M5: Blazor dashboard (MudBlazor + ApexCharts)

- MudBlazor theme (dark default) + responsive drawer/appbar layout + nav. - DashboardService read model: KPIs with period-over-period deltas, category breakdown, "what cost more/less" difference view, monthly trends. - Pages: Overview (KPI cards + DeltaChip + donut + difference table), Trends (range-select bar chart), Meters (list + source status), Import (load reference dataset + CSV dry-run preview), Admin (energy types, tariffs). Charts isolated into components to avoid the ApexCharts/MudBlazor Color/Format name clashes. - ReferenceDataImporter: one-click load of all four sheets as a starter dataset (meters, tank, tariff history, category memberships) — bundled sample CSVs copied to app output. - End-to-end render test: import creates meters + consumption; overview/meters/trends/ import/admin pages all return 200 with KPI cards rendered. 92 tests green (56 Core + 36 integration). Deferred to polish: dedicated PV & oil/consumable panels, meter-detail page, full admin CRUD, prev-year trend overlay. Claude-Session: https://claude.ai/code/session_01WujdMtMJPbxDpDnMeK22rr
2026-07-13 12:11:12 +02:00
parent 6fc710d55a
commit d5419729e5
25 changed files with 1094 additions and 74 deletions
@@ -0,0 +1,128 @@
+@page "/import"
+@rendermode InteractiveServer
+@inject MeterVault.Infrastructure.Import.ReferenceDataImporter ReferenceImporter
+@inject MeterVault.Infrastructure.Import.CsvImporter CsvImporter
+@inject ISnackbar Snackbar
+@using MeterVault.Infrastructure.Import
+
+<PageTitle>MeterVault — Import</PageTitle>
+
+<MudText Typo="Typo.h4" Class="mb-4">Import</MudText>
+
+<MudGrid>
+    <MudItem xs="12" md="6">
+        <MudPaper Class="pa-4" Elevation="2" Style="height:100%">
+            <MudText Typo="Typo.h6">Reference dataset</MudText>
+            <MudText Typo="Typo.body2" Color="Color.Secondary" Class="mb-3">
+                Load the bundled Energiebilanz sheets (electricity, water, heating oil, costs) as a
+                starter dataset with meters, tariffs and categories.
+            </MudText>
+            <MudButton Variant="Variant.Filled" Color="Color.Primary" StartIcon="@Icons.Material.Filled.CloudDownload"
+                       OnClick="LoadReferenceAsync" Disabled="_loadingReference || _referenceLoaded">
+                @(_referenceLoaded ? "Loaded" : "Load reference data")
+            </MudButton>
+            @if (_loadingReference)
+            {
+                <MudProgressLinear Indeterminate="true" Color="Color.Primary" Class="mt-3" />
+            }
+        </MudPaper>
+    </MudItem>
+
+    <MudItem xs="12" md="6">
+        <MudPaper Class="pa-4" Elevation="2" Style="height:100%">
+            <MudText Typo="Typo.h6">Dry-run a CSV</MudText>
+            <MudText Typo="Typo.body2" Color="Color.Secondary" Class="mb-3">
+                Upload a sheet and preview what would be staged (no changes are made).
+            </MudText>
+            <MudSelect T="string" @bind-Value="_profileName" Label="Sheet type" Dense="true" Class="mb-2">
+                <MudSelectItem T="string" Value="@("Strom")">Electricity (Strom)</MudSelectItem>
+                <MudSelectItem T="string" Value="@("Wasser")">Water (Wasser)</MudSelectItem>
+                <MudSelectItem T="string" Value="@("Heizöl")">Heating oil (Heizöl)</MudSelectItem>
+                <MudSelectItem T="string" Value="@("Kosten")">Costs (Kosten)</MudSelectItem>
+            </MudSelect>
+            <MudButton HtmlTag="label" Variant="Variant.Outlined" StartIcon="@Icons.Material.Filled.UploadFile" for="csvUpload">
+                Choose CSV
+            </MudButton>
+            <InputFile id="csvUpload" OnChange="PreviewAsync" accept=".csv" style="display:none" />
+        </MudPaper>
+    </MudItem>
+
+    @if (_preview is not null)
+    {
+        <MudItem xs="12">
+            <MudPaper Class="pa-4" Elevation="2">
+                <MudText Typo="Typo.h6" Class="mb-2">Preview</MudText>
+                <div class="d-flex" style="gap:2rem; flex-wrap:wrap">
+                    <MudText>Readings: <b>@_preview.Readings.Count</b></MudText>
+                    <MudText>Events: <b>@_preview.Events.Count</b></MudText>
+                    <MudText>Manual costs: <b>@_preview.ManualCosts.Count</b></MudText>
+                    <MudText>Skipped rows: <b>@_preview.SkippedRows</b></MudText>
+                </div>
+                @if (_preview.Warnings.Count > 0)
+                {
+                    <MudExpansionPanels Class="mt-3">
+                        <MudExpansionPanel Text="@($"{_preview.Warnings.Count} warnings")">
+                            @foreach (var warning in _preview.Warnings.Take(50))
+                            {
+                                <MudText Typo="Typo.body2">@warning</MudText>
+                            }
+                        </MudExpansionPanel>
+                    </MudExpansionPanels>
+                }
+            </MudPaper>
+        </MudItem>
+    }
+</MudGrid>
+
+@code {
+    private bool _loadingReference;
+    private bool _referenceLoaded;
+    private string _profileName = "Strom";
+    private StagedImport? _preview;
+
+    protected override async Task OnInitializedAsync() =>
+        _referenceLoaded = await ReferenceImporter.IsLoadedAsync();
+
+    private async Task LoadReferenceAsync()
+    {
+        _loadingReference = true;
+        try
+        {
+            var dir = Path.Combine(AppContext.BaseDirectory, "sampledata");
+            await ReferenceImporter.LoadAsync(dir);
+            _referenceLoaded = true;
+            Snackbar.Add("Reference data loaded.", Severity.Success);
+        }
+        catch (Exception ex)
+        {
+            Snackbar.Add($"Import failed: {ex.Message}", Severity.Error);
+        }
+        finally
+        {
+            _loadingReference = false;
+        }
+    }
+
+    private async Task PreviewAsync(InputFileChangeEventArgs args)
+    {
+        var file = args.File;
+        if (file is null)
+        {
+            return;
+        }
+
+        var profile = SelectedProfile();
+        using var reader = new StreamReader(file.OpenReadStream(maxAllowedSize: 5 * 1024 * 1024));
+        var content = await reader.ReadToEndAsync();
+        using var stringReader = new StringReader(content);
+        _preview = CsvImporter.Stage(profile, stringReader);
+    }
+
+    private MappingProfile SelectedProfile() => _profileName switch
+    {
+        "Wasser" => ReferenceProfiles.Water(),
+        "Heizöl" => ReferenceProfiles.HeatingOil(),
+        "Kosten" => ReferenceProfiles.Costs(),
+        _ => ReferenceProfiles.Electricity(),
+    };
+}