details method

Country details(String country)

FOR EXAMPLE: we want see detail of pakistan.Then we have to call "Pakistan".countryDetail will return below data as Country Model class

{ "name": "Pakistan", "topLevelDomain": ".pk", "alpha2Code": "PK", "alpha3Code": "PAK", "callingCodes": "92", "capital": "Islamabad", "altSpellings": "PK", "Pākistān", "Islamic Republic of Pakistan", "Islāmī Jumhūriya'eh Pākistān" , "subregion": "Southern Asia", "region": "Asia", "population": 220892331, "latlng": 30, 70, "demonym": "Pakistani", "area": 881912, "gini": 31.6, "timezones": "UTC+05:00", "borders": "AFG", "CHN", "IND", "IRN", "nativeName": "Pakistan", "numericCode": "586", "flags": { "svg": "https://flagcdn.com/pk.svg", "png": "https://flagcdn.com/w320/pk.png" }, "currencies": {"code": "PKR", "name": "Pakistani rupee", "symbol": "₨"} , "languages": { "iso639_1": "ur", "iso639_2": "urd", "name": "Urdu", "nativeName": "اردو" }, { "iso639_1": "en", "iso639_2": "eng", "name": "English", "nativeName": "English" } , "translations": { "br": "Pakistan", "pt": "Paquistão", "nl": "Pakistan", "hr": "Pakistan", "fa": "پاکستان", "de": "Pakistan", "es": "Pakistán", "fr": "Pakistan", "ja": "パキスタン", "it": "Pakistan", "hu": "Pakisztán" }, "flag": "https://flagcdn.com/pk.svg", "regionalBlocs": { "acronym": "SAARC", "name": "South Asian Association for Regional Cooperation" } , "cioc": "PAK", "independent": true "cities":"Peshawar","Mardan","Lahore","Islamabad".......... },

Implementation

Country details(String country) {
  String newCountryName = country.toLowerCase();

  Map<String, dynamic> myCountryDetails = countries.firstWhere(
      (e) => e["name"].toLowerCase() == newCountryName,
      orElse: () => throw UnsupportedError(
          "Your country name is incorrect make sure you entered a correct country name."));
  Map<String, dynamic> cities = countryCities.firstWhere(
      (e) => e["country"].toLowerCase() == country.toLowerCase(),
      orElse: () => throw UnsupportedError(
          "Your country name is incorrect make sure you entered a correct country name."));

  return Country.fromJson(myCountryDetails)
      .copyWith(cities: cities["city"] as List<String>);
}