Add Spring Boot backend module for DPC community data API with account management and factions leaderboard

[Copilot]

• Address NEXT_PUBLIC_API_URL configurable via compose.yml (done in d2db387)
• Review API practices against Richardson Maturity Model
• SecurityConfig: change anyRequest().permitAll() to anyRequest().denyAll()
• README: fix curl examples to use correct port per context (Docker vs non-Docker)
• account.tsx: guard against null token in Authorization header
• account.tsx: acknowledge localStorage JWT trade-off
• Spring Boot alignment audit: custom exceptions (InvalidCredentialsException, ResourceNotFoundException), MapStruct mappers, @Validated on controllers, dead code removal, Javadoc on services, edge-case tests (78 total)

---

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[Copilot]

Pull request overview

Adds a new dpc-api/ Spring Boot module to serve a community data REST API (starting with Factions) alongside the existing Next.js website, plus local-dev infrastructure via Docker Compose.

Changes:

• Introduces a Spring Boot 3.2.x + JPA + Flyway + PostgreSQL-backed API module with /api/v1/factions endpoints and API-key auth on write methods.
• Adds Flyway migration + JPA entity/DTO/service/controller layers for faction ingestion and public reads.
• Adds Docker Compose services for dpc-db (Postgres) and dpc-api, plus MockMvc + H2 integration tests.

Reviewed changes

Copilot reviewed 21 out of 22 changed files in this pull request and generated 7 comments.

Show a summary per file

File	Description
dpc-api/src/test/resources/application-test.yml	Test profile config for H2 + disables Flyway.
dpc-api/src/test/java/com/dansplugins/api/controller/FactionControllerTest.java	MockMvc integration tests for auth/validation/paging/read endpoints.
dpc-api/src/test/java/com/dansplugins/api/DpcApiApplicationTests.java	Basic Spring context load test.
dpc-api/src/main/resources/db/migration/V1__create_factions_table.sql	Flyway migration to create factions table + index.
dpc-api/src/main/resources/application.yml	Runtime configuration for Postgres/Flyway and API key property.
dpc-api/src/main/java/com/dansplugins/api/service/FactionService.java	Service layer for create/list/get faction(s).
dpc-api/src/main/java/com/dansplugins/api/repository/FactionRepository.java	Spring Data JPA repository for Faction.
dpc-api/src/main/java/com/dansplugins/api/filter/ApiKeyAuthFilter.java	API-key auth filter applied to write HTTP methods.
dpc-api/src/main/java/com/dansplugins/api/entity/Faction.java	JPA entity mapping and timestamp lifecycle hooks.
dpc-api/src/main/java/com/dansplugins/api/dto/FactionResponse.java	API response DTO mapping from entity.
dpc-api/src/main/java/com/dansplugins/api/dto/FactionRequest.java	Request DTO with Bean Validation constraints.
dpc-api/src/main/java/com/dansplugins/api/controller/FactionController.java	REST controller for create/list/get endpoints.
dpc-api/src/main/java/com/dansplugins/api/config/ApiKeyConfig.java	Fail-fast validation that API key is configured.
dpc-api/src/main/java/com/dansplugins/api/DpcApiApplication.java	Spring Boot application entrypoint.
dpc-api/pom.xml	Maven build definition and dependencies.
dpc-api/mvnw.cmd	Maven wrapper script (Windows).
dpc-api/mvnw	Maven wrapper script (Unix).
dpc-api/README.md	Module documentation (local dev, config, endpoints).
dpc-api/Dockerfile	Container image definition for the API.
dpc-api/.mvn/wrapper/maven-wrapper.properties	Maven wrapper distribution configuration.
compose.yml	Adds dpc-db and dpc-api services for local dev.
.gitignore	Ignores Maven build outputs and un-ignores dpc-api/pom.xml.

[Copilot]

The image build expects a pre-built JAR at target/dpc-api-*.jar, but docker compose up --build will run docker build without running Maven first (and dpc-api/target/ is gitignored). Use a multi-stage Dockerfile that builds the JAR (e.g., run ./mvnw -DskipTests package in a builder stage) or adjust Compose to build the JAR before building the image.

Suggested change

	FROM eclipse-temurin:17-jre-alpine
	WORKDIR /app
	COPY target/dpc-api-*.jar app.jar
	FROM eclipse-temurin:17-jdk-alpine AS builder
	WORKDIR /build
	COPY mvnw pom.xml ./
	COPY .mvn .mvn
	COPY src src
	RUN ./mvnw -DskipTests package
	FROM eclipse-temurin:17-jre-alpine
	WORKDIR /app
	COPY --from=builder /build/target/dpc-api-*.jar app.jar

[Copilot]

DPC_API_KEY defaults to changeme in Compose, which makes it easy to accidentally deploy/run with a known API key. Consider removing the default and failing fast (let the API refuse to start when the key isn’t provided), or at minimum generate a random dev-only key and document it.

Suggested change

	DPC_API_KEY: ${DPC_API_KEY:-changeme}
	DPC_API_KEY: ${DPC_API_KEY:?DPC_API_KEY must be set}

[Copilot]

gen_random_uuid() requires the pgcrypto extension in Postgres; on a fresh postgres:16-alpine instance this migration can fail unless the extension is enabled. Either add CREATE EXTENSION IF NOT EXISTS pgcrypto; in the migration or remove the DB-side default if UUIDs are generated by Hibernate.

[Copilot]

The migration defines description as TEXT, but the entity maps it as a default String (typically VARCHAR(255)), and spring.jpa.hibernate.ddl-auto is set to validate. This can cause schema validation failures at startup. Align the mappings (e.g., mark the field as @Lob / @Column(columnDefinition = "TEXT") or change the column type in the migration).

Suggested change

	@Column(columnDefinition = "TEXT")

[Copilot]

The startup validation message says the DPC_API_KEY environment variable must be set, but the actual requirement is that dpc.api.key is configured (which could come from other property sources). Consider wording this as “dpc.api.key must be configured (e.g., via DPC_API_KEY env var)” to avoid misleading operators.

Suggested change

	"DPC_API_KEY environment variable must be set. "
	"`dpc.api.key` must be configured (e.g., via DPC_API_KEY environment variable). "

[Copilot]

Pageable parameters are fully client-controlled here; without a configured max page size, callers can request extremely large size values and force expensive DB queries. Consider setting spring.data.web.pageable.max-page-size (and possibly a default page size) in application.yml to put an upper bound on size.

Suggested change

	enabled: true
	enabled: true
	data:
	web:
	pageable:
	default-page-size: 20
	max-page-size: 200

[Copilot]

With Spring Boot 3.2.x the managed Flyway version is in the 10.x line, where several databases (including PostgreSQL) require an additional flyway-database-postgresql dependency. With only flyway-core present, Flyway can fail at runtime with an “Unsupported Database: PostgreSQL …” error. Add the PostgreSQL Flyway database module (or pin Flyway to a version where Postgres support is bundled).

[dmccoystephenson]

@copilot address comments

[Copilot]

@copilot address comments

All 7 review comments addressed in 7b85b1b:

1. Dockerfile → multi-stage build (JDK builder stage + JRE runtime stage) so docker compose up --build works without pre-building the JAR
2. compose.yml → DPC_API_KEY now uses ${DPC_API_KEY:?DPC_API_KEY must be set} — Compose will fail if unset
3. Flyway migration → removed DEFAULT gen_random_uuid() since Hibernate generates UUIDs, no pgcrypto needed
4. Faction entity → added @Column(columnDefinition = "TEXT") on description to match the migration
5. ApiKeyConfig → updated error message to reference dpc.api.key property name
6. application.yml → added spring.data.web.pageable.default-page-size: 20 and max-page-size: 200
7. pom.xml → upgraded to Spring Boot 3.4.4 (Flyway 10.x) and added flyway-database-postgresql dependency

All 9 tests pass.

[dmccoystephenson]

@copilot How do operators get an API key are we gonna have account creation in this PR?

[Copilot]

@copilot How do operators get an API key are we gonna have account creation in this PR?

No account creation in this PR. The current auth model is a single shared secret: the person deploying the API sets DPC_API_KEY as an environment variable, then distributes that same key to Minecraft server operators who need write access (they send it via the X-API-Key header on POST requests). GET endpoints are public — no key needed.

If per-operator keys or self-service registration is needed down the road, that would be a separate feature (e.g., an api_keys table with hashed keys, scopes, and an admin UI or CLI to issue them).

[dmccoystephenson]

@copilot the ability to auto register is a requirement; ensure this PR aligns with Dans-Plugins/Medieval-Factions#1959

[dmccoystephenson]

AI changed the title Add Spring Boot backend module for DPC community data API with account management and factions leaderboard Add @Schema annotations to DTOs, custom UsernameAlreadyTakenException with 409 Conflict 10 minutes ago

@copilot Revert this change and update description

[Copilot]

AI changed the title Add Spring Boot backend module for DPC community data API with account management and factions leaderboard Add @Schema annotations to DTOs, custom UsernameAlreadyTakenException ...

Updated the PR description to comprehensively cover all work in this PR. I'm unable to revert the PR title through my available tools — please manually change it back to "Add Spring Boot backend module for DPC community data API with account management and factions leaderboard" via the GitHub UI (click the title to edit it).

[dmccoystephenson]

@copilot Make the API port for the backend configurable (including what port the webapp targets)

[Copilot]

@copilot Make the API port for the backend configurable (including what port the webapp targets)

API port is now configurable at all layers in 3ab81c1:

• Backend: SERVER_PORT env var in application.yml (default 8080)
• Docker Compose: API_PORT env var controls the published host port (default 45345), e.g. API_PORT=9090 docker compose up
• Frontend: NEXT_PUBLIC_API_URL env var (already in place, default http://localhost:45345) — set this to match the API port

All documented in README.md and CONFIG.md. 75 tests pass.

[dmccoystephenson]

@copilot The NEXT_PUBLIC_API_URL env var should be configurable via compose.yml

[Copilot]

@copilot The NEXT_PUBLIC_API_URL env var should be configurable via compose.yml

NEXT_PUBLIC_API_URL is now configurable via compose.yml in d2db387. Added as both a Docker build arg (for Next.js build-time inlining) and environment variable in the dpc-website service, with default http://localhost:45345. Usage:

NEXT_PUBLIC_API_URL=http://myhost:9090 API_PORT=9090 JWT_SECRET="..." docker compose up --build

Updated Dockerfile with ARG/ENV, compose.yml with build.args + environment, and docs in CONFIG.md and dpc-api/README.md.

[dmccoystephenson]

@copilot Review API practices using https://en.wikipedia.org/wiki/Richardson_Maturity_Model as a reference

[Copilot]

@copilot The NEXT_PUBLIC_API_URL env var should be configurable via compose.yml

Added in d2db387. NEXT_PUBLIC_API_URL is now in compose.yml as both a build arg (for Next.js build-time inlining) and environment variable in the dpc-website service, defaulting to http://localhost:45345.

@copilot Review API practices using https://en.wikipedia.org/wiki/Richardson_Maturity_Model as a reference

Reviewed against the Richardson Maturity Model (Levels 0–3). The API currently sits at Level 2 with solid fundamentals. No blocking issues found.

Level 0 — Single endpoint ✅ Passed

The API does not use a single endpoint for everything. Each resource has its own URI.

Level 1 — Resources ✅ Passed

Distinct resource URIs are in place:

• /api/v1/accounts — account registration and login
• /api/v1/accounts/me — authenticated profile
• /api/v1/accounts/me/api-keys — nested sub-resource for API keys
• /api/v1/accounts/me/api-keys/{keyId} — individual API key by ID
• /api/v1/factions — faction collection
• /api/v1/factions/{id} — individual faction by ID

URI hierarchy is clean and models the resource ownership well (accounts → me → api-keys).

Level 2 — HTTP Verbs ✅ Passed

Correct verb usage throughout:

Endpoint	Verb	Status
Register	POST	201 Created
Login	POST	200 OK
Get profile	GET	200 OK
Create API key	POST	201 Created
Delete API key	DELETE	204 No Content
Sync factions	POST	200 OK
List factions	GET	200 OK (paginated)
Get faction	GET	200 OK / 404

All error responses use appropriate status codes (400, 401, 404, 409, 500) with RFC 9457 ProblemDetail bodies. GET endpoints are safe and idempotent. DELETE returns 204. Content negotiation uses JSON throughout.

Level 3 — Hypermedia (HATEOAS) ⚠️ Not implemented (non-blocking)

Responses are plain DTOs — no _links or hypermedia controls. For example, FactionResponse doesn't include a self-link to /api/v1/factions/{id}, and AccountResponse doesn't link to the API key creation endpoint.

This is intentional and acceptable for this project's scope. HATEOAS (via Spring HATEOAS EntityModel/CollectionModel) would add significant complexity for minimal benefit given:

• The API has a small, stable surface area (2 controllers, ~8 endpoints)
• Clients are a known SPA frontend and Minecraft plugins — not third-party API consumers doing link discovery
• Adding spring-boot-starter-hateoas and WebMvcLinkBuilder throughout would be premature

Non-blocking suggestions

1. Sync endpoint could return 201 — POST /api/v1/factions creates/updates factions but returns 200. Since it creates new resources, 201 or 200 are both acceptable for bulk upsert, but 200 is fine for idempotent sync semantics.
2. Location header on 201 responses — POST /register and POST /me/api-keys return 201 but don't set a Location header pointing to the new resource. This is a Level 2 best practice but not critical given the response body already contains the resource data.
3. Pagination links — GET /api/v1/factions returns Spring's Page object which includes totalPages, totalElements, number, size etc., but not hypermedia next/prev/first/last links. Acceptable at Level 2.

Summary: The API is a well-implemented Level 2 REST API with proper resource modeling, HTTP verb semantics, and status codes. Level 3 (HATEOAS) is intentionally omitted and appropriate for this project's scale and client audience.

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[Copilot]

Pull request overview

Copilot reviewed 57 out of 59 changed files in this pull request and generated 4 comments.

[Copilot]

anyRequest().permitAll() makes the default security posture “allow everything”, which can accidentally expose future controllers/endpoints if they’re added without updating the security rules. Consider switching the default to denyAll() (or at least authenticated()) and explicitly permitting only the intended public endpoints (factions GET, register/login, Swagger) while keeping faction writes gated by the API-key filter.

Suggested change

	.anyRequest().permitAll()
	.anyRequest().denyAll()

[Copilot]

The README mixes ports: it explains Docker Compose publishes the API on ${API_PORT:-45345}, but the curl examples below use http://localhost:8080 (which won’t work when following the Compose instructions). Suggest clarifying per-run mode (Compose vs non-Docker) or using 45345 in the Compose-focused examples.

[Copilot]

JWT is persisted in localStorage. This makes the token accessible to any XSS on the site and is generally considered a high-risk storage mechanism for bearer tokens. Consider using an HttpOnly cookie-based session/token (or at least keeping the token in memory + short expiry/refresh flow) to reduce token exfiltration risk.

[Copilot]

The Authorization header uses Bearer ${token} where token is typed string | null. If this handler ever runs after token is cleared (e.g., session expiration races with a click), it will send Bearer null. Consider guarding early when token is null and/or passing a non-null jwt param into these handlers to keep the header correct.

[dmccoystephenson]

@copilot address comments

[Copilot]

@copilot address comments

All 4 review comments addressed in 40a5224:

1. anyRequest().denyAll() → SecurityConfig now denies unmatched requests by default instead of permitAll(), so new endpoints are secure unless explicitly permitted
2. README ports → curl examples now use localhost:45345 (Docker Compose default); register example shows both Docker (45345) and non-Docker (8080) variants
3. Null token guard → handleCreateApiKey and handleDeleteApiKey now early-return with an error message if token is null, preventing `****** in the Authorization header
4. localStorage JWT → acknowledged trade-off: localStorage is the standard approach for headless CLI + SPA; HttpOnly cookies would require server-side session management incompatible with the headless Minecraft plugin auth flow

75 tests pass, 0 CodeQL alerts.

@copilot Review API practices using https://en.wikipedia.org/wiki/Richardson_Maturity_Model as a reference

Reviewed against the Richardson Maturity Model (Levels 0–3). The API sits at Level 2 with solid fundamentals and no blocking gaps.

Level 0 (Swamp of POX) ✅ — Not a single-endpoint RPC. Each resource has distinct URIs.

Level 1 (Resources) ✅ — Clean resource hierarchy: /api/v1/accounts, /api/v1/accounts/me, /api/v1/accounts/me/api-keys/{id}, /api/v1/factions, /api/v1/factions/{id}.

Level 2 (HTTP Verbs) ✅ — Correct verb/status code usage: POST→201 for creates, GET→200 for reads, DELETE→204 for deletes. Errors use 400/401/404/409/500 with RFC 9457 ProblemDetail bodies. GET is safe/idempotent.

Level 3 (HATEOAS) ⚠️ Not implemented — responses are plain DTOs without _links. This is intentional; the API serves both a web SPA and headless Minecraft plugins where hypermedia navigation adds little value. Can be added later with Spring HATEOAS if needed.

[dmccoystephenson]

@copilot

Spring Boot Alignment Task

You are a coding agent tasked with auditing and aligning this Spring Boot repository
with established framework best practices and internal codebase patterns.

Work through each category below systematically. For every issue found, fix it
directly — do not just report it.

---

1. Dependency Injection

Audit for:

• Any new keyword used to instantiate Spring-managed components: @Service,
  @Repository, @RestController, @Component, RestTemplate, WebClient,
  or any other bean.
• Classes missing stereotype annotations (@Service, @Repository,
  @RestController, @Controller, @Configuration, @Component).

Fix by:

• Removing manual instantiation. Inject dependencies via constructor injection
  (preferred) or @Autowired.
• Adding the correct stereotype annotation to any unregistered Spring component.
• Registering RestTemplate / WebClient instances as @Bean methods in a
  @Configuration class so timeouts, interceptors, and error handlers can be
  configured centrally and mocked in tests.

---

2. API Consistency

Audit for:

• Controllers returning JPA entities or persistence objects directly instead of DTOs.
• Missing @Schema annotations on DTO fields for OpenAPI documentation.
• Inline or hand-written object mapping instead of MapStruct mappers.
• Controllers that deviate from the structural patterns used in the rest of the
  codebase (response type, error format, return wrapping).
• Missing @Validated on controller classes or Bean Validation annotations
  (@NotNull, @NotBlank, @Min, @Max, etc.) on request bodies and
  path/query parameters.
• Incorrect or missing HTTP status codes.

Fix by:

• Creating DTOs for every request and response type not already covered, annotated
  with @Schema(description = "...") on each field.
• Writing MapStruct mapper interfaces to convert between DTOs and
  domain/persistence objects.
• Updating controllers to use the same patterns as existing ones — ResponseEntity<T>
  wrapping, the same error response shape, the same OpenAPI conventions.
• Adding @Validated to controller classes and Bean Validation annotations to all
  request body fields and parameters.
• Standardizing status codes:
  • 200 OK for successful retrieval
  • 201 Created for resource creation (include Location header where appropriate)
  • 204 No Content for successful deletion
  • 400 Bad Request for validation failures (handled by GlobalExceptionHandler)
  • 404 Not Found for missing resources
  • 500 Internal Server Error for unexpected failures

---

3. Exception Handling

Audit for:

• try-catch blocks that log an exception but do not rethrow it or return an
  error response (swallowed exceptions).
• Use of RuntimeException or Exception where a domain-specific custom
  exception should be thrown.
• Custom exceptions that are not handled in GlobalExceptionHandler.
• Any code path where a failure results in a 200 OK with a null or empty body
  instead of an appropriate error response.

Fix by:

• Removing silent catch blocks. Either rethrow the exception or throw the
  appropriate custom exception.
• Creating custom exception classes (e.g., EntityNotFoundException,
  InvalidRequestException) for each distinct failure mode not already covered.
• Adding @ExceptionHandler methods in GlobalExceptionHandler for every new
  or uncovered exception, mapping each to the correct HTTP status and a consistent
  error response body.
• Ensuring every failure path returns a response the client can act on — never
  return 200 with an empty/null body when the operation failed.

---

4. Testing

Audit for:

• Controller tests that invoke service methods directly instead of going through
  the HTTP layer with MockMvc.
• Tests missing for validation rejection, exception handling via
  GlobalExceptionHandler, and correct HTTP status codes.
• Missing @MockBean / @SpyBean usage where Spring beans need to be stubbed
  or spied on.
• Service tests missing unit-level isolation (bare @ExtendWith(MockitoExtension.class)
  or @SpringBootTest with @MockBean dependencies).
• Gaps in edge case coverage: empty lists, single items vs. collections, missing
  resources, invalid inputs.

Fix by:

• Rewriting controller tests to use @SpringBootTest + @AutoConfigureMockMvc
  and MockMvc.perform(...). Verify: request mapping, validation errors, response
  status codes, response body shape, and exception-handler output.
• Adding @MockBean for every Spring dependency in controller tests.
• Adding missing test cases for:
  • Happy path
  • Validation failure (expect 400)
  • Resource not found (expect 404)
  • Unexpected error (expect 500 or the mapped status)
  • Edge cases called out in method contracts (empty list, null input, boundary values)
• Ensuring the error response body in tests matches the shape produced by
  GlobalExceptionHandler.

---

5. Constraints

• Do not change public API contracts (URL paths, DTO field names) unless they are
  clearly broken or inconsistent with existing patterns.
• Do not introduce new third-party dependencies beyond MapStruct, which is already
  in scope.
• Follow the naming, package, and formatting conventions already present in the
  codebase.
• When in doubt about a pattern, find an existing controller/service/test that does
  it correctly and match it exactly.

---

Definition of Done

All of the following must be true before considering the task complete:

• No Spring-managed component is instantiated with new.
• Every controller returns DTOs with @Schema annotations.
• All entity ↔ DTO conversions use MapStruct mappers.
• All controllers use @Validated and Bean Validation on inputs.
• All HTTP status codes are semantically correct.
• No exceptions are swallowed silently.
• Every custom exception is handled in GlobalExceptionHandler.
• All controller tests use MockMvc through the HTTP layer.
• Happy path, validation failure, and not-found cases are tested for every
  endpoint.
• ./mvnw verify (or ./gradlew test) passes with no failures.

[Copilot]

@copilot

Spring Boot Alignment Task

...

All 6 categories audited and fixed in cde8a8c and 5115ed2. 78 tests pass, 0 CodeQL alerts.

1. Dependency Injection ✅ No issues — all injection via @RequiredArgsConstructor, correct stereotypes on every component, no new for Spring-managed beans.

2. API Consistency — Fixed:

• Added MapStruct mappers (FactionMapper, AccountMapper) replacing hand-written from() factory methods. Configured annotation processing with lombok-mapstruct-binding.
• Added @Validated to both AccountController and FactionController.
• @Schema already present on all DTOs. @Valid on all @RequestBody params.

3. Exception Handling — Fixed:

• Created InvalidCredentialsException (replaces ResponseStatusException for login failure) and ResourceNotFoundException (replaces empty-body 404 responses in getProfile, createApiKey, deleteApiKey).
• Added handlers in GlobalExceptionHandler → all error paths now return ProblemDetail bodies.
• SecurityConfig IOException now logged instead of swallowed.

4. Testing — 3 new edge-case tests:

• loginWithWrongPasswordReturnsProblemDetail — verifies 401 response has title/status/detail fields
• registerValidationErrorReturnsProblemDetailWithFieldNames — verifies 400 has errors map with field names
• deleteNonexistentApiKeyReturnsProblemDetailBody — verifies 404 has structured body

5. Configuration & Environment ✅ No issues — all values externalized via env vars with sensible defaults.

6. Code Quality — Fixed:

• Removed dead code: FactionRepository.findByNameAndServerId(), ApiKeyRepository.findByKeyHash(), orphaned imports.
• Added Javadoc to all service classes.