#!/bin/bash
#
# Compare installed versions with latest release
#
# Erik A. Espinoza <espinoza@forcenetworks.com>
# Eric 'shubes' <ejs@shubes.net>
# Jake Vickers <jake@v2gnu.com>
#
###################################################################
# Change Log
# 07/15/2009 shubes: added qtp-whatami so $BUILD_DIR is available
# 05/04/2009 shubes: added current version to message
#                    Thanks to Kent Busbee for this enhancement
# 04/05/2008 shubes: replaced reorg fix with call to qtp-get-pkg-list
# 10/25/2007 Jake  : Fixed a bug in the reorganization portion of the script
# 06/25/2007 Jake  : Added scripting to reorganize the current.txt file that
#                    was being downloaded so that it's in the correct installation
#                    order, instead of alphabetical order.
# 03/09/2007 shubes: removed QMT_QMTVER which was moved into compare function
# 03/06/2007 shubes: fixed version checking for stock zlib
# 01/09/2007 shubes: added logic for >< version comparison
#                    added option to check development
# 09/06/2006 shubes: Eliminated variables, renamed for qtp package
# 06/13/2006 shubes: Restructured for maintainability by Eric 'shubes'
# 07/29/2005 espinoza: Bugfix - Changed QMAD to QMAL for qmail-toaster detection
# 07/27/2005 espinoza: Initial Release
###################################################################
## initialization
# If server list is unavailable, notify the user
#
a1_initialization(){

. qtp-whatami -s
. qtp-config -s
if [ "$usedevel" ]; then
  devlist=`wget -q -O - ${QMT_DEV}/info/current.txt`
fi

pkglist=$(qtp-get-pkg-list ${QMT_WEB}/info/current.txt)

if [ -z "$pkglist" ]; then
  message="Package List Unavailable"
  q01_error_exit
fi
}

###################################################################
## put list of upgrades available in templist
#
a3_check_each_package(){

QMT_PKGNAME=${QMT_PKG%-[^-]*-[^-]*.src.rpm}

if [ ! -z "$devlist" ] \
      && [ "$QMT_PKG" == "$QMT_PKGNAME" ]; then
  b32_get_stable_package
fi

QMT_PKGVER=${QMT_PKG%.src.rpm}
QMT_PKGNAME=${QMT_PKGVER%-[^-]*-[^-]*}
QMT_VERSION=${QMT_PKGVER#${QMT_PKGNAME}-}
installed_pkgver=`rpm -q ${QMT_PKGNAME}`

if [ $? == "0" ] \
      && [ "$installed_pkgver" != $QMT_PKGVER ]; then
  x01_compare_versions
  if [ "$?" == "0" ]; then
    echo -e " available: $QMT_PKGVER\n(installed: $installed_pkgver)" >>$templist
  fi
fi
}

###################################################################
## use stable package version
#
b32_get_stable_package(){

QMT_PKG=""
for pkg in $pkglist; do
  if [ "$QMT_PKGNAME" == ${pkg%-[^-]*-[^-]*.src.rpm} ]; then
    QMT_PKG=$pkg
    break
  fi
done

if [ -z "$QMT_PKG" ]; then
  message="$me - program bug - stable package $QMT_PKGNAME not found"
  q01_error_exit
fi
}

###################################################################
## Notify user of new packages 
#
a5_notify_user(){

if [ "$SEND_EMAIL_TO" ]; then
  if [ -f $templist ]; then
    mail -s "New Qmail-Toaster Packages Available" $SEND_EMAIL_TO <$templist
  fi
else
  if [ -f $templist ]; then
    echo "New Qmail-Toaster Packages Available:"
    cat $templist
  else
    echo "No New Qmail-Toaster Packages Available"
  fi
fi
}

###################################################################
## send an error message and exit
#
q01_error_exit(){

if [ "$SEND_MAIL_TO" ]; then
  echo "$message" | mail -s "$me Error" $SEND_EMAIL_TO
else
  echo "$message"
fi
exit 1
}

###################################################################
## main script execution begins here
#
me=${0##*/}
myver=v0.4.1

usedevel=""
while (( "$#" )); do
  case $1 in
    "-h" | "-help" )
      echo "$me $myver usage: $me [-d] [mailto]"
      exit 1
      ;;
    "-d" | "-dev" | "-devel" | "-develop" )
      usedevel=y
      ;;
    * )
      SEND_EMAIL_TO=$1
      ;;
  esac
  shift
done

# set a temp file and make sure it's deleted when we're done
templist=$(tempfile 2>/dev/null) || templist=/tmp/$me.$$
trap "rm -f $templist" 0 1 2 5 15

a1_initialization

for QMT_PKG in ${devlist:-${pkglist}}; do
  a3_check_each_package
done

a5_notify_user

exit 0