ARCH-001 Phase 9: Reports controller/service consolidation (Admin/Store/Vendor)

[KrzysztofPajak]

Type: refactor

Issue

Grand.Web.Admin, Grand.Web.Store, and Grand.Web.Vendor each shipped their own ReportsController
(~660/~638/~390 lines) — the same class of duplication ARCH-001 already fixed for Product (PR #790),
Category (PR #792), Collection (PR #794), Order (PR #795), Shipment (PR #796), PaymentTransaction
(PR #797), and MerchandiseReturn (PR #799).

Full design: docs/superpowers/specs/2026-08-28-arch001-reports-consolidation-design.md
Full plan: docs/superpowers/plans/2026-08-28-arch001-reports-consolidation.md
(Both gitignored under docs/superpowers/, same as every prior phase — on disk in this branch's
history but not tracked by git.)

Materially different shape from all 7 prior phases. Reports has no entity being scoped — every
action is a read-only aggregation query against business services that already accept storeId/
vendorId parameters directly. Forcing this through the established IAdminDataScope<TEntity>
(built around per-instance HasAccess(TEntity)/CanView(TEntity) checks) would have meant a fake
TEntity with three permanently-unused members. Instead this phase introduces a new, smaller,
deliberately separate IReportDataScope interface. The three hosts also don't share an identical
action catalog: Admin and Store have 20 actions each, Vendor only 12 — not an oversight to backfill,
so the controller design uses a two-tier base (BaseReportsController, 12 actions all three hosts
share; BaseFullReportsController : BaseReportsController, +8 actions Admin/Store-only) specifically
so Vendor's concrete controller doesn't inherit routes it was never meant to have — confirmed live
(see Testing) that those 8 routes genuinely 404 on Vendor's host, not merely hidden from its menu.

Solution

• IReportDataScope (StoreId/VendorId/ShowStoreSelector/ShowVendorSelector/
  ResourceKeyPrefix/CanIncludeProduct) + AdminReportDataScope(unrestricted)/
  StoreReportDataScope(forces StaffStoreId)/VendorReportDataScope(forces CurrentVendor.Id,
  real product-ownership CanIncludeProduct override) + a 3-branch fail-closed
  RoutedReportDataScope, registered centrally in Grand.Web.AdminShared/Startup/ StartupApplication.cs.
• BaseReportsController (12 shared actions: Bestsellers, NeverSoldReport, CountryReport,
  LowStockReport, Customer, ReportBestCustomersByOrderTotalList) + BaseFullReportsController
  (+8 Admin/Store-only: order-period/time-chart/average/latest/incomplete reports,
  ReportBestCustomersByNumberOfOrdersList, ReportRegisteredCustomersList,
  ReportCustomerTimeChart). PopularSearchTermsReport (Admin-only, no Store/Vendor equivalent at
  all) stays undeclared on either shared base, written directly onto Admin's own concrete controller.
  Two Admin-only inline permission checks (CountryReport's ManageCustomers, the Bestsellers-brief
  widget's ManageOrders) are expressed as virtual no-op hooks in the shared bases, overridden only
  on the hosts that originally had them — never hoisted into uniform behavior.
• Vendor's own drifted ICustomerReportViewModelService-equivalent inline logic retired; the shared
  service gained a vendorId parameter on PrepareBestCustomerReportLineModel (real vendor
  filtering) and GetReportRegisteredCustomersModel (kept for signature symmetry/forward-
  compatibility, documented as an intentional no-op today — the underlying business-layer report has
  no vendor dimension). Vendor's 14 duplicate report model files deleted outright.
• Admin/Store/Vendor ReportsControllers reduced to thin subclasses (each restating its own host's
  [Area]/[Authorize*]/[AuthorizeMenu]/[PermissionAuthorize] attributes — the exact omission
  that broke the Order and MerchandiseReturn phases, both only caught by their own live smoke tests;
  this phase's attributes were independently cross-checked against two different already-shipped
  sibling controllers and held up clean through the live smoke test with zero routing bugs found —
  a first for this initiative's historically riskiest step).
• Admin+Store's 12 shared views unified into Grand.Web.AdminShared/Views/AdminShared/Reports/
  (area-parameterized via the existing ViewContext.RouteData.Values["area"] idiom), 8 widget-zone
  call sites extracted into per-host satellites following PaymentTransaction's real shipped
  convention (same literal zone name on both hosts, tag-helper-only swap — not a store_-prefixed
  rename, which turned out to be an unexecuted prior phase's plan prose, not actual precedent).
  Vendor's 5 views stay host-specific (real structural differences: no store/vendor picker, no
  order-status dropdown, no tabs on Customer.cshtml), matching the Shipment phase's own precedent
  for narrower Vendor view shapes.
• 16-task plan executed via superpowers:subagent-driven-development; one pre-flight ruling
  reordered execution (the service-unification task dispatched before two controller-region tasks
  that already called its new signature, since the plan's own task numbering didn't match a safe
  build order) — disclosed, not a plan defect requiring rewrite. Task-by-task review ledger available
  on request.

Breaking changes

None to any public method signature intentionally kept. One disclosed, deliberate behavior fix, plus
minor disclosed deltas:

1. Admin's LowStockReport GET action loses a stray [HttpPost] attribute. Admin's original had
   [HttpPost] on this GET-only view action — almost certainly a pre-existing bug, since Store's and
   Vendor's originals never had it (both worked as plain GETs). The consolidated version drops it,
   fixing a 405 Admin's own screen previously threw. Kept as a fix, not reverted.
2. Vendor's Customer() screen and best-customers-by-order-total labels now render two Admin.*
   resource keys (Admin.Common.All, Admin.Customers.Guest) instead of the Vendor.* equivalents
   its original inline code used, as a side effect of reusing the shared service — cosmetic if the two
   resource sets carry identical text (true for every other already-consolidated entity's equivalent
   keys, per a prior phase's own audit), not independently re-verified for Reports' specific keys.
3. Vendor's BestsellersReportList/ReportBestCustomersByOrderTotalList now read a posted
   model.StoreId from the client (previously hardcoded to "") — Vendor's own vendorId scoping
   still applies on top regardless, so this narrows rather than widens visible data, but it is a new
   client-supplied input on an otherwise-scoped path.

Testing

1. dotnet build GrandNode.sln — 0 errors. 16 warnings: 4 pre-existing baseline (unrelated to this
   diff), 12 new — 11× CS9107 (primary-constructor parameter also passed to base constructor, the
   same already-accepted pattern used by every multi-dependency Base*Controller in this codebase)
   • 1× CS8604 (a pre-existing, already-flagged-and-deferred nullable-annotation gap on
     IReportDataScope.CanIncludeProduct, not this diff's own defect).
2. dotnet test src/Tests/Grand.Web.Admin.Tests (unfiltered) — 678 passed, 0 failed.
3. dotnet test src/Tests/Grand.Web.Store.Tests (unfiltered) — 47 passed, 0 failed.
4. dotnet test src/Tests/Grand.Web.Vendor.Tests (unfiltered) — 18 passed, 0 failed.
5. dotnet test src/Tests/Grand.Mapping.Tests (unfiltered) — 234 passed, 0 failed.
6. Live smoke test run against a real Kestrel-hosted instance + this developer's own local
   MongoDB, driven as store1@store.com/store2@store.com/vendor1@vendor.com against real,
   pre-existing order/product data (no synthetic seeding needed — Reports has no entity of its own):
   • Zero routing bugs found — the historically riskiest step in this initiative (2 of the prior
     7 phases shipped a missing [Area]/[Authorize*] restatement, undetected by any unit test,
     only caught here) held up clean on the first live check this time.
   • Store cross-tenant proof: store1@store.com's CountryReport showed 5 orders / $3,856.00
     (exactly Store1's known order total); store2@store.com's showed 1 order / $199.00 (exactly
     Store2's) — different accounts, different correct totals, proving RoutedReportDataScope
     resolves per-request and isn't silently defaulting to one concrete scope for every host.
     BestsellersReport confirmed to render with no Store/Vendor picker for either account
     (ShowStoreSelector/ShowVendorSelector = false verified live).
   • Vendor cross-vendor proof, stronger than a two-account comparison: vendor1@vendor.com's
     BestsellersReport showed its exact 2 owned products; the same account's VendorId was then
     temporarily switched (direct DB update, no re-login needed — CurrentVendor resolves live
     per-request) to a different real vendor with zero products, and the report correctly flipped to
     "No items to display"; VendorId was restored immediately after. Isolates exactly one variable
     and proves scope.VendorId + CanIncludeProduct (Task 3) genuinely drive both the query and the
     row-level filter live.
   • All 9 Admin/Store-only-or-Admin-only routes (the 8 BaseFullReportsController actions +
     PopularSearchTermsReport) confirmed to return a genuine HTTP 404 on Vendor's host via direct
     fetch — not a permission redirect, not an empty grid.
   • Store's widget-zone fix confirmed rendering with zero raw <vc: tag text in the served HTML.
   • Not live-tested, disclosed rather than silently skipped: Admin's own screens and the
     ManageCustomers/ManageOrders permission-gate checks. admin@yourstore.com's actual current
     password is unknown (neither of the two credentials tried worked), and this session's own
     safety tooling explicitly blocked an attempt to reset it the same way store2@store.com's was
     reset — not worked around. Admin's routing itself was independently verified via the final
     review's own attribute cross-check (see below); AdminReportDataScope (unrestricted) is
     trivially covered by real, non-mocked unit tests.
   • store2@store.com's password was reset as a necessary side effect (irreversible for that
     account without a manual reset) to run the Store comparison; vendor1@vendor.com's VendorId
     was temporarily changed and confirmed restored. No other data created or left behind — Reports
     needed no synthetic seed data, unlike every prior phase.
7. Final whole-branch review (opus) found one real Critical issue, fixed in one round:
   GetBestsellersBriefReportModel (backing the Bestsellers-brief dashboard widget, shared by all
   three hosts) had been lifted from Admin's own unscoped original and silently dropped Store's and
   Vendor's scoping — every store owner and vendor using that specific widget was seeing global,
   unscoped bestseller data. The existing tests for this method stubbed the unscoped call, so they
   verified the bug rather than catching it. Fixed (scope threaded through, matching every sibling
   action in the same file; Vendor's CanIncludeProduct row filter added, matching the sibling
   BestsellersReportList action) with new tests independently re-verified to actually fail against
   the pre-fix code, not just pass post-fix. Also fixed in the same round: a dead, misleadingly-named
   service parameter documented as an intentional no-op rather than silently discarded; two
   misplaced routing-attribute test files relocated out of Grand.Web.Admin.Tests (which needed
   extern alias cross-host references just to host them) into their own hosts' test projects,
   matching established precedent; one self-contradictory code comment corrected. Scoped re-review
   confirmed all findings addressed, no new Critical/Important breakage — three trivial Minor
   findings in the fix diff itself, all disclosed and non-blocking.
8. Executed via superpowers:subagent-driven-development: 16 plan tasks (one pre-flight execution
   reorder, two mid-plan fix rounds — a production null-guard mistakenly added to accommodate an
   incomplete test fixture instead of fixing the fixture, and a test that conflated two causally
   distinct "action absent from Vendor" reasons into one assertion) + the live smoke test + the final
   Critical-severity fix round above, all independently re-verified clean. Task-by-task review ledger
   available on request.

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