protected override async Task HandleCore(GenerateScheduleCommand request)
{
//In more complex scenario we can introduce repository and UOW to be able to inject them
// sample of UOW + repos can be found here https://github.com/Boychenko/sample-todo/tree/master/server/Core
//and add tests to handlers but often there are should pretty simple logic
var engineers = await _context.Engineers.ToListAsync();
var lastDueDateEntries = await _context.ScheduleEntries
.OrderByDescending(e => e.Date)
.Take(Constants.ShiftsPerDay)
.ToListAsync();
var generationRequest = new ScheduleGenerationRequest
{
Engineers = engineers,
LastDueDayEntries = lastDueDateEntries,
Date = DateTime.Today
};
var result = _scheduleGenerator.GenerateSchedule(generationRequest);
if (result.Any())
{
foreach (var entry in result)
{
_context.Add(entry);
}
await _context.SaveChangesAsync();
}
}
public List <ScheduleEntry> GenerateSchedule(ScheduleGenerationRequest request)
{
var date = request.Date;
//var week = WorkingWeek.GetThisOrUpcoming(date);
var week = new WorkingWeek(date);
var lastDueDayEntries = request.LastDueDayEntries;
var lastEntryDate = lastDueDayEntries.LastOrDefault()?.Date;
if (!date.IsWeekDay() || week.Contains(lastEntryDate))
{
week = week.GetNext();
}
if (lastEntryDate.HasValue)
{
//if week have entries or future entries exists just exit
if (!week.IsAfter(lastEntryDate))
{
return(new List <ScheduleEntry>());
}
//entries is too old to consider
var previousWeek = week.GetPrevious();
if (!previousWeek.Contains(lastEntryDate))
{
lastDueDayEntries = new List <ScheduleEntry>();
}
}
var result = GenerateSchedule(request.Engineers, week, lastDueDayEntries);
if (week.Contains(date)) //first call was for current week let generate one more
{
result.AddRange(
GenerateSchedule(
request.Engineers, week.GetNext(),
result.TakeLast(Constants.ShiftsPerDay).ToList()));
}
return(result);
}
