package tree

import (
	"os"
	"path/filepath"
)

type RealWalker struct {
	path   string
	report chan int64
}

func (r *RealWalker) walkFunc(path string, info os.FileInfo, err error) error {
	if !info.IsDir() {
		switch mode := info.Mode(); {
		case mode.IsRegular():
			r.report <- info.Size()
		}
	}

	return nil
}

func (r *RealWalker) Walk() {
	filepath.Walk(r.path, r.walkFunc)
	close(r.report)
}

func NewRealWalker(path string, report chan int64) *RealWalker {
	r := &RealWalker{path: path, report: report}
	return r
}