// Code generated by fileb0x at "2019-10-12 15:08:17.962049 +0500 +05 m=+0.015795926" from config file "fileb0x.yml" DO NOT EDIT.
// modification hash(424c75e610a092ecf4e8efbf68adeec8.238872c2653234e79053054d1ba776af)

package static


import (
  "bytes"
  
  "context"
  "io"
  "net/http"
  "os"
  "path"


  "golang.org/x/net/webdav"


)

var ( 
  // CTX is a context for webdav vfs
  CTX = context.Background()

  
  // FS is a virtual memory file system
  FS = webdav.NewMemFS()
  

  // Handler is used to server files through a http handler
  Handler *webdav.Handler

  // HTTP is the http file system
  HTTP http.FileSystem = new(HTTPFS)
)

// HTTPFS implements http.FileSystem
type HTTPFS struct {
	// Prefix allows to limit the path of all requests. F.e. a prefix "css" would allow only calls to /css/*
	Prefix string
}



func init() {
  err := CTX.Err()
  if err != nil {
		panic(err)
	}






  
  err = FS.Mkdir(CTX, "static/", 0777)
  if err != nil && err != os.ErrExist {
    panic(err)
  }
  

  
  err = FS.Mkdir(CTX, "static/css/", 0777)
  if err != nil && err != os.ErrExist {
    panic(err)
  }
  

  
  err = FS.Mkdir(CTX, "static/js/", 0777)
  if err != nil && err != os.ErrExist {
    panic(err)
  }
  





  Handler = &webdav.Handler{
    FileSystem: FS,
    LockSystem: webdav.NewMemLS(),
  }


}



// Open a file
func (hfs *HTTPFS) Open(path string) (http.File, error) {
  path = hfs.Prefix + path


  f, err := FS.OpenFile(CTX, path, os.O_RDONLY, 0644)
  if err != nil {
    return nil, err
  }

  return f, nil
}

// ReadFile is adapTed from ioutil
func ReadFile(path string) ([]byte, error) {
  f, err := FS.OpenFile(CTX, path, os.O_RDONLY, 0644)
  if err != nil {
    return nil, err
  }

  buf := bytes.NewBuffer(make([]byte, 0, bytes.MinRead))

  // If the buffer overflows, we will get bytes.ErrTooLarge.
  // Return that as an error. Any other panic remains.
  defer func() {
    e := recover()
    if e == nil {
      return
    }
    if panicErr, ok := e.(error); ok && panicErr == bytes.ErrTooLarge {
      err = panicErr
    } else {
      panic(e)
    }
  }()
  _, err = buf.ReadFrom(f)
  return buf.Bytes(), err
}

// WriteFile is adapTed from ioutil
func WriteFile(filename string, data []byte, perm os.FileMode) error {
  f, err := FS.OpenFile(CTX, filename, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, perm)
  if err != nil {
    return err
  }
  n, err := f.Write(data)
  if err == nil && n < len(data) {
    err = io.ErrShortWrite
  }
  if err1 := f.Close(); err == nil {
    err = err1
  }
  return err
}

// WalkDirs looks for files in the given dir and returns a list of files in it
// usage for all files in the b0x: WalkDirs("", false)
func WalkDirs(name string, includeDirsInList bool, files ...string) ([]string, error) {
	f, err := FS.OpenFile(CTX, name, os.O_RDONLY, 0)
	if err != nil {
		return nil, err
	}

	fileInfos, err := f.Readdir(0)
	if err != nil {
    return nil, err
  }
  
  err = f.Close()
  if err != nil {
		return nil, err
	}

	for _, info := range fileInfos {
		filename := path.Join(name, info.Name())

		if includeDirsInList || !info.IsDir() {
			files = append(files, filename)
		}

		if info.IsDir() {
			files, err = WalkDirs(filename, includeDirsInList, files...)
			if err != nil {
				return nil, err
			}
		}
	}

	return files, nil
}