plc4go/internal/plc4go/eip/Configuration.go

//
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.
//

package eip

import (
	"github.com/pkg/errors"
	"github.com/rs/zerolog/log"
	"strconv"
)

type Configuration struct {
	backplane int8
	slot      int8
}

func ParseFromOptions(options map[string][]string) (Configuration, error) {
	configuration := Configuration{
		backplane: 0,
		slot:      0,
	}
	if localRackString := getFromOptions(options, "backplane"); localRackString != "" {
		atoi, err := strconv.Atoi(localRackString)
		if err != nil {
			return Configuration{}, errors.Wrap(err, "Error parsing backplane")
		}
		configuration.backplane = int8(atoi)
	}
	if localSlotString := getFromOptions(options, "slot"); localSlotString != "" {
		atoi, err := strconv.Atoi(localSlotString)
		if err != nil {
			return Configuration{}, errors.Wrap(err, "Error parsing slot")
		}
		configuration.slot = int8(atoi)
	}
	return configuration, nil
}

func getFromOptions(options map[string][]string, key string) string {
	if optionValues, ok := options[key]; ok {
		if len(optionValues) <= 0 {
			return ""
		}
		if len(optionValues) > 1 {
			log.Warn().Msgf("Options %s must be unique", key)
		}
		return optionValues[0]
	}
	return ""
}