![logo](https://pierce.is-serious.business/44U1xXh.png)

MCLC is a NodeJS solution for launching modded and vanilla Minecraft without having to download and format everything yourself.
Basically a core for your Electron or script based launchers.

### Getting support
Since people seem to use this, I've created a Discord server for anyone who needs to get in contact with me or get help!
https://discord.gg/8uYVbXP

### Installing

`npm i minecraft-launcher-core`

### Standard Example
```javascript
const launcher = require('minecraft-launcher-core');

launcher.authenticator.getAuth("email", "password").then(auth => {
    // Save the auth to a file so it can be used later on!
    launcher.core({
        authorization: auth,
        clientPackage: null,
        forge: null,
        root: "C:/Users/user/AppData/Roaming/.mc",
        os: "windows",
        version: {
            number: "1.13.2",
            type: "release" 
        },
        memory: {
            max: "3000",
            min: "1000"
        }
    });
});
```
### Usage

##### launcher.core Options

| Parameter                | Type   | Description                                                                               | Required |
|--------------------------|--------|-------------------------------------------------------------------------------------------|----------|
| `options.authorization`  | Object | The result from `getAuth` function, allows the client to login in online or offline mode. | True     |
| `options.clientPackage`  | String | Path to the client package zip file.                                                      | False    |
| `options.root`           | String | Path where you want the launcher to work in.  like `C:/Users/user/AppData/Roaming/.mc`    | True     |
| `options.os`             | String | windows, osx or linux                                                                     | True     |
| `options.javaPath`       | String | Path to the JRE executable file, will default to `java` if not entered.                   | False    |
| `options.version.number` | String | Minecraft version that is going to be launched.                                           | True     |
| `options.version.type`   | String | Any string. The actual Minecraft launcher uses `release` and `snapshot`.                  | True     |
| `options.version.custom` | String | Name of the jar, json, and folder of the custom client you are launching with. (Optifine) | False    |
| `options.memory.max`     | String | Max amount of memory being used by Minectaft                                              | True     |
| `options.memory.min`     | String | Min amount of memory being used by Minectaft                                              | True     |
| `options.forge`          | String | Path to Universal Forge Jar                                                               | False    |
| `options.customArgs`     | String | Array of custom JVM options                                                               | False    |
| `options.server.host`    | String | Host url to the server, don't include the port                                            | False    |
| `options.server.port`    | String | Port of the host url, will default to `25565` if not entered.                             | False    |
| `options.proxy.host`     | String | Host url to the proxy, don't include the port                                             | False    |
| `options.proxy.port`     | String | Port of the host proxy, will default to `8080` if not entered.                            | False    |
| `options.proxy.username` | String | Username for the proxy.                                                                   | False    |
| `options.proxy.password` | String | Password for the proxy.                                                                   | False    |

##### Note
If you are loading up a client outside of vanilla Minecraft and Forge (Optifine for an example), you'll need to download the needed files yourself.

#### launcher.authenticator Functions 

##### getAuth

| Parameter | Type   | Description                                                  | Required |
|-----------|--------|--------------------------------------------------------------|----------|
| `email`     | String | Email or username                                            | True     |
| `password`  | String | Password for the Mojang account   being used if online mode. | False    |

##### validate

| Parameter    | Type   | Description                                                       | Required |
|--------------|--------|-------------------------------------------------------------------|----------|
| `access_token` | String | Token being checked if it can be used to login with (online mode). | True     |

##### refreshAuth 

| Parameter          | Type   | Description                                                                         | Required |
|--------------------|--------|-------------------------------------------------------------------------------------|----------|
| `access_token`     | String | Token being checked if it can be used to login with (online mode).                  | True     |
| `client_token`     | String | Token being checked if it's the same client that the access_token was created from. | True     |
| `selected_profile` | Object | Json Object that was returned from Mojangs auth api.                                | True     |

#### Events

| Event Name        | Type    | Description                                                                           |
|-------------------|---------|---------------------------------------------------------------------------------------|
| `arguments`       | Object  | Emitted when launch arguments are set for the Minecraft Jar.                          |
| `data`            | Buffer  | Emitted when information is returned from the Minecraft Process                       |
| `close`           | Integer | Code number that is returned by the Minecraft Process                                 |
| `error`           | String  | Emitted when the Minecraft Process errors                                             |
| `package-extract` | null    | Emitted when `clientPackage` finishes being extracted                                 |
| `download`        | String  | Emitted when a file successfully downloads                                            |
| `download-status` | Object  | Emitted when data is received while downloading                                       |
| `debug`           | String  | Emitted when functions occur, made to help debug if errors occur                      |
#### Client Package Function

Client Packages allow the client to run offline on setup. This function should be used outside the actual launcher.
this function is in the `handler` component.

##### makePackage

| Parameter  | Type   | Description                                                           | Required |
|------------|--------|-----------------------------------------------------------------------|----------|
| `versions` | Array  | Array of the versions being downloaded and being made into a package. | True     |
| `os`       | String | OS that the package will be loaded on. OS specific natives need this. | True     |

### Other Examples

##### Using Validate and Refresh

```javascript
let auth = require("pathToUserAuthJson.json");

const validateCheck = await launcher.authenticator.validate(auth.access_token);
if(!validateCheck) {
    auth = await launcher.authenticator.refreshAuth(auth.access_token, auth.client_token, auth.selected_profile);
}
launcher.core({
    authorization: auth,
    clientPackage: null,
    root: "directory",
    os: "windows",
    version: {
        number: "1.13.2",
        type: "MCC-Launcher"
    },
    memory: {
        max: "500",
        min: "100"
    }
});
```

##### Using With Forge

```js
launcher.authenticator.getAuth("email", "password").then(auth => {
    launcher.core({
        authorization: auth,
        clientPackage: null,
        root: "C:/Users/user/AppData/Roaming/.mc",
        forge: "C:/Users/user/Desktop/forge.jar",
        os: "windows",
        version: {
            number: "1.12.2", // needs to be the same as the Forge version
            type: "MCC-Launcher" 
        },
        memory: {
            max: "500",
            min: "100"
        }
    });
});
```


#### What should it look like running from console?

![gif](https://pierce.is-serious.business/7d91a7.gif)