s3tables: extract utility and filer operations to separate modules

- Move ARN parsing, path helpers, and metadata structures to utils.go
- Extract all extended attribute and filer operations to filer_ops.go
- Reduces code duplication and improves modularity
- Improves code organization and maintainability

weed/s3api/s3tables/filer_ops.go

@@ -0,0 +1,138 @@
+package s3tables
+
+import (
+	"context"
+	"fmt"
+	"time"
+
+	"github.com/seaweedfs/seaweedfs/weed/pb/filer_pb"
+)
+
+// Filer operations - Common functions for interacting with the filer
+
+// createDirectory creates a new directory at the specified path
+func (h *S3TablesHandler) createDirectory(client filer_pb.SeaweedFilerClient, path string) error {
+	dir, name := splitPath(path)
+	_, err := client.CreateEntry(context.Background(), &filer_pb.CreateEntryRequest{
+		Directory: dir,
+		Entry: &filer_pb.Entry{
+			Name:        name,
+			IsDirectory: true,
+			Attributes: &filer_pb.FuseAttributes{
+				Mtime:    time.Now().Unix(),
+				Crtime:   time.Now().Unix(),
+				FileMode: uint32(0755 | 1<<31), // Directory mode
+			},
+		},
+	})
+	return err
+}
+
+// setExtendedAttribute sets an extended attribute on an existing entry
+func (h *S3TablesHandler) setExtendedAttribute(client filer_pb.SeaweedFilerClient, path, key string, data []byte) error {
+	dir, name := splitPath(path)
+
+	// First, get the existing entry
+	resp, err := client.LookupDirectoryEntry(context.Background(), &filer_pb.LookupDirectoryEntryRequest{
+		Directory: dir,
+		Name:      name,
+	})
+	if err != nil {
+		return err
+	}
+
+	entry := resp.Entry
+	if entry == nil {
+		return fmt.Errorf("entry not found: %s", path)
+	}
+
+	// Update the extended attributes
+	if entry.Extended == nil {
+		entry.Extended = make(map[string][]byte)
+	}
+	entry.Extended[key] = data
+
+	// Save the updated entry
+	_, err = client.UpdateEntry(context.Background(), &filer_pb.UpdateEntryRequest{
+		Directory: dir,
+		Entry:     entry,
+	})
+	return err
+}
+
+// getExtendedAttribute gets an extended attribute from an entry
+func (h *S3TablesHandler) getExtendedAttribute(client filer_pb.SeaweedFilerClient, path, key string) ([]byte, error) {
+	dir, name := splitPath(path)
+	resp, err := client.LookupDirectoryEntry(context.Background(), &filer_pb.LookupDirectoryEntryRequest{
+		Directory: dir,
+		Name:      name,
+	})
+	if err != nil {
+		return nil, err
+	}
+
+	if resp.Entry == nil {
+		return nil, fmt.Errorf("entry not found: %s", path)
+	}
+
+	data, ok := resp.Entry.Extended[key]
+	if !ok {
+		return nil, fmt.Errorf("attribute not found: %s", key)
+	}
+
+	return data, nil
+}
+
+// deleteExtendedAttribute deletes an extended attribute from an entry
+func (h *S3TablesHandler) deleteExtendedAttribute(client filer_pb.SeaweedFilerClient, path, key string) error {
+	dir, name := splitPath(path)
+
+	// Get the existing entry
+	resp, err := client.LookupDirectoryEntry(context.Background(), &filer_pb.LookupDirectoryEntryRequest{
+		Directory: dir,
+		Name:      name,
+	})
+	if err != nil {
+		return err
+	}
+
+	entry := resp.Entry
+	if entry == nil {
+		return fmt.Errorf("entry not found: %s", path)
+	}
+
+	// Remove the extended attribute
+	if entry.Extended != nil {
+		delete(entry.Extended, key)
+	}
+
+	// Save the updated entry
+	_, err = client.UpdateEntry(context.Background(), &filer_pb.UpdateEntryRequest{
+		Directory: dir,
+		Entry:     entry,
+	})
+	return err
+}
+
+// deleteDirectory deletes a directory and all its contents
+func (h *S3TablesHandler) deleteDirectory(client filer_pb.SeaweedFilerClient, path string) error {
+	dir, name := splitPath(path)
+	_, err := client.DeleteEntry(context.Background(), &filer_pb.DeleteEntryRequest{
+		Directory:            dir,
+		Name:                 name,
+		IsDeleteData:         true,
+		IsRecursive:          true,
+		IgnoreRecursiveError: true,
+	})
+	return err
+}
+
+// entryExists checks if an entry exists at the given path
+func (h *S3TablesHandler) entryExists(client filer_pb.SeaweedFilerClient, path string) bool {
+	dir, name := splitPath(path)
+	resp, err := client.LookupDirectoryEntry(context.Background(), &filer_pb.LookupDirectoryEntryRequest{
+		Directory: dir,
+		Name:      name,
+	})
+	return err == nil && resp.Entry != nil
+}