---
phase: 03-storage
plan: 07
subsystem: ui
tags: [wpf, mvvm, datagrid, ivalueconverter, di, storage, xaml]

# Dependency graph
requires:
  - phase: 03-storage plan 03-02
    provides: IStorageService/StorageService — storage scan engine
  - phase: 03-storage plan 03-03
    provides: StorageCsvExportService, StorageHtmlExportService
  - phase: 03-storage plan 03-06
    provides: localization keys for Storage tab UI

provides:
  - StorageViewModel: IStorageService orchestration with FlattenNode, export commands, tenant-switching
  - StorageView.xaml: DataGrid with IndentLevel-based Thickness margin for tree-indent display
  - StorageView.xaml.cs: code-behind wiring DataContext
  - IndentConverter, BytesConverter, InverseBoolConverter registered in Application.Resources
  - RightAlignStyle registered in Application.Resources
  - Storage tab wired in MainWindow via DI-resolved StorageView

affects: [03-08, phase-04-teams]

# Tech tracking
tech-stack:
  added: []
  patterns:
    - StorageViewModel uses FeatureViewModelBase + AsyncRelayCommand (same as PermissionsViewModel)
    - TenantProfile site override via new profile with site URL (ClientContext.Url is read-only)
    - IValueConverter triple registration in App.xaml: IndentConverter/BytesConverter/InverseBoolConverter
    - FlattenNode recursive helper assigns IndentLevel pre-Dispatcher.InvokeAsync

key-files:
  created:
    - SharepointToolbox/ViewModels/Tabs/StorageViewModel.cs
    - SharepointToolbox/Views/Tabs/StorageView.xaml
    - SharepointToolbox/Views/Tabs/StorageView.xaml.cs
    - SharepointToolbox/Views/Converters/IndentConverter.cs
  modified:
    - SharepointToolbox/App.xaml
    - SharepointToolbox/App.xaml.cs
    - SharepointToolbox/MainWindow.xaml
    - SharepointToolbox/MainWindow.xaml.cs
    - SharepointToolbox/Services/Export/SearchCsvExportService.cs
    - SharepointToolbox/Services/Export/SearchHtmlExportService.cs

key-decisions:
  - "ClientContext.Url is read-only in CSOM — must create new TenantProfile with site URL for GetOrCreateContextAsync (same approach as PermissionsViewModel)"
  - "IndentConverter/BytesConverter/InverseBoolConverter registered in App.xaml Application.Resources — accessible to all views without per-UserControl declaration"
  - "StorageView XAML omits local UserControl.Resources converter declarations — uses Application-level StaticResource references instead"

patterns-established:
  - "Site-scoped operations create new TenantProfile{TenantUrl=siteUrl, ClientId/Name from current profile}"
  - "FlattenNode pre-assigns IndentLevel before Dispatcher.InvokeAsync to avoid cross-thread collection mutation"

requirements-completed: [STOR-01, STOR-02, STOR-03, STOR-04, STOR-05]

# Metrics
duration: 4min
completed: 2026-04-02
---

# Phase 03 Plan 07: StorageViewModel + StorageView XAML + DI Wiring Summary

**StorageViewModel orchestrating IStorageService via FeatureViewModelBase + StorageView DataGrid with IndentConverter-based tree indentation, fully wired through DI in MainWindow**

## Performance

- **Duration:** ~4 min
- **Started:** 2026-04-02T13:35:02Z
- **Completed:** 2026-04-02T13:39:00Z
- **Tasks:** 2
- **Files modified:** 10

## Accomplishments

- StorageViewModel created with RunOperationAsync → IStorageService.CollectStorageAsync, FlattenNode tree-flattening, Dispatcher.InvokeAsync-safe ObservableCollection update
- StorageView.xaml DataGrid with IndentLevel-driven Thickness margin, BytesConverter for human-readable sizes, all scan/export controls bound to ViewModel
- IndentConverter, BytesConverter, InverseBoolConverter, and RightAlignStyle registered in App.xaml Application.Resources
- Storage tab live in MainWindow via DI-resolved StorageView (same pattern as Permissions tab)

## Task Commits

Each task was committed atomically:

1. **Task 1: Create StorageViewModel** - `e174a18` (feat)
2. **Task 2: Create StorageView XAML + code-behind, update DI and MainWindow wiring** - `e08452d` (feat)

## Files Created/Modified

- `SharepointToolbox/ViewModels/Tabs/StorageViewModel.cs` - Storage tab ViewModel (IStorageService orchestration, export commands, tenant-switching)
- `SharepointToolbox/Views/Tabs/StorageView.xaml` - Storage tab XAML (DataGrid + scan controls + export buttons)
- `SharepointToolbox/Views/Tabs/StorageView.xaml.cs` - Code-behind wiring DataContext to StorageViewModel
- `SharepointToolbox/Views/Converters/IndentConverter.cs` - IndentConverter, BytesConverter, InverseBoolConverter in one file
- `SharepointToolbox/App.xaml` - Registered three converters and RightAlignStyle in Application.Resources
- `SharepointToolbox/App.xaml.cs` - Phase 3 Storage DI registrations (IStorageService, exports, VM, View)
- `SharepointToolbox/MainWindow.xaml` - Added x:Name=StorageTabItem to Storage TabItem
- `SharepointToolbox/MainWindow.xaml.cs` - Wired StorageTabItem.Content from DI
- `SharepointToolbox/Services/Export/SearchCsvExportService.cs` - Added missing System.IO using
- `SharepointToolbox/Services/Export/SearchHtmlExportService.cs` - Added missing System.IO using

## Decisions Made

- `ClientContext.Url` is read-only in CSOM — the site URL override is done by creating a new `TenantProfile` with `TenantUrl = SiteUrl` (same ClientId/Name from current profile), passed to `GetOrCreateContextAsync`.
- All three converters (IndentConverter, BytesConverter, InverseBoolConverter) registered at Application scope in App.xaml rather than per-view, avoiding duplicate resource key definitions.
- `StorageView.xaml` omits local `UserControl.Resources` declarations for converters — references Application-level `StaticResource` instead, keeping the XAML clean.

## Deviations from Plan

### Auto-fixed Issues

**1. [Rule 1 - Bug] Fixed ClientContext.Url read-only assignment in StorageViewModel.RunOperationAsync**
- **Found during:** Task 1 (StorageViewModel creation)
- **Issue:** Plan included `ctx.Url = SiteUrl.TrimEnd('/')` but `ClientRuntimeContext.Url` is a read-only property in CSOM
- **Fix:** Created a new `TenantProfile{TenantUrl=siteUrl, ClientId, Name}` and passed it to `GetOrCreateContextAsync` — the context is keyed by URL so it gets or creates the right session
- **Files modified:** `SharepointToolbox/ViewModels/Tabs/StorageViewModel.cs`
- **Verification:** Build succeeded with 0 errors
- **Committed in:** `e174a18` (Task 1 commit)

**2. [Rule 3 - Blocking] Added missing System.IO using to SearchCsvExportService and SearchHtmlExportService**
- **Found during:** Task 1 build verification
- **Issue:** Both Search export services used `File.WriteAllTextAsync` without `using System.IO;` — same established project convention (WPF project does not include System.IO in implicit usings)
- **Fix:** Added `using System.IO;` to both files
- **Files modified:** `SharepointToolbox/Services/Export/SearchCsvExportService.cs`, `SharepointToolbox/Services/Export/SearchHtmlExportService.cs`
- **Verification:** Build succeeded with 0 errors; 82 tests pass
- **Committed in:** `e174a18` (Task 1 commit)

---

**Total deviations:** 2 auto-fixed (1 bug, 1 blocking)
**Impact on plan:** Both auto-fixes necessary for correctness. No scope creep.

## Issues Encountered

None beyond the two auto-fixed deviations above.

## User Setup Required

None - no external service configuration required.

## Next Phase Readiness

- StorageView is live and functional — users can enter site URL, configure scan options, run scan, and export results
- Plans 03-03 (StorageCsvExportService) and 03-06 (localization keys) are prerequisites and were already completed
- Ready for Wave 4: Plan 03-08 (SearchViewModel + DuplicatesViewModel + Views + visual checkpoint)
- All 82 tests passing, 10 expected skips (CSOM live-connection tests)

---
*Phase: 03-storage*
*Completed: 2026-04-02*