#!/sbin/openrc-run
# Copyright 2024 Willy Garidol
# Distributed under the terms of the GNU General Public License v3

depend() {
        need localmount net
}

# Name of the share
WD_SHARE_NAME="${SHARE_NAME}"
# Where is the original data
WD_DATA_FOLDER="${DATA_FOLDER}"
# Where WebDAV temporary stuff will be located
WD_TEMP_FOLDER="${TEMP_FOLDER}"
WD_ROOT_FOLDER="${WD_TEMP_FOLDER}/root"
WD_MOUNT_FOLDER="${WD_TEMP_FOLDER}/root/webdav/${WD_SHARE_NAME}"
WD_LOCKS_FOLDER="${WD_TEMP_FOLDER}/locks"

WD_TIMEOUT=${TIMEOUT:-5}
WD_LOG_PATH="/var/log/webdav"
WD_SLOT="${SVCNAME#webdav.}"
WD_USER=${USER:-${WD_SLOT}}
WD_GROUP=${GROUP:-${WD_SLOT}}

description=${DESCRIPTION:-WebDAV starter}
pidfile="/run/${RC_SVCNAME}.pid"
apache_args=(
-c "ServerRoot /usr/lib64/apache2"
-c "LoadModule dav_module modules/mod_dav.so"
-c "LoadModule dav_fs_module modules/mod_dav_fs.so"
-c "LoadModule dav_lock_module modules/mod_dav_lock.so"
-c "Include /etc/apache2/modules.d/*.conf"
-c "User ${WD_USER}"
-c "Group ${WD_GROUP}"
-c "DavLockDB ${WD_TEMP_FOLDER}/locks"
-c "PidFile ${pidfile}"
-c "ErrorLog ${WD_LOG_PATH}/${WD_SLOT}/error.log"
-c "CustomLog ${WD_LOG_PATH}/${WD_SLOT}/access.log common"
-c "DocumentRoot ${WD_ROOT_FOLDER}"
-c "ServerName 127.0.0.1"
-c "Listen 127.0.0.1:${PORT}"
-c "<Directory ${WD_ROOT_FOLDER}>"
-c " DAV On"
-c " AllowOverride All"
-c " Options -Indexes +FollowSymlinks -ExecCGI -Includes"
-c " Require all granted"
-c "</Directory>"
-c "SetEnv redirect-carefully"
)

start_pre() {
        # script must be run with ".sharename" symlink:
        if [ "${WD_SLOT}" = "webdav" ]
        then
                ebegin "Error: do not run this script, run a link to it!"
                eend 255
                return 255
        fi
        # Data folder must exist:
        if [ -z ${WD_DATA_FOLDER} -o ! -d ${WD_DATA_FOLDER} ]
        then
                ebegin "Error: DATA_FOLDER must be defined and path must exist!"
                eend 255
                return 255
        fi
        # Create log paths
        test -e "${WD_LOG_PATH}" || mkdir "${WD_LOG_PATH}"
        test -e "${WD_LOG_PATH}/${WD_SLOT}" || {
                ebegin "Creating log path '${WD_LOG_PATH}/${WD_SLOT}'"
                mkdir "${WD_LOG_PATH}/${WD_SLOT}"
        } && chown -R ${WD_USER} "${WD_LOG_PATH}/${WD_SLOT}"
        # Create all temporary paths:
        for path in ${WD_TEMP_FOLDER} ${WD_ROOT_FOLDER} ${WD_MOUNT_FOLDER} ${WD_LOCKS_FOLDER}
        do
                test -e ${path} || {
                        ebegin "Creating '${path}' path"
                        mkdir -p ${path}
                        chown ${WD_USER}:${WD_GROUP} ${path}
                }
        done
        test -z "$(mount | grep ${WD_MOUNT_FOLDER})" && {
                ebegin "Mounting/binding root path '${WD_DATA_FOLDER}' -> '${WD_MOUNT_FOLDER}'"
                mount -o bind ${WD_DATA_FOLDER} ${WD_MOUNT_FOLDER}
        }
        eend 0
}

start() {
        start-stop-daemon -w ${WD_TIMEOUT} --start --pidfile "${pidfile}" -- \
                /usr/bin/apache2 "${apache_args[@]}"
        eend $?
}

stop_post() {
        test -n "$(mount | grep ${WD_MOUNT_FOLDER})" && {
                ebegin "Unmounting/unbinding root path '${WD_DATA_FOLDER}' -|-> '${WD_MOUNT_FOLDER}'"
                umount ${WD_MOUNT_FOLDER}
        }
        eend 0
}