Whitelist command for everyone!

#!/bin/bash
# Start the minecraft server.

rm -f nohup.out
nohup java -Xmx1024M -Xms1024M -jar minecraft_server.1.21.1.jar nogui &


server_pid=$!

# script that allows normal players to add players to the whitelist
./whitelist.sh "$server_pid" &
whitelist_scripting=$!

#!/bin/bash

# Allows every player to whitelist someone new.

server_pid=$1
info_msg="Invite players by typing [ !whitelist playername ] in chat."
spam_msg="Give it a moment before inviting another player."
wl_response_exists_msg="This player is already on the whitelist."
wl_response_added_msg="Player successfully invited!"
cooldown_file="player_cooldowns.txt"
wl_log="whitelist_log.txt"

rm -f $cooldown_file
rm -f $wl_log

# Send a command to the minecraft server.
rcon() {
  mcrcon -H 127.0.0.1 -P 25575 -p "not123456" "$1"
}

# Function to add a player to the cooldown file to prevent spam
add_to_cooldown() {
  player_name="$1"

  current_time=$(date +%s)
  echo "$player_name $current_time" >> "$cooldown_file"
}

# Function to check if a player is on cooldown
is_on_cooldown() {
  player_name="$1"
  cooldown_seconds=60

  last_command_time="$(grep "$player_name " "$cooldown_file" | tail -n 1 | awk '{print $2}')"
  if [[ $last_command_time ]]; then
    elapsed_seconds=$(($(date +%s) - last_command_time))
    if [[ $elapsed_seconds -lt $cooldown_seconds ]]; then
      return 0 # Player is still on cooldown
    else
      return 1 # Player is not on cooldown anymore
    fi
  else
    return 1 # Player is not on cooldown
  fi
}

# Wait for the server to start up completely
sleep 30

sleep_duration=10
nohub_len=$(wc -l < nohup.out)
while ps -p "$server_pid" > /dev/null; do
new_nohub_len=$(wc -l < nohup.out)
line_count=$((new_nohub_len - nohub_len))
unread_lines=$(tail -n $line_count nohup.out)

while read -r line; do
  # Check if a player just joined the server
  if [[ $line =~ ^\[[​0-9]{2}:[​0-9]{2}:[​0-9]{2}\]\ \[​Server\ thread/INFO\]:\ ([​A-Za-z0-9]+)\ joined\ the\ game$ ]]; then
    player_subject="${BASH_REMATCH[​1]}"
    rcon "tell $player_subject $info_msg"
  fi

  # Check if a player wants to add someone to the whitelist
  if [[ $line =~ ^\[[​0-9]{2}:[​0-9]{2}:[​0-9]{2}\]\ \[​Server\ thread/INFO\]:\ \<([​A-Za-z0-9]+)\>\ \!whitelist\ ([​A-Za-z0-9]+)$ ]]; then
    player_subject="${BASH_REMATCH[​1]}"
    player_object="${BASH_REMATCH[​2]}"

    # Check for spamming the whitelist command
    if is_on_cooldown "$player_subject"; then
      rcon "tell $player_subject $spam_msg"
    else

      # Check if the player is already whitelisted
      if [[ -n "$(grep " \"name\": \"$player_object\"" whitelist.json)" ]]; then
        rcon "tell $player_subject $wl_response_exists_msg"
      else
        rcon "whitelist add $player_object"
        rcon "tell $player_subject $wl_response_added_msg"

        # Add the player to the cooldown file
        add_to_cooldown "$player_subject"

        # Save who added whom to a file
        echo "$player_subject added $player_object to the whitelist" >> $wl_log
      fi
    fi
  fi
done <<< "$unread_lines"

nohub_len="$new_nohub_len"

sleep $sleep_duration
done