From 3c299f237d96a4fd3154fb4893525622c6bb673a Mon Sep 17 00:00:00 2001
From: Přemysl Eric Janouch <p@janouch.name>
Date: Fri, 8 Dec 2023 10:34:22 +0100
Subject: Cleanup, fixes

---
 main.go | 50 ++++++++++++++++++++++++++++++++------------------
 1 file changed, 32 insertions(+), 18 deletions(-)

diff --git a/main.go b/main.go
index bf63704..fc19dd6 100644
--- a/main.go
+++ b/main.go
@@ -122,37 +122,44 @@ func cmdRun(args []string) {
 	log.Fatalln(s.ListenAndServe())
 }
 
-func importFunc(path string, d fs.DirEntry, err error) error {
-	if err != nil || d.IsDir() {
-		return err
-	}
-
-	// The input may be a relative path, and we want to remember it as such,
-	// but symlinks for the images must be absolute.
-	absPath, err := filepath.Abs(path)
-	if err != nil {
-		return err
-	}
-
+func isImage(path string) (bool, error) {
 	cmd := exec.Command("xdg-mime", "query", "filetype", path)
 	stdout, err := cmd.StdoutPipe()
 	if err != nil {
-		return err
+		return false, err
 	}
 	if err := cmd.Start(); err != nil {
-		return err
+		return false, err
 	}
 	out, err := io.ReadAll(stdout)
 	if err != nil {
-		return err
+		return false, err
 	}
 	if err := cmd.Wait(); err != nil {
+		return false, err
+	}
+	return bytes.HasPrefix(out, []byte("image/")), nil
+}
+
+func importFunc(path string, d fs.DirEntry, err error) error {
+	if err != nil || d.IsDir() {
+		return err
+	}
+
+	// The input may be a relative path, and we want to remember it as such,
+	// but symlinks for the images must be absolute.
+	absPath, err := filepath.Abs(path)
+	if err != nil {
 		return err
 	}
 
 	// Skip videos, which ImageMagick can process, but we don't want it to,
 	// so that they're not converted 1:1 to WebP.
-	if !bytes.HasPrefix(out, []byte("image/")) {
+	pathIsImage, err := isImage(path)
+	if err != nil {
+		return err
+	}
+	if !pathIsImage {
 		return nil
 	}
 
@@ -174,8 +181,11 @@ func importFunc(path string, d fs.DirEntry, err error) error {
 	}
 
 	hexSHA1 := hex.EncodeToString(hash.Sum(make([]byte, sha1.Size)))
-	// TODO: Make sure that the subdirectory exists.
 	pathImage := imagePath(hexSHA1)
+	imageDirname, _ := filepath.Split(pathImage)
+	if err := os.MkdirAll(imageDirname, 755); err != nil {
+		return err
+	}
 	if err := os.Symlink(absPath, pathImage); err != nil &&
 		!errors.Is(err, fs.ErrExist) {
 		return err
@@ -233,7 +243,11 @@ func cmdCheck(args []string) {
 }
 
 func makeThumbnail(pathImage, pathThumb string) (int, int, error) {
-	// TODO: Make sure that the trailing subdirectory in pathThumb exists.
+	thumbDirname, _ := filepath.Split(pathThumb)
+	if err := os.MkdirAll(thumbDirname, 755); err != nil {
+		return 0, 0, err
+	}
+
 	cmd := exec.Command("convert", pathImage, "-coalesce", "-colorspace", "RGB",
 		"-auto-orient", "-strip", "-resize", "256x128>", "-colorspace", "sRGB",
 		"-format", "%w %h", "+write", "info:", pathThumb)
-- 
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