/// <summary>
/// Инициализирует класс <see cref="Survey"/>
/// </summary>
/// <param name="Subject">Предмет</param>
/// <param name="Theme">Тема</param>
/// <param name="Question">Вопрос</param>
public Survey(String Name, String Description, String Author, params Question[] Questions)
{
this.Name = Name;
this.Description = Description;
this.Author = Author;
this.Questions = Questions.Cast <Question>().ToList();
}
private IList <IAnswer> GenerateAnswers(ICountryQuestion question)
{
var country = question.Country;
var isHard = Difficulty == Difficulty.Hard;
var isNormal = Difficulty == Difficulty.Normal;
var excluded = new HashSet <ICountryInfo>(Questions
.Cast <ICountryQuestion>()
.Where(o => o == question || o.State == QuestionState.Correct || (o.State == QuestionState.Incorrect && !isHard))
.Select(o => o.Country));
IEnumerable <ICountryInfo> source = Questions
.Cast <ICountryQuestion>()
.Select(o => o.Country)
.Where(c => !excluded.Contains(c))
.Select(c => new { Country = c, Order = _random.Next() })
.OrderBy(i => i.Order)
.Select(i => i.Country)
.Union(_randomizedContryList
.Where(c => !excluded.Contains(c))
.Skip(_random.Next() % (_randomizedContryList.Count - excluded.Count - 7)))
.ToList();
var count = 5;
if (isNormal || isHard)
{
source = country.Borders
.Where(b => !b.Excluded && !excluded.Contains(b.Neighbor))
.Select(b => b.Neighbor)
.Select(c => new { Country = c, Order = _random.Next() })
.OrderBy(i => i.Order)
.Select(i => i.Country)
.Union(source)
.ToList();
count = 7;
}
return(source
.Distinct()
.Take(count)
.Union(Enumerable.Repeat(country, 1))
.OrderBy(c => c.AdministrativeName)
.Select(c => new CountryAnswer(c, !isHard, true) as IAnswer)
.ToList());
}