#!/bin/bash

BOT_TOKEN="xxx"

FTP_HOST="xxx"
FTP_USER="xxx"
FTP_PASS="xxx"

# Other Variables (do not modify)
DATE_FORMAT="%F_%H-%M-%S"
TIMESTAMP=$(date +$DATE_FORMAT)
ARCHIVE_FILE_NAME=$TIMESTAMP.tar

SERVERS=($(ls /home/servers))

execute-command () {
  local SCREEN_NAME=$1
  local COMMAND=$2

  if [[ $SCREEN_NAME != "" ]]; then
    screen -S $SCREEN_NAME -p 0 -X stuff "$COMMAND$(printf \\r)"
  fi
}

send() {
  local MESSAGE=$1

  curl -s \
  -X POST \
  https://api.telegram.org/bot${BOT_TOKEN}/sendMessage \
  -d text="$MESSAGE" \
  -d chat_id=-246797235
}

for SERVER in "${SERVERS[@]}"
do
  if [[ $SERVER == *"-Test"* ]]; then
    continue;
  fi

  echo "Start backup $SERVER";

  execute-command $SERVER "save-all"
  sleep 15s
  execute-command $SERVER "save-off"

  START_TIME=$(date +"%s")

  BACKUP_DIR="/home/backups/$SERVER"

  mkdir -p $BACKUP_DIR

  ARCHIVE_PATH="$BACKUP_DIR/$ARCHIVE_FILE_NAME"
  SERVER_ROOT="/home/servers/$SERVER"

  if tar -cf $ARCHIVE_PATH -C $SERVER_ROOT world plugins/WorldGuard/worlds; then
        sync

        END_TIME=$(date +"%s")

        execute-command $SERVER "save-on"
        execute-command $SERVER "save-all"

        TIME_DELTA=$((END_TIME - START_TIME))

        echo "World archived in $TIME_DELTA sec"

        START_TIME=$(date +"%s")

        if curl -T $ARCHIVE_PATH ftp://${FTP_USER}:${FTP_PASS}@${FTP_HOST}/maps/${SERVER}/${ARCHIVE_FILE_NAME}; then
            rm -rf $ARCHIVE_PATH
        else
            send "Failed to upload backup ${SERVER}!"
        fi

        END_TIME=$(date +"%s")

        TIME_DELTA=$((END_TIME - START_TIME))

        echo "Archive sended in $TIME_DELTA sec"
  else
      execute-command $SERVER "save-on"
      execute-command $SERVER "save-all"

      send "Failed to create backup ${SERVER}!"
  fi

done