liangchengyou / wow_english

  // ignore_for_file: non_constant_identifier_names
  // ignore_for_file: camel_case_types
  // ignore_for_file: prefer_single_quotes
  
  // This file is automatically generated. DO NOT EDIT, all your changes would be lost.
  import 'package:flutter/material.dart' show debugPrint;

  import 'package:wow_english/models/lesson_entity.dart';
  import 'package:wow_english/models/listen_entity.dart';

  import 'package:wow_english/models/user_entity.dart';
  
  JsonConvert jsonConvert = JsonConvert();
  typedef JsonConvertFunction<T> = T Function(Map<String, dynamic> json);
  typedef EnumConvertFunction<T> = T Function(String value);
  
  class JsonConvert {
  	static final Map<String, JsonConvertFunction> convertFuncMap = {

  		(LessonEntity).toString(): LessonEntity.fromJson,
  		(ListenEntity).toString(): ListenEntity.fromJson,

  		(UserEntity).toString(): UserEntity.fromJson,
  	};
  
    T? convert<T>(dynamic value, {EnumConvertFunction? enumConvert}) {
      if (value == null) {
        return null;
      }
      if (value is T) {
        return value;
      }
      try {
        return _asT<T>(value, enumConvert: enumConvert);
      } catch (e, stackTrace) {
        debugPrint('asT<$T> $e $stackTrace');
        return null;
      }
    }
  
    List<T?>? convertList<T>(List<dynamic>? value, {EnumConvertFunction? enumConvert}) {
      if (value == null) {
        return null;
      }
      try {
        return value.map((dynamic e) => _asT<T>(e,enumConvert: enumConvert)).toList();
      } catch (e, stackTrace) {
        debugPrint('asT<$T> $e $stackTrace');
        return <T>[];
      }
    }
  
  List<T>? convertListNotNull<T>(dynamic value, {EnumConvertFunction? enumConvert}) {
      if (value == null) {
        return null;
      }
      try {
        return (value as List<dynamic>).map((dynamic e) => _asT<T>(e,enumConvert: enumConvert)!).toList();
      } catch (e, stackTrace) {
        debugPrint('asT<$T> $e $stackTrace');
        return <T>[];
      }
    }
  
    T? _asT<T extends Object?>(dynamic value,
        {EnumConvertFunction? enumConvert}) {
      final String type = T.toString();
      final String valueS = value.toString();
      if (enumConvert != null) {
        return enumConvert(valueS) as T;
      } else if (type == "String") {
        return valueS as T;
      } else if (type == "int") {
        final int? intValue = int.tryParse(valueS);
        if (intValue == null) {
          return double.tryParse(valueS)?.toInt() as T?;
        } else {
          return intValue as T;
        }
      } else if (type == "double") {
        return double.parse(valueS) as T;
      } else if (type == "DateTime") {
        return DateTime.parse(valueS) as T;
      } else if (type == "bool") {
        if (valueS == '0' || valueS == '1') {
          return (valueS == '1') as T;
        }
        return (valueS == 'true') as T;
      } else if (type == "Map" || type.startsWith("Map<")) {
        return value as T;
      } else {
        if (convertFuncMap.containsKey(type)) {
          return convertFuncMap[type]!(Map<String, dynamic>.from(value)) as T;
        } else {
          throw UnimplementedError('$type unimplemented');
        }
      }
    }
  
  	//list is returned by type
  	static M? _getListChildType<M>(List<Map<String, dynamic>> data) {

  		if(<LessonEntity>[] is M){
  			return data.map<LessonEntity>((Map<String, dynamic> e) => LessonEntity.fromJson(e)).toList() as M;
  		}
  		if(<ListenEntity>[] is M){
  			return data.map<ListenEntity>((Map<String, dynamic> e) => ListenEntity.fromJson(e)).toList() as M;
  		}

  		if(<UserEntity>[] is M){
  			return data.map<UserEntity>((Map<String, dynamic> e) => UserEntity.fromJson(e)).toList() as M;
  		}
  
  		debugPrint("${M.toString()} not found");

  		return null;
  }
  
  	static M? fromJsonAsT<M>(dynamic json) {
  		if (json is List) {
  			return _getListChildType<M>(json.map((e) => e as Map<String, dynamic>).toList());
  		} else {
  			return jsonConvert.convert<M>(json);
  		}
  	}

  }