_id = room_id;
        this.history_length = message_history_length;
        this.server_interface = ServerSendToClients;
    }
    CloseRoom() { ServerChatRoom.#room_ids.delete(this.#room_id); }
    get room_id() { return this.#room_id; }
    static get room_ids() { return ServerChatRoom.#room_ids; }
    Join(client_id) {
        this.#users.add({ client_id });
        this.server_interface([client_id], { rel: 'SocioChatRoom', type: 'msg_history', msgs: this.#messages });
    }
    Leave(client_id) { this.#users.delete({ client_id }); }
    Post(client_id, text) {
        const new_message = { user: { client_id }, ts: (new Date()).getTime(), text };
        this.#messages.add(new_message);
        if (this.#messages.size > this.history_length)
            this.#messages.delete(this.#messages.values().next().value);
        const clients = [...this.#users.values()].map(c => c.client_id);
        this.server_interface(clients, { rel: 'SocioChatRoom', type: 'new_msg', msgs: new Set([new_message]) });
    }
}
export class ChatRoomClient {
    #current_room_id = 0;
    serv;
    msg_hook;
    constructor(ClientSendToServer, msg_hook) {
        this.serv = ClientSendToServer;
        this.msg_hook = msg_hook;
    }
    Join(room_id) {
        this.serv({ rel: 'SocioChatRoom', type: 'join', room_id });
        this.#current_room_id = room_id;
    }
    Leave() { this.serv({ rel: 'SocioChatRoom', type: 'leave', room_id: this.#current_room_id }); }
    Post(text) { this.serv({ rel: 'SocioChatRoom', type: 'new_msg', text, room_id: this.#current_room_id }); }
    Receive(msgs) { this.msg_hook(msgs); }
}
export function HandleChatRoomServ(client, data, chat_rooms) {
    if (data?.data?.rel == 'SocioChatRoom') {
        const chat = chat_rooms.find(c => c.room_id === data.data?.room_id);
        if (!chat)
            return;
        switch (data.data?.type) {
            case 'join': {
                chat.Join(client.id);
                break;
            }
            case 'leave': {
                chat.Leave(client.id);
                break;
            }
            case 'new_msg': {
                chat.Post(client.id, data.data?.text);
                break;
            }
            default: throw new E('Unknown SocioChatRoom SERV msg type!');
        }
    }
}
export function HandleChatRoomCMD(data, chat) {
    if (data?.rel == 'SocioChatRoom') {
        switch (data?.type) {
            case 'msg_history': {
                chat.Receive(data?.msgs);
                break;
            }
            case 'new_msg': {
                chat.Receive(data?.msgs);
                break;
            }
            default: throw new E('Unknown SocioChatRoom CMD msg type!');
        }
    }
}