#!/bin/sh
# vim: tw=100:

# This file is part of Background Music.
#
# Background Music is free software: you can redistribute it and/or
# modify it under the terms of the GNU General Public License as
# published by the Free Software Foundation, either version 2 of the
# License, or (at your option) any later version.
#
# Background Music is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Background Music. If not, see <http://www.gnu.org/licenses/>.

#
# preinstall
#
# Copyright © 2017 Kyle Neideck
#

PATH=/bin:/sbin:/usr/bin:/usr/sbin; export PATH

# Show a warning if we can't find a safe dir to install BGMXPCHelper in. Should be very unlikely.
xpc_helper_path="$(bash safe_install_dir.sh -y)"

if [ "$(bash safe_install_dir.sh "$xpc_helper_path")" != "1" ]; then
    # TODO: This message could be more user friendly.
    msg="We need to install a helper app called BGMXPCHelper to ${xpc_helper_path}, but it may not "
    msg+="be secure to do so.\n\n"
    msg+="${xpc_helper_path} and all of its parent directories should be owned by 'root', with the "
    msg+="group 'wheel', and have permissions 755 (rwxr-xr-x).\n\n"
    msg+="Background Music will still work if you decide to continue."

    if [ "$COMMAND_LINE_INSTALL" == "1" ]; then
        # As far as I can tell, we can't print anything the user is likely to see.
        logger "WARNING: $msg"
        exit 1
    else
        if ! osascript <<EOT
            tell application id "com.apple.systemuiserver"
                display alert "Warning" \
                    message "$msg" \
                    buttons {"Cancel", "Install Anyway"} \
                    default button "Cancel" \
                    cancel button "Cancel" \
                    as warning
            end tell
EOT
        then
            exit 1
        fi
    fi
fi

exit 0