AI Implementation feature(903): Admin Area Challenges: List, Import/Export and Add/Edit Modal 1.03 (#44)

This commit was merged in pull request #44.
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2026-07-22 22:18:10 +00:00
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---
type: architecture
title: Key Files Index
description: One-line responsibility for important source and contract-test files, including strict event-window validation and the public bootstrap SSE listener.
tags: [architecture, key-files, event-window, validation, default-challenge-ip, sse, bootstrap, migrations]
timestamp: 2026-07-22T19:18:00Z
description: One-line responsibility for important source and contract-test files, including strict event-window validation, the public bootstrap SSE listener, and the challenges full-replace import flow.
tags: [architecture, key-files, event-window, validation, default-challenge-ip, sse, bootstrap, migrations, challenges, import]
timestamp: 2026-07-22T22:17:11Z
---
# Backend
@@ -30,6 +30,7 @@ timestamp: 2026-07-22T19:18:00Z
| `backend/src/modules/admin/dto/general.dto.ts` | Zod contract for `PUT /api/v1/admin/general/settings`; both event timestamps are required ISO-8601 values and end must be strictly after start. |
| `tests/backend/admin-general-event-window.spec.ts` | Focused contract tests for valid, empty, malformed, equal, and reversed event-window timestamps. |
| `tests/backend/admin-general-service.spec.ts` | General-settings schema and service tests, including per-field empty datetime failures and settings-event emission. |
| `tests/backend/admin-challenges-import-replace.spec.ts` | Contract tests for the confirmed-import full-replace: wipes unrelated pre-existing challenges, unlinks wiped disk files, empty archive, unknown-category skip-then-wipe. |
# Frontend
@@ -63,6 +64,7 @@ timestamp: 2026-07-22T19:18:00Z
| `tests/frontend/admin-categories-form-modal.spec.ts` | Tests the pure `syncCategoryForm` helper that drives the edit/create prefill in `CategoryFormModalComponent`: system-row abbreviation lock, user-row unlock, re-population on second invocation, clearing on create, and iconPreview passthrough. |
| `tests/frontend/authenticated-event-source.spec.ts` | Tests SSE authorization, frame transport behavior, and the `401`/`403` unauthorized path. |
| `tests/frontend/auth-session-events.spec.ts` | Pure tests for cross-tab invalidation message encoding, payload validation, and `storage`-event filtering. |
| `tests/frontend/admin-challenges-import-autoclose.spec.ts` | Pure helpers (`summarizeImportResult`, `importErrorMessage`) and modal auto-close branch for the confirmed-import handler. |
# See also
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---
type: guide
title: Admin — Challenges Full-Replace Import
description: How the confirmed challenges import wipes every existing challenge (with cascading files/solves and disk unlink) and inserts the archive contents in one transaction.
tags: [guide, admin, challenges, import, full-replace, tester]
timestamp: 2026-07-22T22:17:11Z
---
# What it is
The **confirmed challenges import** is the second step of the import flow
on `/admin/challenges` (after the preview). When the admin clicks
**Overwrite & Import** the client POSTs the already-validated archive to
`POST /api/v1/admin/challenges/import?confirm=overwrite`. The server
performs a **full replace** of the challenge set inside one DB
transaction, then best-effort unlinks the disk files owned by the
wiped challenges.
# When to use it
Use this when an admin wants to restore the platform challenge set to
the exact contents of a previously exported JSON archive. The user
guide for the surrounding flow lives at [Admin —
Challenges](/guides/admin-challenges.md); this concept focuses on the
import-specific behavior and its consequences.
# Behavior contract
| Phase | What happens |
|-------|--------------|
| Pre-flight | The client already validated the archive against the `IMPORT_VALIDATION_FAILED` Zod schema in [Admin Challenges DTOs](/api/admin.md#challenges). The server re-validates; preview counts (`total`, `conflicts`, `unknownCategories`, `warnings`) are surfaced by the import modal. |
| Staging | Every `dataBase64` file in the archive is decoded and staged to disk via `ChallengeFilesService.stage(...)`. If any stage fails the server rolls back every previously staged file and re-throws (mirrors the existing `rollbackStaged` safety net). |
| Transaction (DB) | The server begins a single TypeORM transaction. It loads every existing challenge, captures the disk-bound `stored_filename`s of every existing `ChallengeFile`, then `DELETE`s all existing `ChallengeEntity` rows by id. `ChallengeFileEntity` and `SolveEntity` cascade-delete via FK, so dependent rows disappear too. The archive's challenges are then inserted under their original names. |
| Post-commit (FS) | For every captured `storedFilename` the server calls `ChallengeFilesService.removeFinal(storedFilename)` (best-effort; failures are logged but do not abort). Each staged file for the imported set is committed to its final filename. |
| Response | Returns `{ imported, skipped, warnings }`. Known unknown `categorySystemKey`s are reported in `skipped[]` (still wipe everything else). |
# Side effects to expect as a tester
- **Every existing challenge disappears** from the list immediately
after the success banner — including rows whose names did not appear
in the archive. Use the Players page to confirm that pre-existing
`solve` rows for wiped challenges also vanish (they cascade).
- **Uploaded challenge files** owned by wiped rows are removed from
`./data/uploads/challenges/` post-commit. The imported archive's
files appear under the same directory using their original
filenames encoded onto the wipe.
- An empty archive (`{ challenges: [] }`) is valid and produces
`imported: 0`, an empty list, and zero on-disk challenge files.
- The **import modal auto-closes on success**; the page-level status
banner (`[data-testid="challenges-status"]`) shows the
imported/skipped/warning summary. Failures keep the modal open and
show the error inline.
# Idempotency
- Re-importing the same archive twice yields the same final DB state.
- The previous upsert-on-name semantics are gone: even challenges
whose names did not appear in the archive are removed.
# Error codes
See [Admin Endpoints](/api/admin.md) and the [Admin —
Challenges](/guides/admin-challenges.md) guide:
- `IMPORT_VALIDATION_FAILED` (400) — schema failure on preview or
confirm.
- `IMPORT_PARTIAL_FAILURE` is no longer emitted: the response is
always 200 with `{ imported, skipped, warnings }` (consistent with
partial success being the normal case when unknown categories are
present).
- Any DB transaction failure rolls back every staged file and
re-throws the original error, leaving the DB untouched.
# Wiring
| Concern | File |
|---------|------|
| Endpoint | `backend/src/modules/admin/admin-challenges.controller.ts` (`POST /api/v1/admin/challenges/import?confirm=overwrite`). |
| Orchestration | `backend/src/modules/admin/challenges.service.ts` (`importConfirmed`) — full-replace transaction + post-commit unlink. |
| File staging and disk ops | `backend/src/modules/admin/challenge-files.service.ts` (`stage`, `commit`, `removeFinal`). |
| Schema | `backend/src/modules/admin/dto/challenges.dto.ts` (`CHALLENGE_FORMAT`, `CHALLENGE_FORMAT_VERSION`, import document schema). |
| Client UI | `frontend/src/app/features/admin/challenges/challenges.component.ts` (`onImportConfirm`) — refreshes list, sets status, calls `closeImport()`. |
| Pure helpers | `frontend/src/app/features/admin/challenges/challenges.pure.ts` (`summarizeImportResult`, `importErrorMessage`). |
| Backend contract tests | `tests/backend/admin-challenges-import-replace.spec.ts` — full-replace, disk-file unlink, empty archive, unknown-category wipe. |
| Frontend contract tests | `tests/frontend/admin-challenges-import-autoclose.spec.ts` — pure helpers + modal auto-close branch. |
# Notes
- The flag is not in the archive's per-challenge `data`; only admins
can read the plaintext, and the export/import preserves the same
restriction.
- Wiping cascades remove `solve` rows for wiped challenges — the
scoreboard will recompute on the next render without those entries.
- The destroy-then-insert happens in one transaction, so a partial
failure cannot leave the platform with a mix of old and new rows.
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@@ -3,7 +3,7 @@ type: guide
title: Admin — Challenges
description: How an admin lists, searches, creates, edits, deletes, imports, and exports challenges from the /admin/challenges page.
tags: [guide, admin, challenges, import, export, files, tester]
timestamp: 2026-07-22T21:25:29Z
timestamp: 2026-07-22T22:17:11Z
---
# When this view is available
@@ -104,8 +104,10 @@ The form modal has three sections (tabs): General, Connection, Files. Fields mar
1. Click **Import challenges** → a file picker accepts `.json`. The client reads it and posts it to `POST /api/v1/admin/challenges/import`.
2. On validation success the import modal opens with the preview (`total`, `conflicts`, `unknownCategories`, `warnings`) and the standard copy: *"Import N challenges. Existing challenges with matching names will be overwritten. New categories referenced but missing locally will be skipped with a warning. Continue?"*
3. Click **Overwrite & Import** → the client posts the same document with `?confirm=overwrite`. The server stages every file up front (rolling back any FS failure), then upserts challenges inside one transaction by case-insensitive name.
4. The response renders imported/skipped/warning counts; the list refreshes automatically.
3. Click **Overwrite & Import** → the client posts the same document with `?confirm=overwrite`. The server stages every file up front (rolling back any FS failure), then **wipes every existing challenge (cascade-deleting their `challenge_file` and `solve` rows and best-effort unlinking their disk files) and inserts the archive's challenges** inside one transaction.
4. The modal auto-closes on success and the list refreshes automatically; the page-level status banner shows imported/skipped/warning counts.
See [Admin — Challenges Full-Replace Import](/guides/admin-challenges-import.md) for the full transactional semantics, side effects, and the auto-close contract.
# Validation & error codes (server)
@@ -127,7 +129,7 @@ The form modal has three sections (tabs): General, Connection, Files. Fields mar
| 3 | `frontend/src/app/core/services/admin.service.ts` | Typed `listChallenges`, `getChallengeDetail`, `createChallenge`, `updateChallenge`, `deleteChallenge`, `exportChallenges`, `previewChallengeImport`, `confirmChallengeImport`, `stageChallengeFile`, `discardChallengeFile`. |
| 4 | `frontend/src/app/features/admin/challenges/challenge-form.pure.ts` | Defaults/prefill, points/port validation, first-invalid-tab selection, file-size partitioning, payload mapping. |
| 5 | `backend/src/modules/admin/admin-challenges.controller.ts` | `AdminGuard` + `@Roles('admin')` on every handler. |
| 6 | `backend/src/modules/admin/challenges.service.ts` | CRUD, list aggregates, transactional deletion, export, import orchestration. |
| 6 | `backend/src/modules/admin/challenges.service.ts` | CRUD, list aggregates, transactional deletion, export, full-replace import orchestration. |
| 7 | `backend/src/modules/admin/challenge-files.service.ts` | Staging, commit, discard, read for export, limits. |
| 8 | `backend/src/modules/admin/dto/challenges.dto.ts` | Zod schemas for IDs, list query, create/update, staged-file manifest, import document with field paths. |
@@ -136,4 +138,4 @@ The form modal has three sections (tabs): General, Connection, Files. Fields mar
* The flag is never present in any non-admin DTO. The player-facing challenges route and scoreboard remain unchanged; only admin endpoints can fetch the plaintext.
* All mutating endpoints require the standard CSRF cookie + header pair; the existing `csrfInterceptor` handles the headers automatically.
* The list query enforces a deterministic `LOWER(name), name` order so the UI sort is reproducible.
* Importing the same document twice is idempotent: every incoming challenge either replaces an existing row by lowercased name or inserts a new one.
* Importing the same document twice is idempotent: every existing challenge (matching or not) is replaced by the archive contents.
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@@ -11,7 +11,7 @@ scoreboard, an event window with a public countdown, theming, and admin
controls.
The docs below are organized by purpose so agents can pull just the slice
they need. Last regenerated 2026-07-22T21:25:29Z.
they need. Last regenerated 2026-07-22T22:17:11Z.
# Architecture
@@ -74,6 +74,9 @@ they need. Last regenerated 2026-07-22T21:25:29Z.
* [Admin — Challenges](/guides/admin-challenges.md) - How an admin lists,
searches, creates, edits, deletes, imports, and exports challenges at
`/admin/challenges`, including file staging and overwrite confirm.
* [Admin — Challenges Full-Replace Import](/guides/admin-challenges-import.md) -
Transactional full-replace semantics, side effects, and the auto-close
contract of the confirmed challenges import on `/admin/challenges`.
* [Authenticated Shell](/guides/authenticated-shell.md) - The header, LED
+ countdown, quick-jump tabs, user menu, and SSE lifecycle that frame
every signed-in page.