Sharepoint-Toolbox/.planning/phases/09-storage-visualization/09-02-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
09-storage-visualization	02	services	csom caml-query file-metrics sharepoint	phase provides 09-01 FileTypeMetric record, IStorageService.CollectFileTypeMetricsAsync signature	CollectFileTypeMetricsAsync implementation in StorageService CSOM CamlQuery-based file enumeration grouped by extension	09-03 09-04	added patterns paginated CamlQuery with RowLimit for file enumeration	created modified SharepointToolbox/Services/StorageService.cs	Added System.IO using explicitly -- WPF project implicit usings do not include System.IO for Path.GetExtension	CamlQuery pagination: RowLimit Paged=TRUE with ListItemCollectionPosition loop for batched file enumeration Extension grouping: OrdinalIgnoreCase dictionary with ToLowerInvariant normalization for consistent extension keys	VIZZ-02	1min	2026-04-07

Phase 09 Plan 02: CollectFileTypeMetricsAsync Summary

CSOM CamlQuery-based file enumeration across all non-hidden document libraries, grouped by extension with paginated 500-item batches

Performance

• Duration: 1 min
• Started: 2026-04-07T13:23:20Z
• Completed: 2026-04-07T13:24:13Z
• Tasks: 1
• Files modified: 1

Accomplishments

• Implemented CollectFileTypeMetricsAsync in StorageService resolving CS0535 interface compliance error
• CamlQuery with RecursiveAll scope and FSObjType=0 filter enumerates only files across all subfolders
• Paginated queries (500-item batches) avoid SharePoint list view threshold limits
• Extension-based grouping with case-insensitive dictionary produces sorted FileTypeMetric results

Task Commits

Each task was committed atomically:

1. Task 1: Implement CollectFileTypeMetricsAsync in StorageService - 81e3dca (feat)

Plan metadata: (pending)

Files Created/Modified

• SharepointToolbox/Services/StorageService.cs - Added CollectFileTypeMetricsAsync method and System.IO using

Decisions Made

• Added using System.IO; explicitly since WPF project implicit usings do not include it (Path.GetExtension not available without it)

Deviations from Plan

Auto-fixed Issues

1. [Rule 3 - Blocking] Added missing System.IO using directive

• Found during: Task 1 (CollectFileTypeMetricsAsync implementation)
• Issue: Path.GetExtension not recognized -- WPF implicit usings exclude System.IO
• Fix: Added using System.IO; at top of StorageService.cs
• Files modified: SharepointToolbox/Services/StorageService.cs
• Verification: Build succeeds with 0 errors
• Committed in: 81e3dca (Task 1 commit)

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Total deviations: 1 auto-fixed (1 blocking) Impact on plan: Minor using directive addition required for compilation. No scope creep.

Issues Encountered

None beyond the System.IO using directive (documented above as deviation).

User Setup Required

None - no external service configuration required.

Next Phase Readiness

• StorageService now fully implements IStorageService (both CollectStorageAsync and CollectFileTypeMetricsAsync)
• Ready for Plan 09-03 (ViewModel integration) to wire CollectFileTypeMetricsAsync into the storage visualization UI
• FileTypeMetric results sorted by TotalSizeBytes descending, ready for chart data binding

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Phase: 09-storage-visualization Completed: 2026-04-07