Squash merge audio-player-component into main

backend/library/coverart_handler.go

@@ -0,0 +1,42 @@
+package library
+
+import (
+	"fmt"
+	"net/http"
+	"path/filepath"
+
+	"yellowjacket/backend/system"
+)
+
+// CoverArtHandler serves cover art images via HTTP.
+type CoverArtHandler struct {
+	coversDir string
+}
+
+// NewCoverArtHandler creates a handler that serves cover art from the user data directory.
+func NewCoverArtHandler() (*CoverArtHandler, error) {
+	dataDir, err := system.GetUserDataDirPath()
+	if err != nil {
+		return nil, fmt.Errorf("could not get user data directory: %w", err)
+	}
+
+	return &CoverArtHandler{
+		coversDir: filepath.Join(dataDir, "covers"),
+	}, nil
+}
+
+// ServeHTTP handles requests for cover art images.
+func (h *CoverArtHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
+	// Extract filename from path like "/covers/abc123.jpg"
+	filename := filepath.Base(r.URL.Path)
+
+	// Prevent directory traversal
+	if filename == "." || filename == ".." {
+		http.NotFound(w, r)
+
+		return
+	}
+
+	filePath := filepath.Join(h.coversDir, filename)
+	http.ServeFile(w, r, filePath)
+}