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file.go
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file.go
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// This file is part of the Smart Home
// Program complex distribution https://github.com/e154/smart-home
// Copyright (C) 2016-2021, Filippov Alex
//
// This library is free software: you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 3 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Library General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library. If not, see
// <https://www.gnu.org/licenses/>.
package common
import (
"io"
"log"
"os"
"os/exec"
"path/filepath"
"unicode/utf8"
)
const (
dataDir = "data"
fileStoragePath = "file_storage"
staticPath = "static"
depth = 3
)
// GetFileSize ...
func GetFileSize(name string) (int64, error) {
file, err := os.Open(name)
if err != nil {
return 0, err
}
defer file.Close()
fi, err := file.Stat()
if err != nil {
return 0, err
}
return fi.Size(), nil
}
// GetFullPath ...
func GetFullPath(name string) string {
dir := filepath.Join(dataDir, fileStoragePath)
for i := 0; i < depth; i++ {
dir = filepath.Join(dir, name[i*3:(i+1)*3])
}
return dir
}
// GetLinkPath ...
func GetLinkPath(name string) string {
dir := "/upload"
count := utf8.RuneCountInString(name)
if count < 9 {
return filepath.Join(dir, name)
}
for i := 0; i < depth; i++ {
dir = filepath.Join(dir, name[i*3:(i+1)*3])
}
return filepath.Join(dir, name)
}
// StoragePath ...
func StoragePath() string {
return filepath.Join(dataDir, fileStoragePath)
}
// StaticPath ...
func StaticPath() string {
return filepath.Join(dataDir, staticPath)
}
// FileExist ...
func FileExist(path string) (exist bool) {
if _, err := os.Stat(path); err != nil {
if os.IsNotExist(err) {
// file does not exist
} else {
// other error
}
return
}
exist = true
return
}
// CopyFile ...
func CopyFile(f, t string) {
from, err := os.Open(f)
if err != nil {
log.Fatal(err)
}
defer from.Close()
to, err := os.OpenFile(t, os.O_RDWR|os.O_CREATE, 0666)
if err != nil {
log.Fatal(err)
}
defer to.Close()
_, err = io.Copy(to, from)
if err != nil {
log.Fatal(err)
}
}
// FormatSourceCode ...
func FormatSourceCode(filename string) {
cmd := exec.Command("gofmt", "-w", filename)
if err := cmd.Run(); err != nil {
log.Fatalf("Error while running gofmt: %s", err.Error())
}
}