/// <summary>
/// Guaranteed that data won't be null
/// </summary>
/// <param name="data"></param>
/// <returns>Should always return an initialized list.</returns>
private static async Task <List <BaseViewItemHomeworkExam> > getAllUpcomingBlocking(AccountDataItem account, AccountDataStore data, DateTime todayAsUtc, BaseUpcomingTileSettings tileSettings)
{
var currSemesterId = account.CurrentSemesterId;
if (currSemesterId == Guid.Empty)
{
return(new List <BaseViewItemHomeworkExam>());
}
ScheduleViewItemsGroup scheduleViewGroup;
try
{
scheduleViewGroup = await ScheduleViewItemsGroup.LoadAsync(account.LocalAccountId, account.CurrentSemesterId, trackChanges : true, includeWeightCategories : false);
}
catch
{
// If semester not found
return(new List <BaseViewItemHomeworkExam>());
}
DateTime dateToStartDisplayingFrom = DateTime.SpecifyKind(tileSettings.GetDateToStartDisplayingOn(todayAsUtc), DateTimeKind.Utc);
var agendaViewGroup = await AgendaViewItemsGroup.LoadAsync(account.LocalAccountId, scheduleViewGroup.Semester, DateTime.SpecifyKind(todayAsUtc, DateTimeKind.Local), trackChanges : true);
// We're not going to worry about locking changes while we enumerate, since if collection changes while we're enumerating, there'll be a
// new incoming reset request anyways
// Agenda view group doesn't sort, so we have to sort it
return(agendaViewGroup.Items.Where(
i => i.Date.Date >= dateToStartDisplayingFrom &&
((tileSettings.ShowHomework && i is ViewItemHomework) || (tileSettings.ShowExams && i is ViewItemExam))
).OrderBy(i => i).ToList());
}
protected override async Task LoadAsyncOverride()
{
AgendaViewItemsGroup = await AgendaViewItemsGroup.LoadAsync(MainScreenViewModel.CurrentLocalAccountId, MainScreenViewModel.CurrentSemester, Today);
AgendaViewItemsGroup.Items.CollectionChanged += new WeakEventHandler <NotifyCollectionChangedEventArgs>(Items_CollectionChanged).Handler;
UpdateHasNoItems();
ListenToLocalEditsFor <DataLayer.DataItems.DataItemMegaItem>().ChangedItems += ItemsLocallyEditedListener_ChangedItems;
}
private static async Task <AgendaViewItemsGroup> GetAgendaViewItemsGroup(AccountDataItem account, DateTime today)
{
try
{
// We're getting cached versions which might change as we're using the app, but that's fine, since if items change, another
// ResetReminders will be incoming anyways
var scheduleViewItemsGroup = await ScheduleViewItemsGroup.LoadAsync(account.LocalAccountId, account.CurrentSemesterId, trackChanges : true, includeWeightCategories : false);
return(await AgendaViewItemsGroup.LoadAsync(account.LocalAccountId, scheduleViewItemsGroup.Semester, today, trackChanges : true));
}
// If semester didn't exist, it throws null reference exception
catch { return(null); }
}
private async Task ResetReminders(AccountDataItem account, CancellationToken token)
{
if (account == null)
{
return;
}
ClearReminders(account.LocalAccountId, token);
token.ThrowIfCancellationRequested();
var semesterId = account.CurrentSemesterId;
if (semesterId == Guid.Empty)
{
return;
}
DateTime todayAsUtc = DateTime.SpecifyKind(DateTime.Today, DateTimeKind.Utc);
ViewItemTaskOrEvent[] itemsDueTodayOrGreater;
ViewItemSchedule[] allSchedules;
try
{
ScheduleViewItemsGroup viewModelSchedule = await ScheduleViewItemsGroup.LoadAsync(account.LocalAccountId, semesterId, trackChanges : true, includeWeightCategories : false);
AgendaViewItemsGroup viewModel = await AgendaViewItemsGroup.LoadAsync(account.LocalAccountId, viewModelSchedule.Semester, DateTime.SpecifyKind(todayAsUtc, DateTimeKind.Local), trackChanges : true);
// Data we need to load and hold are...
// - Items due today or greater
// - All schedules
// We don't need to worry about holding a lock though, if the collections change and that breaks us, that's fine,
// that implies that the data has been changed anyways and another ResetReminders will come in.
// Therefore we should also expect to get some exceptions here.
allSchedules = viewModelSchedule.Classes.SelectMany(i => i.Schedules).ToArray();
itemsDueTodayOrGreater = viewModel.Items.Where(i => i.Date.Date >= DateTime.SpecifyKind(todayAsUtc, DateTimeKind.Local)).ToArray();
}
catch
{
// Semester wasn't found or other misc error
return;
}
// Since we're no longer inside the lock and we're using a view group that tracks changes, any properties we access on the view items could change at any time.
// Therefore we need to take that into consideration and be careful about what we do.
if (account.RemindersDayBefore)
{
Dictionary <DateTime, List <ViewItemTaskOrEvent> > groupedByDay = new Dictionary <DateTime, List <ViewItemTaskOrEvent> >();
DateTime tomorrow = DateTime.SpecifyKind(todayAsUtc.AddDays(1), DateTimeKind.Local);
//select all incomplete tasks/events that is due on tomorrow or later
foreach (ViewItemTaskOrEvent h in itemsDueTodayOrGreater.Where(i => i.Date.Date >= tomorrow))
{
token.ThrowIfCancellationRequested();
var hDate = h.Date.Date;
if (!groupedByDay.TryGetValue(hDate, out List <ViewItemTaskOrEvent> group))
{
group = new List <ViewItemTaskOrEvent>();
groupedByDay[hDate] = group;
}
group.Add(h);
}
foreach (var pair in groupedByDay)
{
token.ThrowIfCancellationRequested();
DateTime dueOn = pair.Key;
List <ViewItemTaskOrEvent> items = pair.Value;
DateTime reminderTime = GetDayBeforeReminderTime(dueOn.AddDays(-1), account, allSchedules);
if (!IsTimeOkay(reminderTime))
{
continue;
}
ViewItemTaskOrEvent[] tasks = items.Where(i => i.Type == TaskOrEventType.Task).ToArray();
ViewItemTaskOrEvent[] events = items.Where(i => i.Type == TaskOrEventType.Event).ToArray();
if (tasks.Length > 0)
{
XmlDocument xml = GenerateToastReminder(
tasks.Length == 1 ? "You have 1 item due tomorrow" : "You have " + tasks.Length + " items due tomorrow",
GetItemLineText(tasks[0]),
tasks.Length >= 2 ? GetItemLineText(tasks[1]) : null,
#pragma warning disable 0612
new QueryStringHelper()
#pragma warning restore 0612
.SetLocalAccountId(account.LocalAccountId)
.SetAction("DayBeforeHomeworkReminder")
.ToString()
);
string remoteId = null;
if (account.IsOnlineAccount)
{
int hashedItems = string.Join(";", tasks.Select(i => i.Identifier)).GetHashCode();
remoteId = $"PP_DayBeforeHomeworks_{account.AccountId}_{hashedItems}";
}
Schedule(
GenerateScheduledToastNotification(
xml,
reminderTime,
GetId(account), //id's don't need to be unique
remoteId)
);
}
if (events.Length > 0)
{
XmlDocument xml = GenerateToastReminder(
events.Length == 1 ? "You have 1 event tomorrow" : "You have " + events.Length + " events tomorrow",
GetItemLineText(events[0]),
events.Length >= 2 ? GetItemLineText(events[1]) : null,
#pragma warning disable 0612
new QueryStringHelper()
#pragma warning restore 0612
.SetLocalAccountId(account.LocalAccountId)
.SetAction("DayBeforeExamReminder")
.ToString()
);
string remoteId = null;
if (account.IsOnlineAccount)
{
int hashedItems = string.Join(";", events.Select(i => i.Identifier)).GetHashCode();
remoteId = $"PP_DayBeforeExams_{account.AccountId}_{hashedItems}";
}
Schedule(
GenerateScheduledToastNotification(
xml,
reminderTime,
GetId(account),
remoteId));
}
}
}
if (account.RemindersDayOf)
{
foreach (ViewItemTaskOrEvent h in itemsDueTodayOrGreater)
{
token.ThrowIfCancellationRequested();
bool hasClassTime = false;
DateTime reminderTime = GetDayOfReminderTime(h, ref hasClassTime);
if (!IsTimeOkay(reminderTime))
{
continue;
}
string subtitle = GetClassName(h) + " - ";
if (h.Type == TaskOrEventType.Task)
{
subtitle += "due ";
}
if (hasClassTime)
{
subtitle += "in one hour";
}
else
{
subtitle += "today";
}
XmlDocument xml = GenerateToastReminder(
TrimString(h.Name, 200),
subtitle,
TrimString(h.Details, 200),
ArgumentsHelper.CreateArgumentsForView(h, account.LocalAccountId).SerializeToString()
);
string remoteId = null;
if (account.IsOnlineAccount)
{
remoteId = $"PP_DayOf_{account.AccountId}_{h.Identifier}";
}
Schedule(
GenerateScheduledToastNotification(
xml,
reminderTime,
GetId(account),
remoteId));
}
}
}
private async System.Threading.Tasks.Task InitializeDataAsync()
{
List <object> items = null;
List <BaseViewItemHomeworkExam> tasks = null;
_now = DateTime.Now;
bool hasAccount = false;
bool isDisabledInSettings = false;
bool hasSemester = false;
try
{
await System.Threading.Tasks.Task.Run(async delegate
{
var account = await AccountsManager.GetLastLogin();
AccountDataStore data = null;
if (account != null)
{
data = await AccountDataStore.Get(account.LocalAccountId);
}
if (data != null)
{
hasAccount = true;
isDisabledInSettings = account.MainTileSettings.IsDisabled();
if (!isDisabledInSettings)
{
_localAccountId = account.LocalAccountId;
var currSemesterId = account.CurrentSemesterId;
if (currSemesterId != Guid.Empty)
{
ScheduleViewItemsGroup scheduleViewGroup;
try
{
scheduleViewGroup = await ScheduleViewItemsGroup.LoadAsync(account.LocalAccountId, account.CurrentSemesterId, trackChanges: true, includeWeightCategories: false);
}
catch
{
// If semester not found
scheduleViewGroup = null;
}
if (scheduleViewGroup != null)
{
DateTime dateToStartDisplayingFrom = DateTime.SpecifyKind(account.MainTileSettings.GetDateToStartDisplayingOn(_now.Date), DateTimeKind.Utc);
// We don't track changes since we need a fresh version that has been filtered right now.
// Otherwise when we update for an event expiring, if we have a cached version, that event wouldn't have expired!
var agendaViewGroup = await AgendaViewItemsGroup.LoadAsync(account.LocalAccountId, scheduleViewGroup.Semester, _now.Date, trackChanges: false);
hasSemester = true;
// We lock the outside, since we are allowing trackChanges on the view items groups (so we have a chance of loading a cached one)... and since we're on a background thread, the lists inside the
// view items groups could change while we're enumerating, hence throwing an exception. So we lock it to ensure this won't happen, and then we return a copy of the items that we need.
using (await agendaViewGroup.DataChangeLock.LockForReadAsync())
{
var filtered = agendaViewGroup.Items
.Where(i => i.Date.Date >= dateToStartDisplayingFrom);
if (!account.MainTileSettings.ShowHomework)
{
filtered = filtered.Where(i => !(i is ViewItemHomework));
}
if (!account.MainTileSettings.ShowExams)
{
filtered = filtered.Where(i => !(i is ViewItemExam));
}
// Agenda view group doesn't sort, so we have to sort it
tasks = filtered
.OrderBy(i => i)
.Take(20)
.ToList();
// Add date headers
items = new List <object>();
DateTime lastHeader = DateTime.MinValue;
foreach (var t in tasks)
{
if (lastHeader != t.Date.Date)
{
items.Add(t.Date.Date);
lastHeader = t.Date.Date;
}
items.Add(t);
}
}
}
}
}
}
});
if (items == null || items.Count == 0)
{
if (hasSemester)
{
items = new List <object>()
{
PowerPlannerResources.GetString("String_NothingDue")
};
}
else if (isDisabledInSettings)
{
items = new List <object>()
{
PowerPlannerResources.GetString("String_WidgetDisabled")
};
}
else if (hasAccount)
{
items = new List <object>()
{
PowerPlannerResources.GetString("String_NoSemester")
};
}
else
{
items = new List <object>()
{
PowerPlannerResources.GetString("String_NoAccount")
};
}
}
_items = items;
}
catch (Exception ex)
{
TelemetryExtension.Current?.TrackException(ex);
}
// Schedule next
try
{
if (tasks != null && tasks.Count > 0)
{
DateTime?nextChangeTime = GetNextAgendaChangeTime(tasks, _now);
if (nextChangeTime != null)
{
AlarmManagerHelper.Schedule(
context: _context,
receiverType: typeof(UpdateWidgetAgendaReceiver),
wakeTime: nextChangeTime.Value);
}
}
}
catch (Exception ex)
{
TelemetryExtension.Current?.TrackException(ex);
}
}