AccountingNext/Schaad.Accounting.UI/Components/Pages/Charts/SpendingsOverTime.razor.cs
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

60 lines
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1.6 KiB
C#

using Microsoft.AspNetCore.Components;
using Plotly.Blazor;
using Plotly.Blazor.LayoutLib;
using Plotly.Blazor.Traces;
using Schaad.Accounting.Interfaces;
namespace Schaad.Accounting.UI.Components.Pages.Charts;
public partial class SpendingsOverTime : ComponentBase
{
private PlotlyChart chart = null!;
private Config? config;
private Plotly.Blazor.Layout? layout;
private IList<ITrace> data = new List<ITrace>();
[Inject]
private IChartService chartService { get; set; } = null!;
protected override async Task OnInitializedAsync()
{
config = new Config
{
Responsive = true
};
layout = new Plotly.Blazor.Layout
{
Title = new Title { Text = "Ausgaben im Verlauf" },
BarMode = BarModeEnum.Stack,
YAxis = new List<YAxis>
{
new()
{
Title = new Plotly.Blazor.LayoutLib.YAxisLib.Title { Text = "CHF" }
}
},
XAxis = new List<XAxis>
{
new()
{
Type = Plotly.Blazor.LayoutLib.XAxisLib.TypeEnum.Date
}
}
};
var dataSeries = await chartService.GetExpensesPerMonthAsync();
foreach (var dataSerie in dataSeries)
{
data.Add(new Bar
{
Name = dataSerie.Name,
X = dataSerie.X.Select(d => (object)d).ToList(),
Y = dataSerie.Y.Select(d => (object)d).ToList(),
});
};
await base.OnInitializedAsync();
}
}