Feat/saf (#81)

* [Android] Use SAF to change local path

* Use IOOverrides to replace openDirectoryPlatform and openFilePlatform

* fix io

lib/foundation/image_provider/base_image_provider.dart

@@ -1,5 +1,4 @@
 import 'dart:async' show Future, StreamController, scheduleMicrotask;
-import 'dart:collection';
 import 'dart:convert';
 import 'dart:ui' as ui show Codec;
 import 'dart:ui';
@@ -108,7 +107,7 @@ abstract class BaseImageProvider<T extends BaseImageProvider<T>>
     }
   }
 
-  static final _cache = LinkedHashMap<String, Uint8List>();
+  static final _cache = <String, Uint8List>{};
 
   static var _cacheSize = 0;
 

lib/foundation/image_provider/cached_image.dart

@@ -1,5 +1,4 @@
 import 'dart:async' show Future, StreamController;
-import 'dart:io';
 import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 import 'package:venera/network/images.dart';
@@ -25,7 +24,7 @@ class CachedImageProvider
   @override
   Future<Uint8List> load(StreamController<ImageChunkEvent> chunkEvents) async {
     if(url.startsWith("file://")) {
-      var file = openFilePlatform(url.substring(7));
+      var file = File(url.substring(7));
       return file.readAsBytes();
     }
     await for (var progress in ImageDownloader.loadThumbnail(url, sourceKey, cid)) {

lib/foundation/local.dart

@@ -71,7 +71,7 @@ class LocalComic with HistoryMixin implements Comic {
         downloadedChapters = List.from(jsonDecode(row[8] as String)),
         createdAt = DateTime.fromMillisecondsSinceEpoch(row[9] as int);
 
-  File get coverFile => openFilePlatform(FilePath.join(
+  File get coverFile => File(FilePath.join(
         baseDir,
         cover,
       ));
@@ -151,6 +151,8 @@ class LocalManager with ChangeNotifier {
   /// path to the directory where all the comics are stored
   late String path;
 
+  Directory get directory => Directory(path);
+
   // return error message if failed
   Future<String?> setNewPath(String newPath) async {
     var newDir = Directory(newPath);
@@ -162,7 +164,7 @@ class LocalManager with ChangeNotifier {
     }
     try {
       await copyDirectoryIsolate(
-        Directory(path),
+        directory,
         newDir,
       );
       await File(FilePath.join(App.dataPath, 'local_path')).writeAsString(newPath);
@@ -170,7 +172,7 @@ class LocalManager with ChangeNotifier {
       Log.error("IO", e, s);
       return e.toString();
     }
-    await Directory(path).deleteIgnoreError(recursive:true);
+    await directory.deleteContents(recursive: true);
     path = newPath;
     return null;
   }
@@ -217,15 +219,15 @@ class LocalManager with ChangeNotifier {
     ''');
     if (File(FilePath.join(App.dataPath, 'local_path')).existsSync()) {
       path = File(FilePath.join(App.dataPath, 'local_path')).readAsStringSync();
-      if (!Directory(path).existsSync()) {
+      if (!directory.existsSync()) {
         path = await findDefaultPath();
       }
     } else {
       path = await findDefaultPath();
     }
     try {
-      if (!Directory(path).existsSync()) {
-        await Directory(path).create();
+      if (!directory.existsSync()) {
+        await directory.create();
       }
     }
     catch(e, s) {
@@ -354,12 +356,12 @@ class LocalManager with ChangeNotifier {
       throw "Invalid ep";
     }
     var comic = find(id, type) ?? (throw "Comic Not Found");
-    var directory = openDirectoryPlatform(comic.baseDir);
+    var directory = Directory(comic.baseDir);
     if (comic.chapters != null) {
       var cid = ep is int
           ? comic.chapters!.keys.elementAt(ep - 1)
           : (ep as String);
-      directory = openDirectoryPlatform(FilePath.join(directory.path, cid));
+      directory = Directory(FilePath.join(directory.path, cid));
     }
     var files = <File>[];
     await for (var entity in directory.list()) {
@@ -406,10 +408,10 @@ class LocalManager with ChangeNotifier {
       String id, ComicType type, String name) async {
     var comic = find(id, type);
     if (comic != null) {
-      return openDirectoryPlatform(FilePath.join(path, comic.directory));
+      return Directory(FilePath.join(path, comic.directory));
     }
     var dir = findValidDirectoryName(path, name);
-    return openDirectoryPlatform(FilePath.join(path, dir)).create().then((value) => value);
+    return Directory(FilePath.join(path, dir)).create().then((value) => value);
   }
 
   void completeTask(DownloadTask task) {
@@ -468,7 +470,7 @@ class LocalManager with ChangeNotifier {
 
   void deleteComic(LocalComic c, [bool removeFileOnDisk = true]) {
     if(removeFileOnDisk) {
-      var dir = openDirectoryPlatform(FilePath.join(path, c.directory));
+      var dir = Directory(FilePath.join(path, c.directory));
       dir.deleteIgnoreError(recursive: true);
     }
     //Deleting a local comic means that it's nolonger available, thus both favorite and history should be deleted.