---
phase: 18-auto-take-ownership
plan: "01"
subsystem: settings, models, services
tags: [auto-take-ownership, settings, permission-entry, elevation-service, di]
dependency_graph:
  requires: []
  provides: [AppSettings.AutoTakeOwnership, PermissionEntry.WasAutoElevated, IOwnershipElevationService, OwnershipElevationService, SettingsViewModel.AutoTakeOwnership]
  affects: [SharepointToolbox/Core/Models/AppSettings.cs, SharepointToolbox/Core/Models/PermissionEntry.cs, SharepointToolbox/Services/SettingsService.cs, SharepointToolbox/ViewModels/Tabs/SettingsViewModel.cs, SharepointToolbox/Views/Tabs/SettingsView.xaml]
tech_stack:
  added: [IOwnershipElevationService, OwnershipElevationService, Microsoft.Online.SharePoint.TenantAdministration.Tenant.SetSiteAdmin]
  patterns: [fire-and-forget property setter pattern (matching DataFolder), DI transient registration]
key_files:
  created:
    - SharepointToolbox/Services/IOwnershipElevationService.cs
    - SharepointToolbox/Services/OwnershipElevationService.cs
    - SharepointToolbox.Tests/Services/OwnershipElevationServiceTests.cs
    - SharepointToolbox.Tests/ViewModels/SettingsViewModelOwnershipTests.cs
  modified:
    - SharepointToolbox/Core/Models/AppSettings.cs
    - SharepointToolbox/Core/Models/PermissionEntry.cs
    - SharepointToolbox/Services/SettingsService.cs
    - SharepointToolbox/ViewModels/Tabs/SettingsViewModel.cs
    - SharepointToolbox/Views/Tabs/SettingsView.xaml
    - SharepointToolbox/Localization/Strings.resx
    - SharepointToolbox/Localization/Strings.fr.resx
    - SharepointToolbox/App.xaml.cs
decisions:
  - "OwnershipElevationService.ElevateAsync uses Tenant.SetSiteAdmin from PnP.Framework (Microsoft.Online.SharePoint.TenantAdministration)"
  - "WasAutoElevated placed last with default=false in PermissionEntry positional record to avoid breaking all existing callsites"
  - "AutoTakeOwnership in SettingsViewModel follows fire-and-forget pattern matching DataFolder setter"
metrics:
  duration: "~15 minutes"
  tasks_completed: 2
  files_modified: 8
  files_created: 4
  completed_date: "2026-04-09"
---

# Phase 18 Plan 01: Auto-Take Ownership Settings Foundation Summary

**One-liner:** AppSettings, PermissionEntry, IOwnershipElevationService/impl, and SettingsView checkbox for auto-take-ownership toggle backed by full EN/FR localization and 10 new tests.

## Tasks Completed

| Task | Name | Commit | Files |
|------|------|--------|-------|
| 1 | Models + SettingsService + OwnershipElevationService + tests | 36fb312 | AppSettings.cs, PermissionEntry.cs, SettingsService.cs, IOwnershipElevationService.cs, OwnershipElevationService.cs, SettingsViewModel.cs, App.xaml.cs, 2 test files |
| 2 | SettingsView XAML + localization | 20948e4 | SettingsView.xaml, Strings.resx, Strings.fr.resx |

## What Was Built

- `AppSettings.AutoTakeOwnership` bool property defaulting to `false`, round-trips through JSON.
- `PermissionEntry.WasAutoElevated` optional positional parameter (last, default `false`) — zero callsite breakage.
- `SettingsService.SetAutoTakeOwnershipAsync(bool)` persists toggle following same pattern as `SetLanguageAsync`/`SetDataFolderAsync`.
- `IOwnershipElevationService` interface with `ElevateAsync(ClientContext, siteUrl, loginName, ct)`.
- `OwnershipElevationService` wraps `Tenant.SetSiteAdmin` from PnP.Framework.
- DI registration: `services.AddTransient<IOwnershipElevationService, OwnershipElevationService>()` in App.xaml.cs.
- `SettingsViewModel.AutoTakeOwnership` property loads from settings on `LoadAsync()`, persists on set via fire-and-forget `SetAutoTakeOwnershipAsync`.
- `SettingsView.xaml` "Site Ownership" section with `CheckBox` bound to `AutoTakeOwnership`, with description `TextBlock`.
- EN/FR localization keys: `settings.ownership.title`, `settings.ownership.auto`, `settings.ownership.description`.
- 10 new tests covering all behaviors; full suite: 328 passed, 28 skipped, 0 failed.

## Decisions Made

1. `OwnershipElevationService.ElevateAsync` uses `Tenant.SetSiteAdmin` (already available via PnP.Framework `Microsoft.Online.SharePoint.TenantAdministration`).
2. `WasAutoElevated` placed last with `= false` default in the positional record — no existing callsite needed updating.
3. `AutoTakeOwnership` ViewModel setter uses `_ = _settingsService.SetAutoTakeOwnershipAsync(value)` matching the `DataFolder` fire-and-forget pattern.

## Deviations from Plan

None - plan executed exactly as written.

## Test Results

- `dotnet build SharepointToolbox.slnx` — 0 errors, 0 warnings
- `dotnet test ... --filter OwnershipElevation|SettingsViewModelOwnership` — 8/8 passed
- `dotnet test ... --filter LocaleCompleteness` — 2/2 passed
- Full suite — 328 passed, 0 failed, 28 skipped

## Self-Check: PASSED

All created files exist. All commits verified. Full test suite green.
