#!/usr/bin/env bash
DOWNLOAD_URL="https://discord.com/api/download?platform=linux&format=tar.gz" 
INSTALL_DIR="$HOME/src/Discord"

update(){
    pidof Discord > /dev/null 2>&1 && pkill Discord
    curl -L "$DOWNLOAD_URL" > /tmp/discord.tar.gz &&
        rm -rf "$INSTALL_DIR" &&
        tar -xzf /tmp/discord.tar.gz -C "$HOME/src"
}


# check for updates
if [ -n "$1" ]; then
    case "$1" in
        "update")
            echo "Updating Discord"
            update
            ;;
        *)
            echo "Unknown argument. Usage $0 [update]"
            exit 1
            ;;
    esac
else
    # install if not installed
    [ -x "$INSTALL_DIR/Discord" ] || {
        echo "Installing Discord"
        update
    }

    # start discord
    "$INSTALL_DIR/Discord" > /dev/null 2>&1 & disown
fi