#!/bin/bash

set -ex

# Configuration options you usually edit go here
ROUNDCUBEMAIL_VERSION=1.4.7
CHECK_GPG=false
CLEAN_INTERMEDIATES=false
CONTAINER_VOLUME_CONFIG=/var/roundcube/config
CONTAINER_WEBROOT=/var/www/html
CONTAINER_PHP_CONFD=/usr/local/etc/php/conf.d
CONTAINER_SCRIPTS=/usr/local/sbin

# This is internal stuff used to build everything
# Be aware, that several of these paths are used with rm -rf!
SRCDIR=$(pwd)/src
TMPDIR=$(pwd)/tmp
BUILDDIR=$(pwd)/build
SCRIPTS_SRC=${SRCDIR}/scripts
ROUNDCUBE_DOWNLOAD=${TMPDIR}/roundcubemail.tar.gz
ROUNDCUBE_ASC_DOWNLOAD=${ROUDCUBE_DOWNLOAD}.asc
ROUNDCUBE_SRC=${TMPDIR}/roundcubemail
ISPCONFIG_DOWNLOAD=${TMPDIR}/ispconfig3_roundcube.zip
ISPCONFIG_SRC=${TMPDIR}/ispconfig3_roundcube
ROOTFSTREE=${TMPDIR}/tree
ROOTFSFILE=${BUILDDIR}/rootfs.tar.gz
CONFIG_DST=${ROOTFSTREE}${CONTAINER_VOLUME_CONFIG}
WEBROOT_DST=${ROOTFSTREE}${CONTAINER_WEBROOT}
PHP_CONFD_DST=${ROOTFSTREE}${CONTAINER_PHP_CONFD}
SCRIPTS_DST=${ROOTFSTREE}${CONTAINER_SCRIPTS}

#### Sanitize Build Enviornment
if [ -d ${TMPDIR} ]; then
	rm -rf ${TMPDIR}
fi
mkdir ${TMPDIR}

if [ -d ${BUILDDIR} ]; then
	rm -rf ${BUILDDIR}
fi
mkdir ${BUILDDIR}

#### Prepare the roundcube source 

# Download Roundcube and verify GPG if configured to do so:
if [ -f ${ROUNDCUBE_DOWNLOAD} ]; then 
	rm -f ${ROUNDCUBE_DOWNLOAD} 
fi

curl -o ${ROUNDCUBE_DOWNLOAD} \
	-SL https://github.com/roundcube/roundcubemail/releases/download/${ROUNDCUBEMAIL_VERSION}/roundcubemail-${ROUNDCUBEMAIL_VERSION}-complete.tar.gz

if [ "$CHECK_GPG" = true ]; then
	export GNUPGHOME="$(mktemp -d)"

	if [ -f ${ROUNDCUBE_ASC_DOWNLOAD} ]; then 
		rm -f ${ROUNDCUBE_ASC_DOWNLOAD} 
	fi
	curl -o ${ROUNDCUBE_ASC_DOWNLOAD} \
		-SL https://github.com/roundcube/roundcubemail/releases/download/${ROUNDCUBEMAIL_VERSION}/roundcubemail-${ROUNDCUBEMAIL_VERSION}-complete.tar.gz.asc

	# ha.pool.sks-keyservers.net seems to be unreliable, use pgp.mit.edu as fallback
	gpg --keyserver ha.pool.sks-keyservers.net --recv-keys F3E4C04BB3DB5D4215C45F7F5AB2BAA141C4F7D5 \
		|| gpg --keyserver pgp.mit.edu --recv-keys F3E4C04BB3DB5D4215C45F7F5AB2BAA141C4F7D5

	gpg --batch --verify ${ROUNDCUBE_ASC_DOWNLOAD} ${ROUNDCUBE_DOWNLOAD}

	# Clean up behind us
	if [ "$CLEAN_INTERMEDIATES" = true ]; then
		gpgconf --kill all
		rm -rf "$GNUPGHOME" ${ROUNDCUBE_ASC_DOWNLOAD}
	fi
fi

# Extract the file into a temporary location and clean up behind us
tar -xzf ${ROUNDCUBE_DOWNLOAD} -C ${TMPDIR}

# upstream tarballs include ./roundcubemail-${ROUNDCUBEMAIL_VERSION}/ so this gives us TMPDIR/roundcubemail-${ROUNDCUBEMAIL_VERSION}
mv ${TMPDIR}/roundcubemail-${ROUNDCUBEMAIL_VERSION} ${ROUNDCUBE_SRC}

# Clean up the source tree for later use
rm -rf ${ROUNDCUBE_SRC}/installer

# Clean up behind us
if [ "$CLEAN_INTERMEDIATES" = true ]; then
	rm -f ${ROUNDCUBE_DOWNLOAD} 
fi


#### Prepare the ISPConfig Stuff

if [ -f ${ISPCONFIG_DOWNLOAD} ]; then 
	rm -f ${ISPCONFIG_DOWNLOAD} 
fi
curl -o ${ISPCONFIG_DOWNLOAD} -SL https://github.com/w2c/ispconfig3_roundcube/archive/master.zip

unzip -q ${ISPCONFIG_DOWNLOAD} -d ${TMPDIR}
# This gives us a dir ispconfig3_roundcube-master, which we normalize
mv ${TMPDIR}/ispconfig3_roundcube-master ${ISPCONFIG_SRC}

# Clean up the source tree for later use
rm -f ${ISPCONFIG_SRC}/.gitignore ${ISPCONFIG_SRC}/README.md

#### Create the ROOT FS TREE

mkdir -p ${ROOTFSTREE}

# Prepare the Webroot directory with the source tree, then create some links, which we'll 
# need during runtime, they will be created by our entry point script.
mkdir -p ${WEBROOT_DST}
tar -c --one-file-system -C ${ROUNDCUBE_SRC} . | tar -x -C ${WEBROOT_DST}
ln -s ${CONTAINER_VOLUME_CONFIG}/config.inc.php ${WEBROOT_DST}/config/config.inc.php
cp ${SRCDIR}/db.inc.php ${WEBROOT_DST}/config/db.inc.php

# Setup PHP
mkdir -p ${PHP_CONFD_DST}
cp ${SRCDIR}/php.ini ${PHP_CONFD_DST}/php.ini

# Move the ISPConfig Plugins into place, again create some links which we'll need during
# runtime. These too will be created by our entry point script
tar -c --one-file-system -C ${ISPCONFIG_SRC} . | tar -x -C ${WEBROOT_DST}/plugins
ln -s ${CONTAINER_VOLUME_CONFIG}/ispconfig3_account.inc.php ${WEBROOT_DST}/plugins/ispconfig3_account/config/config.inc.php

# Add Entry Point
cp -a ${SRCDIR}/docker-entrypoint.sh ${ROOTFSTREE}

# Add all helper scripts
mkdir -p ${SCRIPTS_DST}

curl -o ${SCRIPTS_DST}/wait-for-it.sh \
	-SL https://raw.githubusercontent.com/vishnubob/wait-for-it/master/wait-for-it.sh 
chmod +x ${SCRIPTS_DST}/wait-for-it.sh

cp -a ${SCRIPTS_SRC}/* ${SCRIPTS_DST}

# Clean up behind us
if [ "$CLEAN_INTERMEDIATES" = true ]; then
	rm -rf ${ROUNDCUBE_SRC}
	rm -rf ${ISPCONFIG_SRC}
fi

#### Now we tar everything together, so that the Dockerfile can put everything in place in one run
tar -czf ${ROOTFSFILE} -C ${ROOTFSTREE} .

# Clean up behind us
if [ "$CLEAN_INTERMEDIATES" = true ]; then
	rm -rf ${ROOTFSTREE}
fi