#!/bin/sh
set -eu

SMTP=${SMTP:-localhost}
SMTP_FROM=${SMTP_FROM:-no-reply}

SOURCEDIR=${SOURCEDIR:-/usr/src}
WORKDIR=${WORKDIR:-/var/www/html}

SMTP_TLS=${SMTP_TLS:-}
SMTP_STARTTLS=${SMTP_STARTTLS:-}
SMTP_AUTH_USER=${SMTP_AUTH_USER:-}
SMTP_AUTH_PASS=${SMTP_AUTH_PASS:-}
SMTP_AUTH_METHOD=${SMTP_AUTH_METHOD:-}

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)" -eq 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() {
  if [ -f $WORKDIR/bin/console.php ]; then
    cd $WORKDIR
    php $WORKDIR/bin/console.php "$@"
  fi
}

# 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"
  elif [ -f $SOURCEDIR/friendica/bin/composer.phar ]; then
    cd $SOURCEDIR/friendica
    $SOURCEDIR/friendica/bin/composer.phar "$@" -d $SOURCEDIR/friendica
  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)" -eq 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'
  composer install

  if [ ! -f ${WORKDIR}/.htconfig.php ] &&
     [ -f ${SOURCEDIR}/config/htconfig.php ] &&
     [ "$AUTOINSTALL" = "true" ]; then
    run_as "cp ${SOURCEDIR}/config/htconfig.php ${WORKDIR}/.htconfig.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'

  composer install
  console dbstructure update
}

configmail() {
  if [ "$SMTP" = "localhost" ]; then
    # SMTP is a required setting
    # do nothing if it is "localhost" (= not changed)
    return
  fi

  sed -i "s/:root:/:${SITENAME}:/g" /etc/passwd
  sed -i "s/Linux\ User/${SITENAME}/g" /etc/passwd

  # add possible mail-senders
  echo "www-data:$SMTP_FROM@$HOSTNAME:$SMTP" >> /etc/ssmtp/revaliases
  echo "root:$SMTP_FROM@$HOSTNAME:$SMTP" >> /etc/ssmtp/revaliases

  # replace ssmtp.conf settings
  cat << EOF > /etc/ssmtp/ssmtp.conf
# /etc/ssmtp/ssmtp.conf

root=$SMTP_FROM@$HOSTNAME
hostname=$HOSTNAME
mailhub=$SMTP
FromLineOverride=YES
EOF
  [ -z "$SMTP_TLS" ] || echo "UseTLS=$SMTP_TLS" >> /etc/ssmtp/ssmtp.conf
  [ -z "$SMTP_STARTTLS" ] || echo "UseSTARTTLS=$SMTP_STARTTLS" >> /etc/ssmtp/ssmtp.conf
  [ -z "$SMTP_AUTH_USER" ] || echo "AuthUser=$SMTP_AUTH_USER" >> /etc/ssmtp/ssmtp.conf
  [ -z "$SMTP_AUTH_PASS" ] || echo "AuthPass=$SMTP_AUTH_PASS" >> /etc/ssmtp/ssmtp.conf
  [ -z "$SMTP_AUTH_METHOD" ] || echo "AuthMethod=$SMTP_AUTH_METHOD" >> /etc/ssmtp/ssmtp.conf
}

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

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