#!/bin/sh

set -e

[ "$1" = "configure" ] || exit 0
[ "$DEBIAN_SCRIPT_DEBUG" ] && set -vx

hostname=`hostname -f`
cron="/etc/cron.d/amavis-stats"
htpasswd="/usr/share/amavis-stats/.htpasswd"
aconf="/etc/amavis-stats/apache.conf"
# these two are used in mail
package="amavis-stats-cn"
version="0.1.12-2"

notify () {
  if [ "x$1" = "x-mailonly" ]; then
    shift
  else
    echo "$1"
  fi
  NOTICE="$NOTICE$1"
  if [ `echo "$1" | wc -l` -eq 1 ]; then
    NOTICE="$NOTICE
"
  fi
}

if [ ! -f $htpasswd ]; then
	passwd=`makepasswd`
	htpasswd -bc $htpasswd admin $passwd 2> /dev/null
	notify "CN: amavis-stats URL is http://$hostname/amavis-stats/"
	notify "CN:         User: admin"
	notify "CN:         Password: $passwd"
	notify "CN: Use \"htpasswd $htpasswd admin\" to change it."
	notify ""
fi

# find out where the logs might lie
cant_figure_out() {
  notify "CN: Can't figure out log file, edit $cron yourself!" 1>&2
}

sl=/etc/syslog.conf 
if grep -q /var/log/mail.info $cron; then
  if [ ! -e "$sl" ]; then
    # no syslog.conf
    cant_figure_out
  elif pgrep syslog-ng > /dev/null; then
    # syslog-ng, I'm not parsing _that_.
    cant_figure_out
  elif ! grep -q '^mail.info[ 	][ 	]*-?/var/log/mail.info' $sl; then
    # where oh where does mail.info go to?
    log=$(awk '$1 == "mail.info" {print $2}' < $sl | sed 's/^-//' | head -1)
    [ -z "$log" ] && \
      log=$(awk '$1 == "mail.*" {print $2}' < $sl | sed 's/^-//' | head -1)
    [ -z "$log" ] && \
      log=$(awk '$1 ~ /mail\.info/ {print $2}' < $sl | sed 's/^-//' | head -1)
    [ -z "$log" ] && \
      log=$(awk '$1 ~ /mail\.\*/ {print $2}' < $sl | sed 's/^-//' | head -1)
    if [ -z "$log" ]; then
      cant_figure_out
    else
      sed "s,/var/log/mail.info,$log,g" < "$cron" > "${cron}.dpkg-tmp"
      if ! cmp -s "${cron}.dpkg-tmp" "$cron"; then
        cp "${cron}.dpkg-tmp" "$cron"
        notify "CN: ${log} set as log file in ${cron}."
      fi
      rm "${cron}.dpkg-tmp"
    fi
  fi
fi  

# ash's [ continues after -a, so we need && here
if [ -f "$log" ] && [ "$(dirname $log)" = "/var/log/mail" ]; then
  logdirgroup=$(ls -ld /var/log/mail | awk '{print $4}')
  if [ "$logdirgroup" != "adm" ]; then
    # whyever was it not adm? on woody it's mail, on sarge smmsp...?
    # and i'm not going to give amavis-stats privileges for those
    notify "CN: chgrp adm /var/log/mail (was \"$logdirgroup\")."
    chgrp adm /var/log/mail 
    #chgrp smmsp /var/log/mail
    #addgroup amavis-stats smmsp > /dev/null
  fi
fi

if ! grep -iq 'valid-user' $aconf; then
  cat > ${aconf}.dpkg-tmp <<EOF
Alias /amavis-stats /usr/share/amavis-stats/

<Directory /usr/share/amavis-stats/>
    Options +FollowSymLinks
    AllowOverride None
    order allow,deny
    allow from all

    AuthType Basic
    AuthName amavis-stats
    AuthUserFile $htpasswd

    <Limit GET POST>
        require valid-user
    </Limit>
</Directory>
EOF
  # If default debian file, don't bother to save it
  if [ "$(md5sum $aconf|awk '{print $1}')" != "b6820ee83bc5b6386c72428f42950b6b" ]; then
    bak="$aconf.dpkg-old.$(date '+%Y-%m-%d')"
    if [ ! -f "$bak" ]; then
      cp -p "${aconf}" "$bak" 
      notify "CN: Old apache config saved as \"$bak\"."
    fi
  fi
  cp "${aconf}.dpkg-tmp" "$aconf"
  rm "${aconf}.dpkg-tmp"
  notify "CN: Forced valid-user for amavis-stats web."
  reload=1
fi

if [ "$(echo $NOTICE|wc -w)" -gt 0 ]; then
  echo "Mailing upgrade output to root."
  NOTICE="From: $package postinst script <root>
To: root
Subject: $package $version package install log
Date: $(/bin/date +'%a, %d %b %Y %H:%M:%S %z')
 
Hello!

The $package package has been successfully installed on your computer.
For your convenience, a partial output of the last $package installation
is included below.

----------
$NOTICE
----------"

  echo "$NOTICE" | /usr/sbin/sendmail -t &
  sleep 1
fi


if [ ! -L /etc/apache2/conf.d/amavis-stats-cn.conf -a ! -f /etc/apache2/conf.d/amavis-stats-cn.conf ]; then
  ln -sf /etc/amavis-stats/apache.conf /etc/apache2/conf.d/amavis-stats-cn.conf
  reload_apache2="yes"
fi

if [ "$reload_apache2" = "yes" ]; then
  if [ -x /usr/sbin/invoke-rc.d ]; then
    [ -x /etc/init.d/apache2 ] && invoke-rc.d apache2 reload || true
  else
    [ -x /etc/init.d/apache2 ] && /etc/init.d/apache2 reload || true
 fi
fi