#!/bin/sh
# Purpose {{{
## Create a temp file (to monitor) if an upgrade is available for Vaultwarden
## (previously Bitwarden_rs) project on Github.
## It based on /opt/vaultwarden/vaultwarden binary available or the one give
## as first argument.
## How-to use {{{
### 1. Needs releasetags script, in the same directory
### cf. https://git.ipr.univ-rennes.fr/cellinfo/scripts/src/master/github/releasetags
# wget https://git.ipr.univ-rennes.fr/cellinfo/scripts/raw/master/github/releasetags
### 2. Create a cron job, eg.
#00 20 * * * root /opt/repos/ipr.scripts/github/check_vaultwarden_update
### 2-1 Create a cron job with a specific path for vaultwarden bin, eg.
#00 20 * * * root /opt/repos/ipr.scripts/github/check_vaultwarden_update /srv/bin/vaultwarden
### 3. Monitor the temp file : /tmp/.github.vaultwarden.upgrade
# Or enable MAILTO in cronjob and edit the script to print a message.
# Or send a mail.
# …
## }}}
# }}}

# Expect max 1 argument {{{
if [ $# -gt 1 ]
then
	cat << HELP

check.vaultwarden.update  --
Compare current version of an installed Vaultwarden and the last available.

EXAMPLE :
    - Compare the current version of Vaultwarden with bin available in
      /opt/vaultwarden/vaultwarden
        check.vaultwarden.update

    - Compare the current version of Vaultwarden at a specific place
        check.vaultwarden.update /srv/bin/vaultwarden

HELP

	exit 1

fi
# }}}

# Vars {{{
DEBUG=1

script_wd=$(dirname "${0}")

if [ $# -eq 1 ]  ## If an argument was gave
then
	vaultwarden_bin_path="${1}"
else
	vaultwarden_bin_path="/opt/vaultwarden/vaultwarden"
	fi

vaultwarden_current_version=$("${vaultwarden_bin_path}" --version | sed 's/vaultwarden \(\([0-9]\{1,3\}\.\)\{2\}\([0-9]\{1,3\}\)\).*/\1/')

vaultwarden_repo_url="https://github.com/dani-garcia/vaultwarden"
vaultwarden_new_version=$("${script_wd}"/releasetags "${vaultwarden_repo_url}" | grep -vE -- '(dev|rc)' | head -n1)

vaultwarden_new_version_file="/tmp/.github.vaultwarden.upgrade"
# }}}

# Check if the current version is the last one {{{
if [ "${vaultwarden_current_version}" != "${vaultwarden_new_version}" ]; then
	[ "${DEBUG}" -eq "0" ] && printf '\e[1;35m%-6s\e[m\n' "DEBUG : Test version — Current version (${vaultwarden_current_version}) and new one (${vaultwarden_new_version}) seems to be different."

	## Create a temp file to monitor
	touch -- "${vaultwarden_new_version_file}"
	printf '\e[1;35m%-6s\e[m\n' "An upgrade is available for Vaultwarden (current : ${vaultwarden_current_version}) : ${vaultwarden_new_version}." >> "${vaultwarden_new_version_file}"

else
	[ "${DEBUG}" -eq "0" ] && printf '\e[1;35m%-6s\e[m\n' "DEBUG : Test version — The current version is up-to-date."
	rm -f -- "${vaultwarden_new_version_file}"
fi
# }}}

exit 0