#!/bin/bash
# Bootstrap a Drupal project
#
# Copyright (C) 2017  Antonio Ospite <ao2@ao2.it>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 2 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

set -e

usage() {
  cat <<EOF
usage: drin $(basename "$0" .sh) [--devel|--overwrite-profile|-h|--help]

Bootstrap a Drupal project, using settings from a 'bootstrap.conf' file.

Options:
  --devel              install drupal/devel and use a settings.local.php file
  --overwrite-profile  allow overwriting the current installation profile
  -h, --help           display this usage message and exit

EOF
}

while [ $# -gt 0 ];
do
  case "$1" in
    -h|--help)
      usage
      exit 0
      ;;
    --devel)
      DEVEL_MODE="true"
      ;;
    --overwrite-profile)
      OVERWRITE_PROFILE="true"
      ;;
    -*)
      echo "Error: Unknown option '${1}'" 1>&2
      ;;
  esac
  shift
done

[ -f "bootstrap.conf" ] || { echo "Aborting, run this command from the Drupal project directory." 1>&2; exit 1; }

# shellcheck disable=SC1091
. bootstrap.conf

declare -p DB_NAME
declare -p DB_USER
declare -p DB_PASS

declare -p ACCOUNT_NAME
declare -p ACCOUNT_PASS
declare -p ACCOUNT_MAIL

declare -p SITE_NAME
declare -p SITE_MAIL
declare -p SITE_BASE_PATH

declare -p TRUSTED_HOSTS

declare -p WEB_SERVER_GROUP

[ "x$INSTALLATION_PROFILE" = "x" ] && { echo "INSTALLATION_PROFILE not specified, using the \"standard\" profile!"; INSTALLATION_PROFILE="standard"; }

if [ "$MYSQL_PASSWORDLESS_ACCESS" = true ];
then
  MYSQL_SU_USER="${USER}"
else
  # XXX Deprecate MYSQL_ROOT_PASSWORD, it will be removed eventually,
  # but for now add some backwards compatibility mapping.
  if [ "x$MYSQL_ROOT_PASSWORD" != "x" ];
  then
    echo "WARN: MYSQL_ROOT_PASSWORD is deprecated, use MYSQL_SU_USER and MYSQL_SU_PASSWORD" 1>&2
    MYSQL_SU_USER="root"
    MYSQL_SU_PASSWORD="$MYSQL_ROOT_PASSWORD"
  fi

  if [ "x$MYSQL_SU_USER" = "x" ];
  then
    echo "Aborting, for password regulated access specify MYSQL_SU_USER in bootstrap.conf" 1>&2
    exit 1
  fi

  if [ "x$MYSQL_SU_PASSWORD" = "x" ];
  then
    read -r -s -p "MySQL password for \"${MYSQL_SU_USER}\": " MYSQL_SU_PASSWORD
    echo
  fi

  DRUSH_DB_SU_CREDENTIALS=(--db-su-pw'='"${MYSQL_SU_PASSWORD}")
fi

DRUSH_DB_SU_CREDENTIALS+=(--db-su'='"${MYSQL_SU_USER}")

WEB_ROOT="${PWD}/web"

command -v composer &> /dev/null || { echo "Aborting, 'composer' not available." 1>&2; exit 1; }
command -v git &> /dev/null || { echo "Aborting, 'git' not available." 1>&2; exit 1; }

[ -d "$WEB_ROOT" ] || composer install

DRUSH="${PWD}/vendor/bin/drush"
DRUPAL_CONSOLE="${PWD}/vendor/bin/drupal"

[ -x "$DRUSH" ] || { echo "Aborting, '$DRUSH' not available." 1>&2; exit 1; }
[ -x "$DRUPAL_CONSOLE" ] || { echo "Aborting, '$DRUPAL_CONSOLE' not available." 1>&2; exit 1; }

# This becomes unnecessary if the installation profile gets pulled in by
# composer.json, like suggested in
# https://github.com/drupal-composer/drupal-project/issues/249
if ! echo "$INSTALLATION_PROFILE" | grep -q -E "^(minimal|standard)$";
then
  if [ -d "${WEB_ROOT}/profiles/${INSTALLATION_PROFILE}" ] && [ "$OVERWRITE_PROFILE" != "true" ];
  then
    echo "Installation profile '$INSTALLATION_PROFILE' already there." 1>&2
    echo "Use --overwrite-profile to copy over it." 1>&2
    exit 1
  else
    cp -a "$INSTALLATION_PROFILE" "${WEB_ROOT}/profiles"
  fi
fi

pushd "$WEB_ROOT"

# Update the install_profile if it's already there
if grep -q "^\\\$settings\['install_profile'\] =" sites/default/settings.php;
then
  chmod 755 sites/default
  chmod 644 sites/default/settings.php
  sed -i -e "s/^\(\$settings\['install_profile'\]\) = '[^']*';/\1 = '$INSTALLATION_PROFILE';/g" sites/default/settings.php
  chmod 444 sites/default/settings.php
  chmod 555 sites/default
fi

$DRUSH --verbose --yes \
  site-install \
  "${DRUSH_DB_SU_CREDENTIALS[@]}" \
  --db-url="mysql://${DB_USER}:${DB_PASS}@localhost/${DB_NAME}" \
  --site-name="$SITE_NAME" \
  --site-mail="$SITE_MAIL" \
  --account-name="$ACCOUNT_NAME" \
  --account-pass="$ACCOUNT_PASS" \
  --account-mail="$ACCOUNT_MAIL" \
  "$INSTALLATION_PROFILE"

if $DRUSH pm-info --fields=status locale | grep -q enabled;
then
  # This is necessary for multi-language sites, it fixes some issues like:
  #   "The Translation source field needs to be installed."
  $DRUSH --yes entity-updates

  # Update translations of contrib modules
  $DRUSH --yes locale-update
fi

# This fixes permissions when installing under $HOME/public_html/
chmod 775 sites/default/files
sudo chgrp -R "$WEB_SERVER_GROUP" sites/default/files

[ -d ../config/sync ] && sudo chgrp -R "$WEB_SERVER_GROUP" ../config/sync

# Enable clean URLs
sed -i "s@\(# \)\{0,1\}RewriteBase .*\$@RewriteBase ${SITE_BASE_PATH}@" .htaccess

chmod 755 sites/default
chmod 644 sites/default/settings.php

# Add some basic settings to settings.php
if ! grep -q "^\\\$settings\['trusted_host_patterns'\] =" sites/default/settings.php;
then
  echo "\$settings['trusted_host_patterns'] = [" >> sites/default/settings.php
  for host in "${TRUSTED_HOSTS[@]}"
  do
    echo "  '^${host}\$'," >> sites/default/settings.php
  done
  echo "];" >> sites/default/settings.php
fi

if [ "$DEVEL_MODE" = "true" ];
then
  # NOTE: don't run composer under web/ but in the project dir
  composer --working-dir=../ require drupal/devel
  $DRUSH --yes en devel

  if [ ! -e sites/default/settings.local.php ];
  then
    cp sites/example.settings.local.php sites/default/settings.local.php

    # Disable some overly permissive settings
    sed -i -e "s/^\(\$settings\['rebuild_access'\]\).*$/\1 = FALSE;/g" sites/default/settings.local.php
    sed -i -e "s/^\(\$settings\['skip_permissions_hardening'\]\).*$/\1 = FALSE;/g" sites/default/settings.local.php

    chmod 444 sites/default/settings.local.php
  fi

  if ! grep -q "^include \$app_root . '/' . \$site_path . '/settings.local.php';" sites/default/settings.php;
  then
    echo "include \$app_root . '/' . \$site_path . '/settings.local.php';" >> sites/default/settings.php
  fi
fi

chmod 444 sites/default/settings.php
chmod 555 sites/default

# If using a git checkout of Drupal core, set up a diff alias.
#
# This is useful because the Automated Test infrastructure of drupal.org does
# not expect patches to be created from a split core directory.
if [ -d core/.git ];
then
  git -C core/ config --local alias.core-diff "diff --src-prefix=a/core/ --dst-prefix=b/core/"
  echo "Added a 'git core-diff' command to the drupal/core repository clone."
  echo "This command helps creating core patches ready for upstream."
fi

popd