opt: danmaku filter (#486)

lib/models/user/danmaku_block.dart

@@ -1,5 +1,5 @@
 class DanmakuBlockDataModel {
-  List<Rule>? rule;
+  List<SimpleRule>? rule;
   String? toast;
   int? valid;
   int? ver;
@@ -7,88 +7,22 @@ class DanmakuBlockDataModel {
   DanmakuBlockDataModel({this.rule, this.toast, this.valid, this.ver});
 
   DanmakuBlockDataModel.fromJson(Map<String, dynamic> json) {
-    if (json['rule'] != null) {
-      rule = <Rule>[];
-      json['rule'].forEach((v) {
-        rule!.add(Rule.fromJson(v));
-      });
-    }
+    rule = (json['rule'] as List?)?.map((v) => SimpleRule.fromJson(v)).toList();
     toast = json['toast'];
     valid = json['valid'];
     ver = json['ver'];
   }
-
-  Map<String, dynamic> toJson() {
-    final Map<String, dynamic> data = <String, dynamic>{};
-    if (rule != null) {
-      data['rule'] = rule!.map((v) => v.toJson()).toList();
-    }
-    data['toast'] = toast;
-    data['valid'] = valid;
-    data['ver'] = ver;
-    return data;
-  }
-}
-
-class Rule {
-  int? id;
-  int? mid;
-  int? type;
-  String? filter;
-  String? comment;
-  int? ctime;
-  int? mtime;
-
-  Rule(
-      {this.id,
-      this.mid,
-      this.type,
-      this.filter,
-      this.comment,
-      this.ctime,
-      this.mtime});
-
-  Rule.fromJson(Map<String, dynamic> json) {
-    id = json['id'];
-    mid = json['mid'];
-    type = json['type'];
-    filter = json['filter'];
-    comment = json['comment'];
-    ctime = json['ctime'];
-    mtime = json['mtime'];
-  }
-
-  Map<String, dynamic> toJson() {
-    final Map<String, dynamic> data = <String, dynamic>{};
-    data['id'] = id;
-    data['mid'] = mid;
-    data['type'] = type;
-    data['filter'] = filter;
-    data['comment'] = comment;
-    data['ctime'] = ctime;
-    data['mtime'] = mtime;
-    return data;
-  }
 }
 
 class SimpleRule {
-  final int id;
-  final int type;
-  String filter;
+  late final int id;
+  late final int type;
+  late String filter;
   SimpleRule(this.id, this.type, this.filter);
-  Map<String, dynamic> toMap() {
-    return {
-      'id': id,
-      'type': type,
-      'filter': filter,
-    };
-  }
 
-  factory SimpleRule.fromMap(Map<String, dynamic> map) {
-    return SimpleRule(
-      map['id'],
-      map['type'],
-      map['filter'],
-    );
+  SimpleRule.fromJson(Map<String, dynamic> json) {
+    id = json['id'];
+    type = json['type'];
+    filter = json['filter'];
   }
 }