#! /bin/sh
# prerm script for livesupport
#
# see: dh_installdeb(1)

set -e

# summary of how this script can be called:
#        * <prerm> `remove'
#        * <old-prerm> `upgrade' <new-version>
#        * <new-prerm> `failed-upgrade' <old-version>
#        * <conflictor's-prerm> `remove' `in-favour' <package> <new-version>
#        * <deconfigured's-prerm> `deconfigure' `in-favour'
#          <package-being-installed> <version> `removing'
#          <conflicting-package> <version>
# for details, see http://www.debian.org/doc/debian-policy/ or
# the debian-policy package

installdir=/opt/campcaster
apache_docroot=/var/www
apache_group=www-data

if [ -d /etc/postgresql/8.1 ]; then
    postgresql_dir=/etc/postgresql/8.1/main
    postgresql_init_script=/etc/init.d/postgresql-8.1
elif [ -d /etc/postgresql/8.2 ]; then
    postgresql_dir=/etc/postgresql/8.2/main
    postgresql_init_script=/etc/init.d/postgresql-8.2
elif [ -d /etc/postgresql/8.3 ]; then
    postgresql_dir=/etc/postgresql/8.3/main
    postgresql_init_script=/etc/init.d/postgresql-8.3
else
    echo "no postgresql 8.1, 8.2 or 8.3 found" >&2
    exit 1
fi

ls_database=Campcaster
ls_dbuser=campcaster


#-------------------------------------------------------------------------------
#  Function to check for the existence of an executable on the PATH
#
#  @param $1 the name of the exectuable
#  @return 0 if the executable exists on the PATH, non-0 otherwise
#-------------------------------------------------------------------------------
check_exe() {
    if [ -x "`which $1 2> /dev/null`" ]; then
        return 0;
    else
        return 1;
    fi
}


case "$1" in
    remove|upgrade|deconfigure)
        # unmount the NFS share, if we have a 2-computer setup
        storagedir=$installdir/var/Campcaster/storageServer
        if [ "`mount | grep -o \"on $storagedir \"`" = "on $storagedir " ]; then
            echo "Unmounting the remote storage..."
            umount $storagedir
            touch $installdir/storageServer.wasMounted
        fi

        # stop the livesupport scheduler daemon
        /etc/init.d/campcaster-scheduler stop || true
        /etc/init.d/campcaster-scheduler kill || true

        # remove the init script
        rm -f /etc/init.d/campcaster-scheduler
        update-rc.d campcaster-scheduler remove || true
        
        # remove the ODBC data source and driver
        check_exe "odbcinst" || odbcinst_found=no

        if [ "x$odbcinst_found" != "xno" ] ; then
            odbcinst -u -s -l -n $ls_database
            odbcinst -u -d -n PostgreSQL_Campcaster
        fi

        # remove the symlink to the campcaster web pages
        rm -f $apache_docroot/campcaster
        
        # restore the old pg_hba.conf file
        if [ -f $postgresql_dir/pg_hba.conf ] \
            && [ -f $postgresql_dir/pg_hba.conf.before-campcaster ] ; then
            mv -f $postgresql_dir/pg_hba.conf.before-campcaster \
                    $postgresql_dir/pg_hba.conf ;
        fi

        # remove generated files
        rm -rf $installdir/etc/pear.conf
        rm -rf $installdir/var/Campcaster/htmlUI/var/html/img/*
        rm -rf $installdir/var/Campcaster/htmlUI/var/templates_c/*
        rm -rf $installdir/var/Campcaster/archiveServer/var/access/*
        rm -rf $installdir/var/Campcaster/archiveServer/var/trans/*
        rm -rf $installdir/var/Campcaster/storageServer/var/access/*
        rm -rf $installdir/var/Campcaster/storageServer/var/trans/*
    ;;
    
    failed-upgrade)
    ;;
    
    *)
        echo "prerm called with unknown argument \`$1'" >&2
        exit 1
    ;;
esac

# dh_installdeb will replace this with shell code automatically
# generated by other debhelper scripts.

#DEBHELPER#

exit 0