# How to Contribute

This is a technical guide that helps Kotlin and Java developers understand how SkyHanni works, and provides the first
steps for new Forge developers to take.

# Set up the development environment

When making changes to the code, it is recommended to use an IDE for live debugging and testing.
This tutorial explains how to set up the development environment for SkyHanni.
We use [IntelliJ](https://www.jetbrains.com/idea/) as an example.

## Download IntelliJ

- Download IntelliJ from the [JetBrains Website](https://www.jetbrains.com/idea/download/).
    - Use the Community Edition. (Scroll down a bit.)

## Cloning the project

- Create an account on GitHub
    - Go to https://github.com/hannibal002/SkyHanni
    - Click on the fork button to create a fork.
        - Leave the settings unchanged
        - Click on `create fork`
    - Open IntelliJ
        - Link the GitHub account with IntelliJ.
        - Install Git in IntelliJ.
        - In IntelliJ, go to `new` → `project from version control`.
        - Select `SkyHanni` from the list.
        - Open the project.

## Setting up IntelliJ

SkyHanni's Gradle configuration is very similar to the one used in **NotEnoughUpdates**; just follow this guide:
https://github.com/NotEnoughUpdates/NotEnoughUpdates/blob/master/CONTRIBUTING.md

# Software Used in SkyHanni

## Core

SkyHanni is a Forge mod for Minecraft 1.8.9, written in [Kotlin](https://kotlinlang.org/)
and [Java](https://www.java.com/en/).

We use a [Gradle configuration](https://gradle.org/) to build the mod,
written in [Kotlin DSL](https://docs.gradle.org/current/userguide/kotlin_dsl.html):
[build.gradle.kts](https://github.com/hannibal002/SkyHanni/blob/beta/build.gradle.kts)

This start script will automatically download all required libraries.

## NotEnoughUpdates

SkyHanni requires NEU.
We use NEU to get auction house and bazaar price data for items and to read
the [NEU Item Repo](https://github.com/NotEnoughUpdates/NotEnoughUpdates-REPO) for item internal names, display names
and recipes.

For more information, see https://github.com/NotEnoughUpdates/NotEnoughUpdates

## Config

SkyHanni uses the config system from NEU.

For more information, see https://github.com/NotEnoughUpdates/MoulConfig

## Mixin

A system to inject code into the original Minecraft code.
This library is not part of SkyHanni itself; it comes preinstalled with Forge.

For more information, see https://github.com/SpongePowered/Mixin.

## Repo

SkyHanni uses a repo system to easily change static variables without the need for a mod update.
The repo is located at https://github.com/hannibal002/SkyHanni-REPO.
A copy of all files in the repo is stored for every SkyHanni user under `.minecraft\config\skyhanni\repo`.
On every game start, the copy gets updated (if outdated and if not manually disabled).
When working with the repo, it is recommended to disable the manual repo update to prevent overriding your local changes
accidentally.

# Coding Styles and Conventions

- Follow the [Hypixel Rules](https://hypixel.net/rules).
- Use the coding conventions for [Kotlin](https://kotlinlang.org/docs/coding-conventions.html)
  and [Java](https://www.oracle.com/java/technologies/javase/codeconventions-contents.html).
- Do not copy features from other mods. Exceptions:
    - Paid only mods.
    - Mods that have reached the end of life. (Rip SBA, Dulkir and Soopy)
    - The mod has, according to Hypixel rules, illegal features ("cheat mod").
    - If you can improve the existing feature in a meaningful way.
- All classes should be written in Kotlin, with a few exceptions:
    - Config files in `at.hannibal2.skyhanni.config.features`
    - Mixin classes in `at.hannibal2.skyhanni.mixins.transformers`
    - Java classes that represent JSON data objects in `at.hannibal2.skyhanni.utils.jsonobjects`
- Please use the existing event system, or expand on it. Do not use Forge events.
    - (We inject the calls with Mixin)
- Please use existing utils methods.
- We try to avoid calling the NEU code too often.
    - (We plan to remove NEU as a dependency in the future.)
- We try not to use Forge-specific methods if possible.
    - (We plan to switch to Fabric and Minecraft 1.20 in the future.)

# Additional Useful Developement Tools

## DevAuth

[DevAuth](https://github.com/DJtheRedstoner/DevAuth) is a tool that allows logging in to a Minecraft account while
debugging in IntelliJ. This is very useful for coding live on Hypixel without the need to compile a jar, put it into the
`mods` folder, and start the Minecraft launcher manually.

- The library is already downloaded by Gradle.
- Create the config folder (Windows only). For other OSes, use the guide from DJtheRedstoner.
    - Navigate to `C:\Users\<your username>`
    - Create a new folder `.devauth`
    - Navigate to `C:\Users\<your username>\.devauth`
    - Create a new file `config.toml`
    - Paste this text into the file: (Don't change anything.)

```
defaultEnabled = true

defaultAccount = "main"

[accounts.main]
type = "microsoft"
```

- Start Minecraft inside IntelliJ normally.
    - Click on the link in the console and verify with a Mojang account.
    - The verification process will reappear every few days (after the session token expires).

## Hot Swap

Hot Swap allows reloading edited code while debugging, removing the need to restart the whole game every time.

We use [dcevm](https://dcevm.github.io/) and the IntelliJ
Plugin [HotSwap Agent](https://plugins.jetbrains.com/plugin/9552-hotswapagent) to quickly reload code changes.

Follow [this](https://forums.Minecraftforge.net/topic/82228-1152-3110-intellij-and-gradlew-forge-hotswap-and-dcevm-tutorial/)
tutorial.