#!/bin/sh

set -e

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


# Load debconf
. /usr/share/debconf/confmodule

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

PKG="squirrelmail-change-pass-cn"
VERSION="3.0-2"
SQCONFDIR="/etc/squirrelmail"
SQCONF="$SQCONFDIR/config.php"
SQCPCONF="$SQCONFDIR/config_change_pass.php"
CPCONF="/usr/share/squirrelmail/plugins/change_pass/config.php"
need_restart=0
min_pass_changed=0
temp_files=

set_min_pass_length () {

    local sed_re conf_file
    conf_re="$1"
    conf_file="$2"
    temp_files="$temp_files $conf_file.dpkg-tmp"

    sed "$conf_re" "$conf_file" > "$conf_file.dpkg-tmp"

    if ! cmp -s "$conf_file" "$conf_file.dpkg-tmp" 2>&1 >/dev/null; then
        cp_mv "$conf_file.dpkg-tmp" "$conf_file"
        min_pass_changed=1
    else
        rm -f "$conf_file.dpkg-tmp"
    fi
}

cleanup () {

    if [ -n "$temp_files" ]; then
        for temp_item in $temp_files; do
            if [ -e "$temp_item" ]; then
                rm -f $temp_item
            fi
        done
    fi
}

trap cleanup 0 1 2 15


# Configure poppassd to refuse connection from all hosts
# but localhost (127.0.0.1).
#
if [ ! -f /etc/hosts.deny ]; then
    touch /etc/hosts.deny
fi
if ! egrep -q '^poppassd:' /etc/hosts.deny; then
    echo "poppassd: ALL" | cp-update "$PKG" /etc/hosts.deny
fi
if [ ! -f /etc/hosts.allow ]; then
    touch /etc/hosts.allow
fi
if ! egrep -q '^poppassd:' /etc/hosts.allow; then
    echo "poppassd: 127.0.0.1" | cp-update "$PKG" /etc/hosts.allow
fi


# Configure SquirrelMail change_pass plugin - using defaults,
# no configuration files if earlier version is older than 3.0-1.
#
if [ "$2" ] && dpkg --compare-versions $2 lt 3.0-1; then

    cp_echo "CN: This version of change_pass plugin contains major changes."
    cp_echo "CN: For detailed description, see documentation in /usr/share/doc/$PKG/."

    if [ -f "$SQCPCONF" ]; then
        mv -f "$SQCPCONF" "$SQCPCONF.cn-old"
        cp_echo "CN: Old $SQCPCONF disabled and renamed to $SQCPCONF.cn-old."
    fi
    if [ -f "$CPCONF" ]; then
        mv -f "$CPCONF" "$CPCONF.cn-old"
        cp_echo "CN: Old $CPCONF disabled and renamed to $CPCONF.cn-old."
    fi
fi


# Check for change_pass configuration file and notify user about
# minimum password length configuration.
#
if [ ! -f "$SQCPCONF" ] && [ ! -f "$CPCONF" ]; then

    # Configuration file does not exist.
    cp_echo "CN: Generating new file $CPCONF"
    cat > "$CPCONF" <<EOF
<?php
//// Begin - Generated by CARNet package $PKG
//
//  REMOVE this whole block if you DON'T WANT $PKG
//  to edit your configuration file.
//
//// End - Generated by CARNet package $PKG
    \$min_pass_length = 8;

    // The default server is the configured IMAP server
    #\$poppass_server = 'localhost';

    // The default port is 106
    #\$poppass_port = 106;

    \$max_pass_length = 9999999;
EOF
    min_pass_changed=1
else

    # Checking for configuration file/s and minimum password length.
    echo "CN: Checking for minimum password length configuration."
    cn_tag_re="^\/\/\/\/ Begin - Generated by CARNet package $PKG$"

    for cpconf_file in $SQCPCONF $CPCONF; do

        min_pass_changed=0
        if [ -f "$cpconf_file" ]; then

            seddef="/^[[:space:]]*\\\$min_pass_length[[:space:]]*=[^;]*;[[:space:]]*$/d;
                    s/\\\$min_pass_length[[:space:]]*=[^;]*;//g;"

            if egrep -q "$cn_tag_re" "$cpconf_file"; then

                # Configuration file is tagged by CARNet.
                seddef="$seddef /^\/\/\/\/ End - Generated by CARNet package $PKG$/s/\(.*\)/\1\n"
                seddef="$seddef    \\\$min_pass_length = 8;/"

                set_min_pass_length "$seddef" "$cpconf_file"
            else

                if [ "$2" ] && dpkg --compare-versions $2 lt 3.0-2; then

                    # Add CARNet package info lines to config's header and set up $min_pass_length.
                    seddef="$seddef 0,/?>/s/^[[:space:]]*\(<?php\|<?\)\(.*\)/\1\n"
                    seddef="$seddef\/\/\/\/ Begin - Generated by CARNet $PKG\n\/\/\n"
                    seddef="$seddef\/\/  REMOVE this whole block if you DON'T WANT $PKG\n"
                    seddef="$seddef\/\/  to edit your configuration file.\n\/\/\n"
                    seddef="$seddef\/\/\/\/ End - Generated by CARNet package $PKG\n"
                    seddef="$seddef    \\\$min_pass_length = 8;\n\2/"

                    set_min_pass_length "$seddef" "$cpconf_file"
                fi
            fi
        fi
    done
fi

if [ $min_pass_changed -eq 1 ]; then
    db_fset squirrelmail-change-pass-cn/min_pass_length seen false
    db_title squirrelmail-change-pass-cn - konfiguracija
    db_input critical squirrelmail-change-pass-cn/min_pass_length || true
    db_go || true
    cp_echo "CN: Minimum password length has been set to 8 characters."
fi

db_stop || true


# Enable change_pass plugin in SquirrelMail config.php.
#
if ! egrep -q '^\$plugins\[[0-9]+\][\ ]*=[\ ]*'\''change_pass'\' "$SQCONF"; then

    if cp_check_and_backup "$SQCONF"; then
        cp_echo "CN: Old $SQCONF saved as \"/var/backups/${SQCONF##*/}.bak\"."
    fi

    cp_echo "CN: Enabling SquirrelMail change_pass plugin in $SQCONF"
    /usr/sbin/squirrelmail-configure --install-plugin change_pass
fi


# Convert poppassd service from inetd.conf to xinetd.conf type.
# Service configuration is saved in /etc/xinetd.d/ directory.
#
if [ -x /etc/init.d/xinetd -a -d /etc/xinetd.d -a -x /usr/sbin/itox ]; then

  if egrep -q '^poppassd' /etc/inetd.conf && \
     [ ! -f /etc/xinetd.d/poppassd ]; then

	cp_echo "CN: Enabling poppassd in /etc/xinetd.d/poppassd"

	touch /etc/xinetd.d/poppassd.$$
	grep "^poppassd" /etc/inetd.conf  | \
		itox -daemon_dir /usr/sbin | cp-update "$PKG" /etc/xinetd.d/poppassd.$$
	cp_mv /etc/xinetd.d/poppassd.$$ /etc/xinetd.d/poppassd

	need_restart=1
  fi
fi


# Restart xinetd if needed.
#
if [ $need_restart -eq 1 ]; then

	if [ -x "/etc/init.d/xinetd" ]; then
	        if [ -x "`which invoke-rc.d 2>/dev/null`" ]; then
	                invoke-rc.d xinetd restart || exit $?
	        else
	                /etc/init.d/xinetd restart || exit $?
	        fi
	fi
fi


# Mail root
#
cp_mail "$PKG"

exit 0