stefanoj3 / dirstalk

package result

import (

	"bufio"

	"encoding/json"

	"os"

	"github.com/pkg/errors"

	"github.com/stefanoj3/dirstalk/pkg/scan"

)

func LoadResultsFromFile(resultFilePath string) ([]scan.Result, error) {

	file, err := os.Open(resultFilePath) // #nosec

	if err != nil {

		return nil, errors.Wrapf(err, "failed to open %s", resultFilePath)

	}

	defer file.Close() //nolint

	fileInfo, err := file.Stat()

	if err != nil {

		return nil, errors.Wrapf(err, "failed to read properties of %s", resultFilePath)

	}

	if fileInfo.IsDir() {

		return nil, errors.Errorf("`%s` is a directory, you need to specify a valid result file", resultFilePath)

	}

	fileScanner := bufio.NewScanner(file)

	lineCounter := 0

	results := make([]scan.Result, 0, 10)

	for fileScanner.Scan() {

		lineCounter++

		r := scan.Result{}

		if err := json.Unmarshal(fileScanner.Bytes(), &r); err != nil {

			return nil, errors.Wrapf(err, "unable to read line %d", lineCounter)

		}

		results = append(results, r)

	}

	if err := fileScanner.Err(); err != nil {

		return nil, errors.Wrap(err, "an error occurred while reading the result file")

	}

	return results, nil

}