AccountingNext/Schaad.Accounting.UI/Components/Pages/Dialogs/BookingRuleDialog.razor
Claudio Schaad f9084dc074 PR P: full async I/O top to bottom (item 19)
Every repository, service, Blazor page/dialog, and test now uses
async/await. Single atomic diff; the codebase does not compile in
intermediate states.

- BaseRepository: LoadListAsync/LoadAsync/SaveAsync return Task<T>;
  per-file locks use SemaphoreSlim so waiters can await; Save
  serialises to a MemoryStream sync (XmlSerializer has no async
  form), then File.WriteAllBytesAsync + sync File.Move.
- RepositoryCache.GetOrLoadAsync takes a Func<Task<List<T>>>.
- All 7 repository interfaces + implementations async.
- All service interfaces + implementations async (except vendor
  IFxService and stateless IFxConverter / SettingsService).
- Every Blazor OnInitializedAsync switches to await base.
- Test suite fully async, 42 tests pass.

AccountRepository.EnsureAccountsFile keeps two .GetAwaiter().GetResult()
bridges because it runs from the constructor.

Null-render guard follow-up (folded in):
Blazor now renders the component once with fields at their initial
values while OnInitializedAsync awaits — so fields declared `= null!`
are actually null on that first render and things like
`accounts.GroupBy(...)` throw ArgumentNullException. Fixed across
Transactions, BalanceReport, BalanceSheetReport, ProfitLossReport,
DetailReport, Assets, Spendings, SpendingsOverTime, TransactionDialog,
TransactionSplitDialog, and BookingRuleDialog:
- Collection fields initialise to [] so first-render loops are empty.
- Single-object data fields become nullable; the razor wraps
  consumption in `@if (field is null) { <p>Lädt…</p> return; }`.
- <PlotlyChart> guarded behind a null check on config/layout/data so
  Plotly.Blazor's @bind doesn't see nulls.
- Header/footer strings initialise to "" instead of null!.

Architectural hygiene on a single-user local Blazor Server app: the
observed win is one File.ReadAllBytesAsync and one
File.WriteAllBytesAsync per Load/Save, and after PR D each file is
loaded at most once per SignalR circuit.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
2026-07-03 18:30:44 +02:00

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@using Schaad.Accounting.Models
@implements IDialogContentComponent<Schaad.Accounting.Models.BookingRule>
@rendermode InteractiveServer
<FluentDialogHeader ShowDismiss="true">
<FluentStack VerticalAlignment="VerticalAlignment.Center">
<FluentIcon Value="@(new Icons.Regular.Size24.WindowApps())" />
<FluentLabel Typo="Typography.PaneHeader">
@Dialog.Instance.Parameters.Title
</FluentLabel>
</FluentStack>
</FluentDialogHeader>
<FluentDialogBody>
@if (editContext is null)
{
<p>Lädt…</p>
return;
}
<EditForm EditContext="@editContext">
<DataAnnotationsValidator />
<FluentTextField @bind-Value="@Content.LookupText" Label="Suchtext" Style="width: 300px;"/>
<FluentNumberField @bind-Value="@Content.LookupValue" Label="Suchbetrag" Style="width: 300px;"/>
<FluentTextField @bind-Value="@Content.BookingText" Label="Buchungstext" Style="width: 300px;" />
<FluentSelect TOption="Account"
Label="Konto"
Items="@accounts"
Width="300px"
Height="250px"
Required="true"
Placeholder="Konto auswählen..."
OptionValue="@(p => p.Id)"
OptionText="@(p => p.Number + " / " + p.Name)"
@bind-Value="@Content.AccountId" />
<div>
<FluentValidationSummary />
</div>
</EditForm>
</FluentDialogBody>
<FluentDialogFooter>
<FluentButton Appearance="Appearance.Neutral"
OnClick="@CancelAsync">
Abbrechen
</FluentButton>
<FluentButton Appearance="Appearance.Accent"
OnClick="@SaveAsync">
Speichern
</FluentButton>
</FluentDialogFooter>