#!/bin/sh
# Purpose {{{
## Create a temp file (to monitor) if an upgrade is available for Self Service Password (SSP)
## project on Github.
## It's based on .deb package installation to check the current version.
## It can also be based on installation from source if the self-service-password's
## root is given as first argument.
## How-to use {{{
### 1. Needs releasetags script, in the same directory
### cf. https://git.101010.fr/gardouille-dotfiles/scripts/src/branch/master/github/releasetags
# wget https://git.101010.fr/gardouille-dotfiles/scripts/raw/branch/master/github/releasetags
### 2. Create a cron job, eg :
#00 20 * * * root /opt/repos/gardouille.scripts/github/check_self-service-password_update
### 2-1. Create a cron job with Self Service Password (SSP) directory as first argument, eg :
#00 20 * * * root /opt/repos/gardouille.scripts/github/check_self-service-password_update /var/www/self-service-password
### 3. Monitor the temp file : /tmp/.github.self-service-password.upgrade
# Or enable MAILTO in cronjob and edit the script to print a message.
# Or send a mail.
# …
## }}}
# }}}

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

check.self-service-password.update  --
Compare current version of an installed Self Service Password (SSP) and the last available.

EXAMPLE :
    - Compare the current version installed from .deb file
        check.self-service-password.update

    - Compare the current version installed from sources in /var/www/self-service-password
        check.self-service-password.update /var/www/self-service-password

HELP

	exit 1
fi
# }}}

# Vars {{{
DEBUG=1

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

ssp_repo_url="https://github.com/ltb-project/self-service-password"
if [ $# -eq 1 ]  ## If source directory should be used
then
	ssp_install_dir="${1}"
	ssp_current_version=$(find "${ssp_install_dir}" -iname index.php -exec grep -- "^\$version" {} \; | cut -d'"' -f2)

	ssp_new_version=$("${script_wd}"/releasetags "${ssp_repo_url}" | head -n1)
else  ## If .deb file should be used
	ssp_current_version=$(dpkg -l self-service-password | awk '/^ii.*self-service-password/ { print $3}' | sed 's/\(.*\)-.*/\1/')

	ssp_new_version=$("${script_wd}"/releasetags "${ssp_repo_url}" | head -n1 | sed 's/v//g')
fi

ssp_new_version_file="/tmp/.github.self-service-password.upgrade"
# }}}

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

	## Create a temp file to monitor
	touch -- "${ssp_new_version_file}"
	printf '\e[1;35m%-6s\e[m\n' "An upgrade is available for Self Service Password/SSP (current : ${ssp_current_version}) : ${ssp_new_version}." >> "${ssp_new_version_file}"

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

exit 0