init: resolve issues of initialization process

android/app/src/main/kotlin/xyz/project/violet/MainActivity.kt

@@ -9,6 +9,7 @@ import android.view.WindowManager
 import io.flutter.embedding.android.FlutterFragmentActivity
 import io.flutter.embedding.engine.FlutterEngine
 import io.flutter.plugin.common.EventChannel
+import io.flutter.plugin.common.MethodCall
 import io.flutter.plugin.common.MethodChannel
 import io.flutter.plugin.common.MethodChannel.MethodCallHandler
 import io.flutter.plugins.GeneratedPluginRegistrant
@@ -17,6 +18,7 @@ class MainActivity : FlutterFragmentActivity() {
     private val VOLUME_CHANNEL = "xyz.project.violet/volume"
     private val NATIVELIBDIR_CHANNEL = "xyz.project.violet/nativelibdir"
     private val EXTERNAL_STORAGE_DIRECTORY_CHANNEL = "xyz.project.violet/externalStorageDirectory"
+    private val MISC_CHANNEL = "xyz.project.violet/misc"
 
     private val EXTERNAL_STORAGE_DIRECTORY_METHODS = mapOf(
             "getExternalStorageDirectory" to MethodCallHandler { call, result ->
@@ -76,6 +78,13 @@ class MainActivity : FlutterFragmentActivity() {
                 result.notImplemented()
             }
         }
+
+        MethodChannel(flutterEngine.dartExecutor.binaryMessenger, MISC_CHANNEL).setMethodCallHandler { call, result ->
+            when (call.method) {
+                "finishMainActivity" -> finishMainActivity(call, result)
+                else -> result.notImplemented()
+            }
+        }
     }
 
     override fun onKeyDown(keyCode: Int, event: KeyEvent?): Boolean {
@@ -86,4 +95,9 @@ class MainActivity : FlutterFragmentActivity() {
 
         return super.onKeyDown(keyCode, event)
     }
+
+    private fun finishMainActivity(call: MethodCall, result: MethodChannel.Result) {
+        finish()
+        result.success(null)
+    }
 }

assets/locale/en.json

@@ -305,5 +305,6 @@
   "lab": "Laboratory",
   "realtimeuserrecord": "Real Time User Record",
   "manualupdate": "Manual Update",
-  "cannotuseios": "You cannot use update on iOS :("
+  "cannotuseios": "You cannot use update on iOS :(",
+  "exitTheApp": "Exit the app"
 }

assets/locale/eo.json

@@ -305,5 +305,6 @@
   "lab": "Laboratory",
   "realtimeuserrecord": "Real Time User Record",
   "manualupdate": "Manual Update",
-  "cannotuseios": "You cannot use update on iOS :("
+  "cannotuseios": "You cannot use update on iOS :(",
+  "exitTheApp": "Exit the app"
 }

assets/locale/it.json

@@ -305,5 +305,6 @@
   "lab": "Laboratory",
   "realtimeuserrecord": "Real Time User Record",
   "manualupdate": "Manual Update",
-  "cannotuseios": "You cannot use update on iOS :("
+  "cannotuseios": "You cannot use update on iOS :(",
+  "exitTheApp": "Exit the app"
 }

assets/locale/ja.json

@@ -305,5 +305,6 @@
   "lab": "Laboratory",
   "realtimeuserrecord": "Real Time User Record",
   "manualupdate": "Manual Update",
-  "cannotuseios": "You cannot use update on iOS :("
+  "cannotuseios": "You cannot use update on iOS :(",
+  "exitTheApp": "Exit the app"
 }

assets/locale/ko.json

@@ -305,5 +305,6 @@
   "lab": "실험실",
   "realtimeuserrecord": "실시간 유저 레코드",
   "manualupdate": "수동 업데이트",
-  "cannotuseios": "iOS에선 사용할 수 없어요 :("
+  "cannotuseios": "iOS에선 사용할 수 없어요 :(",
+  "exitTheApp": "앱 종료하기"
 }

assets/locale/pt.json

@@ -305,5 +305,6 @@
   "lab": "Laboratory",
   "realtimeuserrecord": "Real Time User Record",
   "manualupdate": "Manual Update",
-  "cannotuseios": "You cannot use update on iOS :("
+  "cannotuseios": "You cannot use update on iOS :(",
+  "exitTheApp": "Exit the app"
 }

assets/locale/zh.json

@@ -305,5 +305,6 @@
   "lab": "Laboratory",
   "realtimeuserrecord": "Real Time User Record",
   "manualupdate": "Manual Update",
-  "cannotuseios": "You cannot use update on iOS :("
+  "cannotuseios": "You cannot use update on iOS :(",
+  "exitTheApp": "Exit the app"
 }

assets/locale/zh_Hans.json

@@ -305,5 +305,6 @@
   "lab": "Laboratory",
   "realtimeuserrecord": "Real Time User Record",
   "manualupdate": "Manual Update",
-  "cannotuseios": "You cannot use update on iOS :("
+  "cannotuseios": "You cannot use update on iOS :(",
+  "exitTheApp": "Exit the app"
 }

assets/locale/zh_Hant.json

@@ -305,5 +305,6 @@
   "lab": "Laboratory",
   "realtimeuserrecord": "Real Time User Record",
   "manualupdate": "Manual Update",
-  "cannotuseios": "You cannot use update on iOS :("
+  "cannotuseios": "You cannot use update on iOS :(",
+  "exitTheApp": "Exit the app"
 }

lib/component/hitomi/population.dart

@@ -3,6 +3,7 @@
 
 import 'dart:convert';
 import 'dart:io';
+import 'dart:isolate';
 
 import 'package:flutter/services.dart';
 import 'package:violet/database/query.dart';
@@ -15,18 +16,35 @@ class Population {
     String data;
 
     if (Platform.environment.containsKey('FLUTTER_TEST')) {
-      var file = File('/home/ubuntu/violet/assets/rank/population.json');
+      final file = File('/home/ubuntu/violet/assets/rank/population.json');
       data = await file.readAsString();
     } else {
       data = await rootBundle.loadString('assets/rank/population.json');
     }
 
-    List<dynamic> dataPopulation = json.decode(data);
-    population = <int, int>{};
+    Future<Map<int, int>> decodeJsonData() async {
+      final population = <int, int>{};
 
-    for (int i = 0; i < dataPopulation.length; i++) {
-      population[dataPopulation[i] as int] = i;
+      json.decode(
+        data,
+        reviver: (keyObject, valueObject) {
+          if (keyObject == null) {
+            return null;
+          }
+
+          int key = keyObject as int;
+          int value = (valueObject as num).toInt();
+
+          population[value] = key;
+
+          return null;
+        },
+      );
+
+      return population;
     }
+
+    population = await Isolate.run(decodeJsonData);
   }
 
   static void sortByPopulation(List<QueryResult> qr) {

lib/component/hitomi/related.dart

@@ -3,6 +3,7 @@
 
 import 'dart:convert';
 import 'dart:io';
+import 'dart:isolate';
 
 import 'package:flutter/services.dart';
 
@@ -13,20 +14,35 @@ class Related {
     String data;
 
     if (Platform.environment.containsKey('FLUTTER_TEST')) {
-      var file = File('/home/ubuntu/violet/assets/rank/related.json');
+      final file = File('/home/ubuntu/violet/assets/rank/related.json');
       data = await file.readAsString();
     } else {
       data = await rootBundle.loadString('assets/rank/related.json');
     }
 
-    Map<String, dynamic> dataMap = json.decode(data);
-
-    related = <int, List<int>>{};
+    Future<Map<int, List<int>>> decodeJsonData() async {
+      final related = <int, List<int>>{};
+
+      json.decode(
+        data,
+        reviver: (key, value) {
+          if (key == null) {
+            return value;
+          }
+
+          if (key is String) {
+            related[int.parse(key)] = (value as List<dynamic>).cast();
+            return null;
+          } else {
+            return value;
+          }
+        },
+      );
+
+      return related;
+    }
 
-    dataMap.entries.forEach((element) {
-      related[int.parse(element.key)] =
-          (element.value as List<dynamic>).map((e) => e as int).toList();
-    });
+    related = await Isolate.run(decodeJsonData);
   }
 
   static bool existsRelated(int articleId) {

lib/component/hitomi/tag_translate.dart

@@ -3,6 +3,7 @@
 
 import 'dart:convert';
 import 'dart:io';
+import 'dart:isolate';
 
 import 'package:flutter/services.dart';
 import 'package:tuple/tuple.dart';
@@ -21,25 +22,51 @@ class TagTranslate {
     String data;
 
     if (Platform.environment.containsKey('FLUTTER_TEST')) {
-      var file = File('/home/ubuntu/violet/assets/locale/tag/korean.json');
+      final file = File('/home/ubuntu/violet/assets/locale/tag/korean.json');
       data = await file.readAsString();
     } else {
       data = await rootBundle
           .loadString('assets/locale/tag/$defaultLanguage.json');
     }
-    Map<String, dynamic> result = json.decode(data);
-
-    _translateMap = <String, String>{};
-    _reverseAndroMap = <String, String>{};
-
-    result.entries.forEach((element) {
-      if (element.value.toString().trim() == '') return;
-      if (_translateMap.containsKey(element.key)) return;
-      _translateMap[element.key] = element.value as String;
-      _reverseAndroMap[disassembly((element.value as String)
-          .replaceAll('female:', '')
-          .replaceAll('male:', ''))] = element.key;
-    });
+
+    Future<(Map<String, String>, Map<String, String>)> decodeJsonData() async {
+      final translateMap = <String, String>{};
+      final reverseAndroMap = <String, String>{};
+
+      json.decode(
+        data,
+        reviver: (keyObject, valueObject) {
+          if (keyObject == null) {
+            return null;
+          }
+
+          final key = keyObject.toString();
+          final value = valueObject.toString();
+
+          if (value.trim().isEmpty) {
+            return null;
+          }
+
+          if (!translateMap.containsKey(key)) {
+            return null;
+          }
+
+          translateMap[key] = value;
+          reverseAndroMap[disassembly(value)
+              .replaceAll('female:', '')
+              .replaceAll('male:', '')] = key;
+
+          return null;
+        },
+      );
+
+      return (translateMap, reverseAndroMap);
+    }
+
+    final (translateMap, reverseAndroMap) = await Isolate.run(decodeJsonData);
+
+    _translateMap = translateMap;
+    _reverseAndroMap = reverseAndroMap;
   }
 
   static String of(String classification, String key) {