#!/bin/bash
#
# Backup a site.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public
# License along with this program.  If not, see
# <http://www.gnu.org/licenses/>.

# Load.
source $APP_BASE/lib/hydra/functions || exit 1
hydra_config_load

# Basic parameters.
SITES="/var/sites"
SITE="$1"
PACK="$1.tar.bz2"
DATE="`date +%Y%m%d`"
DEST="$SITES/backups/site/$SITE/`facter hostname`/$DATE"

# Syntax check.
if [ -z "$SITE" ]; then
  hydra_action_usage
  exit 1
fi

# Determine site location.
if [ "$SITE" == "git" ] && [ "$SITE" == "svn" ]; then
  LOCATION="/var"
else
  LOCATION="$SITES"
fi

# Set backups user.
if hydra_check_user backups; then
  BACKUPS_USER="backups"
else
  BACKUPS_USER="root"
fi

# Set backups group.
if hydra_check_group backups; then
  BACKUPS_GROUP="backups"
else
  BACKUPS_GROUP="root"
fi

# Create folder
mkdir -p $DEST
cd $DEST

# Password setup
if [ ! -e "$SITES/backups/site/$SITE/.htpasswd" ]; then
  touch $SITES/backups/site/$SITE/.htpasswd
  chmod 640 $SITES/backups/site/$SITE/.htpasswd
  chown root.$BACKUPS_GROUP $SITES/backups/site/$SITE/.htpasswd
fi

# Access setup
if [ ! -e "$SITES/backups/site/$SITE/.htaccess" ]; then
  cat > $SITES/backups/site/$SITE/.htaccess <<-EOF
AuthType Basic
AuthName "Backup $SITE"
AuthUserFile $SITES/backups/site/$SITE/.htpasswd
Require valid-user
EOF
fi

# Backup site
if [ -d "$SITES/$SITE" ]; then
  echo "Backing up site folder..."
  tar jcvf $PACK $LOCATION/$SITE
  md5sum $PACK  > $PACK.md5
  sha1sum $PACK > $PACK.sha1
  chown root.$BACKUPS_GROUP $PACK*
  chmod 640 $PACK*
  echo "Saved $DEST/$PACK"
fi

# Backup database
if [ -d "/var/lib/mysql/$SITE" ]; then
  echo "Backing up database $SITE..."
  mysqldump $SITE > $SITE.sql
  bzip2 $SITE.sql
  md5sum $SITE.sql.bz2 > $SITE.sql.bz2.md5
  sha1sum $SITE.sql.bz2 > $SITE.sql.bz2.sha1
  chown root.$BACKUPS_GROUP $SITE.sql*
  chmod 640 $SITE.sql*
  echo "Saved $DEST/$SITE.sql.bz2"
else
  echo "Database not found, please backup it manually"
fi