# MarkBot for Discord

A Markov chain bot using markov-strings.

## Usage

1. Train the bot in a lengthy text channel:
    * User: `!mark train`
    * Markbot: `@User, Finished training from past 76394 messages.`
1. Ask the bot to say something:
    * User: `!mark`
    * Markbot: `This Shopko has a Linux release`

## Setup

First, create a [Discord bot application](https://discordapp.com/developers/applications/).

### Windows

#### Windows Requirements

* [Node.js 12.0+ (Current)](https://nodejs.org/en/download/)
  * Installing with build tools is recommended

#### Windows Setup

1. Install Node.js 12.0 or newer.
1. Download this repository using git in a command prompt

    ```cmd
    git clone https://github.com/charlocharlie/markov-discord.git
    ```

    or by just downloading and extracting the [project zip](https://github.com/charlocharlie/markov-discord/archive/master.zip) from GitHub.
1. Open a command prompt in the `markov-discord` folder.

    ```sh
    # Install Windows build tools (if you didn't install build tools with Node)
    npm install --global windows-build-tools
    # NPM install non-development packages
    npm install
    # Build the Typescript
    npm run build
    ```

1. Create a file called `config.json` in the project directory with the contents:

    ```json
    {
      "prefix":"!mark",
      "game":"\"!mark help\" for help",
      "token":"k5NzE2NDg1MTIwMjc0ODQ0Nj.DSnXwg.ttNotARealToken5p3WfDoUxhiH"
    }
    ```

    Feel free to change the command prefix, game display. Add your bot token.
1. Run the bot:

    ```sh
    npm start
    ```

### Debian Linux

#### Debian Requirements

* Node.js 12.0+
* Python 2.7 (for erlpack)
* C++ build tools (for erlpack)

#### Download

```sh
# Clone this repository
git clone https://github.com/charlocharlie/markov-discord.git
cd markov-discord
```

#### Configure

Create a file called `config.json` in the project directory with the contents:

```json
{
  "prefix":"!mark",
  "game":"\"!mark help\" for help",
  "token":"k5NzE2NDg1MTIwMjc0ODQ0Nj.DSnXwg.ttNotARealToken5p3WfDoUxhiH"
}
```

Feel free to change the command prefix, game display. Add your bot token.

#### Install and Run

```sh
# Install Node.js if you haven't already
wget -qO- https://raw.githubusercontent.com/creationix/nvm/v0.33.11/install.sh | bash
nvm install node

# NPM install non-development packages
npm install

# If you run into build errors, install the following packages:
sudo apt-get install python -y
sudo apt-get install build-essential -y

# Build the Typescript
npm run build

# Start the program
npm start
```

### Docker

#### Setup with Docker Hub image

1. Install Docker for your OS.
1. Open a command prompts and run:

    ```sh
    docker pull charlocharlie/markov-discord
    docker run --rm -d charlocharlie/markov-discord:latest
    ```

#### Setup with source

1. Install Docker for your OS.
1. Download this repository using git in a command prompt

    ```sh
    git clone https://github.com/charlocharlie/markov-discord.git
    ```

    or by just downloading and extracting the [project zip](https://github.com/charlocharlie/markov-discord/archive/master.zip) from GitHub.
1. Open a command prompt in the markov-discord folder and run this one-liner:

    ```sh
    docker run --rm -e TOKEN=YOUR.BOT.TOKEN -v config:/usr/src/markbot/config -it $(docker build -q .)
    # Be patient as the build output is suppressed
    ```

## Changelog

### 0.7.3

* Fix crash when fetched messages is empty
* Update docs
* Update dependencies

### 0.7.2

* Fix @everyone replacement

### 0.7.1

* Readme updates
* Config loading fix
* Fix min score
* Add generator options to config
* Document Node 12 update

### 0.7.0

* Convert project to Typescript
* Optimize Docker build (smaller image)
* Load corpus from filesystem to reduce memory load

### 0.6.2

* Fix MarkovDB not loading on boot

### 0.6.1

* Fix bot crashing on scheduled regen

### 0.6.0

* Added Docker deploy functionality.
* Moved config and database to `./config` directory. Existing configs will be migrated.
* Config-less support via bot token located in an environment variable.
* Update dependencies.
* Change corpus regen time to 4 AM.

### 0.5.0

* Fixed bug where `!mark help` didn't work.
* Only admins can train.
* The bot responds when mentioned.
* The bot cannot mention @everyone.
* Added version number to help.
* Added `!mark tts` for a quieter TTS response.
* Readme overhaul.
* Simpler config loading.

### 0.4.0

* Huge refactor.
* Added `!mark debug` which sends debug info alongside the message.
* Converted the fetchMessages function to async/await (updating the requirement to Node.js 8).
* Updated module versions.
* Added faster unique-array-by-property function
* Added linting and linted the project.

### 0.3.0

* Added TTS support and random message attachments.
* Deleted messages no longer persist in the database longer than 24 hours.

### 0.2.0

* Updated training algorithm and data structure.

## Thanks

Thanks to [BotMaker-for-Discord](https://github.com/CorySanin/BotMaker-for-Discord) which I used as a reference when during development.