Sharepoint-Toolbox/.planning/phases/07-user-access-audit/07-04-SUMMARY.md

phase, plan, subsystem, tags, requires, provides, affects, tech-stack, key-files, key-decisions, patterns-established, requirements-completed, duration, completed

phase	plan	subsystem	tags	requires	provides	affects	tech-stack	key-files	key-decisions	patterns-established	requirements-completed	duration	completed
07-user-access-audit	04	viewmodel	viewmodel wpf people-picker debounce collectionview grouping filtering export mvvm	phase provides 07-01 UserAccessEntry AccessType IUserAccessAuditService IGraphUserSearchService GraphUserResult phase provides 07-02 UserAccessAuditService phase provides 07-03 GraphUserSearchService phase provides 07-06 UserAccessCsvExportService UserAccessHtmlExportService	UserAccessAuditViewModel with full orchestration of people picker, site selection, audit execution, grouping, filtering, summary banner, export	07-05 07-07 07-08	added patterns CollectionViewSource grouping toggle debounced CancellationTokenSource search FeatureViewModelBase extension dual-constructor pattern _hasLocalSiteOverride site override	created modified SharepointToolbox/ViewModels/Tabs/UserAccessAuditViewModel.cs	CollectionViewSource is created over Results in constructor; ApplyGrouping() clears and re-adds PropertyGroupDescription on IsGroupByUser toggle (UserLogin or SiteUrl) Debounced search uses _searchCts CancellationTokenSource cancelled on each SearchQuery change; Task.Delay(300, ct) pattern with OperationCanceledException swallowed OnResultsChanged partial rebuilds grouping/filter when Results collection reference is replaced after RunOperationAsync ExportCsvAsync calls WriteSingleFileAsync (combined single-file export) rather than WriteAsync (per-user directory) to match SaveFileDialog single-path UX	UserAccessAuditViewModel: same _hasLocalSiteOverride + OnGlobalSitesChanged guard as PermissionsViewModel Dual constructor: full DI constructor + internal test constructor omitting export services — both initialize all commands and wire collection events Summary properties (TotalAccessCount, SitesCount, HighPrivilegeCount) are computed getters calling Results LINQ — NotifySummaryProperties() triggers all three	UACC-01 UACC-02	2min	2026-04-07

Phase 7 Plan 04: UserAccessAuditViewModel Summary

UserAccessAuditViewModel wires people-picker (300ms debounced Graph search), multi-site selection with override guard, IUserAccessAuditService.AuditUsersAsync execution, CollectionViewSource group-by-user/site toggle with real-time filter, computed summary banner (TotalAccessCount, SitesCount, HighPrivilegeCount), and CSV/HTML export commands — zero-error build.

Performance

• Duration: ~2 min
• Started: 2026-04-07T10:42:51Z
• Completed: 2026-04-07T10:44:56Z
• Tasks: 1
• Files modified: 1

Accomplishments

• UserAccessAuditViewModel.cs (~300 lines) extends FeatureViewModelBase and implements all 10 observable properties, 5 commands, CollectionViewSource grouping/filtering, and dual constructors
• Debounced people-picker: _searchCts cancelled/recreated on SearchQuery change, 300ms Task.Delay, IsSearching spinner, 2-char minimum guard consistent with GraphUserSearchService
• CollectionViewSource grouping: ApplyGrouping() swaps PropertyGroupDescription between UserLogin and SiteUrl; FilterPredicate applies to 6 fields case-insensitively
• Summary banner computed properties (TotalAccessCount, SitesCount, HighPrivilegeCount) notified via NotifySummaryProperties() after each RunOperationAsync and tenant switch

Task Commits

1. Task 1: Implement UserAccessAuditViewModel - 3de737a (feat)

Plan metadata: (docs commit pending)

Files Created/Modified

• SharepointToolbox/ViewModels/Tabs/UserAccessAuditViewModel.cs — Full orchestration ViewModel for User Access Audit tab

Decisions Made

1. CollectionViewSource bound at construction — ResultsView is created from a new CollectionViewSource { Source = Results } in the constructor. When Results is replaced by a new collection in RunOperationAsync, OnResultsChanged re-applies grouping and filter. This avoids ICollectionView rebinding complexity in XAML.

2. WriteSingleFileAsync for CSV export — UserAccessCsvExportService has two modes: WriteAsync (per-user files to directory) and WriteSingleFileAsync (combined). The ViewModel uses WriteSingleFileAsync since the SaveFileDialog returns a single file path — the per-directory mode is for batch export scenarios.

3. SelectedUsers UPNs as login keys — AuditUsersAsync receives SelectedUsers.Select(u => u.UserPrincipalName) as the targetUserLogins parameter, matching the UPN-based bidirectional matching in UserAccessAuditService.

Deviations from Plan

None — plan executed exactly as written.

Issues Encountered

None.

User Setup Required

None - no external service configuration required.

Next Phase Readiness

• UserAccessAuditViewModel ready for XAML binding in 07-05 (View)
• All observable properties, commands, and ResultsView ICollectionView available for DataGrid/ComboBox/AutoComplete binding
• Export commands wired to UserAccessCsvExportService.WriteSingleFileAsync and UserAccessHtmlExportService.WriteAsync

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Phase: 07-user-access-audit Completed: 2026-04-07