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package files
import (
"io/fs"
"path/filepath"
"strings"
"go.alanpearce.eu/x/log"
"gitlab.com/tozd/go/errors"
)
type Reader struct {
root string
log *log.Logger
files map[string]*File
}
func NewReader(path string, log *log.Logger) (*Reader, error) {
r := &Reader{
root: path,
log: log,
files: make(map[string]*File),
}
if err := r.registerContentFiles(); err != nil {
return nil, errors.WithMessagef(err, "registering content files")
}
return r, nil
}
func (r *Reader) registerFile(urlpath string, filepath string) error {
file, err := r.OpenFile(urlpath, filepath)
if err != nil {
return errors.WithMessagef(err, "could not register file %s", filepath)
}
r.files[urlpath] = file
return nil
}
func (r *Reader) registerContentFiles() error {
err := filepath.WalkDir(r.root, func(filePath string, f fs.DirEntry, err error) error {
if err != nil {
return errors.WithMessagef(err, "failed to access path %s", filePath)
}
if f.IsDir() {
return nil
}
relPath, err := filepath.Rel(r.root, filePath)
if err != nil {
return errors.WithMessagef(err, "failed to make path relative, path: %s", filePath)
}
urlPath := fileNameToPathName("/" + relPath)
switch filepath.Ext(relPath) {
case ".br", ".gz":
return nil
}
return r.registerFile(urlPath, filePath)
})
if err != nil {
return errors.WithMessage(err, "could not walk directory")
}
return nil
}
func (r *Reader) GetFile(urlPath string) *File {
return r.files[urlPath]
}
func (r *Reader) CanonicalisePath(path string) (cPath string, differs bool) {
cPath = path
if strings.HasSuffix(path, "/index.html") {
cPath, differs = strings.CutSuffix(path, "index.html")
} else if !strings.HasSuffix(path, "/") && r.files[path+"/"] != nil {
cPath, differs = path+"/", true
}
return cPath, differs
}
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