package gc

import (
	"os"
	"time"
)

type sorter []os.FileInfo

func (f sorter) Len() int {
	return len(f)
}

func (f sorter) Less(i, j int) bool {
	// Snagged this from chanbakjsd/filehost
	const bytesPerSecond = 1024
	fi := int(time.Since(f[i].ModTime()).Seconds()) + int(f[i].Size()/bytesPerSecond)
	fj := int(time.Since(f[j].ModTime()).Seconds()) + int(f[j].Size()/bytesPerSecond)
	return fi > fj
}

func (f sorter) Swap(i, j int) {
	f[i], f[j] = f[j], f[i]
}