AGENT_CONF=$CONFDIR/agent.conf
DRWEB32_INI=$CONFDIR/drweb32.ini
ICAPD_INI=$CONFDIR/drweb-icapd.ini

DEFAULT_LICENSE_FILE=$PREFIX/drweb32.key

KEY_SCRIPT_NAME=`basename $0`

# $1 - config file
# $2 - section name
# $3 - key name
DeleteAbsentLicenseFiles() {
    if [ ! -f "$1" ]; then
        echo "*** WARNING: $1 : No such file!"
        echo
        return 1
    fi

    # Retrieve all license file names from config.
    files=`IniKeyValues $1 $2 $3`

    config=$1
    config_new=`MakeTmpFile`
    cp -p -f $config $config_new

    # Iterate over them, check if they present,
    # don't include them into config copy if they aren't.
    for i in $files ; do
        if [ ! -f "$i" ]; then
            IniSectProc $config_new $2 "next if m|^\\s*$3\\s*=\\s*$i\\s*\$|;"
        fi
    done

    if diff $config $config_new >/dev/null; then
        true
    else
        echo
        echo "Some keys specified in $config are not found!"
        echo "These keys will be removed from the configuration file."
        AskUpdateConfig $config $config_new dont_ask
    fi
}

AddLicenseFile() {
    # Add what
    license_file=$1
    # Add where
    config_file=$2
    section_name=$3
    key_name=$4

    if [ ! -f "$config_file" ]; then
        return 1
    fi

    config_file_new=`MakeTmpFile`
    cp -p -f $config_file $config_file_new

    # Retrieve all license file names from config.
    files=`IniKeyValues $config_file_new $section_name $key_name`

    # Iterate over them and diff them with the new license file.
    added_already=
    for i in $files ; do
        [ -f "$i" ] || continue
        diff "$i" "$license_file" 1>/dev/null && added_already=1 && break
    done

    # If not added yet, copy license file (if needed) and add it to the config.
    license_file_copy=
    if [ -z "$added_already" ]; then
        # Look if this key is in confdir already...
        keys_in_confdir=`ls $CONFDIR/drweb32-*.key 2>/dev/null`
        for i in $keys_in_confdir ; do
            if diff "$i" "$license_file" 1>/dev/null ; then
                license_file_copy=$i
                break
            fi
        done
        # ...Copy it if not.
        if [ -z "$license_file_copy" ]; then
            license_file_copy="$CONFDIR/drweb32-`env LANG=C date +%Y%m%d%H%M%S`.key"
            cp -p -f $license_file $license_file_copy
        fi

        if [ -n "$files" ]; then
            # There's some key in the section, add the new one before it.
            IniSectProc $config_file_new $section_name "if (/^\\s*$key_name\\s*=\\s*(.*)/) { print \"$key_name = $license_file_copy\n\"; last }"
        else
            # There are no keys in the section, add the first one.
            IniSectProc $config_file_new $section_name "if (!\$added) { \$_=\"# Added by Dr.Web's $KEY_SCRIPT_NAME\n$key_name = $license_file_copy\n\n\".\$_; \$added=1 }"
        fi

        echo
        echo "Adding $license_file_copy into [$section_name] of $config_file ."
        AskUpdateConfig $config_file $config_file_new dont_ask
    else
        echo
        echo "Already added to [$section_name] of $config_file ."
    fi
}

SetKey() {
    IsKeyValid && return

    # Ask user for path to the key.
    #
    while true ; do
        printf "Enter path to the Dr.Web license key file or '0' to skip: "
        read file
        echo
        [ -z "$file" ] && continue
        [ "$file" = "0" ] && break
        if [ -f "$file" ] ; then
            # Check the key.
            if IsKeyValid "$file" ; then
                true
            else
                echo "Wrong key!"
                echo
                continue
            fi

            # Check for clean install (default license file is absent on disk).
            if [ -f "$DEFAULT_LICENSE_FILE" ]; then
                # Try to add license file to all configs.
                AddLicenseFile "$file" $AGENT_CONF StandaloneMode LicenseFile
                AddLicenseFile "$file" $DRWEB32_INI Daemon Key
                AddLicenseFile "$file" $DRWEB32_INI Scanner Key
                if [ "$PRODUCT_NAME_SHORT" = "drweb-internet-gateways" ]; then
                    # Try to add license file to $ICAPD_INI also.
                    AddLicenseFile "$file" $ICAPD_INI Icapd Key
                fi

                # Delete entries of all keys which are absent on disk.
                DeleteAbsentLicenseFiles $AGENT_CONF StandaloneMode LicenseFile
                DeleteAbsentLicenseFiles $DRWEB32_INI Daemon Key
                DeleteAbsentLicenseFiles $DRWEB32_INI Scanner Key
                if [ "$PRODUCT_NAME_SHORT" = "drweb-internet-gateways" ]; then
                    # Delete dead keys from $ICAPD_INI also.
                    DeleteAbsentLicenseFiles $ICAPD_INI Icapd Key
                fi
            else
                # Add this license file under default name.
                cp -p -f "$file" $DEFAULT_LICENSE_FILE
                chmod 600 $DEFAULT_LICENSE_FILE
                chown drweb:drweb $DEFAULT_LICENSE_FILE
            fi

            break
        else
	    echo "`eval_gettext \"Specified path to key file is invalid. Try again, please.\"`"
        fi
    done
}

IsKeyValid() {
   retval=0
   if [ -n "$1" ] ; then
       license_file=$1
   else
       license_file="$DEFAULT_LICENSE_FILE"
   fi

   if [ -f "$license_file" ] ; then
       if [ -x "$PREFIX/read_signed" ] ; then
           if $PREFIX/read_signed key "$license_file" ; then
               retval=0
           else
               retval=1
           fi
       fi
   else
       retval=1
   fi
   return $retval
}