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// Copyright 2024 The Hugo Authors. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package hugofs
import (
"os"
"github.com/gohugoio/hugo/common/hugio"
"github.com/spf13/afero"
)
var (
_ afero.Fs = (*hasBytesFs)(nil)
_ FilesystemUnwrapper = (*hasBytesFs)(nil)
)
type hasBytesFs struct {
afero.Fs
shouldCheck func(name string) bool
hasBytesCallback func(name string, match []byte)
patterns [][]byte
}
func NewHasBytesReceiver(delegate afero.Fs, shouldCheck func(name string) bool, hasBytesCallback func(name string, match []byte), patterns ...[]byte) afero.Fs {
return &hasBytesFs{Fs: delegate, shouldCheck: shouldCheck, hasBytesCallback: hasBytesCallback, patterns: patterns}
}
func (fs *hasBytesFs) UnwrapFilesystem() afero.Fs {
return fs.Fs
}
func (fs *hasBytesFs) Create(name string) (afero.File, error) {
f, err := fs.Fs.Create(name)
if err == nil {
f = fs.wrapFile(f)
}
return f, err
}
func (fs *hasBytesFs) OpenFile(name string, flag int, perm os.FileMode) (afero.File, error) {
f, err := fs.Fs.OpenFile(name, flag, perm)
if err == nil && isWrite(flag) {
f = fs.wrapFile(f)
}
return f, err
}
func (fs *hasBytesFs) wrapFile(f afero.File) afero.File {
if !fs.shouldCheck(f.Name()) {
return f
}
patterns := make([]*hugio.HasBytesPattern, len(fs.patterns))
for i, p := range fs.patterns {
patterns[i] = &hugio.HasBytesPattern{Pattern: p}
}
return &hasBytesFile{
File: f,
hbw: &hugio.HasBytesWriter{
Patterns: patterns,
},
hasBytesCallback: fs.hasBytesCallback,
}
}
func (fs *hasBytesFs) Name() string {
return "hasBytesFs"
}
type hasBytesFile struct {
hasBytesCallback func(name string, match []byte)
hbw *hugio.HasBytesWriter
afero.File
}
func (h *hasBytesFile) Write(p []byte) (n int, err error) {
n, err = h.File.Write(p)
if err != nil {
return
}
return h.hbw.Write(p)
}
func (h *hasBytesFile) Close() error {
for _, p := range h.hbw.Patterns {
if p.Match {
h.hasBytesCallback(h.Name(), p.Pattern)
}
}
return h.File.Close()
}
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