1 files changed, 49 insertions, 0 deletions
diff --git a/internal/processor/audio.go b/internal/processor/audio.go
new file mode 100644
index 0000000..98aedcf
--- /dev/null
+++ b/internal/processor/audio.go
@@ -0,0 +1,49 @@
+package processor
+
+import (
+	"fmt"
+	"io"
+	"os"
+	"path/filepath"
+)
+
+// processAudio copies an .mp3 file into destDir and returns an HTML <audio> snippet.
+// The audio element has controls enabled so visitors can play it inline.
+func processAudio(srcPath, destDir, postID string) (filename, htmlContent string, err error) {
+	outName := filepath.Base(srcPath)
+	outPath := filepath.Join(destDir, outName)
+
+	if err := copyFile(srcPath, outPath); err != nil {
+		return "", "", err
+	}
+
+	// The src attribute is relative to the site root.
+	src := fmt.Sprintf("posts/%s/%s", postID, outName)
+	html := fmt.Sprintf(
+		`<audio controls class="post-audio"><source src="%s" type="audio/mpeg">Your browser does not support audio.</audio>`,
+		src,
+	)
+
+	return outName, html, nil
+}
+
+// copyFile copies the file at src to dst, creating dst if it does not exist.
+func copyFile(src, dst string) error {
+	in, err := os.Open(src)
+	if err != nil {
+		return fmt.Errorf("open source %s: %w", src, err)
+	}
+	defer in.Close()
+
+	out, err := os.Create(dst)
+	if err != nil {
+		return fmt.Errorf("create dest %s: %w", dst, err)
+	}
+	defer out.Close()
+
+	if _, err := io.Copy(out, in); err != nil {
+		return fmt.Errorf("copy %s → %s: %w", src, dst, err)
+	}
+
+	return nil
+}