#
# Common variables
#

# Roundcube version
VERSION="1.2.1"

# Package name for Roundcube dependencies
DEPS_PKG_NAME="roundcube-deps"

# Roundcube complete tarball checksum
ROUNDCUBE_SOURCE_SHA256="05c0b17c8951db1d220f2f2186e6981545789da0d084a543e28a7d2511db8302"

# Remote URL to fetch Roundcube source tarball
ROUNDCUBE_SOURCE_URL="https://github.com/roundcube/roundcubemail/releases/download/${VERSION}/roundcubemail-${VERSION}.tar.gz"

# App package root directory should be the parent folder
PKGDIR=$(cd ../; pwd)

#
# Common helpers
#

# Download and extract Roundcube sources to the given directory
# usage: extract_roundcube_to DESTDIR
extract_roundcube() {
  local DESTDIR=$1

  # retrieve and extract Roundcube tarball
  rc_tarball="${DESTDIR}/roundcube.tar.gz"
  wget -q -O "$rc_tarball" "$ROUNDCUBE_SOURCE_URL" \
    || ynh_die "Unable to download Roundcube tarball"
  echo "$ROUNDCUBE_SOURCE_SHA256 $rc_tarball" | sha256sum -c >/dev/null \
    || ynh_die "Invalid checksum of downloaded tarball"
  tar xf "$rc_tarball" -C "$DESTDIR" --strip-components 1 \
    || ynh_die "Unable to extract Roundcube tarball"
  rm "$rc_tarball"

  # apply patches
  (cd "$DESTDIR" \
   && for p in ${PKGDIR}/patches/*.patch; do patch -p1 < $p; done) \
    || ynh_die "Unable to apply patches to Roundcube"

  # copy composer.json-dist for Roundcube with complete dependencies
  cp "${PKGDIR}/sources/composer.json-dist" "${DESTDIR}/composer.json-dist"
}

# Execute a command as another user
# usage: exec_as USER COMMAND [ARG ...]
exec_as() {
  local USER=$1
  shift 1

  if [[ $USER = $(whoami) ]]; then
    eval $@
  else
    # use sudo twice to be root and be allowed to use another user
    sudo sudo -u "$USER" $@
  fi
}

# Execute a composer command from a given directory
# usage: composer_exec AS_USER WORKDIR COMMAND [ARG ...]
exec_composer() {
  local AS_USER=$1
  local WORKDIR=$2
  shift 2

  exec_as "$AS_USER" COMPOSER_HOME="${WORKDIR}/.composer" \
    php "${WORKDIR}/composer.phar" $@ \
      -d "${WORKDIR}" --quiet --no-interaction
}

# Install and initialize Composer in the given directory
# usage: init_composer DESTDIR [AS_USER]
init_composer() {
  local DESTDIR=$1
  local AS_USER=${2:-admin}

  # install composer
  curl -sS https://getcomposer.org/installer \
    | exec_as "$AS_USER" COMPOSER_HOME="${DESTDIR}/.composer" \
        php -- --quiet --install-dir="$DESTDIR" \
    || ynh_die "Unable to install Composer"

  # install composer.json
  exec_as "$AS_USER" \
    cp "${DESTDIR}/composer.json-dist" "${DESTDIR}/composer.json"

  # update dependencies to create composer.lock
  exec_composer "$AS_USER" "$DESTDIR" install --no-dev \
    || ynh_die "Unable to update Roundcube core dependencies"
}

# Install and configure CardDAV plugin for Roundcube
# usage: install_carddav DESTDIR [AS_USER]
install_carddav() {
  local DESTDIR=$1
  local AS_USER=${2:-www-data}

  local carddav_config="${DESTDIR}/plugins/carddav/config.inc.php"
  local carddav_tmp_config="${PKGDIR}/conf/carddav.config.inc.php"

  exec_composer "$AS_USER" "$DESTDIR" require \
      "roundcube/carddav dev-master"

  # Look for installed and supported CardDAV servers
  for carddav_app in "owncloud" "baikal"; do
    local app_id=$(sudo yunohost app list --installed -f "$carddav_app" \
            --output-as json | grep -Po '"id":[ ]?"\K.*?(?=")' | head -1)
    [[ -z "$app_id" ]] || {
      # Retrieve app settings and enable relevant preset
      carddav_domain=$(ynh_app_setting_get "$app_id" domain)
      carddav_path=$(ynh_app_setting_get "$app_id" path)
      carddav_url="https://${carddav_domain}${carddav_path%/}"
      sed -i "s#{${carddav_app}_url}#${carddav_url}#g" "$carddav_tmp_config"
      sed -i \
"/\/\/\/\/ PRESET FOR: ${carddav_app}/\
,/\/\/\/\/ END: ${carddav_app}/s/^\/\///" "$carddav_tmp_config"
    }
  done

  # Copy plugin the configuration file
  sudo cp "$carddav_tmp_config" "$carddav_config"
  sudo chown "${AS_USER}:" "$carddav_config"
}