#!/bin/sh
set -eu

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

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

# change delimiter for arrays from whitespaces to newlines (so we can pass strings with whitespaces)
#IFS=\r\n

VERBOSE=1
for arg; do
	case "$arg" in
		-q|--quit)
		    if [ "$VERBOSE" -eq "2" ]; then
		      echo 'You cannot use verbose and quiet at the same time'
		      exit 1
		    fi
			VERBOSE=0
			break
			;;
		-v|--verbose)
		    if [ "$VERBOSE" -eq "0" ]; then
		      echo 'You cannot use verbose and quiet at the same time'
		      exit 1
		    fi
		    VERBOSE=2
		    break
		    ;;
	esac
done

# 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
}

# log event
log() {
  currVerb=1
  if [ $# -eq 2 ]; then
    currVerb=$2
  fi
  if [ "$VERBOSE" -ge "$currVerb" ]; then
    echo "$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}"

  friendica_git=$friendica
  addons_git=$addons
  if echo "$friendica" | grep -Eq '^.*\-dev'; then
    friendica_git="develop"
  fi

  if echo "$addons" | grep -Eq '^.*\-dev'; then
    addons_git="develop"
  fi

  log 'Cloning Friendica '\'$friendica_git\'' with Addons '\'$addons_git\'' into '\'$dir\'

  # Removing the whole directory first
  rm -fr $dir/friendica

  sh -c "git clone -q -b ${friendica_git} https://github.com/friendica/friendica ${dir}/friendica"
  mkdir $dir/friendica/addon
  sh -c "git clone -q -b ${addons_git} 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 0
}

# executes the Friendica console
console() {
  cd $WORKDIR
  # Todo starting a php-executable without quoting the arguments seems not secure (but is the only way it works)
  sh -c "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

  if echo "$FRIENDICA_VERSION" | grep -Eq '^.*(\-dev|-rc)'; then
    clone_develop
  fi

  image_version="0.0.0.0"
  if [ -f $SOURCEDIR/friendica/VERSION ]; then
    image_version="$(cat $SOURCEDIR/friendica/VERSION)"
  else
    # no given installation and not using the developer branch => nothing to do
    log 'Friendica command '\'$1\'' failed, because of no version found', 0
    exit 1;
  fi

  if version_greater "$installed_version" "$image_version"; then
    log 'Can'\''t copy Friendica sources because the version of the data ($installed_version) is higher than the docker image ('$image_version')', 0
    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

    log 'Copying Friendica sources ('$image_version') from '\'$SOURCEDIR'/friendica'\'' to '\'$WORKDIR\'
    rsync $rsync_options --delete --exclude=.git --exclude=photo --exclude=proxy --exclude=.htconfig.php $SOURCEDIR/friendica/ $WORKDIR/

    if [ -f $WORKDIR/view/smarty3 ]; then
        chmod 777 $WORKDIR/view/smarty3
    fi
  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

  log 'Installing Friendica'
  if echo "$FRIENDICA_VERSION" | grep -Eq '^.*(\-dev|-rc)'; 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

  log 'Upgrading Friendica'
  if echo "$FRIENDICA_VERSION" | grep -Eq '^.*(\-dev|-rc)'; then
    composer "install"
  fi
  console "dbstructure update"
}

sendmail() {
  if [ ! -f /etc/init.d/sendmail ]; then
    # If sendmail isn't installed, exit this method
    return
  fi

  line=$(head -n 1 /etc/hosts)
  line2=$(echo $line | awk '{print $2}')
  echo "$line $line2.localdomain" >> /etc/hosts

  log 'Starting sendmail for Mail-Support'
  nohup /etc/init.d/sendmail start > /dev/null 2>&1 &
}

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

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