#!/bin/sh
set -eu

FRIENDICA_VERSION=${FRIENDICA_VERSION:-develop}
FRIENDICA_ADDONS=${FRIENDICA_ADDONS:-develop}
AUTOINSTALL=${AUTOINSTALL:-false}

SOURCEDIR=/usr/src
WORKDIR=/var/www/html

# run an command with the www-data user
run_as() {
  if [ "$(id -u)" = 0 ]; then
    su - www-data -s /bin/sh -c "$1"
  else
    sh -c "$1"
  fi
}

# checks if the the first parameter is greater than the second parameter
version_greater() {
  [ "$(printf '%s\n' "$@" | sort -t '.' -n -k1,1 -k2,2 | head -n 1)" != "$1" ]
}

# clones the whole develop branch (Friendica and Addons)
clone_develop() {
  dir="${1:-$SOURCEDIR}"
  friendica="${2:-$FRIENDICA_VERSION}"
  addons="${3:-$FRIENDICA_ADDONS}"

  echo "Cloning Friendica '${friendica}' with Addons '${addons}' into '${dir}'"

  git clone -b ${friendica} https://github.com/friendica/friendica ${dir}/friendica
  chmod 777 ${dir}/friendica/view/smarty3
  mkdir ${dir}/friendica/addon
  git clone -b ${addons} https://github.com/friendica/friendica-addons ${dir}/friendica/addon
}

# help of this shell script
friendica_help() {
  echo "Usage: friendica <command> [<args>]"
  echo ""
  echo "Commands:"
  echo "      console     Executes an command in the Friendica console"
  echo "      composer    Executes the composer.phar executable for Friendica"
  echo "      install     Installs Friendica"
  echo "      update      Updates Friendica"
  exit 1
}

# executes the Friendica console
console() {
  cd ${WORKDIR}
  php "${WORKDIR}/bin/console.php" "$@"
}

# executes the composer.phar binary of Friendica
composer() {
  if [ -f ${WORKDIR}/bin/composer.phar ]; then
    run_as "cd ${WORKDIR};${WORKDIR}/bin/composer.phar "$@" -d ${WORKDIR}"
  fi
}

copy_sources() {
  installed_version="0.0.0.0"
  if [ -f ${WORKDIR}/VERSION ]; then
    installed_version="$(cat ${WORKDIR}/VERSION)"
  fi

  image_version="0.0.0.0"
  if [ -f ${SOURCEDIR}/friendica/VERSION ]; then
    image_version="$(cat ${SOURCEDIR}/friendica/VERSION)"
  elif [ "$FRIENDICA_VERSION" = "develop" ]; then
    clone_develop
    image_version="$(cat ${SOURCEDIR}/friendica/VERSION)"
  else
    # no given installation and not using the developer branch => nothing to do
    echo "Friendica command '$1' failed, because of no valid combination of source and version"
    return;
  fi

  if version_greater "$installed_version" "$image_version"; then
    echo "Can't copy Friendica sources because the version of the data ($installed_version) is higher than the docker image ($image_version)"
    exit 1;
  fi

  if version_greater "$image_version" "$installed_version"; then
    if [ "$(id -u)" = 0 ]; then
        rsync_options="-rlDog --chown www-data:root"
    else
        rsync_options="-rlD"
    fi

    echo "Copying Friendica sources ($image_version) from '${SOURCEDIR}/friendica' to '${WORKDIR}'"
    rsync $rsync_options --delete --exclude='.git/' ${SOURCEDIR}/friendica/ ${WORKDIR}/
  fi
}

# install Friendica
install() {
  if [ -f ${WORKDIR}/VERSION ]; then
    # If there is a given installation of Friendica and we should not update it => exit
    # We have to explicit update Friendica to avoid breaking something
    return
  fi

  copy_sources

  echo "Installing Friendica"
  if [ "$FRIENDICA_VERSION" = "develop" ]; then
    composer "install"
  fi

  if [ ! -f ${WORKDIR}/.htconfig.php ] &&
     [ -f ${SOURCEDIR}/config/htconfig.php ] &&
     "$AUTOINSTALL" == "true"; then
    run_as "cp ${SOURCEDIR}/config/htconfig.php ${WORKDIR}/html/.htconfig.php"
    # TODO Pull Request for dba Change
    run_as "sed -i 's/\s+\sDNS_CNAME//g' ${WORKDIR}/include/dba.php"
    console "autoinstall -f .htconfig.php"
    # TODO Workaround because of a strange permission issue
    rm -fr ${WORKDIR}/view/smarty3/compiled
  fi
}

update() {
  if [ ! -f ${WORKDIR}/VERSION ]; then
    # We want to update a given installation
    # if there is no installation, exit
    return
  fi

  copy_sources

  echo "Upgrading Friendica"
  if [ "$FRIENDICA_VERSION" = "develop" ]; then
    composer "update"
  fi
  console "dbstructure update"
}

if [ $# -eq 0 ]; then
  friendica_help
fi

case "$1" in
  install) shift; install "$@";;
  update) shift; update "$@" ;;
  console) shift; console "$@" ;;
  composer) shift; composer "$@" ;;
  *) friendica_help ;;
esac