feat: let a gateway url name run to several path segments

[hamzahalq]

Clients can lay out their own gateway URLs, e.g. /api/gateway/logistics/slim/orders/sync.

• URL name accepts /-separated parts; the last part can't be sync/async
• Route is a catch-all under /api/gateway; lookup ignores case (older rows may have capitals)
• Slashes become dashes in the exchange file name, so handlers that write it don't create folders
• UI: / allowed in the URL-name box, lowercase /api/gateway/… everywhere, confirm before changing a gateway's URL
• UI applies the API's url-name rules as you type; what typing can't catch (empty, ending in sync/async) shows under the field and blocks saving

Single-segment gateways work as before.

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📝 Summary

Summary

• Replaces separate gateway sync and async routes with a catch-all POST route under /api/gateway. The handler lowercases and trims the path, then dispatches only when the final segment is sync or async.
• Allows lowercase, slash-separated gateway URL names. The final name segment cannot be sync or async. Gateway lookup and collision checks account for existing mixed-case names.
• Replaces / with - in exchange file names.
• Updates gateway UI paths to lowercase /api/gateway/. The edit flow asks for confirmation when a gateway URL name changes and warns that calls to the old path will return 404.

Risk

risk:medium. The catch-all route changes request routing, and URL-name changes affect partner integrations.

Security-sensitive areas

• Gateway path matching, lookup, and authorization are touched. The handler checks partner authorization and gateway membership before revealing whether an authorized gateway is inactive.
• No authentication mechanism changes are described.

Test coverage impact

• Adds integration cases for invalid and multi-segment names, plus a mixed-case collision case.
• Adds UI unit tests for URL-name normalization and cleanup.
• Test execution results are unavailable.

Deployment and operations

• No database schema migration is indicated.
• Partners must update calls when a gateway URL name changes; calls to the old path will return 404.
• Reverting the code would remove support for multi-segment names and the new route behavior. Existing data with multi-segment names may then be unreachable.

Walkthrough

Gateway URL names now support multiple lowercase path segments. The API routes sync and async requests under /api/gateway. The client normalizes and displays these paths, and prompts for confirmation before saving a changed URL name.

Changes

Gateway URL routing and management

Layer / File(s)	Summary
URL-name rules and normalization SW.Bitween.Api/Resources/ApiGateways/GatewayUrlName.cs, SW.Bitween.IntegrationTests/Tests/ApiGatewayTests.cs, SW.Bitween.Web/ClientApp/src/lib/identifiers.ts, SW.Bitween.Web/ClientApp/src/lib/__tests__/identifiers.test.ts, SW.Bitween.Web/ClientApp/src/pages/api-gateways/ApiGatewayNewPage.tsx	The API accepts slash-separated URL-name segments with per-segment separator rules and compares stored names case-insensitively. Client URL-name helpers normalize multipart names. Tests cover validation, case-insensitive conflicts, and normalization.
Gateway request routing SW.Bitween.Api/Controllers/GatewayController.cs	A catch-all POST action normalizes the path, dispatches requests ending in sync or async, and returns 404 for other paths. Gateway lookup compares names without case sensitivity. Exchange filenames replace slashes with hyphens.
Gateway path display and rename confirmation SW.Bitween.Web/ClientApp/src/pages/api-gateways/ApiGatewayPage.tsx, SW.Bitween.Web/ClientApp/src/pages/api-gateways/ApiGatewaysPage.tsx, SW.Bitween.Web/ClientApp/src/pages/api-gateways/AttachPartnerPage.tsx	Gateway paths use lowercase /api/gateway/. The gateway page asks for confirmation when a URL name changes and displays the old and proposed paths before saving.

Priority: ⬇️ Low

Estimated code review effort: 3 (Moderate) | ~25 minutes

Change: Feature

Suggested labels: security, database, risk:high

Suggested reviewers: mmalkhatib

Merge Risk: 🔵 Low · up to 19e1a

A gateway name ending in a newline can be saved even though it falls outside the intended URL-name rules. Fix the validator before merging, or accept this narrow edge case for follow-up.

Security Architecture Review

Security architecture risk: 🟡 Moderate · up to 19e1a

Partner authorization remains in place, but the new case-insensitive routing could make older gateways with names differing only by case resolve ambiguously. Renaming a gateway also requires partners to adopt its new URL. Whether affected legacy names exist is unknown.

Retained concerns

• Medium · security · inferred: Case-insensitive routing can collapse distinct legacy gateway rows into one effective address on databases that permit case-variant names. First-match selection can reject a partner previously attached to the intended gateway or send a partner attached to both through the unintended subscription.

Security review details

Security Blast Radius

• inferred — The case-variant condition is confined to gateways sharing one normalized name on a database that permits both rows. A wrong selection can affect their partner access or subscription choice; it does not remove the selected gateway's partner checks.

Security Findings and Attack Paths

• inferred — If legacy case-variant rows coexist, a caller using either address can reach first-match gateway selection before authentication. The caller must still possess a valid key and be attached to the selected gateway to submit an exchange; actual legacy collisions were not established.

Trust Boundaries and Controls

• observed — The catch-all remains under the literal /api/gateway prefix, accepts only sync or async as its final operation, and retains API-key authorization and attachment checks before submission.

Resilience and Maintainability Implications

• inferred — Exchange-ID-based core file keys contain repeated submissions and the derived-filename collision within core storage. Whether handlers writing files provide equivalent isolation, cleanup after partial failure, or safe replay is not established.

Hardening Proposals

• proposed — Check deployed names for case-variant collisions and reconcile them before relying on case-insensitive routing; enforce the chosen normalized identity with a database-backed uniqueness rule appropriate to each provider.
• proposed — Use an injective handler-facing filename or require handler storage to be scoped by exchange identity; verify that deployed handlers do not use the current filename as a shared storage key.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 23.08% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 13 functions across 9 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Title check	✅ Passed	The title clearly and concisely describes the main change: allowing gateway URL names to use multiple path segments.
Description check	✅ Passed	The description directly covers the route, validation, lookup, file-name, and UI changes in the changeset.

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Actionable comments posted: 1

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• 🪄 Fix CodeRabbit comments on this PR

🤖 Prompt to fix review comments

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Inline comments:
In @SW.Bitween.Api/Resources/ApiGateways/GatewayUrlName.cs:
- Line 22: Update the generated regex used by GatewayUrlName validation to end
with the true end-of-input anchor, so a final newline is rejected. Add a
validation test confirming that a name ending in a newline is invalid.

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Repository: simplify9/coderabbit/.coderabbit.yaml

Review profile: ASSERTIVE

Plan: Advanced

Run ID: 5fd9c3b1-9522-4aa6-a6b3-18c719afad15

📥 Commits

Reviewing files that changed from the base of the PR and between 971350f and 19e1aa5.

📒 Files selected for processing (9)

• SW.Bitween.Api/Controllers/GatewayController.cs
• SW.Bitween.Api/Resources/ApiGateways/GatewayUrlName.cs
• SW.Bitween.IntegrationTests/Tests/ApiGatewayTests.cs
• SW.Bitween.Web/ClientApp/src/lib/__tests__/identifiers.test.ts
• SW.Bitween.Web/ClientApp/src/lib/identifiers.ts
• SW.Bitween.Web/ClientApp/src/pages/api-gateways/ApiGatewayNewPage.tsx
• SW.Bitween.Web/ClientApp/src/pages/api-gateways/ApiGatewayPage.tsx
• SW.Bitween.Web/ClientApp/src/pages/api-gateways/ApiGatewaysPage.tsx
• SW.Bitween.Web/ClientApp/src/pages/api-gateways/AttachPartnerPage.tsx

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