#!/bin/sh

set -e

[ "$DEBIAN_SCRIPT_DEBUG" ] && set -x 

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

mv_old_backups() {

	# Clean up /etc, nove old jun^H^H^Hbackups where they belong
	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
}


reload=""
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 squirrelmail-cn $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."
			reload="reload"
		else
			echo "... no changes."
		fi
        fi
fi


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

# Include Squirrelmail apache.conf in Apache2 web server configuration
# (directory /etc/apache2/conf.d/), but only if we are not present in 
# Apache2 configuration at all.
#
# We're using listconffiles from apache-common Debian package. Yes, 
# it works with Apache2 configurations too.
#
apache2listconf=`/usr/share/apache/listconffiles -V $hconf | tr '' ' ' | grep "$CONF"` || true
apache2squirrel=`ls -l /etc/apache2/conf.d/ | grep "$CONF"` || true

if [ -z "$apache2listconf" -a -z "$apache2squirrel" ]; then
	ln -s "$CONF" /etc/apache2/conf.d/squirrelmail-cn.conf
	reload=reload
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.jpg/;
	/^[ 	]*\\\$org_logo[ 	]*=/s/sm_logo\.png/sm_carnet_logo.jpg/;
	/^[ 	]*\\\$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\//;
	"

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

# 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

# Would there be any changes, perhaps?
#
if cp_check_and_sed '.' "$seddef" "$CONF"; then
	changed=1
fi

if grep -q x62 "$CONF"; then
	really_old_config=1
fi


#
# MORE FIXES...
#

# Global $config_version;
#
if ! egrep -q '^[ 	]*global[ 	]+\$config_version' "$CONF"; then
	really_old_config=1
	#echo "CN: Adding \"global \$config_version;\" to config.php."
	perl -p -e 'print "global \$config_version;\n" if (/^\s*\$config_version/);' \
		"$CONF" > "$CONF.tmp"
	cp_mv "$CONF.tmp" "$CONF"
fi

# This was missing on some machines
#
if ! egrep -q '^[ 	]*\$allow_thread_sort' $CONF; then
	to_add='\$allow_thread_sort = false;\n'
	cp_echo "CN: Adding \"\$allow_thread_sort\"."
	perl -p -e 'if (! $a && /^\s*\$edit_name/) {
                 $_ .= "'"$to_add"'"; $a = 1; }
              elsif (! $a && /^\?>/) {
                 $_ = "'"$to_add"'" . $_; $a = 1; }' \
	$CONF > "$CONF.tmp"
	cp_mv "$CONF.tmp" "$CONF"
fi

# Shouldn't use /etc/hostname, especially if it contains only the host part
# replace
#   $domain = implode('', file('/etc/hostname'));
# with
#   $domain = trim(implode('',file('/etc/'.(file_exists('/etc/mailname')?'mail':'host').'name')));
#
if egrep -q "^[[:blank:]]*\\\$domain[[:blank:]]*=[[:blank:]]*implode\\('',[[:blank:]]*file\\('/etc/hostname'\\)\\);" $CONF; then
	nodots=
	nomailname=
	grep -q '\.' /etc/hostname || nodots=1
	[ -e /etc/mailname ] || nomailname=1
	if cp_check_and_sed "^[[:blank:]]*\\\$domain[[:blank:]]*=[[:blank:]]*implode\\('',[[:blank:]]*file\\('/etc/hostname'\\)\\);" \
                   "s|^[ \t]*\\\$domain[ \t]*=[ \t]*implode('',[ \t]*file('/etc/hostname'));|\$domain = trim(implode('',file('/etc/'.(file_exists('/etc/mailname')?'mail':'host').'name')));|" \
                   $CONF; then
		cp_echo "CN: config.php updated to use either /etc/mailname or /etc/hostname"
	fi
fi


# Generate hr_HR locale if needed.
#
if ! egrep -q '^hr_HR ISO-8859-2\b' /etc/locale.gen; then
	if [ -f /etc/locale.gen ]; then
		echo "hr_HR ISO-8859-2" >> /etc/locale.gen
		cp_echo "CN: Added hr_HR locale to /etc/locale.gen."
	else
		echo "hr_HR ISO-8859-2" > /etc/locale.gen
		cp_echo "CN: /etc/locale.gen created."
	fi
	dpkg-reconfigure -f noninteractive locales
fi


# Check Apache2 web server for restart/reload.
#
if [ -n "$reload" ]; then

	# Restart Apache2 web server.
	if [ -x "/etc/init.d/apache2" ]; then
	        if [ -x "`which invoke-rc.d 2>/dev/null`" ]; then
                    invoke-rc.d apache2 "$reload" || exit $?
	        else
                    /etc/init.d/apache2 "$reload" || exit $?
	        fi
	fi
fi


# Warn user of really old config file
#
if [ "$really_old_config" ]; then
	echo
	echo "CN: You have a really old config file."
	cp_echo -m "CN: Old \"$CONF\" detected during installation."
	cp_echo "CN  The known bad options were fixed, but it is _strongly_ recommended that"
	cp_echo "CN  you either copy over the new template, and reconfigure this package"
	cp_echo
	cp_echo "    cp $TMPL $CONF"
	cp_echo "    dpkg-reconfigure squirrelmail-cn"
	cp_echo
	cp_echo "CN  or use squirrelmail-configure (conf.pl) to generate a fresh"
	cp_echo "    ${CONF} file."
	echo
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."
fi

# Mail root
#
cp_mail "$PKG"

exit 0