Feat:使用OpenL进行翻译

.gitignore

@@ -41,7 +41,7 @@ app.*.symbols
 app.*.map.json
 
 # Exceptions to above rules.
-!/packages/flutter_tools/test/data/dart_dependencies_test/**/.packages
+/packages/flutter_tools/test/data/dart_dependencies_test/**/.packages
 /ios/build/
 /ios/Podfile.lock
 /ios/Runner/GoogleService-Info.plist
@@ -56,3 +56,4 @@ app.*.map.json
 /test/
 /linux/
 .fvm
+/assets/openl.json

assets/openl.json.sample

@@ -0,0 +1,4 @@
+// 填入自己的OpenL apikey (https://openl.club/), 并修改文件名为 openl.json
+{
+  "apikey": "abcabcacb"
+}

jsons/openl_translation.json

@@ -0,0 +1,7 @@
+{
+  "status?": true,
+  "text?": "HTML elements",
+  "result?": "HTML元素",
+  "source_lang?": "auto",
+  "target_lang?": "zh"
+}

lib/models/dns_config.dart

@@ -1,5 +1,5 @@
 import 'package:flutter/foundation.dart';
-
+import 'dns_cache.dart';
 import 'dns_cache.dart';
 
 @immutable

lib/models/gallery_comment.dart

@@ -1,5 +1,4 @@
 import 'package:flutter/foundation.dart';
-
 import 'gallery_comment_span.dart';
 
 @immutable

lib/models/gallery_item.dart

@@ -1,10 +1,9 @@
 import 'package:flutter/foundation.dart';
-
-import 'gallery_comment.dart';
-import 'gallery_preview.dart';
 import 'gallery_torrent.dart';
 import 'simple_tag.dart';
 import 'tag_group.dart';
+import 'gallery_comment.dart';
+import 'gallery_preview.dart';
 
 @immutable
 class GalleryItem {

lib/models/index.dart

@@ -1,24 +1,25 @@
-export 'advance_search.dart';
-export 'auto_lock.dart';
-export 'cache_config.dart';
+export 'local_fav.dart';
+export 'eh_config.dart';
+export 'simple_tag.dart';
 export 'commit_vote_res.dart';
-export 'dns_cache.dart';
-export 'dns_config.dart';
-export 'download_config.dart';
+export 'auto_lock.dart';
+export 'gallery_item.dart';
 export 'download_task_info.dart';
-export 'eh_config.dart';
-export 'favcat.dart';
+export 'dns_config.dart';
 export 'gallery_cache.dart';
-export 'gallery_comment.dart';
 export 'gallery_comment_span.dart';
-export 'gallery_item.dart';
-export 'gallery_preview.dart';
+export 'gallery_comment.dart';
+export 'openl_translation.dart';
 export 'gallery_tag.dart';
-export 'gallery_torrent.dart';
-export 'local_fav.dart';
-export 'profile.dart';
-export 'simple_tag.dart';
-export 'tab_config.dart';
+export 'dns_cache.dart';
 export 'tab_item.dart';
-export 'tag_group.dart';
 export 'user.dart';
+export 'download_config.dart';
+export 'gallery_torrent.dart';
+export 'advance_search.dart';
+export 'tag_group.dart';
+export 'tab_config.dart';
+export 'favcat.dart';
+export 'cache_config.dart';
+export 'gallery_preview.dart';
+export 'profile.dart';

lib/models/local_fav.dart

@@ -1,5 +1,4 @@
 import 'package:flutter/foundation.dart';
-
 import 'gallery_item.dart';
 
 @immutable

lib/models/openl_translation.dart

@@ -0,0 +1,66 @@
+import 'package:flutter/foundation.dart';
+
+
+@immutable
+class OpenlTranslation {
+
+  const OpenlTranslation({
+    this.status,
+    this.text,
+    this.result,
+    this.sourceLang,
+    this.targetLang,
+  });
+
+  final bool? status;
+  final String? text;
+  final String? result;
+  final String? sourceLang;
+  final String? targetLang;
+
+  factory OpenlTranslation.fromJson(Map<String,dynamic> json) => OpenlTranslation(
+    status: json['status'] != null ? json['status'] as bool : null,
+    text: json['text'] != null ? json['text'] as String : null,
+    result: json['result'] != null ? json['result'] as String : null,
+    sourceLang: json['source_lang'] != null ? json['source_lang'] as String : null,
+    targetLang: json['target_lang'] != null ? json['target_lang'] as String : null
+  );
+
+  Map<String, dynamic> toJson() => {
+    'status': status,
+    'text': text,
+    'result': result,
+    'source_lang': sourceLang,
+    'target_lang': targetLang
+  };
+
+  OpenlTranslation clone() => OpenlTranslation(
+    status: status,
+    text: text,
+    result: result,
+    sourceLang: sourceLang,
+    targetLang: targetLang
+  );
+
+
+  OpenlTranslation copyWith({
+    bool? status,
+    String? text,
+    String? result,
+    String? sourceLang,
+    String? targetLang
+  }) => OpenlTranslation(
+    status: status ?? this.status,
+    text: text ?? this.text,
+    result: result ?? this.result,
+    sourceLang: sourceLang ?? this.sourceLang,
+    targetLang: targetLang ?? this.targetLang,
+  );  
+
+  @override
+  bool operator ==(Object other) => identical(this, other) 
+    || other is OpenlTranslation && status == other.status && text == other.text && result == other.result && sourceLang == other.sourceLang && targetLang == other.targetLang;
+
+  @override
+  int get hashCode => status.hashCode ^ text.hashCode ^ result.hashCode ^ sourceLang.hashCode ^ targetLang.hashCode;
+}

lib/models/tab_config.dart

@@ -1,5 +1,4 @@
 import 'package:flutter/foundation.dart';
-
 import 'tab_item.dart';
 
 @immutable

lib/models/tag_group.dart

@@ -1,5 +1,4 @@
 import 'package:flutter/foundation.dart';
-
 import 'gallery_tag.dart';
 
 @immutable

lib/models/user.dart

@@ -1,5 +1,4 @@
 import 'package:flutter/foundation.dart';
-
 import 'favcat.dart';
 
 @immutable

lib/pages/gallery/view/translator_dialog.dart

@@ -1,5 +1,6 @@
 import 'package:fehviewer/const/theme_colors.dart';
 import 'package:fehviewer/utils/logger.dart';
+import 'package:fehviewer/utils/openl/translator_helper.dart';
 import 'package:fehviewer/utils/vibrate.dart';
 import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
@@ -36,13 +37,22 @@ class TranslatorDialogView extends StatefulWidget {
 class _TranslatorDialogViewState extends State<TranslatorDialogView> {
   final GoogleTranslator _translator = GoogleTranslator();
 
-  late Future<Translation?> _future;
+  late Future<String?> _future;
 
-  Future<Translation?> _getTrans() async {
+  Future<String?> _getTrans() async {
     try {
       final Translation _trans =
           await _translator.translate(widget.inputText, to: 'zh-cn');
-      return _trans;
+      return _trans.text;
+    } catch (e, stack) {
+      logger.e('$e\n$stack');
+      return null;
+    }
+  }
+
+  Future<String?> _getTransOpenL() async {
+    try {
+      return await TranslatorHelper.translateText(widget.inputText, to: 'zh');
     } catch (e, stack) {
       logger.e('$e\n$stack');
       return null;
@@ -52,12 +62,13 @@ class _TranslatorDialogViewState extends State<TranslatorDialogView> {
   @override
   void initState() {
     super.initState();
-    _future = _getTrans();
+    // _future = _getTrans();
+    _future = _getTransOpenL();
   }
 
   @override
   Widget build(BuildContext context) {
-    return FutureBuilder<Translation?>(
+    return FutureBuilder<String?>(
         future: _future,
         builder: (context, snapshot) {
           if (snapshot.connectionState == ConnectionState.done) {
@@ -81,7 +92,7 @@ class _TranslatorDialogViewState extends State<TranslatorDialogView> {
                 child: Container(
                   width: double.infinity,
                   child: Text(
-                    _trans?.text ?? '',
+                    _trans ?? '',
                     textAlign: TextAlign.start,
                     style: TextStyle(
                       height: 1.5,

lib/utils/openl/language.dart

@@ -0,0 +1,56 @@
+/// Language object with name and code (ISO)
+class Language {
+  Language(this.code, this.name);
+  final String name;
+  final String code;
+
+  @override
+  String toString() => name;
+}
+
+/// Language list containing all languages supported by openl Translate API
+class LanguageList {
+  static final Map<String, String> _langs = {
+    'auto': 'Automatic',
+    'zh': 'Chinese',
+    'en': 'English',
+    'de': 'German',
+    'fr': 'French',
+    'it': 'Italian',
+    'ja': 'Japanese',
+    'es': 'Spanish',
+    'nl': 'Dutch',
+    'pl': 'Polish',
+    'pt': 'Portuguese',
+    'ru': 'Russian',
+  };
+
+  Language operator [](String code) {
+    code = code.toLowerCase();
+    if (_langs.containsKey(code)) {
+      return Language(code, _langs[code]!);
+    }
+    throw LanguageNotSupportedException('$code is not a supported language.');
+  }
+
+  static bool contains(String codeOrLang) {
+    if (_langs.containsKey(codeOrLang) ||
+        _langs.containsValue(codeOrLang.toCamelCase())) {
+      return true;
+    }
+    return false;
+  }
+}
+
+class LanguageNotSupportedException implements Exception {
+  LanguageNotSupportedException(String lang)
+      : msg = '$lang is not a supported language.';
+
+  final String msg;
+}
+
+extension _CamelCase on String {
+  String toCamelCase() {
+    return '${this[0].toUpperCase()}${substring(1).toLowerCase()}';
+  }
+}

lib/utils/openl/openl_translator.dart

@@ -0,0 +1,50 @@
+import 'dart:convert' show jsonDecode, jsonEncode;
+
+import 'package:fehviewer/models/base/eh_models.dart';
+import 'package:fehviewer/utils/openl/language.dart';
+
+import 'package:http/http.dart' as http;
+
+const String _baseUrl = 'api.openl.club';
+
+class OpenLTranslator {
+  OpenLTranslator({required this.apikey});
+
+  final String apikey;
+
+  Future<OpenlTranslation> translate(
+    String sourceText, {
+    String from = 'auto',
+    String to = 'en',
+    String service = 'deepl',
+  }) async {
+    for (final String each in [from, to]) {
+      if (!LanguageList.contains(each)) {
+        throw LanguageNotSupportedException(each);
+      }
+    }
+
+    final String _path = '/services/$service/translate';
+
+    final Map<String, String> reqMap = {
+      'apikey': apikey,
+      'text': sourceText,
+      'source_lang': from,
+      'target_lang': to,
+    };
+
+    final Uri url = Uri.https(_baseUrl, _path);
+    final data = await http.post(url, body: jsonEncode(reqMap));
+
+    if (data.statusCode != 200) {
+      throw http.ClientException('Error ${data.statusCode}: ${data.body}', url);
+    }
+
+    final jsonData = jsonDecode(data.body);
+    if (jsonData == null) {
+      throw http.ClientException('Error: Can\'t parse json data');
+    }
+
+    return OpenlTranslation.fromJson(jsonData);
+  }
+}

lib/utils/openl/translator_helper.dart

@@ -0,0 +1,43 @@
+import 'dart:async';
+import 'dart:convert';
+
+import 'package:fehviewer/models/openl_translation.dart';
+import 'package:fehviewer/utils/logger.dart';
+import 'package:fehviewer/utils/openl/openl_translator.dart';
+import 'package:flutter/services.dart';
+
+class TranslatorHelper {
+  static Future<String> getApikey() async {
+    final String openl = await rootBundle.loadString('assets/openl.json');
+    final openlJson = json.decode(openl);
+    return openlJson['apikey'] ?? '';
+  }
+
+  static Future<OpenlTranslation> translate(
+    String sourceText, {
+    String from = 'auto',
+    String to = 'en',
+    String service = 'deepl',
+  }) async {
+    final String apikey = await getApikey();
+
+    logger.v('apikey $apikey');
+
+    final OpenLTranslator openLTranslator = OpenLTranslator(apikey: apikey);
+    return openLTranslator.translate(sourceText, from: from, to: to);
+  }
+
+  static Future<String> translateText(
+    String sourceText, {
+    String from = 'auto',
+    String to = 'en',
+    String service = 'deepl',
+  }) async {
+    final OpenlTranslation rult =
+        await translate(sourceText, from: from, to: to);
+
+    logger.v(rult.toJson());
+
+    return rult.result ?? '';
+  }
+}