UHC world setup

uhc_setup.sh

#!/bin/bash
#Note run with `bash -x ./`... to enable debugging
usage_text="Ultra Hardcore world setup script.
This script will help you prepare a seed for a match of UHC. Then it will help you run it (teams, time markers, and the like). Just run the script, join the server, and go into creative mode.

This script will launch a screen session that will run the server and give you helpers for UHC.
Or you can run the server in your own screen session and specify the screen number with  MC_SERVER_SCREEN_NUM.
Usage: $0
"

    # If any commands in a pipe fail, they all fail.
set -o pipefail

### Options/Flags/Defaults
usage=

while [ $# -ne 0 ] ; do
  case $1 in
  --help | --usage ) shift ; usage=t ;;
  * )
    echo "Unknown option \"$1\""
    echo
    usage=t
    shift
    ;;
  esac
done

if [ "$usage" ] ; then
  echo "${usage_text}"
  exit 2
fi


### Script Body

# `n` helper (newline character)
n=$(echo -e "\r")

start_screen_session() {
  MC_SERVER_SCREEN_NUM=0 screen -S minecraft -d -m

  screen -S minecraft -p 0 -X stuff "java -Xmx1024M -jar minecraft_server.14w11b.jar nogui$n"

  screen -S minecraft -X screen
  screen -S minecraft -p 1 -X stuff "$0$n"

  exec screen -r -S minecraft
}

if [ -z "${MC_SERVER_SCREEN_NUM}" ] ; then
  # This execution will be replaced with a screen session that runs:
  # 0. The minecraft server
  # 1. This uhc_script
  start_screen_session
fi

mc_command() {
  screen -S minecraft -p $MC_SERVER_SCREEN_NUM -X stuff "$*$n"
}

x=-1000
y=128
z=-1000

load_region() {
  mc_command time set day
  mc_command gamerule doDaylightCycle false

  mc_command tp @r $x $y $z 0 -90
  x=$((x + 400))
  if [[ $x -gt 1000 ]] ; then
    x=-1000
    z=$((z + 400))
    if [[ $z -gt 1000 ]] ; then
      z=-1000
      next_command="add_walls"
    fi
  fi
}

add_walls() {
  # This builds the walls in 1x255x14 chunks.
  # There will be a bit of spill-over since 1000/14 will have a remander.
  y1=260
  x1=-1000
  for x1 in -1000 1000 ; do
    for z1 in {-1000..1000..14} ; do
      mc_command tp @r $x1 $y1 $z1
      mc_command fill $x1 0 $z1 $x1 255 $(( z1 + 14 )) minecraft:bedrock
    done
  done

  for z1 in -1000 1000 ; do
    for x1 in {-1000..1000..14} ; do
      mc_command tp @r $x1 $y1 $z1
      mc_command fill $x1 0 $z1 $(( x1 + 14 )) 255 $z1 minecraft:bedrock
    done
  done
  next_command="set_spawn"
}

auto_load_and_walls() {
  load_region
  while [ "$next_command" == "load_region" ] ; do
    sleep 60 # 60 second delay between "jumps" to let the map load.
    load_region
  done
  add_walls
  exit
}

set_spawn() {
  mc_command 'tellraw @a {"text":"","extra":[{"text":"Do not forget to ","color":"white"},{"text":"set world spawn","color":"blue","clickEvent":{"action":"run_command","value":"/setworldspawn"}},{"text":".","color":"white"}]}'
  next_command="prepare_teams"
}

prepare_teams() {
  mc_command gamerule doDaylightCycle false
  mc_command time set day
  mc_command scoreboard objectives add Health health
  mc_command scoreboard objectives setdisplay list Health


  mc_command scoreboard teams add red
  mc_command scoreboard teams option red color red

  mc_command scoreboard teams add blue
  mc_command scoreboard teams option blue color blue

  mc_command scoreboard teams add green
  mc_command scoreboard teams option green color green

  mc_command scoreboard teams join red @r[team=,c=4]
  mc_command scoreboard teams join blue @r[team=,c=4]
  mc_command scoreboard teams join green @r[team=,c=4]
  next_command="start_uhc"
}

start_uhc() {
  mc_command time set day

  mc_command spreadplayers 0 0 400 999 true @a
  mc_command gamerule naturalRegeneration true
  mc_command effect @a 10 1 255 true # Regenerate players' health
  sleep 1
  mc_command effect @a 23 1 255 true # Saturate players

  mc_command say "30 seconds" ; sleep 20
  mc_command say "10 seconds" ; sleep 5
  mc_command say "5..." ; sleep 1
  mc_command say "4..." ; sleep 1
  mc_command say "3..." ; sleep 1
  mc_command say "2..." ; sleep 1
  mc_command say "1..." ; sleep 1

  mc_command gamerule naturalRegeneration false
  mc_command gamerule doDaylightCycle true
  mc_command say "Go!"

  sleep $(( 60 * 20 )) ; mc_command say "20 Minute Mark"
  sleep $(( 60 * 20 )) ; mc_command say "40 Minute Mark"
  sleep $(( 60 * 20 )) ; mc_command say "60 Minute Mark"
  sleep $(( 60 * 20 )) ; mc_command say "80 Minute Mark"
  sleep $(( 60 * 20 )) ; mc_command say "100 Minute Mark"
  sleep $(( 60 * 20 )) ; mc_command say "120 Minute Mark"
  sleep $(( 60 * 20 )) ; mc_command say "140 Minute Mark"
  sleep $(( 60 * 20 )) ; mc_command say "160 Minute Mark"
  sleep $(( 60 * 20 )) ; mc_command say "180 Minute Mark, finish it already!"
}

show_options() {
  echo ""
  echo "== Values =="
  echo "World size: 1000x1000 (fixed)"
  echo "# of teams: 3 (fixed)"
  echo "# of players per teams: 4 (fixed)"
  echo ""
  echo "== Map Prep =="
  echo "load_region) Teleport to $x,$z to load the area."
  echo "add_walls) Create a bedrock wall around the map."
  echo "auto_load_and_walls) Automatically load the map and generate the walls."
  echo "set_spawn) Tell someone in the world to set spawn."
  echo ""
  echo "== Event Prep =="
  echo "prepare_teams) Randomly distribute players into teams."
  echo "start_uhc) Sets UHC rules, starts the countdown, then starts the 20x minute marks."
}


next_command="load_region"
input=
while [[ "$input" -ne "x" ]] ; do
  show_options
  read -p "($next_command) >" input
  if [[ -z "$input" ]] ; then
    input=$next_command
  fi

  case $input in

    load_region ) load_region ;;
    add_walls ) add_walls ;;
    auto_load_and_walls ) auto_load_and_walls ;;
    set_spawn ) set_spawn ;;
    prepare_teams ) prepare_teams ;;
    start_uhc ) start_uhc ;;
    x )
      # exit
      ;;

    * )
      echo "Unknown command $input"
  esac
done