#!/bin/sh
# $Id: manage_pre,v 1.6 2009/09/21 18:00:06 andrew Exp $

local _pre_id='Palm, Pre, 0316'
#local _pre_label='Pre'
#local _ipod_label='iPod'
local _mount_dir='/mnt/pre'
local _name=`basename $0`
local _unison_config='vogonpa'

local _action="$*"
case "$_name" in
    eject_pre)
        _action=eject
        ;;
    sync_pre)
        _action=sync
        ;;
    mount_pre)
        _action=mount
        ;;
esac

if [ -z "$_action" ]; then
    echo "manage_pre mount|sync|eject"
    exit 255
fi

find_pre() {
    local _dev=`dmesg | grep 'Palm, Pre' | tail -1 | cut -d' ' -f 1`
    if [ X"$_dev" == X"" ]; then
        echo Pre not found! >&2
        exit 1
    fi

    local _id=`dmesg | grep "^$_dev at " | tail -1 | sed -e 's/.*<//' -e 's/>.*$//'`
    if [ X"$_id" != X"$_pre_id" ]; then
        echo "Pre [$_dev] not correct id [$_id]" >&2
        exit 2
    fi

    echo /dev/${_dev}i
}

is_mounted() {
    /sbin/mount | grep "^${_dev} "
}

eject() {
    local _mounted=`is_mounted $_dev`
    if [ X"" != X"$_mounted" ]; then
        /bin/sync
        $SUDO /sbin/umount $_dev && echo Unmounted Pre
    else
        echo Not mounted
    fi
    $SUDO /bin/eject  $_dev 2> /dev/null && echo Ejected Pre
    $SUDO rmdir $_mount_dir 2> /dev/null
}

mount() {
    local _mounted=`is_mounted $_dev`
    if [ X"" != X"$_mounted" ]; then
        echo Already mounted: ${_mounted%% type*}
        return
    fi
    $SUDO mkdir -p $_mount_dir
    $SUDO chgrp users $_mount_dir
    $SUDO chmod g+w   $_mount_dir
    $SUDO /sbin/mount $_dev $_mount_dir && echo Mounted Pre on $_mount_dir
}

synchronize() {
    local _mounted=`is_mounted $_dev`
    local _did_mount=""
    if [ X"" == X"$_mounted" ]; then
        mount || exit 255
        _did_mount=1
    fi

    echo Synchronizing Pre

    #if [ -e /usr/local/bin/rsync ]; then
        #rsync -rv --delete --size-only --exclude '*.pid' \
            #.backgrounds/vogonpa/ /mnt/pre/wallpapers_mine/
    #fi

    if [ -e /usr/local/bin/unison ]; then
        /usr/local/bin/unison $_unison_config -auto -batch -ui text
    fi

    if [ ! -z "$_did_mount" ]; then
        eject
    fi
}

local _dev=`find_pre`
if [ X"${_dev}" == X"" -o ! -e $_dev ]; then
    echo "Unable to find Pre!"
    exit 3
fi

local _a
for _a in $_action; do
    case "$_a" in 
        mount)
            mount
            ;;
        sync)
            synchronize
            ;;
        eject)
            eject
            ;;
        *)
            echo "Unrecognized action [$_a]"
            ;;
    esac
done