#! /bin/bash

base_dbconfig_data_dir="/usr/share/dbconfig-common/data"

install_upgrade_to() {
  upgrade_file="$base_dbconfig_data_dir/libreplan/upgrade/pgsql/$1"
  echo "Applying SQL statements to upgrade to version $1..."
  push_sql_from_file_as_user $upgrade_file $navalplan_user $navalplan_db
}

push_sql_from_file_as_user() {
  filepath=$1
  username=$2
  database=$3
  psql -U $username -h $database_host \
    $database < $filepath > /dev/null 2>&1
}

execute_sql_as_admin() {
  sql=$1
  su - -s /bin/sh $navalplan_admin_user -c "psql -c \"$sql\"" > /dev/null
}

if [[ $1 = upgrade && -r /etc/dbconfig-common/libreplan.conf
  && -r /etc/dbconfig-common/navalplan.conf ]]
then
  old_version=$2

	. /etc/dbconfig-common/libreplan.conf
  libreplan_user=${dbc_dbuser}
  libreplan_passwd=${dbc_dbpass}
  libreplan_db=${dbc_dbname}

	. /etc/dbconfig-common/navalplan.conf
  navalplan_user=${dbc_dbuser}
  navalplan_passwd=${dbc_dbpass}
  navalplan_db=${dbc_dbname}
  navalplan_admin_user=${dbc_dbadmin}

	if [ -z "${dbc_dbhost}" ] ; then
		database_host='localhost'
	else
		database_host=${dbc_dbhost}
	fi

  export PGPASSFILE=`mktemp`
  chmod 600 $PGPASSFILE

  old_db_dump=`mktemp`
  chown $navalplan_admin_user:root $old_db_dump;
  chmod 660 $old_db_dump;

  # Stop tomcat to flush active connections.
  if [ -x /etc/init.d/tomcat6 ] ; then
    if [ -x "$(which invoke-rc.d 2> /dev/null)" ] ; then
      invoke-rc.d tomcat6 stop
    else
      /etc/init.d/tomcat6 stop
    fi
  fi

  echo "Dropping newly created empty database...";
  execute_sql_as_admin "DROP DATABASE $libreplan_db;"

  echo "Trying to apply upgrades to old database..."

  echo "*:*:*:*:$navalplan_passwd" > $PGPASSFILE

  dpkg --compare-versions $old_version "<<" "1.0.0-1"
  if [ $? -eq 0 ]; then
    install_upgrade_to "1.0.0"
  fi
  dpkg --compare-versions $old_version "<<" "1.1.0-1"
  if [ $? -eq 0 ]; then
    install_upgrade_to "1.1.0"
  fi
  dpkg --compare-versions $old_version "<<" "1.2.0-1"
  if [ $? -eq 0 ]; then
    install_upgrade_to "1.2.0"
  fi

  echo "Dumping old database..."
  su - -s /bin/sh $navalplan_admin_user -c "pg_dump $navalplan_db >> $old_db_dump" > /dev/null

  echo "Creating and populating new database...";
  execute_sql_as_admin "CREATE DATABASE $libreplan_db;"
  execute_sql_as_admin "GRANT ALL PRIVILEGES ON DATABASE $libreplan_db TO $libreplan_user;"
  execute_sql_as_admin "ALTER DATABASE $libreplan_db OWNER TO $libreplan_user;"
  echo "*:*:*:*:$libreplan_passwd" > $PGPASSFILE
  push_sql_from_file_as_user $old_db_dump $libreplan_user $libreplan_db

  rm $PGPASSFILE $old_db_dump

fi
#DEBHELPER#