feat: load CBR files

internal/cbz/cbz_loader.go

@@ -4,65 +4,86 @@ import (
 	"archive/zip"
 	"bufio"
 	"bytes"
+	"context"
 	"fmt"
+	"io"
+	"io/fs"
+	"path/filepath"
+	"strings"
+
 	"github.com/araddon/dateparse"
 	"github.com/belphemur/CBZOptimizer/v2/internal/manga"
 	"github.com/belphemur/CBZOptimizer/v2/internal/utils/errs"
-	"io"
-	"path/filepath"
-	"strings"
+	"github.com/mholt/archives"
 )
 
 func LoadChapter(filePath string) (*manga.Chapter, error) {
-	// Open the .cbz file
-	r, err := zip.OpenReader(filePath)
-	if err != nil {
-		return nil, fmt.Errorf("failed to open .cbz file: %w", err)
-	}
-	defer errs.Capture(&err, r.Close, "failed to close opened .cbz file")
+	ctx := context.Background()
 
 	chapter := &manga.Chapter{
 		FilePath: filePath,
 	}
-	// Check for comment
-	if r.Comment != "" {
-		scanner := bufio.NewScanner(strings.NewReader(r.Comment))
-		if scanner.Scan() {
-			convertedTime := scanner.Text()
-			chapter.ConvertedTime, err = dateparse.ParseAny(convertedTime)
-			if err == nil {
-				chapter.IsConverted = true
+
+	// First, try to read the comment using zip.OpenReader for CBZ files
+	if strings.ToLower(filepath.Ext(filePath)) == ".cbz" {
+		r, err := zip.OpenReader(filePath)
+		if err == nil {
+			defer errs.Capture(&err, r.Close, "failed to close zip reader for comment")
+
+			// Check for comment
+			if r.Comment != "" {
+				scanner := bufio.NewScanner(strings.NewReader(r.Comment))
+				if scanner.Scan() {
+					convertedTime := scanner.Text()
+					chapter.ConvertedTime, err = dateparse.ParseAny(convertedTime)
+					if err == nil {
+						chapter.IsConverted = true
+					}
+				}
 			}
 		}
+		// Continue even if comment reading fails
 	}
 
-	for _, f := range r.File {
-		if f.FileInfo().IsDir() {
-			continue
-		}
-		err := func() error {
-			// Open the file inside the zip
-			rc, err := f.Open()
-			if err != nil {
-				return fmt.Errorf("failed to open file inside .cbz: %w", err)
-			}
+	// Open the archive using archives library for file operations
+	fsys, err := archives.FileSystem(ctx, filePath, nil)
+	if err != nil {
+		return nil, fmt.Errorf("failed to open archive file: %w", err)
+	}
 
-			defer errs.Capture(&err, rc.Close, "failed to close file inside .cbz")
+	// Walk through all files in the filesystem
+	err = fs.WalkDir(fsys, ".", func(path string, d fs.DirEntry, err error) error {
+		if err != nil {
+			return err
+		}
+
+		if d.IsDir() {
+			return nil
+		}
+
+		return func() error {
+			// Open the file
+			file, err := fsys.Open(path)
+			if err != nil {
+				return fmt.Errorf("failed to open file %s: %w", path, err)
+			}
+			defer errs.Capture(&err, file.Close, fmt.Sprintf("failed to close file %s", path))
 
 			// Determine the file extension
-			ext := strings.ToLower(filepath.Ext(f.Name))
+			ext := strings.ToLower(filepath.Ext(path))
+			fileName := strings.ToLower(filepath.Base(path))
 
-			if ext == ".xml" && strings.ToLower(filepath.Base(f.Name)) == "comicinfo.xml" {
+			if ext == ".xml" && fileName == "comicinfo.xml" {
 				// Read the ComicInfo.xml file content
-				xmlContent, err := io.ReadAll(rc)
+				xmlContent, err := io.ReadAll(file)
 				if err != nil {
 					return fmt.Errorf("failed to read ComicInfo.xml content: %w", err)
 				}
 				chapter.ComicInfoXml = string(xmlContent)
-			} else if !chapter.IsConverted && ext == ".txt" && strings.ToLower(filepath.Base(f.Name)) == "converted.txt" {
-				textContent, err := io.ReadAll(rc)
+			} else if !chapter.IsConverted && ext == ".txt" && fileName == "converted.txt" {
+				textContent, err := io.ReadAll(file)
 				if err != nil {
-					return fmt.Errorf("failed to read Converted.xml content: %w", err)
+					return fmt.Errorf("failed to read converted.txt content: %w", err)
 				}
 				scanner := bufio.NewScanner(bytes.NewReader(textContent))
 				if scanner.Scan() {
@@ -76,7 +97,7 @@ func LoadChapter(filePath string) (*manga.Chapter, error) {
 			} else {
 				// Read the file contents for page
 				buf := new(bytes.Buffer)
-				_, err = io.Copy(buf, rc)
+				_, err = io.Copy(buf, file)
 				if err != nil {
 					return fmt.Errorf("failed to read file contents: %w", err)
 				}
@@ -95,9 +116,10 @@ func LoadChapter(filePath string) (*manga.Chapter, error) {
 			}
 			return nil
 		}()
-		if err != nil {
-			return nil, err
-		}
+	})
+
+	if err != nil {
+		return nil, err
 	}
 
 	return chapter, nil