fix(metadata): remove forced download attribution

go_backend/download_comment_test.go

@@ -2,33 +2,31 @@ package gobackend
 
 import "testing"
 
-func TestBuildDownloadedFileCommentKeepsSourceLinkAndAddsCredit(t *testing.T) {
+func TestBuildDownloadedFileCommentKeepsSourceComment(t *testing.T) {
 	const source = "https://music.apple.com/us/album/example/123"
 	got := buildDownloadedFileComment(source, "https://music.amazon.com/albums/example")
-	want := source + "\n" + downloadCommentCredit
-	if got != want {
-		t.Fatalf("comment = %q, want %q", got, want)
+	if got != source {
+		t.Fatalf("comment = %q, want %q", got, source)
 	}
 }
 
 func TestBuildDownloadedFileCommentUsesProviderCommentWhenSourceIsEmpty(t *testing.T) {
 	const provider = "https://music.amazon.com/albums/example"
 	got := buildDownloadedFileComment("", provider)
-	want := provider + "\n" + downloadCommentCredit
-	if got != want {
-		t.Fatalf("comment = %q, want %q", got, want)
+	if got != provider {
+		t.Fatalf("comment = %q, want %q", got, provider)
 	}
 }
 
-func TestBuildDownloadedFileCommentAddsCreditWithoutLink(t *testing.T) {
-	if got := buildDownloadedFileComment("", ""); got != downloadCommentCredit {
-		t.Fatalf("comment = %q, want credit only", got)
+func TestBuildDownloadedFileCommentStaysEmptyWithoutProviderComment(t *testing.T) {
+	if got := buildDownloadedFileComment("", ""); got != "" {
+		t.Fatalf("comment = %q, want empty", got)
 	}
 }
 
-func TestBuildDownloadedFileCommentDoesNotDuplicateCredit(t *testing.T) {
-	original := "https://example.test/album/1\n" + downloadCommentCredit
-	if got := buildDownloadedFileComment(original, ""); got != original {
-		t.Fatalf("credit was duplicated: %q", got)
+func TestBuildDownloadedFileCommentTrimsWhitespace(t *testing.T) {
+	const original = "https://example.test/album/1"
+	if got := buildDownloadedFileComment("  "+original+"\r\n", ""); got != original {
+		t.Fatalf("comment = %q, want %q", got, original)
 	}
 }

go_backend/exports_download.go

@@ -133,22 +133,12 @@ type DownloadResult struct {
 	RequiresContainerConversion bool
 }
 
-const downloadCommentCredit = "Downloaded with SpotiFLAC Mobile. Enjoy your music!"
-
 func buildDownloadedFileComment(sourceComment, providerComment string) string {
 	comment := strings.TrimSpace(sourceComment)
-	if comment == "" {
-		comment = strings.TrimSpace(providerComment)
+	if comment != "" {
+		return comment
 	}
-	for _, line := range strings.Split(strings.ReplaceAll(comment, "\r\n", "\n"), "\n") {
-		if strings.EqualFold(strings.TrimSpace(line), downloadCommentCredit) {
-			return comment
-		}
-	}
-	if comment == "" {
-		return downloadCommentCredit
-	}
-	return comment + "\n" + downloadCommentCredit
+	return strings.TrimSpace(providerComment)
 }
 
 func buildDownloadSuccessResponse(

go_backend/extension_fallback_metadata_test.go

@@ -34,9 +34,8 @@ func TestOverlayExtensionReleaseMetadataFillsMissingRequestFields(t *testing.T)
 		"song.m4a",
 		false,
 	)
-	expectedComment := track.Comment + "\n" + downloadCommentCredit
 	if response.UPC != track.UPC || response.AlbumType != "single" ||
-		!response.Explicit || response.Comment != expectedComment {
+		!response.Explicit || response.Comment != track.Comment {
 		t.Fatalf("enriched metadata was lost in download response: %#v", response)
 	}
 }