1 files changed, 47 insertions, 0 deletions
diff --git a/gopher/response.go b/gopher/response.go
index 042feba..1ad7f1d 100644
--- a/gopher/response.go
+++ b/gopher/response.go
@@ -4,6 +4,9 @@ import (
 	"bytes"
 	"fmt"
 	"io"
+	"mime"
+	"path"
+	"strings"
 	"sync"
 
 	"tildegit.org/tjp/sliderule/internal/types"
@@ -160,3 +163,47 @@ func (rdr *responseReader) ensureReader() {
 		rdr.reader = io.MultiReader(rdr.Body)
 	})
 }
+
+// GuessItemType attempts to find the best gopher item type for a file based on its name.
+func GuessItemType(filepath string) types.Status {
+	ext := path.Ext(filepath)
+	switch ext {
+	case ".gophermap":
+		return MenuType
+	case ".txt", ".gmi", ".md":
+		return TextFileType
+	case ".gif":
+		return  GifFileType
+	case ".png":
+		return PngImageFileType
+	case ".jpg", ".jpeg", ".tif", ".tiff":
+		return ImageFileType
+	case ".mp4", ".mov":
+		return MovieFileType
+	case ".pcm", ".mp3", ".aiff", ".aif", ".aac", ".ogg", ".flac", ".alac", ".wma":
+		return SoundFileType
+	case ".bmp":
+		return BitmapType
+	case ".doc", ".docx", ".odt", ".fodt":
+		return DocumentType
+	case ".html", ".htm":
+		return HTMLType
+	case ".rtf":
+		return RtfDocumentType
+	case ".wav":
+		return WavSoundFileType
+	case ".pdf":
+		return PdfDocumentType
+	case ".xml", ".atom":
+		return XmlDocumentType
+	case ".exe", ".bin", ".out", ".dylib", ".dll", ".so", ".a", ".o":
+		return BinaryFileType
+	}
+
+	mtype := mime.TypeByExtension(ext)
+	if strings.HasPrefix(mtype, "text/") {
+		return TextFileType
+	}
+
+	return BinaryFileType
+}