/*
** Copyright 2022 Dolysis Consulting Limited
**
** Licensed 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.
**
** For changes see the git log
 */
package ipp

import (
	"fmt"
	"os"
	"path"
)

// ParseControlFile reads and decodes a cups control file into a response
func ParseControlFile(jobID int, spoolDirectory string) (*Response, error) {
	if spoolDirectory == "" {
		spoolDirectory = "/var/spool/cups"
	}

	controlFilePath := path.Join(spoolDirectory, fmt.Sprintf("c%d", jobID))

	if _, err := os.Stat(controlFilePath); err != nil {
		return nil, err
	}

	controlFile, err := os.Open(controlFilePath)
	if err != nil {
		return nil, err
	}
	defer controlFile.Close()

	return NewResponseDecoder(controlFile).Decode(nil)
}