@heroiclabs/nakama-js
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    2.3.0 • Public • Published

    Nakama JavaScript client

    JavaScript client for Nakama server written in TypeScript. For browser and React Native projects.

    Nakama is an open-source server designed to power modern games and apps. Features include user accounts, chat, social, matchmaker, realtime multiplayer, and much more.

    This client implements the full API and socket options with the server. It's written in TypeScript with minimal dependencies to be compatible with all modern browsers and React Native.

    Full documentation is online - https://heroiclabs.com/docs/javascript-client-guide

    Getting Started

    You'll need to setup the server and database before you can connect with the client. The simplest way is to use Docker but have a look at the server documentation for other options.

    1. Install and run the servers. Follow these instructions.

    2. Import the client into your project. It's available on NPM and can be also be added to a project with Bower or other package managers.

      yarn add "@heroiclabs/nakama-js"

      You'll now see the code in the "node_modules" folder and package listed in your "package.json".

      Optionally, if you would like to use the Protocol Buffers wire format with your sockets, you can import the adapter found in this package:

      yarn add "@heroiclabs/nakama-js-protobuf"
    3. Use the connection credentials to build a client object.

      import {Client} from "@heroiclabs/nakama-js";
      
      var useSSL = false; // Enable if server is run with an SSL certificate.
      var client = new Client("defaultkey", "127.0.0.1", "7350", useSSL);

    Usage

    The client object has many methods to execute various features in the server or open realtime socket connections with the server.

    Authenticate

    There's a variety of ways to authenticate with the server. Authentication can create a user if they don't already exist with those credentials. It's also easy to authenticate with a social profile from Google Play Games, Facebook, Game Center, etc.

    var email = "super@heroes.com";
    var password = "batsignal";
    const session = await client.authenticateEmail(email, password);
    console.info(session);

    Sessions

    When authenticated the server responds with an auth token (JWT) which contains useful properties and gets deserialized into a Session object.

    console.info(session.token); // raw JWT token
    console.info(session.refreshToken); // refresh token
    console.info(session.userId);
    console.info(session.username);
    console.info("Session has expired?", session.isexpired(Date.now() / 1000));
    const expiresat = session.expires_at;
    console.warn("Session will expire at", new Date(expiresat * 1000).toISOString());

    It is recommended to store the auth token from the session and check at startup if it has expired. If the token has expired you must reauthenticate. The expiry time of the token can be changed as a setting in the server.

    // Assume we've stored the auth token in browser Web Storage.
    const authtoken = window.localStorage.getItem("nkauthtoken");
    const refreshtoken = window.localStorage.getItem("nkrefreshtoken");
    
    let session = nakamajs.Session.restore(authtoken, refreshtoken);
    
    // Check whether a session is close to expiry.
    
    const unixTimeInFuture = Date.now() + 8.64e+7; // one day from now
    
    if (session.isexpired(unixTimeInFuture / 1000)) {
        try
        {
            session = await client.sessionRefresh(session);
        }
        catch (e)
        {
            console.info("Session can no longer be refreshed. Must reauthenticate!");
        }
    }

    Requests

    The client includes lots of builtin APIs for various features of the game server. These can be accessed with the methods which return Promise objects. It can also call custom logic as RPC functions on the server. These can also be executed with a socket object.

    All requests are sent with a session object which authorizes the client.

    const account = await client.getAccount(session);
    console.info(account.user.id);
    console.info(account.user.username);
    console.info(account.wallet);

    Socket

    The client can create one or more sockets with the server. Each socket can have it's own event listeners registered for responses received from the server.

    const secure = false; // Enable if server is run with an SSL certificate
    const trace = false;
    const socket = client.createSocket(secure, trace);
    socket.ondisconnect = (evt) => {
        console.info("Disconnected", evt);
    };
    
    const session = await socket.connect(session);
    // Socket is open.

    If you are using the optional protocol buffer adapter, pass the adapter to the Socket object during construction:

    import {WebSocketAdapterPb} from "@heroiclabs/nakama-js-protobuf"
    
    const secure = false; // Enable if server is run with an SSL certificate
    const trace = false;
    const socket = client.createSocket(secure, trace, new WebSocketAdapterPb());

    There's many messages for chat, realtime, status events, notifications, etc. which can be sent or received from the socket.

    socket.onchannelmessage = (message) => {
        console.info("Message received from channel", message.channel_id);
        console.info("Received message", message);
    };
    
    
    // 1 = room, 2 = Direct Message, 3 = Group
    const type : number = 1;
    const roomname = "mychannel";
    const persistence : boolean = false;
    const hidden : boolean = false;
    
    const channel = await socket.joinChat(type, roomname, persistence, hidden);
    
    const message = { "hello": "world" };
    socket.writeChatMessage(channel.channel.id, message);

    Contribute

    The development roadmap is managed as GitHub issues and pull requests are welcome. If you're interested in enhancing the code please open an issue to discuss the changes or drop in and discuss it in the community forum.

    Source Builds

    Ensure you are using Node v12.18.1.

    The codebase is multi-package monorepo written in TypeScript and can be built with esbuild. All dependencies are managed with Yarn.

    To build from source, install dependencies and build the nakama-js and nakama-js-protobuf subrepositories:

    yarn workspace @heroiclabs/nakama-js install && yarn workspace @heroiclabs/nakama-js build
    yarn workspace @heroiclabs/nakama-js-protobuf install && yarn workspace @heroiclabs/nakama-js-protobuf build

    Run Tests

    To run tests you will need to run the server and database. Most tests are written as integration tests which execute against the server. A quick approach we use with our test workflow is to use the Docker compose file described in the documentation.

    Tests are run against each workspace bundle; if you have made source code changes, you should yarn workspace <workspace> build prior to running tests.

    docker-compose -f ./docker-compose.yml up
    yarn workspace @heroiclabs/nakama-js-test run test

    Note on Yarn workspaces and testing particular versions of nakama-js from the nakama-js-test workspace: Yarn will first look at the remote NPM registry for the nakama-js version specified. If that is not found, it will symlink the local nakama-js workspace into node_modules which is necessary for running tests against local changes.

    Protocol Buffer Web Socket Adapter

    To update the generated Typescript required for using the protocol buffer adapter, cd into packages/nakama-js-protobuf and run the following:

    npx protoc \
    --plugin="./node_modules/.bin/protoc-gen-ts_proto" \
    --proto_path=$GOPATH/src/github.com/heroiclabs/nakama-common \
    --ts_proto_out=. \
    --ts_proto_opt=snakeToCamel=false \
    --ts_proto_opt=useOptionals=true \
    --ts_proto_opt=oneof=unions \
    --ts_proto_opt=esModuleInterop=true \
    $GOPATH/src/github.com/heroiclabs/nakama-common/rtapi/realtime.proto \
    $GOPATH/src/github.com/heroiclabs/nakama-common/api/api.proto

    Release Process

    To release onto NPM if you have access to the "@heroiclabs" organization you can use Yarn.

    yarn workspace <workspace> run build && yarn workspace <workspace> npm publish --access=public

    License

    This project is licensed under the Apache-2 License.

    Install

    npm i @heroiclabs/nakama-js

    DownloadsWeekly Downloads

    668

    Version

    2.3.0

    License

    Apache-2.0

    Unpacked Size

    1.43 MB

    Total Files

    197

    Last publish

    Collaborators

    • novabyte
    • zyro
    • lugehorsam