private bool Select(HashSet <ICountryInfo> selected, ICountryInfo current, int count, Continent continent, bool ignoreExlusion)
{
var next = current.Borders
.Where(b => b.HasLandBorder && (ignoreExlusion || !b.Excluded) && !selected.Contains(b.Neighbor) && (continent == Continent.Unspecified || b.Neighbor.Continent == continent))
.Select(b => new { Country = b.Neighbor, Order = _random.Next() })
.OrderBy(i => i.Order)
.Take(_random.Next(1, count - selected.Count + 1))
.Select(i => i.Country)
.ToList();
selected.UnionWith(next);
if (selected.Count > count)
{
return(true);
}
foreach (var item in next)
{
if (Select(selected, item, count, continent, ignoreExlusion))
{
return(true);
}
}
return(false);
}
public CountryAnswer(ICountryInfo country, bool showName, bool showFlag)
{
Country = country;
ShowName = showName;
ShowFlag = showFlag;
}
public BorderInfo(ICountryInfo neighbor, bool hasLandBorder, bool hasMaritimeBorder, bool excluded)
{
Neighbor = neighbor;
HasLandBorder = hasLandBorder;
HasMaritimeBorder = hasMaritimeBorder;
Excluded = excluded;
}
private string GetCountryTranslatedName(ICountryInfo countryInfo, LanguageCode languageCode)
{
if (countryInfo != null && countryInfo.Translations != null && countryInfo.Translations.Length > 0)
{
return(countryInfo.Translations.Where(x => x.LanguageCode == languageCode).Select(x => x.Name).FirstOrDefault());
}
return(null);
}
public CountryQuestion(bool setOnIncorrect, ICountryInfo country, bool showName, bool showFlag)
{
_setOnIncorrect = setOnIncorrect;
State = QuestionState.Unanswered;
Country = country;
ShowName = showName;
ShowFlag = showFlag;
}
internal static CountryInfoDto Convert(ICountryInfo country)
{
return(new CountryInfoDto
{
CommonName = country.CommonName,
OfficialName = country.OfficialName,
CountryCode = country.Alpha2Code.ToString(),
Region = country.Region.ToString(),
Borders = GetBorderCountryInfos(country.BorderCountries)
});
}
private string GetCountryTranslatedName(ICountryInfo countryInfo, LanguageCode languageCode)
{
this._alpha2Code2CountryTranslation.TryGetValue(countryInfo.Alpha2Code, out var countryTranslation);
if (countryTranslation.Translations != null && countryTranslation.Translations.Length > 0)
{
return(countryTranslation.Translations.Where(x => x.LanguageCode == languageCode).Select(x => x.Name).FirstOrDefault());
}
return(null);
}
public CountryEnumValue(string countryString)
{
if (string.IsNullOrWhiteSpace(countryString))
{
throw new ArgumentNullException(nameof(countryString));
}
var length = countryString.Length;
if (length == 2 || length == 3)
{
var country = CountryManager.GetCountryInfo(countryString);
if (country != null)
{
_countryEnum = country.Country;
_countryEnumString = countryString;
_countryInfo = country;
return;
}
}
var enumMember = Enums.GetMember <Country>(countryString, true);
if (enumMember != null)
{
_countryEnum = enumMember.Value;
_countryEnumString = countryString;
_countryInfo = CountryManager.GetCountryInfo(_countryEnum);
return;
}
//历史国家的 Name 应当是 国名+建国年，比如 Yugoslavia1992
if (countryString.Length <= 4)
{
throw new ArgumentException("The length of the countryString must greater than 4.");
}
#if NETSTANDARD2_0
var year = countryString.Substring(countryString.Length - 4).CastToInt32(-1);
var countryStr = countryString.Substring(0, countryString.Length - 4);
#else
var year = countryString[^ 4..].CastToInt32(-1);
public Country(ICountryInfo info)
{
this.CallingCode = info.CallingCodes.First();
this.CountryCode = info.Alpha2Code.ToString();
this.Name = info.OfficialName;
}
/// <summary>
/// Get region code / CEP-1 from <see cref="CountryInfo"/>.
/// </summary>
/// <param name="country"></param>
/// <returns></returns>
public static long GetRegionCode(this ICountryInfo country)
{
return(country?.Cep1CrCode ?? throw new ArgumentNullException(nameof(country)));
}
public CountryEnumValue(Country country)
{
_countryEnum = country;
_countryEnumString = country.GetName();
_countryInfo = CountryManager.GetCountryInfo(country);
}
protected override IQuestion CreateQuestion(ICountryInfo country)
{
return(new CountryQuestion(true, country, true, true));
}
public Country(ICountryInfo countryInfo)
{
_countryInfo = countryInfo;
}
protected abstract IQuestion CreateQuestion(ICountryInfo country);
protected override IQuestion CreateQuestion(ICountryInfo country)
{
return(new CountryQuestion(true, country, _direction == Direction.GuessFlag, _direction == Direction.GuessName));
}
