---
phase: 03
plan: 08
subsystem: ui-viewmodels
tags: [wpf, viewmodel, search, duplicates, di, xaml]
dependency_graph:
  requires: [03-05, 03-06, 03-07]
  provides: [SearchViewModel, DuplicatesViewModel, SearchView, DuplicatesView, Phase3-DI]
  affects: [App.xaml.cs, MainWindow.xaml, MainWindow.xaml.cs]
tech_stack:
  added: []
  patterns: [FeatureViewModelBase, AsyncRelayCommand, TenantProfile-site-override, DI-tab-wiring]
key_files:
  created:
    - SharepointToolbox/ViewModels/Tabs/SearchViewModel.cs
    - SharepointToolbox/Views/Tabs/SearchView.xaml
    - SharepointToolbox/Views/Tabs/SearchView.xaml.cs
    - SharepointToolbox/ViewModels/Tabs/DuplicatesViewModel.cs
    - SharepointToolbox/Views/Tabs/DuplicatesView.xaml
    - SharepointToolbox/Views/Tabs/DuplicatesView.xaml.cs
  modified:
    - SharepointToolbox/App.xaml.cs
    - SharepointToolbox/MainWindow.xaml
    - SharepointToolbox/MainWindow.xaml.cs
decisions:
  - SearchViewModel and DuplicatesViewModel use TenantProfile site URL override pattern — ctx.Url is read-only in CSOM (established pattern from StorageViewModel)
  - DuplicateRow flat DTO wraps DuplicateItem with GroupName and GroupSize for DataGrid display
metrics:
  duration: 4min
  completed_date: "2026-04-02"
  tasks: 3
  files: 9
---

# Phase 3 Plan 08: SearchViewModel + DuplicatesViewModel + Views + DI Wiring Summary

**One-liner:** SearchViewModel and DuplicatesViewModel with full XAML views wired into MainWindow via DI, completing Phase 3 Storage feature tabs.

## Tasks Completed

| # | Name | Commit | Files |
|---|------|--------|-------|
| 1a | SearchViewModel + SearchView | 7e6d39a | SearchViewModel.cs, SearchView.xaml, SearchView.xaml.cs |
| 1b | DuplicatesViewModel + DuplicatesView | 0984a36 | DuplicatesViewModel.cs, DuplicatesView.xaml, DuplicatesView.xaml.cs |
| 2 | DI registration + MainWindow wiring | 1f2a49d | App.xaml.cs, MainWindow.xaml, MainWindow.xaml.cs |

## What Was Built

**SearchViewModel** (`SearchViewModel.cs`): Full filter state (extensions, regex, 4 date range checkboxes, createdBy, modifiedBy, library, maxResults), `RunOperationAsync` that calls `ISearchService.SearchFilesAsync`, `ExportCsvCommand` + `ExportHtmlCommand` with CanExport guard, `OnTenantSwitched` clears results.

**SearchView.xaml**: Left filter panel (260px ScrollViewer) with GroupBox for filters, Run Search + Cancel buttons, Export CSV/HTML group, status TextBlock. Right: full-width DataGrid with 8 columns (name, ext, created, author, modified, modifiedBy, size, path) using `BytesConverter` and `RightAlignStyle`.

**DuplicatesViewModel** (`DuplicatesViewModel.cs`): Mode (Files/Folders), 5 criteria checkboxes, IncludeSubsites, Library, `RunOperationAsync` that calls `IDuplicatesService.ScanDuplicatesAsync`, flattens `DuplicateGroup.Items` to flat `DuplicateRow` list for DataGrid, `ExportHtmlCommand`.

**DuplicatesView.xaml**: Left options panel (240px) with type RadioButtons, criteria checkboxes, library TextBox, IncludeSubsites checkbox, Run Scan + Cancel + Export HTML buttons. Right: DataGrid with group, copies, name, library, size, created, modified, path columns.

**DI + Wiring**: App.xaml.cs registers all Phase 3 Search and Duplicates services and views. MainWindow.xaml replaces FeatureTabBase stubs with named TabItems. MainWindow.xaml.cs wires content from DI.

## Deviations from Plan

### Auto-fixed Issues

**1. [Rule 1 - Bug] Fixed ctx.Url read-only error in SearchViewModel**
- **Found during:** Task 1a verification build
- **Issue:** Plan code used `ctx.Url = SiteUrl.TrimEnd('/')` — `ClientRuntimeContext.Url` is read-only in CSOM (CS0200)
- **Fix:** Replaced with `new TenantProfile { TenantUrl = SiteUrl.TrimEnd('/'), ClientId = ..., Name = ... }` and passed to `GetOrCreateContextAsync` — identical to StorageViewModel pattern documented in STATE.md
- **Files modified:** SearchViewModel.cs
- **Commit:** 7e6d39a (fix applied in same commit)

**2. [Rule 1 - Bug] Pre-emptively fixed ctx.Url in DuplicatesViewModel**
- **Found during:** Task 1b (same issue pattern as Task 1a)
- **Issue:** Plan code also used `ctx.Url =` for DuplicatesViewModel
- **Fix:** Same TenantProfile override pattern applied before writing the file
- **Files modified:** DuplicatesViewModel.cs
- **Commit:** 0984a36

## Pre-existing Test Failure (Out of Scope)

`FeatureViewModelBaseTests.CancelCommand_DuringOperation_SetsStatusMessageToCancelled` fails because test asserts `.Contains("cancel")` (case-insensitive) but the app returns French string "Opération annulée". This failure predates this plan (confirmed via git stash test). Out of scope — logged to deferred items.

## Self-Check: PASSED