#!/bin/sh

set -e

[ "$DEBIAN_SCRIPT_DEBUG" ] && set -x

# Source debconf library.
. /usr/share/debconf/confmodule

case "$1" in
    configure)
        # continue below
        ;;

    abort-upgrade|abort-remove|abort-deconfigure)
        exit 0
        ;;

    *)
        echo "postinst called with unknown argument \`$1'" >&2
        exit 0
        ;;
esac


PKG=squirrelmail-cn
domainname=`dnsdomainname`
FQDN=`hostname --fqdn`

# Include CARNet functions
. /usr/share/carnet-tools/functions.sh
unset CP_ECHO_RETURN


if [ -e /usr/share/apache2/apache2-maintscript-helper ]; then
    . /usr/share/apache2/apache2-maintscript-helper

    squirrelmail_enable() {
        cp_echo "CN: Enabling $PKG configuration for Apache2."
        return 0
    }
else
    cp_echo "CN: Could not load Apache 2.4 maintainer script helper."

    squirrelmail_enable() {
        return 1
    }
fi

mv_old_backups () {
    # Clean up /etc, nove old jun^H^H^Hbackups where they belong
    local glob="$1.old.*-*-*.*:*:*"

    # ${glob%/*} (dirname $glob) does not work for files in root
    if [ -n "$(find ${glob%/*} -name ${glob##*/})" ]; then
        for i in $(find ${glob%/*} -name ${glob##*/})
        do
            cp_backup_conffile "$i" "$2"
            rm -f "$i"
        done
    fi
}

# listconffiles ()
#
#   Recursively walks /etc/apache2/apache2.conf for Include and
#   IncludeOptional directives.
#   Returns all configfiles so defined.
#
listconffiles () {
    local i incs
    local base_dir="`dirname $1`"

    incs=`awk 'tolower($1) ~ /include(optional)?/ { sub("/$","/*",$2); print $2; }' $1`
    incs=`echo "$incs" | sed -r "s#^([^/])#${base_dir}/\1#"`
    if [ -n "$incs" ]; then
        for i in $incs; do
            if [ -e "$i" ]; then echo "`readlink -m -q $i`"; listconffiles "$i"; fi
        done
    fi
}

# genlocales ()
#
#   Update/generate localisation files from templates if locales-all
#   is not installed.
#
genlocales () {
    if [ -f /usr/lib/locales-all/supported.tar.lzma ] ; then
        cp_echo "CN: locales-all installed, skipping locales generation."
    else
        locale-gen
    fi
}


DATE=`date +%Y-%m-%d.%H:%M:%S`
CONFDIR=/etc/squirrelmail
CONF=$CONFDIR/apache.conf

backup_name=squirrelmail_apache.conf
mv_old_backups $CONF $backup_name

# Check Apache2 web server configuration.
#
if [ -f "$CONF" ]; then

    # Backup first.
    if cp_check_and_backup "$CONF" "$backup_name"; then
        cp_echo "CN: Old $CONF saved as \"/var/backups/$backup_name.bak\"."
    fi

    # Check if we already modified apache.conf
    if ! egrep -q "^[ 	]+RewriteRule \. https" "$CONF"; then
        echo -n "CN: Updating Apache2 configuration for Squirrelmail"
        perl -n -e 'print if ! m|^Alias\s*/webmail|' "$CONF" > $CONF.tmp

        cp-update -t $PKG $CONF.tmp <<-EOF
# Force SSL for /webmail -> you can still use /squirrelmail
Alias /webmail /usr/share/squirrelmail

<IfModule mod_rewrite.c>
  <IfModule mod_ssl.c>
    <Location /webmail>
      RewriteEngine on
      RewriteCond %{HTTPS} !=on
      RewriteRule . https://%{HTTP_HOST}%{REQUEST_URI}  [L]
    </Location>
  </IfModule>
</IfModule>

#
# WARNING: This file is automatically included in each VirtualHost
# entry you might have.  Do not enable the VirtualHost example provided
# in this file, it WILL break your Apache configuration. Copy the
# VirtualHost section to the standard webserver configuration file
# instead.
#
EOF
        cp_mv $CONF.tmp $CONF

        # This will break if cp_backup_conffile ever changes destination path
        if ! cmp -s "$CONF" "/var/backups/$backup_name.bak"; then
            echo "."
            cp_echo "CN: Updated Apache2 configuration for Squirrelmail."
        else
            echo "... no changes."
        fi
    fi
fi


hconf=/etc/apache2/apache2.conf
sconf=/etc/apache2/sites-available/ssl

# Remove obsolete symbolic link.
#
if [ "`readlink -q -m /etc/apache2/conf.d/$PKG.conf`" = "$CONF" ]; then
    rm -f /etc/apache2/conf.d/$PKG.conf
fi

# Include Squirrelmail apache.conf in Apache2 web server configuration,
# but only if we are not present in Apache2 configuration at all.
#
apache2listconf=`listconffiles "$hconf" | grep "$CONF"` || true

if [ -z "$apache2listconf" ]; then
    if [ ! -L /etc/apache2/conf-available/$PKG.conf -a ! -f /etc/apache2/conf-available/$PKG.conf ]; then
        ln -sf "$CONF" /etc/apache2/conf-available/$PKG.conf
    fi
fi


# Initial CARNet config tweaks.
#
CONF="$CONFDIR/config.php"
TMPL="$CONFDIR/config_default.php"
mv_old_backups "$CONF" "`basename $CONF`"
if cp_check_and_backup "$CONF"; then
    cp_echo "CN: Old $CONF saved as \"/var/backups/${CONF##*/}.bak\"."
fi

# We use sed to replace old defaults with ours.
# Must escape \$ because of shell expansion.
#
seddef="/^[ 	]*\\\$org_logo[ 	]*=/s/sm_logo\.jpg/sm_carnet_logo.png/;
        /^[ 	]*\\\$org_logo[ 	]*=/s/sm_logo\.png/sm_carnet_logo.png/;
        /^[ 	]*\\\$org_logo[ 	]*=/s/sm_carnet_logo\.jpg/sm_carnet_logo.png/;
        /^[ 	]*\\\$domain[ 	]*=/s/mydomain\.com/$domainname/;
        /^[ 	]*\\\$default_charset[ 	]*=/s/iso-8859-1/iso-8859-2/;
        /^[ 	]*\\\$org_logo_width[ 	]*=/s/308/0/;
        /^[ 	]*\\\$org_logo_height[ 	]*=/s/111/0/;
        /^[ 	]*\\\$squirrelmail_default_language[ 	]*=/s/en_US/hr_HR/;
        /^[ 	]*\\\$data_dir[ 	]*=/s/\.\.\/data\//\/var\/lib\/squirrelmail\/data\//;
        "

# Left frame size to 220px.
# $default_left_size = '220';
#
db_get squirrelmail-cn/leftwidth || true
if [ "$RET" = "true" ]; then
    seddef="$seddef/^[ 	]*\\\$default_left_size[ 	]*=/s/'[0-9]*'/'220'/;
        "
fi

# Change CSS file for Squirrelmail.
# $theme_css = SM_PATH . 'themes/css/squirrelmail-cn.css';
#
db_get squirrelmail-cn/themecss || true
if [ "$RET" = "true" ]; then
    seddef="$seddef/^[ 	]*\\\$theme_css[ 	]*=/s/=.*/= SM_PATH . 'themes\/css\/squirrelmail-cn.css';/;
        "
fi

db_stop || true

# Check for our dovecot package; if it is installed, assume it's used.
#
if dpkg -l dovecot-cn 2>/dev/null | grep -q '^ii'; then
    seddef="$seddef/^[ 	]*\\\$imap_server_type[ 	]*=/ {s/cyrus/dovecot/;s/other/dovecot/;s/uw/dovecot/}
        "
fi

cp_check_and_sed '.' "$seddef" "$CONF" || true


# Check /etc/hostname and /etc/mailname, because
#   $domain = trim(implode('', file('/etc/'.(file_exists('/etc/mailname')?'mail':'host').'name')));
#
nodots=
nomailname=
grep -q '\.' /etc/hostname || nodots=1
[ -e /etc/mailname ] || nomailname=1


# Check for hr_HR locale.
#
if [ -f /etc/locale.gen ]; then
    if ! egrep -q '^hr_HR ISO-8859-2\b' /etc/locale.gen; then
        echo "hr_HR ISO-8859-2" >> /etc/locale.gen
        cp_echo "CN: Added hr_HR locale to /etc/locale.gen."
        genlocales
    fi
else
    echo "hr_HR ISO-8859-2" > /etc/locale.gen
    cp_echo "CN: /etc/locale.gen created."
    genlocales
fi


# Mailname info...
#
if [ "$nodots" -o "$nomailname" ]; then
    cp_echo
    cp_echo "CN: Make sure that /etc/mailname contains a fully qualified domain name"
    cp_echo "CN  of this machine!  Sending mail via squirrelmail might fail if the FQDN"
    cp_echo "CN  cannot be found in either /etc/mailname or /etc/hostname."
    cp_echo "CN  Read mailname(5) man page for details."
    cp_echo -mailonly "CN  If this machine receives mail for both user@`hostname -f` and "
    cp_echo -mailonly "CN  user@`hostname -d`, you can also put just the domain in there."
    cp_echo
fi

if squirrelmail_enable; then
    apache2_invoke enconf $PKG
fi

if ! apache2ctl configtest >/dev/null 2>&1; then
    cp_echo "CN: Your Apache2 configuration seems to be broken."
    cp_echo "CN: Please, check the service after the installation finishes!"
fi

# Mail root
#
cp_mail "$PKG"

#DEBHELPER#

exit 0