#!/bin/bash
set -e

# RPM scenarios
#         install upgrade uninstall
# %pre    $1 == 1 $1 == 2 (N/A)
# %post   $1 == 1 $1 == 2 (N/A)
# %preun  (N/A)   $1 == 1 $1 == 0
# %postun (N/A)   $1 == 1 $1 == 0

ARG=
# In case of RPM based ditros. Map installation flags with Deb
if [ "$1" = "0" ]; then
    ARG="remove"
elif [ "$1" = "1" ]; then
    ARG="upgrade"
else
    ARG=$1
fi

if [ "$ARG" = "remove" ] || [ "$ARG" = "purge" ]; then
    rm -f /var/run/mde_netfilter.sock
    if [ -e /etc/os-release ]; then
        if [ -f /usr/lib/systemd/system/mde_netfilter.service ]; then   # RPM based distros
            systemctl disable mde_netfilter.service
            systemctl disable mde_netfilter.socket
            rm -f /usr/lib/systemd/system/mde_netfilter.*
        elif [ -f /lib/systemd/system/mde_netfilter.service ]; then     # DEB based distros
            systemctl disable mde_netfilter.service
            systemctl disable mde_netfilter.socket
            rm -f /lib/systemd/system/mde_netfilter.*
        fi
        systemctl daemon-reload
    fi
fi

exit 0