Sharepoint-Toolbox/.planning/phases/15-consolidation-data-model/15-01-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
15-consolidation-data-model	01	api	csharp records linq permission-consolidation		LocationInfo record with five location fields (SiteUrl, SiteTitle, ObjectTitle, ObjectUrl, ObjectType) ConsolidatedPermissionEntry record grouping key fields with IReadOnlyList<LocationInfo> Locations PermissionConsolidator.Consolidate — pure static method merging UserAccessEntry list by composite key PermissionConsolidator.MakeKey — pipe-delimited case-insensitive key from UserLogin+PermissionLevel+AccessType+GrantedThrough	16-report-consolidation-toggle	added patterns Positional C# records for immutable data shapes LINQ GroupBy+Select for pure-function merge without mutable state Internal MakeKey for composite key generation (pipe-delimited, ToLowerInvariant) Array.Empty<T>() short-circuit on empty input	created modified SharepointToolbox/Core/Models/LocationInfo.cs SharepointToolbox/Core/Models/ConsolidatedPermissionEntry.cs SharepointToolbox/Core/Helpers/PermissionConsolidator.cs	MakeKey is internal (not private) to allow test access via InternalsVisibleTo without exposing as public API LINQ GroupBy+Select chosen over mutable Dictionary to match existing codebase functional style OrderBy UserLogin then PermissionLevel ensures deterministic output order for consistent exports	Consolidation key: pipe-delimited lowercase composite of UserLogin|PermissionLevel|AccessType|GrantedThrough LocationInfo is the extraction unit — one per original UserAccessEntry row in a consolidated group	RPT-04	1min	2026-04-09

Phase 15 Plan 01: Consolidation Data Model Summary

LocationInfo + ConsolidatedPermissionEntry records and PermissionConsolidator.Consolidate pure-function merge service using LINQ GroupBy over pipe-delimited composite key

Performance

• Duration: ~1 min
• Started: 2026-04-09T09:40:40Z
• Completed: 2026-04-09T09:41:37Z
• Tasks: 2
• Files modified: 3

Accomplishments

• LocationInfo positional record extracts five location fields from UserAccessEntry during consolidation
• ConsolidatedPermissionEntry record holds key fields plus computed LocationCount convenience property
• PermissionConsolidator.Consolidate groups a flat UserAccessEntry list by (UserLogin, PermissionLevel, AccessType, GrantedThrough) composite key, returning deterministically ordered consolidated rows
• Empty input short-circuits cleanly to Array.Empty without allocating

Task Commits

Each task was committed atomically:

1. Task 1: Create LocationInfo and ConsolidatedPermissionEntry model records - 270329b (feat)
2. Task 2: Create PermissionConsolidator static helper - 440b247 (feat)

Files Created/Modified

• SharepointToolbox/Core/Models/LocationInfo.cs - Lightweight record holding five location fields extracted from UserAccessEntry when rows are merged
• SharepointToolbox/Core/Models/ConsolidatedPermissionEntry.cs - Consolidated permission record with key fields, Locations list, and computed LocationCount property
• SharepointToolbox/Core/Helpers/PermissionConsolidator.cs - Static helper with MakeKey (internal) and Consolidate (public) for pure-function merge logic

Decisions Made

• MakeKey declared internal (not private) so test projects can access it via [InternalsVisibleTo] without exposing as public API surface
• LINQ GroupBy+Select pattern used instead of mutable dictionary — consistent with functional style seen elsewhere in the codebase
• Output ordered by UserLogin then PermissionLevel for deterministic, predictable export row ordering

Deviations from Plan

None - plan executed exactly as written.

Issues Encountered

None.

User Setup Required

None - no external service configuration required.

Next Phase Readiness

• Phase 16 (Report Consolidation Toggle) can now wire PermissionConsolidator.Consolidate into the export pipeline
• All three files exist, compile without errors, and no existing files were modified
• MakeKey is accessible to Phase 16 test projects via InternalsVisibleTo if needed

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Phase: 15-consolidation-data-model Completed: 2026-04-09