// NNM-Club torrent filess mass downloader
// Created for Uploaders group
// Copyright (c) 2012-2020 Vladimir "fat0troll" Hodakov

package fetcherv1

import (
	"fmt"
	"io"
	"os"
)

// Source: https://gist.github.com/var23rav/23ae5d0d4d830aff886c3c970b8f6c6b

/*
   GoLang: os.Rename() give error "invalid cross-device link" for Docker container with Volumes.
   moveFile(source, destination) will work moving file between folders
*/

func moveFile(sourcePath, destPath string) error {
	inputFile, err := os.Open(sourcePath)
	if err != nil {
		return fmt.Errorf("couldn't open source file: %s", err)
	}

	outputFile, err := os.Create(destPath)
	if err != nil {
		inputFile.Close()
		return fmt.Errorf("couldn't open destination file: %s", err)
	}
	defer outputFile.Close()

	_, err = io.Copy(outputFile, inputFile)
	inputFile.Close()

	if err != nil {
		return fmt.Errorf("writing to output file failed: %s", err)
	}

	// The copy was successful, so now delete the original file
	err = os.Remove(sourcePath)
	if err != nil {
		return fmt.Errorf("failed removing original file: %s", err)
	}

	return nil
}