// GET: Lesson
public IActionResult Index(string teacher = null, string subject = null, string dayOfWeek = null)
{
var filters = new Predicate <Lesson>[] {
x => string.IsNullOrWhiteSpace(teacher) || x.Teacher?.Id.ToString() == teacher,
x => string.IsNullOrWhiteSpace(subject) || x.Subject.ToString() == subject,
x => string.IsNullOrWhiteSpace(dayOfWeek) || x.DayOfWeek.ToString() == dayOfWeek
};
var lessons = _context.Lessons
.Include(l => l.Room)
.Join(
_context.Teachers,
l => l.TeacherId,
t => t.Id,
(l, t) => new Tuple <Lesson, Teacher>(l, t)
)
.ToList()
.Where(x => filters.All(filter => filter(x.Item1)));
ViewData["Teachers"] = new SelectList(new object[] { new { Id = "", FullName = "(כולם)" } }.Concat(_context.Teachers), "Id", "FullName", teacher);
var parseSubject = Enum.TryParse <Subject>(subject, out var subjectValue);
ViewData["Subjects"] = (parseSubject ? subjectValue : 0).ToSelectList(withEmpty: true);
var parseDay = Enum.TryParse <DayOfWeek>(dayOfWeek, out var dayValue);
ViewData["DaysOfWeek"] = (parseDay ? dayValue : (DayOfWeek)(-1)).ToSelectList(GetDayDisplayName, true);
return(View(lessons));
}
public bool validate(string domain)
{
var levelNames = domain.Split(DomainSeparator);
Predicate <string>[] domainLevelValidators = new Predicate <string>[] {
(string d) => d.Length <= 253,
};
Predicate <string[]>[] levelNameListValidators = new Predicate <string[]>[] {
(string[] lns) => lns.Length <= 127 && lns.Length > 1,
(string[] lns) => !Int32.TryParse(lns.Last(), out _)
};
Predicate <string>[] levelNameValidators = new Predicate <string>[] {
(string ln) => ln.Length > 0 && ln.Length < 64,
(string ln) => !ln.StartsWith(MinusCharacter) && !ln.EndsWith(MinusCharacter),
(string ln) => ln.All(c =>
(Char.IsLetterOrDigit(c) && (c < 128)) || c == MinusCharacter)
};
return(domainLevelValidators.All(p => p.Invoke(domain)) &&
levelNameListValidators.All(p => p.Invoke(levelNames)) &&
levelNames.All(ln => levelNameValidators.All(p => p.Invoke(ln))));
}
/// <summary>
/// Search users from repository according searchCriteria
/// </summary>
/// <param name="criteria">array of predicate search criterias</param>
public IEnumerable<int> SearchForUser(Predicate<User>[] criteria)
{
if (criteria == null)
throw new ArgumentNullException();
return _users.Where(x => criteria.All(e => e.Invoke(x.Value))).Select(x => x.Key);
}
/// <summary>
/// Search users by predicates
/// </summary>
/// <param name="criteria">array of predicate search criterias</param>
public IEnumerable<int> SearchForUser(Predicate<User>[] criteria)
{
if (criteria == null)
{
ts.TraceInformation($"Argument null exception in search request at slave in {AppDomain.CurrentDomain.FriendlyName}");
throw new ArgumentNullException();
}
rwls.EnterReadLock();
try
{
ts.TraceInformation($"SearchForUser request in SlaveService at {DateTime.Now} in {AppDomain.CurrentDomain.FriendlyName}");
return _tempData.Where(x => criteria.All(e => e.Invoke(x.Value))).Select(x => x.Key);
}
finally
{
rwls.ExitReadLock();
}
}
