更改安卓端的文件访问方式，优化导入逻辑 (#64)

* Refactor import function & Allow import local comics without copying them to local path.

* android: use file_picker instead, support directory access for android 10

* Improve import logic

* Fix sql query.

* Add ability to remove invalid favorite items.

* Perform sort before choosing cover

* Revert changes of "use file_picker instead".

* Try catch on "check update"

* Added module 'flutter_saf'

* gitignore

* remove unsupported arch in build.gradle

* Use flutter_saf to handle android's directory and files, improve import logic.

* revert changes of 'requestLegacyExternalStorage'

* fix cbz import

* openDirectoryPlatform

* Remove double check on source folder

* use openFilePlatform

* remove unused import

* improve local comic's path handling

* bump version

* fix pubspec format

* return null when comic folder is empty

lib/pages/home_page.dart

@@ -1,4 +1,3 @@
-import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 import 'package:sliver_tools/sliver_tools.dart';
 import 'package:venera/components/components.dart';
@@ -497,6 +496,10 @@ class _ImportComicsWidgetState extends State<_ImportComicsWidget> {
 
   String? selectedFolder;
 
+  bool copyToLocalFolder = true;
+
+  bool cancelled = false;
+
   @override
   void dispose() {
     loading = false;
@@ -530,22 +533,23 @@ class _ImportComicsWidgetState extends State<_ImportComicsWidget> {
               ),
             )
           : Column(
-              key: key,
-              crossAxisAlignment: CrossAxisAlignment.start,
-              children: [
-                const SizedBox(width: 600),
-                ...List.generate(importMethods.length, (index) {
-                  return RadioListTile(
-                    title: Text(importMethods[index]),
-                    value: index,
-                    groupValue: type,
-                    onChanged: (value) {
-                      setState(() {
-                        type = value as int;
-                      });
-                    },
-                  );
-                }),
+            key: key,
+            crossAxisAlignment: CrossAxisAlignment.start,
+            children: [
+              const SizedBox(width: 600),
+              ...List.generate(importMethods.length, (index) {
+                return RadioListTile(
+                  title: Text(importMethods[index]),
+                  value: index,
+                  groupValue: type,
+                  onChanged: (value) {
+                    setState(() {
+                      type = value as int;
+                    });
+                  },
+                );
+              }),
+              if(type != 3)
                 ListTile(
                   title: Text("Add to favorites".tl),
                   trailing: Select(
@@ -559,10 +563,19 @@ class _ImportComicsWidgetState extends State<_ImportComicsWidget> {
                     },
                   ),
                 ).paddingHorizontal(8),
-                const SizedBox(height: 8),
-                Text(info).paddingHorizontal(24),
-              ],
-            ),
+              CheckboxListTile(
+                enabled: true,
+                title: Text("Copy to app local path".tl),
+                value: copyToLocalFolder,
+                onChanged:(v) {
+                  setState(() {
+                    copyToLocalFolder = !copyToLocalFolder;
+                  });
+                }).paddingHorizontal(8),
+              const SizedBox(height: 8),
+              Text(info).paddingHorizontal(24),
+            ],
+          ),
       actions: [
         Button.text(
           child: Row(
@@ -620,18 +633,20 @@ class _ImportComicsWidgetState extends State<_ImportComicsWidget> {
 
   void selectAndImport() async {
     height = key.currentContext!.size!.height;
+
     setState(() {
       loading = true;
     });
-    var importer = ImportComic(selectedFolder: selectedFolder);
-    var result = false;
-    if (type == 2) {
-      result = await importer.cbz();
-    } else if (type == 3) {
-      result = await importer.ehViewer();
-    } else {
-      result = await importer.directory(type == 0);
-    }
+    var importer = ImportComic(
+        selectedFolder: selectedFolder,
+        copyToLocal: copyToLocalFolder);
+    var result = switch(type) {
+      0 => await importer.directory(true),
+      1 => await importer.directory(false),
+      2 => await importer.cbz(),
+      3 => await importer.ehViewer(),
+      int() => true,
+    };
     if(result) {
       context.pop();
     } else {

lib/pages/reader/images.dart

@@ -604,7 +604,7 @@ ImageProvider _createImageProvider(int page, BuildContext context) {
   var reader = context.reader;
   var imageKey = reader.images![page - 1];
   if (imageKey.startsWith('file://')) {
-    return FileImage(File(imageKey.replaceFirst("file://", '')));
+    return FileImage(openFilePlatform(imageKey.replaceFirst("file://", '')));
   } else {
     return ReaderImageProvider(
       imageKey,

lib/pages/reader/scaffold.dart

@@ -469,7 +469,7 @@ class _ReaderScaffoldState extends State<_ReaderScaffold> {
               ImageProvider image;
               var imageKey = images[index];
               if (imageKey.startsWith('file://')) {
-                image = FileImage(File(imageKey.replaceFirst("file://", '')));
+                image = FileImage(openFilePlatform(imageKey.replaceFirst("file://", '')));
               } else {
                 image = ReaderImageProvider(
                   imageKey,
@@ -515,7 +515,7 @@ class _ReaderScaffoldState extends State<_ReaderScaffold> {
       }
     }
     if (imageKey.startsWith("file://")) {
-      return await File(imageKey.substring(7)).readAsBytes();
+      return await openFilePlatform(imageKey.substring(7)).readAsBytes();
     } else {
       return (await CacheManager().findCache(
               "$imageKey@${context.reader.type.sourceKey}@${context.reader.cid}@${context.reader.eid}"))!

lib/pages/settings/about.dart

@@ -86,29 +86,33 @@ Future<bool> checkUpdate() async {
 }
 
 Future<void> checkUpdateUi([bool showMessageIfNoUpdate = true]) async {
-  var value = await checkUpdate();
-  if (value) {
-    showDialog(
-        context: App.rootContext,
-        builder: (context) {
-          return ContentDialog(
-            title: "New version available".tl,
-            content: Text(
-                "A new version is available. Do you want to update now?".tl),
-            actions: [
-              Button.text(
-                onPressed: () {
-                  Navigator.pop(context);
-                  launchUrlString(
-                      "https://github.com/venera-app/venera/releases");
-                },
-                child: Text("Update".tl),
-              ),
-            ],
-          );
-        });
-  } else if (showMessageIfNoUpdate) {
-    App.rootContext.showMessage(message: "No new version available".tl);
+  try {
+    var value = await checkUpdate();
+    if (value) {
+      showDialog(
+          context: App.rootContext,
+          builder: (context) {
+            return ContentDialog(
+              title: "New version available".tl,
+              content: Text(
+                  "A new version is available. Do you want to update now?".tl),
+              actions: [
+                Button.text(
+                  onPressed: () {
+                    Navigator.pop(context);
+                    launchUrlString(
+                        "https://github.com/venera-app/venera/releases");
+                  },
+                  child: Text("Update".tl),
+                ),
+              ],
+            );
+          });
+    } else if (showMessageIfNoUpdate) {
+      App.rootContext.showMessage(message: "No new version available".tl);
+    }
+  } catch (e, s) {
+    Log.error("Check Update", e.toString(), s);
   }
 }
 

lib/pages/settings/local_favorites.dart

@@ -38,6 +38,16 @@ class _LocalFavoritesSettingsState extends State<LocalFavoritesSettings> {
             for (var e in LocalFavoritesManager().folderNames) e: e
           },
         ).toSliver(),
+        _CallbackSetting(
+          title: "Delete all unavailable local favorite items".tl,
+          callback: () async {
+            var controller = showLoadingDialog(context);
+            var count = await LocalFavoritesManager().removeInvalid();
+            controller.close();
+            context.showMessage(message: "Deleted @a favorite items".tlParams({'a': count}));
+          },
+          actionTitle: 'Delete'.tl,
+        ).toSliver(),
       ],
     );
   }