(Feat): Added a new archive type: RAR

internal/archiver/archiver.go

@@ -14,6 +14,8 @@ func Compress(config *models.CompressConfig) error {
 		return createTar(config)
 	case models.GZIP:
 		return createGzip(config)
+	case models.RAR:
+		return createRar(config)
 	default:
 		return nil
 	}
@@ -29,6 +31,8 @@ func Extract(config *models.ExtractConfig) error {
 		return extractTar(config)
 	case models.GZIP:
 		return extractGzip(config)
+	case models.RAR:
+		return extractRar(config)
 	default:
 		return nil
 	}

internal/archiver/detect.go

@@ -26,6 +26,8 @@ func DetectArchiveType(path string) (models.ArchiveType, error) {
 		return models.TAR, nil
 	case ".tgz":
 		return models.TARGZ, nil
+	case ".rar":
+		return models.RAR, nil
 	}
 
 	// Try by magic bytes
@@ -70,6 +72,11 @@ func DetectArchiveType(path string) (models.ArchiveType, error) {
 		return models.TAR, nil
 	}
 
+	// RAR magic: Rar! (0x52 0x61 0x72 0x21)
+	if len(header) >= 4 && header[0] == 0x52 && header[1] == 0x61 && header[2] == 0x72 && header[3] == 0x21 {
+		return models.RAR, nil
+	}
+
 	return models.AUTO, nil
 }
 
@@ -86,6 +93,8 @@ func Analyze(path string) (*models.ArchiveInfo, error) {
 		return analyzeTar(path, true)
 	case models.TAR:
 		return analyzeTar(path, false)
+	case models.RAR:
+		return analyzeRar(path)
 	case models.GZIP:
 		// For GZIP, provide basic file info
 		file, err := os.Open(path)

internal/archiver/rar.go

@@ -0,0 +1,136 @@
+package archiver
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+
+	"zipprine/internal/models"
+
+	"github.com/nwaples/rardecode"
+)
+
+// extractRar extracts a RAR archive
+func extractRar(config *models.ExtractConfig) error {
+	file, err := os.Open(config.ArchivePath)
+	if err != nil {
+		return fmt.Errorf("failed to open RAR file: %w", err)
+	}
+	defer file.Close()
+
+	reader, err := rardecode.NewReader(file, "")
+	if err != nil {
+		return fmt.Errorf("failed to create RAR reader: %w", err)
+	}
+
+	if err := os.MkdirAll(config.DestPath, 0755); err != nil {
+		return fmt.Errorf("failed to create destination directory: %w", err)
+	}
+
+	for {
+		header, err := reader.Next()
+		if err != nil {
+			if err.Error() == "EOF" {
+				break
+			}
+			return fmt.Errorf("failed to read RAR entry: %w", err)
+		}
+
+		if header.IsDir {
+			targetPath := filepath.Join(config.DestPath, header.Name)
+			if err := os.MkdirAll(targetPath, 0755); err != nil {
+				return fmt.Errorf("failed to create directory: %w", err)
+			}
+			continue
+		}
+
+		targetPath := filepath.Join(config.DestPath, header.Name)
+
+		if _, err := os.Stat(targetPath); err == nil && !config.OverwriteAll {
+			fmt.Printf("Skipping existing file: %s\n", header.Name)
+			continue
+		}
+
+		if err := os.MkdirAll(filepath.Dir(targetPath), 0755); err != nil {
+			return fmt.Errorf("failed to create parent directory: %w", err)
+		}
+
+		outFile, err := os.Create(targetPath)
+		if err != nil {
+			return fmt.Errorf("failed to create file %s: %w", header.Name, err)
+		}
+
+		if _, err := outFile.ReadFrom(reader); err != nil {
+			outFile.Close()
+			return fmt.Errorf("failed to write file %s: %w", header.Name, err)
+		}
+		outFile.Close()
+
+		// Set permissions if requested
+		if config.PreservePerms {
+			if err := os.Chmod(targetPath, header.Mode()); err != nil {
+				fmt.Printf("Warning: failed to set permissions for %s: %v\n", header.Name, err)
+			}
+		}
+
+		fmt.Printf("Extracted: %s\n", header.Name)
+	}
+
+	return nil
+}
+
+// analyzeRar analyzes a RAR archive and returns information about it
+func analyzeRar(path string) (*models.ArchiveInfo, error) {
+	file, err := os.Open(path)
+	if err != nil {
+		return nil, fmt.Errorf("failed to open RAR file: %w", err)
+	}
+	defer file.Close()
+
+	fileStat, _ := file.Stat()
+
+	reader, err := rardecode.NewReader(file, "")
+	if err != nil {
+		return nil, fmt.Errorf("failed to create RAR reader: %w", err)
+	}
+
+	info := &models.ArchiveInfo{
+		Type:           models.RAR,
+		CompressedSize: fileStat.Size(),
+		Files:          []models.FileInfo{},
+	}
+
+	for {
+		header, err := reader.Next()
+		if err != nil {
+			if err.Error() == "EOF" {
+				break
+			}
+			return nil, fmt.Errorf("failed to read RAR entry: %w", err)
+		}
+
+		if !header.IsDir {
+			info.FileCount++
+			info.TotalSize += header.UnPackedSize
+			info.Files = append(info.Files, models.FileInfo{
+				Name:    header.Name,
+				Size:    header.UnPackedSize,
+				IsDir:   header.IsDir,
+				ModTime: header.ModificationTime.Format("2006-01-02 15:04:05"),
+			})
+		}
+	}
+
+	if info.TotalSize > 0 {
+		info.CompressionRatio = float64(info.CompressedSize) / float64(info.TotalSize)
+	}
+
+	return info, nil
+}
+
+// Note: RAR compression is proprietary and requires a license.
+// This implementation only supports extraction using the rardecode library.
+// For compression, users should use WinRAR or other licensed tools.
+func createRar(config *models.CompressConfig) error {
+	return fmt.Errorf("RAR compression is not supported due to proprietary format. Please use ZIP, TAR, or TAR.GZ for compression")
+}