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package gophermap
import (
"bufio"
"net/url"
"os"
"path"
"path/filepath"
"strings"
"tildegit.org/tjp/sliderule/gopher"
"tildegit.org/tjp/sliderule/internal/types"
)
// ListDir builds a gopher menu representing the contents of a directory.
func ListDir(dir string, location *url.URL) (gopher.MapDocument, error) {
return listDir(dir, location, nil, nil)
}
func listDir(dir string, location *url.URL, hidden map[string]struct{}, extensions map[string]types.Status) (gopher.MapDocument, error) {
contents, err := os.ReadDir(dir)
if err != nil {
return nil, err
}
doc := gopher.MapDocument{}
for _, entry := range contents {
name := entry.Name()
if _, ok := hidden[name]; ok || name == "gophermap" {
continue
}
var code types.Status
ext := strings.TrimPrefix(filepath.Ext(name), ".")
if entry.IsDir() {
code = gopher.MenuType
} else if c, ok := extensions[ext]; ok && ext != "" {
code = c
} else {
switch ext {
case "gophermap":
code = gopher.MenuType
case "exe", "bin", "out":
code = gopher.BinaryFileType
case "gif":
code = gopher.GifFileType
case "jpg", "jpeg", "tif", "tiff":
code = gopher.ImageFileType
case "bmp":
code = gopher.BitmapType
case "mp4", "mov", "avi", "wmv", "webm":
code = gopher.MovieFileType
case "pcm", "aiff", "mp3", "aac", "ogg", "wma", "flac", "alac":
code = gopher.SoundFileType
case "doc", "docx", "odt", "fodt":
code = gopher.DocumentType
case "html":
code = gopher.HTMLType
case "png":
code = gopher.PngImageFileType
case "rtf":
code = gopher.RtfDocumentType
case "wav":
code = gopher.WavSoundFileType
case "pdf":
code = gopher.PdfDocumentType
case "xml", "atom":
code = gopher.XmlDocumentType
default:
code = gopher.TextFileType
}
}
doc = append(doc, gopher.MapItem{
Type: code,
Display: displayName(dir, entry),
Selector: path.Join(path.Dir(location.Path), name),
Hostname: location.Hostname(),
Port: location.Port(),
})
}
return doc, nil
}
func displayName(dir string, entry os.DirEntry) string {
fname := entry.Name()
// if is a gophermap, use !title or filename
if strings.HasSuffix(fname, ".gophermap") {
if title := gophermapTitle(dir, fname); title != "" {
return title
}
return fname
}
if entry.IsDir() {
if tag := tagTitle(dir, fname); tag != "" {
return tag
}
if title := gophermapTitle(dir, filepath.Join(fname, "gophermap")); title != "" {
return title
}
}
return fname
}
func gophermapTitle(dir, name string) string {
file, err := os.Open(filepath.Join(dir, name))
if err != nil {
return ""
}
defer func() {
_ = file.Close()
}()
rdr := bufio.NewReader(file)
line, err := rdr.ReadString('\n')
if err != nil {
return ""
}
if !strings.HasPrefix(line, "!") {
return ""
}
return strings.TrimRight(line[1:], "\r\n")
}
func tagTitle(parent, name string) string {
file, err := os.Open(filepath.Join(parent, name, "gophertag"))
if err != nil {
return ""
}
defer func() {
_ = file.Close()
}()
stat, err := file.Stat()
if err != nil || stat.IsDir() {
return ""
}
rdr := bufio.NewReader(file)
line, err := rdr.ReadString('\n')
if err != nil {
return ""
}
return strings.TrimRight(line, "\r\n")
}
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