#!/usr/bin/env bash

PLUGIN_BASE='/opt/cisco/secureclient/bin/plugins'

read -r -d '' USAGE << EGASU
Usage: `basename $0` [-s|-e|-d|-h]

    -s, --status    Print Umbrella Roaming Security module status
    -e, --enable    Enable Umbrella Roaming Security module
    -d, --disable   Disable Umbrella Roaming Security module
    -h, --help      Show this message.
EGASU

# Check plugin status, return 0 if enabled, 1 if disabled
function check_status {
    [[ -f $PLUGIN_BASE/libacumbrellaapi.dylib ]] &&
    [[ -f $PLUGIN_BASE/libacumbrellactrl.dylib ]] &&
    [[ -f $PLUGIN_BASE/libacumbrellaplugin.dylib ]]
}

# Check if plugin disabled by utility, return 0 if yes, 1 if no
function verify_plugin_disabled {
    [[ -f $PLUGIN_BASE/disabled/libacumbrellaapi.dylib ]] &&
    [[ -f $PLUGIN_BASE/disabled/libacumbrellactrl.dylib ]] &&
    [[ -f $PLUGIN_BASE/disabled/libacumbrellaplugin.dylib ]]
}

# Disable plugin
function disable_plugin {
    sudo mkdir -p $PLUGIN_BASE/disabled
    sudo mv -f $PLUGIN_BASE/libacumbrellaapi.dylib $PLUGIN_BASE/libacumbrellactrl.dylib $PLUGIN_BASE/libacumbrellaplugin.dylib $PLUGIN_BASE/disabled
}

# Enable plugin
function enable_plugin {
    sudo mv -f $PLUGIN_BASE/disabled/libacumbrellaapi.dylib $PLUGIN_BASE/disabled/libacumbrellactrl.dylib $PLUGIN_BASE/disabled/libacumbrellaplugin.dylib $PLUGIN_BASE/
}

case "$1" in
    '-s'|'--status')
        check_status &&
        echo Umbrella Roaming Security Module for AnyConnect is ENABLED. ||
        echo Umbrella Roaming Security Module for AnyConnect is DISABLED.
        exit 0
        ;;
    '-e'|'--enable')
        verify_plugin_disabled &&
        enable_plugin &&
        echo Umbrella Roaming Security Module for AnyConnect has been ENABLED. &&
        exit 0 ||
        echo ERROR: Umbrella Roaming Security Module for AnyConnect can only be enabled if it has previously been disabled by this utility.
        exit 1
        ;;
    '-d'|'--disable')
        check_status &&
        disable_plugin &&
        echo Umbrella Roaming Security Module for AnyConnect has been DISABLED. ||
        echo ERROR: Umbrella Roaming Security Module for AnyConnect does not appear to be enabled.
        exit 1
        ;;
    '-h'|'--help')
        echo "$USAGE"
        exit 0
        ;;
    *)
        echo "$USAGE"
        exit 1
        ;;
esac