#!/bin/sh

xdg_user_dir=$XDG_DATA_HOME
[ -n "$xdg_user_dir" ] || xdg_user_dir=$HOME/.local/share

xdg_data_dirs=$XDG_DATA_DIRS
[ -n "$xdg_data_dirs" ] || xdg_data_dirs=/usr/local/share/:/usr/share/
for x in `echo $xdg_data_dirs | sed 's/:/ /g'` ; do
    if [ -w $x/applications/ ] ; then
        xdg_global_dir=$x
        break
    fi
done
[ -w $xdg_global_dir ] || xdg_global_dir=

kde_user_dir=$HOME/.kde/applnk
kde_global_dir=/usr/share/applnk
[ -w $kde_global_dir ] || kde_global_dir=

gnome_user_dir=$HOME/.gnome/apps
gnome_global_dir=/usr/share/gnome/apps
[ -w $gnome_global_dir ] || gnome_global_dir=

usage()
{
    echo Usage:
    echo  $0 "[--root|--user] [--create desktop|--delete desktop]"
    echo "Where --user (install only for the user file) is the default."
    echo One of --create or --delete must be specified.
    echo With --create, the file specified must exist and be a valid XDG .desktop file
    echo With --delete, the file must be a pattern that will exist
}


mode=user
action=
while [ $# -gt 0 ] ; do
    parm=$1
    shift

    case $parm in
      --create)
        if [ ! -f "$1" ] ; then
            echo Error:  You must specify a valid desktop file as a paramter to --create.
            exit 1
        fi
        if [ -n "$action" ] ; then
            echo Error:  You must specify only one of --create or --delete
            exit 1
        fi

        action=create
        desktop_file=$1
        shift
        ;;

      --delete)
        if [ -z "$1" ] ; then
            echo Error:  You must specify a desktop file name as a paramter to --delete.
            exit 1
        fi
        if [ -n "$action" ] ; then
            echo Error:  You must specify only one of --create or --delete
            exit 1
        fi
        action=delete
        desktop_file=$1
        shift
        ;;

      --user)
        mode=user
        ;;

      --root)
        mode=root
        ;;

      *)
        echo "$parm:  Invalid parameter/option"
        usage
        exit 2
        ;;
    esac
done

if [ -z "$action" ] ; then
    usage
    exit 2
fi

desktop_dir=
if [ "$mode" = "user" ] ; then
    xdg_dir=$xdg_user_dir/applications
    kde_dir=$kde_user_dir
    gnome_dir=$gnome_user_dir
    my_umask=077
    if [ -d $HOME/Desktop -a -w $HOME/Desktop ] ; then
        desktop_dir=$HOME/Desktop
    fi
else
    xdg_dir=$xdg_global_dir/applications
    kde_dir=$kde_global_dir
    gnome_dir=$gnome_global_dir
    my_umask=022
fi

#echo "[xdg|$xdg_user_dir|$xdg_global_dir]"
#echo "[kde|$kde_user_dir|$kde_global_dir]"
#echo "[gnome|$gnome_user_dir|$gnome_global_dir]"

#echo "[using|$xdg_dir|$kde_dir|$gnome_dir]"


case $action in 
    create)
        save_umask=`umask`
        umask $my_umask
        basefile=`basename $desktop_file`

        for x in $xdg_dir $kde_dir $gnome_dir $desktop_dir ; do
            mkdir -p $x
            cp $desktop_file $x
        done

        if [ -f $kde_dir/$basefile ] ; then
            echo "OnlyShowIn=Old;" >> $kde_dir/$basefile
        fi

        if [ -f $gnome_dir/$basefile ] ; then
            echo "OnlyShowIn=Old;" >> $gnome_dir/$basefile
        fi

        umask $save_umask
        ;;

    delete)
        for x in $xdg_dir $kde_dir $gnome_dir $desktop_dir ; do
            rm -f $x/$desktop_file
        done
        
        ;;
esac