Allow batch export. Close #179

assets/translation.json

@@ -321,7 +321,9 @@
     "Manage": "管理",
     "Verify": "验证",
     "Cloudflare verification required": "需要Cloudflare验证",
-    "Success": "成功"
+    "Success": "成功",
+    "Compressing": "压缩中",
+    "Exporting": "导出中"
   },
   "zh_TW": {
     "Home": "首頁",
@@ -645,6 +647,8 @@
     "Manage": "管理",
     "Verify": "驗證",
     "Cloudflare verification required": "需要Cloudflare驗證",
-    "Success": "成功"
+    "Success": "成功",
+    "Compressing": "壓縮中",
+    "Exporting": "匯出中"
   }
 }

lib/components/message.dart

@@ -168,7 +168,15 @@ Future<void> showConfirmDialog({
 }
 
 class LoadingDialogController {
-  void Function()? closeDialog;
+  double? _progress;
+
+  String? _message;
+
+  void Function()? _closeDialog;
+
+  void Function(double? value)? _serProgress;
+
+  void Function(String message)? _setMessage;
 
   bool closed = false;
 
@@ -177,63 +185,86 @@ class LoadingDialogController {
       return;
     }
     closed = true;
-    if (closeDialog == null) {
+    if (_closeDialog == null) {
-      Future.microtask(closeDialog!);
+      Future.microtask(_closeDialog!);
     } else {
-      closeDialog!();
+      _closeDialog!();
     }
   }
+
+  void setProgress(double? value) {
+    if (closed) {
+      return;
+    }
+    _serProgress?.call(value);
+  }
+
+  void setMessage(String message) {
+    if (closed) {
+      return;
+    }
+    _setMessage?.call(message);
+  }
 }
 
-LoadingDialogController showLoadingDialog(BuildContext context,
+LoadingDialogController showLoadingDialog(
-    {void Function()? onCancel,
+  BuildContext context, {
+  void Function()? onCancel,
   bool barrierDismissible = true,
   bool allowCancel = true,
   String? message,
-    String cancelButtonText = "Cancel"}) {
+  String cancelButtonText = "Cancel",
+  bool withProgress = false,
+}) {
   var controller = LoadingDialogController();
+  controller._message = message;
+
+  if (withProgress) {
+    controller._progress = 0;
+  }
 
   var loadingDialogRoute = DialogRoute(
     context: context,
     barrierDismissible: barrierDismissible,
     builder: (BuildContext context) {
-        return Dialog(
+      return StatefulBuilder(builder: (context, setState) {
-          child: Container(
+        controller._serProgress = (value) {
-            width: 100,
+          setState(() {
-            padding: const EdgeInsets.all(16.0),
+            controller._progress = value;
-            child: Row(
+          });
-              children: [
+        };
-                const SizedBox(
+        controller._setMessage = (message) {
-                  width: 30,
+          setState(() {
-                  height: 30,
+            controller._message = message;
-                  child: CircularProgressIndicator(),
+          });
-                ),
+        };
-                const SizedBox(
+        return ContentDialog(
-                  width: 16,
+          title: controller._message ?? 'Loading',
-                ),
+          content: LinearProgressIndicator(
-                Text(
+            value: controller._progress,
-                  message ?? 'Loading',
+            backgroundColor: context.colorScheme.surfaceContainer,
-                  style: const TextStyle(fontSize: 16),
+          ).paddingHorizontal(16).paddingVertical(16),
-                ),
+          actions: [
-                const Spacer(),
+            FilledButton(
-                if (allowCancel)
+              onPressed: allowCancel
-                  TextButton(
+                  ? () {
-                      onPressed: () {
                       controller.close();
                       onCancel?.call();
-                      },
+                    }
-                      child: Text(cancelButtonText.tl))
+                  : null,
+              child: Text(cancelButtonText.tl),
+            )
           ],
-            ),
-          ),
         );
       });
+    },
+  );
 
   var navigator = Navigator.of(context, rootNavigator: true);
 
   navigator.push(loadingDialogRoute).then((value) => controller.closed = true);
 
-  controller.closeDialog = () {
+  controller._closeDialog = () {
     navigator.removeRoute(loadingDialogRoute);
   };
 
@@ -444,9 +475,7 @@ Future<int?> showSelectDialog({
                 child: Text('Cancel'.tl),
               ),
               FilledButton(
-                onPressed: current == null
+                onPressed: current == null ? null : context.pop,
-                    ? null
-                    : context.pop,
                 child: Text('Confirm'.tl),
               ),
             ],

lib/pages/local_comics_page.dart

@@ -12,6 +12,7 @@ import 'package:venera/utils/epub.dart';
 import 'package:venera/utils/io.dart';
 import 'package:venera/utils/pdf.dart';
 import 'package:venera/utils/translations.dart';
+import 'package:zip_flutter/zip_flutter.dart';
 
 class LocalComicsPage extends StatefulWidget {
   const LocalComicsPage({super.key});
@@ -152,8 +153,8 @@ class _LocalComicsPageState extends State<LocalComicsPage> {
                 ));
           },
         ),
-      if (selectedComics.length == 1)
+      if (selectedComics.isNotEmpty)
-        ...exportActions(selectedComics.keys.first),
+        ...exportActions(selectedComics.keys.toList()),
     ]);
   }
 
@@ -322,7 +323,7 @@ class _LocalComicsPageState extends State<LocalComicsPage> {
                     });
                   },
                 ),
-                ...exportActions(c as LocalComic),
+                ...exportActions([c as LocalComic]),
               ];
             },
           ),
@@ -390,79 +391,102 @@ class _LocalComicsPageState extends State<LocalComicsPage> {
     return isDeleted;
   }
 
-  List<MenuEntry> exportActions(LocalComic c) {
+  List<MenuEntry> exportActions(List<LocalComic> comics) {
     return [
       MenuEntry(
         icon: Icons.outbox_outlined,
         text: "Export as cbz".tl,
-          onClick: () async {
+        onClick: () {
-            var controller = showLoadingDialog(
+          exportComics(comics, CBZ.export, ".cbz");
-              context,
+        },
-              allowCancel: false,
+      ),
-            );
-            try {
-              var file = await CBZ.export(c);
-              await saveFile(filename: file.name, file: file);
-              await file.delete();
-            } catch (e, s) {
-              context.showMessage(message: e.toString());
-              Log.error("CBZ Export", e, s);
-            }
-            controller.close();
-          }),
       MenuEntry(
         icon: Icons.picture_as_pdf_outlined,
         text: "Export as pdf".tl,
         onClick: () async {
-          var cache = FilePath.join(App.cachePath, 'temp.pdf');
+          exportComics(comics, createPdfFromComicIsolate, ".pdf");
-          var controller = showLoadingDialog(
-            context,
-            allowCancel: false,
-          );
-          try {
-            await createPdfFromComicIsolate(
-              comic: c,
-              savePath: cache,
-            );
-            await saveFile(
-              file: File(cache),
-              filename: "${c.title}.pdf",
-            );
-          } catch (e, s) {
-            Log.error("PDF Export", e, s);
-            context.showMessage(message: e.toString());
-          } finally {
-            controller.close();
-            File(cache).deleteIgnoreError();
-          }
         },
       ),
       MenuEntry(
         icon: Icons.import_contacts_outlined,
         text: "Export as epub".tl,
         onClick: () async {
-          var controller = showLoadingDialog(
+          exportComics(comics, createEpubWithLocalComic, ".epub");
-            context,
-            allowCancel: false,
-          );
-          File? file;
-          try {
-            file = await createEpubWithLocalComic(
-              c,
-            );
-            await saveFile(
-              file: file,
-              filename: "${c.title}.epub",
-            );
-          } catch (e, s) {
-            Log.error("EPUB Export", e, s);
-            context.showMessage(message: e.toString());
-          } finally {
-            controller.close();
-            file?.deleteIgnoreError();
-          }
         },
       )
     ];
   }
+
+  /// Export given comics to a file
+  void exportComics(
+      List<LocalComic> comics, ExportComicFunc export, String ext) async {
+    var current = 0;
+    var cacheDir = FilePath.join(App.cachePath, 'comics_export');
+    var outFile = FilePath.join(App.cachePath, 'comics_export.zip');
+    bool canceled = false;
+    if (Directory(cacheDir).existsSync()) {
+      Directory(cacheDir).deleteSync(recursive: true);
+    }
+    Directory(cacheDir).createSync();
+    var loadingController = showLoadingDialog(
+      context,
+      allowCancel: true,
+      message: "${"Exporting".tl} $current/${comics.length}",
+      withProgress: comics.length > 1,
+      onCancel: () {
+        canceled = true;
+      },
+    );
+    try {
+      var fileName = "";
+      // For each comic, export it to a file
+      for (var comic in comics) {
+        fileName = FilePath.join(cacheDir, sanitizeFileName(comic.title) + ext);
+        await export(comic, fileName);
+        current++;
+        if (comics.length > 1) {
+          loadingController
+              .setMessage("${"Exporting".tl} $current/${comics.length}");
+          loadingController.setProgress(current / comics.length);
+        }
+        if (canceled) {
+          return;
+        }
+      }
+      // For single comic, just save the file
+      if (comics.length == 1) {
+        await saveFile(
+          file: File(fileName),
+          filename: File(fileName).name,
+        );
+        Directory(cacheDir).deleteSync(recursive: true);
+        loadingController.close();
+        return;
+      }
+      // For multiple comics, compress the folder
+      loadingController.setProgress(null);
+      loadingController.setMessage("Compressing".tl);
+      await ZipFile.compressFolderAsync(cacheDir, outFile);
+      if (canceled) {
+        File(outFile).deleteIgnoreError();
+        return;
+      }
+    } catch (e, s) {
+      Log.error("Export Comics", e, s);
+      context.showMessage(message: e.toString());
+      loadingController.close();
+      return;
+    } finally {
+      Directory(cacheDir).deleteIgnoreError(recursive: true);
+    }
+    await saveFile(
+      file: File(outFile),
+      filename: "comics_export.zip",
+    );
+    loadingController.close();
+    File(outFile).deleteIgnoreError();
+  }
 }
+
+typedef ExportComicFunc = Future<File> Function(
+    LocalComic comic, String outFilePath);

lib/utils/cbz.dart

@@ -175,7 +175,7 @@ abstract class CBZ {
     return comic;
   }
 
-  static Future<File> export(LocalComic comic) async {
+  static Future<File> export(LocalComic comic, String outFilePath) async {
     var cache = Directory(FilePath.join(App.cachePath, 'cbz_export'));
     if (cache.existsSync()) cache.deleteSync(recursive: true);
     cache.createSync();
@@ -234,7 +234,7 @@ abstract class CBZ {
         ).toJson(),
       ),
     );
-    var cbz = File(FilePath.join(App.cachePath, sanitizeFileName('${comic.title}.cbz')));
+    var cbz = File(outFilePath);
     if (cbz.existsSync()) cbz.deleteSync();
     await _compress(cache.path, cbz.path);
     cache.deleteSync(recursive: true);

lib/utils/epub.dart

@@ -24,7 +24,8 @@ class EpubData {
   });
 }
 
-Future<File> createEpubComic(EpubData data, String cacheDir) async {
+Future<File> createEpubComic(
+    EpubData data, String cacheDir, String outFilePath) async {
   final workingDir = Directory(FilePath.join(cacheDir, 'epub'));
   if (workingDir.existsSync()) {
     workingDir.deleteSync(recursive: true);
@@ -109,8 +110,7 @@ ${images.map((e) => '        <img src="$e" alt="$e"/>').join('\n')}
   }
 
   // content.opf
-  final contentOpf =
+  final contentOpf = File(FilePath.join(workingDir.path, 'content.opf'));
-      File(FilePath.join(workingDir.path, 'content.opf'));
   final uuid = const Uuid().v4();
   var spineStrBuilder = StringBuffer();
   for (var i = 0; i < chapterIndex; i++) {
@@ -171,16 +171,15 @@ ${navMapStrBuilder.toString()}
 </ncx>
   ''');
 
-  // zip
+  ZipFile.compressFolder(workingDir.path, outFilePath);
-  final zipPath = FilePath.join(cacheDir, '${data.title}.epub');
-  ZipFile.compressFolder(workingDir.path, zipPath);
 
   workingDir.deleteSync(recursive: true);
 
-  return File(zipPath);
+  return File(outFilePath);
 }
 
-Future<File> createEpubWithLocalComic(LocalComic comic) async {
+Future<File> createEpubWithLocalComic(
+    LocalComic comic, String outFilePath) async {
   var chapters = <String, List<File>>{};
   if (comic.chapters == null) {
     chapters[comic.title] =
@@ -188,9 +187,9 @@ Future<File> createEpubWithLocalComic(LocalComic comic) async {
             .map((e) => File(e))
             .toList();
   } else {
-    for (var chapter in comic.chapters!.keys) {
+    for (var chapter in comic.downloadedChapters) {
-      chapters[comic.chapters![chapter]!] = (await LocalManager()
+      chapters[comic.chapters![chapter]!] =
-              .getImages(comic.id, comic.comicType, chapter))
+          (await LocalManager().getImages(comic.id, comic.comicType, chapter))
               .map((e) => File(e))
               .toList();
     }
@@ -205,6 +204,6 @@ Future<File> createEpubWithLocalComic(LocalComic comic) async {
   final cacheDir = App.cachePath;
 
   return Isolate.run(() => overrideIO(() async {
-        return createEpubComic(data, cacheDir);
+        return createEpubComic(data, cacheDir, outFilePath);
       }));
 }

lib/utils/pdf.dart

@@ -49,7 +49,7 @@ Future<void> _createPdfFromComic({
       images.add(file.path);
     }
   } else {
-    for (var chapter in comic.chapters!.keys) {
+    for (var chapter in comic.downloadedChapters) {
       var files = Directory(FilePath.join(baseDir, chapter)).listSync();
       reorderFiles(files);
       for (var file in files) {
@@ -112,10 +112,7 @@ Future<Isolate> _runIsolate(
   );
 }
 
-Future<void> createPdfFromComicIsolate({
+Future<File> createPdfFromComicIsolate(LocalComic comic, String savePath) async {
-  required LocalComic comic,
-  required String savePath,
-}) async {
   var receivePort = ReceivePort();
   SendPort? sendPort;
   Isolate? isolate;
@@ -134,7 +131,8 @@ Future<void> createPdfFromComicIsolate({
     }
   });
   isolate = await _runIsolate(comic, savePath, receivePort.sendPort);
-  return completer.future;
+  await completer.future;
+  return File(savePath);
 }
 
 class PdfGenerator {