fix media organize and subscription workflows

internal/service/strm_tree_paths.go

@@ -0,0 +1,76 @@
+package service
+
+import (
+	"errors"
+	"fmt"
+	"path"
+	"path/filepath"
+	"strings"
+)
+
+func strmTreeRelativeSource(source, sourceRoot string) string {
+	source = normalizeSTRMTreeSource(source)
+	root := normalizeRemotePath(sourceRoot)
+	if root != "/" && strings.HasPrefix(source, root+"/") {
+		return strings.TrimPrefix(strings.TrimPrefix(source, root), "/")
+	}
+	return strings.TrimPrefix(source, "/")
+}
+
+func strmTreeCloudRef(source, sourceRoot string) string {
+	source = normalizeSTRMTreeSource(source)
+	if strings.HasPrefix(source, "/") {
+		return source
+	}
+	if strings.TrimSpace(sourceRoot) != "" {
+		return joinRemotePath(sourceRoot, source)
+	}
+	return normalizeRemotePath(source)
+}
+
+func strmTreeOutputRelativePath(source string) (string, error) {
+	parts := strings.Split(strings.Trim(strings.ReplaceAll(source, "\\", "/"), "/"), "/")
+	if len(parts) == 0 {
+		return "", errors.New("empty source path")
+	}
+	out := make([]string, 0, len(parts))
+	for i, part := range parts {
+		part = strings.TrimSpace(part)
+		if part == "" || part == "." || part == ".." {
+			return "", fmt.Errorf("unsafe path segment %q", part)
+		}
+		if i == len(parts)-1 {
+			ext := strings.ToLower(path.Ext(part))
+			if _, ok := videoExtensions[ext]; !ok {
+				return "", fmt.Errorf("unsupported media extension %q", ext)
+			}
+			part = strings.TrimSuffix(part, path.Ext(part)) + ".strm"
+		}
+		safe := sanitizeFilename(part)
+		if safe == "" {
+			return "", errors.New("empty sanitized path segment")
+		}
+		out = append(out, safe)
+	}
+	return filepath.Join(out...), nil
+}
+
+func strmTreeOutputPrefixPath(prefix string) (string, error) {
+	parts := strings.Split(strings.Trim(strings.ReplaceAll(prefix, "\\", "/"), "/"), "/")
+	out := make([]string, 0, len(parts))
+	for _, part := range parts {
+		part = strings.TrimSpace(part)
+		if part == "" {
+			continue
+		}
+		if part == "." || part == ".." {
+			return "", fmt.Errorf("unsafe output prefix segment %q", part)
+		}
+		safe := sanitizeFilename(part)
+		if safe == "" {
+			return "", errors.New("empty sanitized output prefix segment")
+		}
+		out = append(out, safe)
+	}
+	return filepath.Join(out...), nil
+}