#!/usr/bin/env bash

# Provision a blank DokuWiki install and configure it for general use.

# The root location may exist or not, depending on your needs, and you
# should aim not to change this file, instead providing a specific
# configuration script that sources this file.

# To use this in Vagrant, call your provisioning script, and set the
# shell environment variables, DW_DOWNLOAD, DW_PACKAGE, DW_PATH,
# DW_TITLE, DW_ADMIN_EMAIL, and DW_ADMIN_PASS.

# Configuration ========================================================

# Script constants -----------------------------------------------------

PROVISION_TIME=$(date '+%Y-%m-%dT%H:%M:%S%:z')

SUCCESS=0
FAILURE=1

# Script variables -----------------------------------------------------

dw_download="${DW_DOWNLOAD}"
dw_package="${DW_PACKAGE}"
dw_path="${DW_PATH}"
dw_title="${DW_TITLE}"
dw_admin_email="${DW_ADMIN_EMAIL}"
dw_admin_pass="${DW_ADMIN_PASS}"

# Installation steps ===================================================

function prepare_dokuwiki_path {
	if [[ -d "${dw_path}" ]] ; then
		echo "DokuWiki path ${dw_path} already exists"
		return ${SUCCESS}
	fi

	echo "Making DokuWiki path ${dw_path}"
	mkdir -p "${dw_path}"
	status=$?
	if [[ ${status} -gt ${SUCCESS} ]] ; then
		echo "Error ${status} from mkdir while making DokuWiki path ${dw_path}"
		return ${FAILURE}
	fi

	if [[ ! -d "${dw_path}" ]] ; then
		echo "No error from mkdir, but DokuWiki path ${dw_path} doesn't exist"
		return ${FAILURE}
	fi
}

function download_dokuwiki {
	if [[ -e "${dw_package}" ]] ; then
		echo "DokuWiki package ${dw_package} is already downloaded"
		echo "If you want to replace it, delete this file"
		return ${SUCCESS}
	fi

	echo "Downloading DokuWiki from ${dw_download}"
	curl --output "${dw_package}" --silent --show-error "${dw_download}"
	status=$?
	if [[ ${status} -gt ${SUCCESS} ]] ; then
		echo "Error ${status} from curl while dowloading DokuWiki from ${dw_download}"
		return ${FAILURE}
	fi

	if [[ -e "${dw_package}" ]] ; then
		echo "Downloaded DokuWiki package ${dw_package}"
		return ${SUCCESS}
	else
		echo "No error from curl, but ${dw_package} doesn't exist"
		return ${FAILURE}
	fi
}

function unpack_dokuwiki {
	if [[ ! -e "${dw_package}" ]] ; then
		echo "No package ${dw_package} to unpack"
		return ${FAILURE}
	fi

	# Check for a container directory in the archive in the format dokuwiki-nnnn-nn-nnx/
	contained_files=$(tar -tf "${dw_package}" | grep '^dokuwiki-[0-9][0-9][0-9][0-9]-[0-9][0-9]-[0-9][0-9][a-z]\?/' | wc -l)
#	echo "There are ${contained_files} contained files in the package"
	if [[ ${contained_files} -gt 0 ]] ; then
		# DokuWiki's files are in a container
		strip_components=1
		echo "Stripping container directory from the compressed files"
	else
		strip_components=0
	fi

	echo "Unpacking DokuWiki into ${dw_path}"
	tar --strip ${strip_components} --directory="${dw_path}" -zxf "${dw_package}"
	status=$?
	if [[ ${status} -gt ${SUCCESS} ]] ; then
		echo "Error ${status} from tar while unpacking DokuWiki from ${dw_package}"
		return ${FAILURE}
	fi

	if [[ ! -e "${dw_path}/doku.php" ]] ; then
		echo "No error from tar, but DokuWiki isn't unpacked in ${dw_path}"
		return ${FAILURE}
	fi

	echo "DokuWiki unpacked in ${dw_path}"
	return ${SUCCESS}
}

function configure_dokuwiki {
	if [[ -e "${dw_path}/conf/local.php" ]] ; then
		echo "DokuWiki is already configured in ${dw_path}/conf/local.php"
		echo "If you want to replace the configuration, delete this file"
		return ${SUCCESS}
	fi

	if [[ ! -d "${dw_path}/conf" ]] ; then
		echo "Install didn't prepare a conf directory for DokuWiki"
		return ${FAILURE}
	fi

# Local configuration --------------------------------------------------

	config_file="${dw_path}/conf/local.php"
	cat > "${config_file}" <<EOF
<?php
/**
 * Dokuwiki's Main Configuration File - Local Settings
 * Auto-generated by Vagrant provisioning
 * Date: ${PROVISION_TIME}
 */
\$conf['title'] = '${dw_title}';
EOF
	cat >> "${config_file}" <<'EOF'
$conf['lang'] = 'en';
$conf['license'] = '0';
$conf['useacl'] = 1;
$conf['superuser'] = '@admin';
$conf['disableactions'] = 'register';
$conf['allowdebug'] = 1;
EOF
	if [[ ! -e "${config_file}" ]] ; then
		echo "No error from cat command, but DokuWiki isn't configured in ${config_file}"
		return ${FAILURE}
	fi

# ACL configuration ----------------------------------------------------

	config_file="${dw_path}/conf/acl.auth.php"
	cat > "${config_file}" <<EOF
# acl.auth.php
# <?php exit()?>
# Don't modify the lines above
#
# Access Control Lists
#
# Auto-generated by Vagrant provisioning
# Date: ${PROVISION_TIME}
*               @ALL          1
*               @user         8
EOF
	if [[ ! -e "${config_file}" ]] ; then
		echo "No error from cat command, but DokuWiki isn't configured in ${config_file}"
		return ${FAILURE}
	fi

# User configuration ---------------------------------------------------
	DW_ADMIN_HASH=$(cd "${dw_path}" ; php /vagrant/dokuwiki_password.php "${DW_ADMIN_PASS}")

	config_file="${dw_path}/conf/users.auth.php"
	cat > "${config_file}" <<EOF
# users.auth.php
# <?php exit()?>
# Don't modify the lines above
#
# Userfile
#
# Format:
#
# login:passwordhash:Real Name:email:groups,comma,seperated
#
# Auto-generated by Vagrant provisioning
# Date: ${PROVISION_TIME}
EOF
	cat >> "${config_file}" <<EOF
admin:${DW_ADMIN_HASH}:DokuWiki Administrator:${dw_admin_email}:admin,user
EOF
	if [[ ! -e "${config_file}" ]] ; then
		echo "No error from cat command, but DokuWiki isn't configured in ${config_file}"
		return ${FAILURE}
	fi

# Plugin configuration -------------------------------------------------

	config_file="${dw_path}/conf/plugins.local.php"
	cat > "${config_file}" <<EOF
<?php
/*
 * Local plugin enable/disable settings
 *
 * Auto-generated by Vagrant provisioning
 * Date: ${PROVISION_TIME}
 */
EOF
	cat >> "${config_file}" <<'EOF'
$plugins['authad']    = 0;
$plugins['authldap']  = 0;
$plugins['authmysql'] = 0;
$plugins['authpgsql'] = 0;
EOF
	if [[ ! -e "${config_file}" ]] ; then
		echo "No error from cat command, but DokuWiki isn't configured in ${config_file}"
		return ${FAILURE}
	fi

	echo "DokuWiki configured in ${dw_path}/conf"
	return ${SUCCESS}
}

# Full installation function ===========================================

function install_dokuwiki {
	if [[ -e "${dw_path}/doku.php" ]] ; then
		echo "DokuWiki is already installed"
		return ${SUCCESS}
	fi

	prepare_dokuwiki_path
	status=$?
	if [[ ${status} -gt ${SUCCESS} ]] ; then
		return ${status}
	fi

	download_dokuwiki
	status=$?
	if [[ ${status} -gt ${SUCCESS} ]] ; then
		return ${status}
	fi

	unpack_dokuwiki
	status=$?
	if [[ ${status} -gt ${SUCCESS} ]] ; then
		return ${status}
	fi

	configure_dokuwiki
	status=$?
	if [[ ${status} -gt ${SUCCESS} ]] ; then
		return ${status}
	fi

	return ${SUCCESS}
}

# Script ===============================================================

install_dokuwiki
status=$?
if [[ ${status} -gt ${SUCCESS} ]] ; then
	exit ${status}
fi