#!/bin/bash

###########################
####### LOAD CONFIG #######
###########################

while [ $# -gt 0 ]; do
  case $1 in
    -c)
      if [ -r "$2" ]; then
        source "$2"
        shift 2
      else
        ${ECHO} "Unreadable config file \"$2\"" 1>&2
        exit 1
      fi
      ;;
    *)
      ${ECHO} "Unknown Option \"$1\"" 1>&2
      exit 2
      ;;
  esac
done

if [ $# = 0 ]; then
  if [ -f "/opt/xsg/etc/my_backup.config" ]; then
    source "/opt/xsg/etc/my_backup.config"
  fi
fi;

###########################
#### PRE-BACKUP CHECKS ####
###########################
# Make sure we're running as the required backup user
if [ "$BACKUP_USER" != "" -a "$(id -un)" != "$BACKUP_USER" ]; then
	echo "This script must be run as $BACKUP_USER. Exiting." 1>&2
	exit 1;
fi;

###########################
### INITIALISE DEFAULTS ###
###########################
if [ ! $HOSTNAME ]; then
	HOSTNAME="localhost"
fi;

if [ ! $USERNAME ]; then
	USERNAME="root"
fi;

###########################
#### START THE BACKUPS ####
###########################
FINAL_BACKUP_DIR=$BACKUP_DIR"`date +\%Y-\%m-\%d`/"

echo "Making backup directory in $FINAL_BACKUP_DIR"

if ! mkdir -p $FINAL_BACKUP_DIR; then
	echo "Cannot create backup directory in $FINAL_BACKUP_DIR. Go and fix it!" 1>&2
	exit 1;
fi;

#######################
### GLOBALS BACKUPS ###
#######################
echo -e "Performing dump backup"
echo -e "----------------------\n"

if [ $ENABLE_DUMP_BACKUPS = "yes" ]
then
  echo -e "Dump backup\n"

  DATABASES=`sudo -H mysql -e "SHOW DATABASES;" | tr -d "| " | grep -v Database`

  for DATABASE in $DATABASES; do
    DUMP=1

    for i in "${EXCLUDE_DATABASES[@]}"
    do
      if [ "$i" == "$DATABASE" ] ; then
        echo -e "\tDatabase Excluded - ${DATABASE}"
        DUMP=0
        break
      fi
    done

    if [ "$DUMP" != "0" ]; then
      echo -e "\tDumping Database: ${DATABASE}"
      mysqldump --no-create-db --events --routines --triggers --compact ${DATABASE} --result-file ${FINAL_BACKUP_DIR}/${DATABASE}_dump.sql

      if [ "$ENABLE_DUMP_SCHEMA_BACKUPS" = "yes" ]; then
        mysqldump --no-create-db --no-data --events --routines --triggers --compact ${DATABASE} --result-file ${FINAL_BACKUP_DIR}/${DATABASE}_schema.sql
      fi
    fi

  done
else
	echo "None"
fi

###########################
###### FULL BACKUPS #######
###########################

if [ "$ENABLE_GLOBALS_BACKUPS" = "yes" ]; then
  innobackupex --compact --rsync --no-timestamp ${FINAL_BACKUP_DIR}/innobackupexec/
fi

echo -e "\nAll database backups complete!"
