perf: use comment of the zip to know if it's converted instead of txt file

cbz/cbz_creator.go

@@ -18,7 +18,6 @@ func WriteChapterToCBZ(chapter *manga.Chapter, outputFilePath string) error {
 
 	// Create a new ZIP writer
 	zipWriter := zip.NewWriter(zipFile)
-	err = zipWriter.SetComment("Created by CBZOptimizer")
 	if err != nil {
 		return err
 	}
@@ -71,18 +70,11 @@ func WriteChapterToCBZ(chapter *manga.Chapter, outputFilePath string) error {
 	}
 
 	if chapter.IsConverted {
-		convertedWriter, err := zipWriter.CreateHeader(&zip.FileHeader{
-			Name:     "Converted.txt",
-			Method:   zip.Deflate,
-			Modified: time.Now(),
-		})
-		if err != nil {
-			return fmt.Errorf("failed to create Converted.txt in .cbz: %w", err)
-		}
 
-		_, err = convertedWriter.Write([]byte(fmt.Sprintf("%s\nThis chapter has been converted by CBZOptimizer.", chapter.ConvertedTime)))
+		convertedString := fmt.Sprintf("%s\nThis chapter has been converted by CBZOptimizer.", chapter.ConvertedTime)
+		err = zipWriter.SetComment(convertedString)
 		if err != nil {
-			return fmt.Errorf("failed to write Converted.txt contents: %w", err)
+			return fmt.Errorf("failed to write comment: %w", err)
 		}
 	}
 

cbz/cbz_creator_test.go

@@ -3,6 +3,7 @@ package cbz
 import (
 	"archive/zip"
 	"bytes"
+	"fmt"
 	"github.com/belphemur/CBZOptimizer/manga"
 	"os"
 	"testing"
@@ -10,11 +11,14 @@ import (
 )
 
 func TestWriteChapterToCBZ(t *testing.T) {
+	currentTime := time.Now()
+
 	// Define test cases
 	testCases := []struct {
 		name            string
 		chapter         *manga.Chapter
 		expectedFiles   []string
+		expectedComment string
 	}{
 		//test case where there is only one page and ComicInfo and the chapter is converted
 		{
@@ -29,9 +33,10 @@ func TestWriteChapterToCBZ(t *testing.T) {
 				},
 				ComicInfoXml:  "<Series>Boundless Necromancer</Series>",
 				IsConverted:   true,
-				ConvertedTime: time.Now(),
+				ConvertedTime: currentTime,
 			},
-			expectedFiles: []string{"0000.jpg", "ComicInfo.xml", "Converted.txt"},
+			expectedFiles:   []string{"0000.jpg", "ComicInfo.xml"},
+			expectedComment: fmt.Sprintf("%s\nThis chapter has been converted by CBZOptimizer.", currentTime),
 		},
 		//test case where there is only one page and no
 		{
@@ -125,6 +130,10 @@ func TestWriteChapterToCBZ(t *testing.T) {
 				}
 			}
 
+			if tc.expectedComment != "" && r.Comment != tc.expectedComment {
+				t.Errorf("Expected comment %s, but found %s", tc.expectedComment, r.Comment)
+			}
+
 			// Check if there are no unexpected files
 			if len(filesInArchive) != len(tc.expectedFiles) {
 				t.Errorf("Expected %d files, but found %d", len(tc.expectedFiles), len(filesInArchive))

cbz/cbz_loader.go

@@ -23,6 +23,17 @@ func LoadChapter(filePath string) (*manga.Chapter, error) {
 	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
+			}
+		}
+	}
 
 	for _, f := range r.File {
 		if f.FileInfo().IsDir() {
@@ -45,7 +56,7 @@ func LoadChapter(filePath string) (*manga.Chapter, error) {
 				return nil, fmt.Errorf("failed to read ComicInfo.xml content: %w", err)
 			}
 			chapter.ComicInfoXml = string(xmlContent)
-		} else if ext == ".txt" && strings.ToLower(filepath.Base(f.Name)) == "converted.txt" {
+		} else if !chapter.IsConverted && ext == ".txt" && strings.ToLower(filepath.Base(f.Name)) == "converted.txt" {
 			textContent, err := io.ReadAll(rc)
 			if err != nil {
 				rc.Close()