#!/bin/bash
#
# Hidden services backup restoration.
#
# 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

# Parameters.
DATE="`date +%Y%m%d`"
HIDDEN_DIR="/var/lib/tor/hidden"

# Check restore strategy.
if [ "$1" == "localhost" ] || [ "$1" == "`facter hostname`" ]; then
  hydra_backup_environment_local
else
  hydra_backup_environment_remote $1 restore
fi

# Check if folder exist on the backup.
if [ ! -d "$RESTOREDIR/$HIDDEN_DIR" ]; then
  echo "Hidden services folder does not exist: $RESTOREDIR/$HIDDEN_DIR"
  exit 1
fi

# Set git user.
if hydra_check_user debian-tor; then
  HIDDEN_USER="debian-tor"
else
  HIDDEN_USER="root"
fi

# Set git group.
if hydra_check_group debian-tor; then
  HIDDEN_GROUP="debian-tor"
else
  HIDDEN_GROUP="root"
fi

# TODO: Backup it?
#hydractl backup-hidden

# Restore hidden service folder from backup.
#
# Symlink creation on site instances like drupal should be done
# already by backup-restore-site.
for folder in `ls $RESTOREDIR/$HIDDEN_DIR`; do
  if [ -e "$HIDDEN_DIR/$folder/hostname" ]; then
    # A hidden service already exists
    if ! diff "$HIDDEN_DIR/$folder/hostname" "$RESTOREDIR/$HIDDEN_DIR/$folder/hostname" &> /dev/null; then
      # They're different hidden services!
      echo "Hidden service $hidden already exists on $HIDDEN_DIR/$folder and differs from backup!"
      echo "Please fix this conflict manually and restore backups again."
    else
      echo "Hidden service $hidden already in place, no need to copy."
    fi
  else
    echo "Processing $HIDDEN_DIR/$folder..."
    rm -rf $HIDDEN_DIR/$folder
    cp -a $RESTOREDIR/$HIDDEN_DIR/$folder $HIDDEN_DIR/$folder
  fi
done

# Fix permissions.
chown -R $HIDDEN_USER.$HIDDEN_GROUP $HIDDEN_DIR