Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: ed66ce01-7de7-441d-b598-49eee0be12df

Reviewing files that changed from the base of the PR and between db2f21f and bc8e399.

• stack.yaml.lock is excluded by !**/*.lock

• .hlint.yaml
• Surypus.cabal
• prometheus/prometheus.yml
• src/APIServer.hs
• src/DAL/Queries.hs
• src/DAL/Queries.hs.before_sql_fmt
• src/DAL/Queries.hs.sqlformat
• src/DAL/Queries.hs.tmp
• src/DAL/Repository.hs
• src/DAL/Repository/AccPlan.hs
• src/DAL/Repository/AccTurn.hs
• src/DAL/Repository/Bill.hs
• src/DAL/Repository/Currency.hs
• src/DAL/Repository/Goods.hs
• src/DAL/Repository/Location.hs
• src/DAL/Repository/Order.hs
• src/DAL/Repository/Payment.hs
• src/DAL/Repository/Person.hs
• src/DAL/Repository/Tax.hs
• src/DB/Connection.hs
• src/Domain/Payroll.hs
• src/Domain/Types.hs
• src/Service/AccountingService.hs
• src/Service/AuditService.hs
• src/Service/InventoryService.hs
• src/Service/PayrollService.hs
• src/Service/ReportService.hs
• src/Surypus/JWT.hs
• src/Surypus/TypeLevel.hs
• src/Surypus/WebSocket.hs
• stack.yaml
• test/API/ServerSpec.hs
• test/DB/RepositoriesSpec.hs
• test/Domain/BillSpec.hs
• test/Domain/GoodsSpec.hs
• test/Domain/LocationSpec.hs
• test/Domain/PersonSpec.hs
• test/Domain/TypesSpec.hs
• test/NewtypeGuardsTest.hs
• test/Test.hs

• Create PR with unit tests
• Commit unit tests in branch feature/service-api

Add type-level programming utilities for entities and documents

• Created new module with type-level programming utilities using type families and GADTs
• Defined EntityId, EntityFilter, and EntitySort type families for flexible entity operations
• Implemented RepositoryTF typeclass with type family-based methods for generic repository
 operations
• Added DocumentType GADT and Document GADT for type-safe document hierarchy with Bill, Order,
 Invoice, and Receipt variants
• Implemented DocumentOps typeclass with type-safe operations for extracting document properties

src/Surypus/TypeLevel.hs

Add documentation and fix repository pattern implementation

• Added extensive module documentation with practical usage examples for bill repository operations
• Fixed Repository typeclass implementation to return Int64 from create and Maybe entity
 from update and delete
• Improved error handling consistency across CRUD operations with proper ExceptT usage

src/DAL/Repository/Bill.hs

Add documentation and standardize repository implementation

• Added comprehensive module documentation with usage examples for currency repository operations
• Fixed Repository typeclass implementation to properly return entity IDs and optional entities
• Standardized error handling across all CRUD operations

src/DAL/Repository/Currency.hs

Add documentation and fix repository implementation

• Added detailed module documentation with practical examples for goods repository operations
• Fixed Repository typeclass implementation to return proper types from CRUD operations
• Standardized error handling and return value patterns

src/DAL/Repository/Goods.hs

Simplify bill domain tests to basic creation

• Removed complex QuickCheck property tests and validation logic tests
• Simplified test suite to focus on basic bill creation with required fields
• Removed tests for bill line calculations, VAT computations, and total summations

test/Domain/BillSpec.hs

Refactor accounting service with simplified architecture

• Simplified service structure to accept Pool directly instead of repository instances
• Replaced placeholder implementations with stub functions returning Left "Not implemented"
• Added getAccountTurnovers and validateTransaction functions with proper type signatures
• Updated data types with cleaner structure for Transaction, Entry, Ledger, and new
 Turnovers type

src/Service/AccountingService.hs

Add documentation and standardize repository implementation

• Added comprehensive module documentation with usage examples
• Fixed Repository typeclass implementation to return proper types from CRUD operations
• Standardized error handling across all repository functions

src/DAL/Repository/Location.hs

Simplify goods domain tests to basic creation

• Removed QuickCheck imports and property-based tests
• Simplified test suite to basic goods creation with required fields
• Removed tests for goods filters, stock records, and barcode functionality

test/Domain/GoodsSpec.hs

Add documentation and standardize repository implementation

• Added module documentation with usage examples for person repository operations
• Fixed Repository typeclass implementation to return proper types from CRUD operations
• Standardized error handling patterns

src/DAL/Repository/Person.hs

Refactor repository pattern with monadic error handling

• Refactored Repository typeclass to use RepositoryM monad (ExceptT-based) for error handling
• Changed method signatures to accept repository instance as first parameter instead of using type
 class constraints
• Added RepositoryContext, RepositoryT, and HasRepository typeclass for dependency injection
• Introduced isNotFoundMessage helper and runRepository function for executing repository
 operations
• Updated RepositoryError to use Text instead of String for error messages

src/DAL/Repository.hs

Add audit service for system-wide event logging

• Created new audit service module with comprehensive audit logging functionality
• Defined AuditService accepting Pool for database operations
• Implemented stub functions for logging and retrieving audit events with role-based filtering
• Added AuditAction enum with CRUD, authentication, and execution actions
• Added AuditEntityType enum covering all major entity types in the system

src/Service/AuditService.hs

Add tests for newtype guard implementations

• Created new test module for newtype guard validation
• Added tests for AccountBalance, StockQty, and TaxRate newtypes with creation and arithmetic
 operations
• Verified that newtypes support Num operations with proper scaling

test/NewtypeGuardsTest.hs

Simplify person domain tests to basic creation

• Removed complex tests for person status values and filter pagination
• Simplified test suite to focus on basic person creation with required fields
• Removed tests for extended person records and filter functionality

test/Domain/PersonSpec.hs

Implement report service with multiple report types

• Replaced placeholder implementation with comprehensive report service module
• Added ReportService accepting Pool for database operations
• Implemented stub functions for generating sales, inventory, financial, payroll, and tax reports
• Defined data types for SalesReport, InventoryReport, FinancialReport, PayrollSummary, and
 TaxReport

src/Service/ReportService.hs

Implement payroll service with calculation and reporting

• Replaced placeholder implementation with comprehensive payroll service module
• Added PayrollService accepting Pool for database operations
• Implemented stub functions for salary calculation, payroll processing, and report generation
• Defined data types for Employee, PayrollResult, and PayrollReport with detailed payroll
 information

src/Service/PayrollService.hs

Simplify location domain tests to basic creation

• Removed tests for location types and filter pagination
• Simplified test suite to focus on basic location creation with required fields
• Removed tests for location type variations and filter functionality

test/Domain/LocationSpec.hs

Extend connection pool configuration with tuning parameters

• Added pcStripes and pcIdleTime fields to PoolConfig for connection pool tuning
• Updated defaultPoolConfig with new fields set to 1 stripe and 60 seconds idle time
• Modified poolConfigFromEnv to preserve new configuration fields from defaults

src/DB/Connection.hs

Add utility functions and flag operations to domain types

• Added helper functions ppidToInt64 and int64ToPPID for PPID conversions
• Added toMoney and fromMoney functions for Money type conversions
• Introduced Flags32 newtype with Semigroup and Monoid instances for bitwise flag operations
• Added hasFlag function for checking flag membership
• Added accessor functions offset and limit for Pagination type

src/Domain/Types.hs

Implement inventory service with stock operations

• Replaced placeholder implementation with comprehensive inventory service module
• Added InventoryService accepting Pool for database operations
• Implemented stub functions for stock receipt, issue, transfer, and balance queries
• Added validateStockOperation function for operation validation

src/Service/InventoryService.hs

Fix repository pattern implementation for accounting turns

• Fixed Repository typeclass implementation to return Int64 from create and Maybe entity
 from update and delete
• Removed unused toDecimal import
• Standardized error handling patterns across CRUD operations

src/DAL/Repository/AccTurn.hs

Fix repository pattern implementation for orders

• Fixed Repository typeclass implementation to return proper types from CRUD operations
• Updated update method to return Maybe entity instead of bare entity
• Standardized error handling patterns

src/DAL/Repository/Order.hs

Fix repository pattern implementation for payments

• Fixed Repository typeclass implementation to return proper types from CRUD operations
• Updated update and delete methods to return Maybe entity and Nothing respectively
• Standardized error handling patterns

src/DAL/Repository/Payment.hs

Fix repository pattern implementation for taxes

• Fixed Repository typeclass implementation to return proper types from CRUD operations
• Updated update and delete methods to return Maybe entity and Nothing respectively
• Standardized error handling patterns

src/DAL/Repository/Tax.hs

Add API server module documentation

• Added comprehensive module documentation explaining API server purpose and usage
• Included example code for server configuration and startup
• Documented the server's role in exposing RESTful endpoints and middleware support

src/APIServer.hs

Clean up test imports and add type annotations

• Removed unused Test.QuickCheck import
• Added explicit type annotations to template count test for clarity

test/Test.hs

Remove unused import

• Removed unused unpreparable import from Hasql.Statement

src/DAL/Queries.hs

Update cabal file with new modules and dependencies

• Added extensive list of new modules to library exposed-modules including DAL, Domain, and Service
 modules
• Added new dependencies: mtl, scientific, jose, wai-websockets, websockets, warp,
 wai, http-types
• Updated executable dependencies to include servant, servant-server, and jose
• Reorganized test suite with explicit other-modules list and added test dependencies
• Changed ghc-options from -Wall -Werror to -Wall to allow warnings
• Added ghc-options -Wwarn to test suite

Surypus.cabal

Add JWT and WebSocket dependencies to stack configuration

• Added jose-0.10 and websockets-0.13.0.0 to extra-deps for JWT and WebSocket support

stack.yaml

Add hlint configuration for APIServer module

• Added hlint ignore rules for APIServer module to suppress false positive warnings for Use <> and
 Redundant $

.hlint.yaml

Add Prometheus monitoring configuration

• Created new Prometheus configuration file for metrics collection
• Configured scrape targets for surypus API server on port 8080 and PostgreSQL exporter on port 9187
• Set global scrape interval to 15 seconds with 5-second interval for surypus metrics

prometheus/prometheus.yml

Database query layer implementation with Hasql

• Introduces comprehensive database query layer with 60+ query functions for business entities
• Implements row decoders for mapping database results to Haskell types (Person, Goods, Bill, Order,
 etc.)
• Provides CRUD operations and specialized queries (search, pagination, aggregations)
• Includes pagination support with filtering and sorting capabilities for multiple entity types

src/DAL/Queries.hs.before_sql_fmt

Database query layer implementation with Hasql

• Identical content to before_sql_fmt file with same 60+ query functions
• Contains all row decoders and database operations for business entities
• Provides complete CRUD and specialized query functionality with pagination
• Represents formatted version of the query layer module

src/DAL/Queries.hs.sqlformat

Complete Data Access Layer with Query Functions

• Comprehensive database query module with 60+ functions for accessing business entities (persons,
 goods, locations, bills, stock, users, employees, orders, payments, etc.)
• Implements row decoders for converting database results into Haskell types using Hasql library
• Provides both simple fetch operations and advanced paginated queries with filtering and sorting
 capabilities
• Includes specialized queries for business analytics (sales summary, top-selling goods, inventory,
 dashboard stats, low stock alerts)

src/DAL/Queries.hs.tmp

...

src/Domain/Payroll.hs

...

test/API/ServerSpec.hs

...

test/DB/RepositoriesSpec.hs

...

test/Domain/TypesSpec.hs

Description

In Surypus.WebSocket, the route case ["ws", subPath] binds subPath as a single Text, but the
code passes it to T.intercalate "/" which expects [Text]. This prevents the module from
compiling.

Code

src/Surypus/WebSocket.hs[R96-100]

+      ["ws", subPath] ->
+        websocketsOr
+          WS.defaultConnectionOptions
+          (jwtWebSocketAppWithPath hub mConfig (T.intercalate "/" subPath))
+          (\_ respond' -> respond' (responseLBS status400 [] "WebSocket endpoint expected"))

Evidence

Wai.pathInfo is pattern matched into two segments, making subPath a single segment, yet it is
used as if it were a list of segments in T.intercalate.

src/Surypus/WebSocket.hs[90-101]
src/Surypus/WebSocket.hs[90-100]

Agent prompt

The issue below was found during a code review. Follow the provided context and guidance below and implement a solution

### Issue description
`T.intercalate "/" subPath` is applied to a `Text` path segment, causing a type error.

### Issue Context
The `Wai.pathInfo` branch `["ws", subPath]` binds `subPath :: Text`.

### Fix Focus Areas
- src/Surypus/WebSocket.hs[90-101]

### Suggested fix
Either:
- Change the match to capture multiple segments: `("ws" : subPathSegments)` and use `T.intercalate "/" subPathSegments`, or
- Keep `["ws", subPath]` and pass `subPath` directly without `intercalate`.

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Description

Surypus.WebSocket.handleMessage uses forM_ without importing it and attempts `WS.sendTextData
connection (WS.DataMessage msg)`, which does not typecheck as written. This prevents compilation and
breaks message relay.

Code

src/Surypus/WebSocket.hs[R167-172]

+handleMessage :: WebSocketHub -> Int -> Text -> WS.DataMessage -> IO ()
+handleMessage hub clientId path msg = do
+  clients <- readTVarIO (wshClients hub)
+  let filteredClients = filter (\(_, _, mPayload) -> canReceive path mPayload) clients
+  forM_ filteredClients $ \(_, connection, _) ->
+    WS.sendTextData connection (WS.DataMessage msg) `catch` \(_ :: SomeException) -> pure ()

Evidence

The import list does not include forM_, yet handleMessage uses it; additionally it passes an
invalid expression to sendTextData using WS.DataMessage applied as a value.

src/Surypus/WebSocket.hs[17-21]
src/Surypus/WebSocket.hs[167-173]

Agent prompt

The issue below was found during a code review. Follow the provided context and guidance below and implement a solution

### Issue description
`handleMessage` doesn't compile due to missing `forM_` import and incorrect use of `WS.sendTextData`.

### Issue Context
`msg` is already a `WS.DataMessage` from `receiveDataMessage`.

### Fix Focus Areas
- src/Surypus/WebSocket.hs[15-25]
- src/Surypus/WebSocket.hs[167-173]

### Suggested fix
- Import `forM_` (e.g., `import Data.Foldable (forM_)` or add it to the existing import list), and
- Forward the message using the correct WebSockets API (e.g., `WS.sendDataMessage connection msg`) or pattern-match `msg` and send appropriate text/binary payloads.

ⓘ Copy this prompt and use it to remediate the issue with your preferred AI generation tools

Description

Surypus.JWT no longer exports/defines generateSimpleToken, but APIServer still imports and calls
it. This causes a compile-time failure.

Code

src/Surypus/JWT.hs[R4-15]

+module Surypus.JWT
+  ( JWTPayload (..),
+    JWTConfig (..),
+    TokenPair (..),
+    defaultJWTConfig,
+    generateTokenPair,
+    generateAccessToken,
+    validateAccessToken,
+    generateRefreshToken,
+    validateRefreshToken,
+    refreshAccessToken,
+  )

Evidence

The JWT module export list does not include generateSimpleToken, while APIServer imports and calls
it in the login handler.

src/Surypus/JWT.hs[4-15]
src/APIServer.hs[60-72]
src/APIServer.hs[313-323]

Agent prompt

The issue below was found during a code review. Follow the provided context and guidance below and implement a solution

### Issue description
`generateSimpleToken` is referenced by APIServer but is not exported/implemented by Surypus.JWT anymore.

### Issue Context
This is a hard compile error due to missing symbol.

### Fix Focus Areas
- src/Surypus/JWT.hs[4-15]
- src/APIServer.hs[60-72]
- src/APIServer.hs[313-323]

### Suggested fix
Either:
- Re-introduce `generateSimpleToken` in `Surypus.JWT` as a compatibility wrapper (and export it), or
- Update APIServer to use `generateAccessToken`/`generateTokenPair` and handle the `Either` error path (and update the import list accordingly).

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Description

Surypus.JWT.validateRefreshToken ignores the parsed exp claim and always returns the Unix epoch as
the expiration time. Any refresh-token expiry logic using this result will be incorrect.

Code

src/Surypus/JWT.hs[R141-153]

validateRefreshToken :: JWTConfig -> Text -> AppResult (Int, UTCTime)
validateRefreshToken config token = do
-  case T.splitOn ":" token of
-    [_uuid, uid, expStr] ->
-      case reads (T.unpack uid) of
-        [(uId, "")] ->
-          case reads (T.unpack expStr) of
-            [(exp, "")] -> Right (uId, exp)
-            _ -> Left (AuthError "Invalid expiration")
-        _ -> Left (AuthError "Invalid user id")
-    _ -> Left (AuthError "Invalid refresh token format")
+  let secret = TE.encodeUtf8 (jwtSecret config)
+  case jwtDecode secret token of
+    Right claims -> case sub claims of
+      Nothing -> Left (AuthError "Missing subject")
+      Just subClaim ->
+        case reads (T.unpack subClaim) of
+          [(uId, "")] ->
+            case exp claims of
+              Nothing -> Left (AuthError "Missing expiration")
+              Just expClaim -> Right (uId, read "1970-01-01 00:00:00 UTC" :: UTCTime)
+          _ -> Left (AuthError "Invalid subject format")

Evidence

validateRefreshToken matches Just expClaim but returns read "1970-01-01 00:00:00 UTC" instead
of converting/using expClaim.

src/Surypus/JWT.hs[141-154]

Agent prompt

The issue below was found during a code review. Follow the provided context and guidance below and implement a solution

### Issue description
`validateRefreshToken` discards `expClaim` and returns a constant UTCTime.

### Issue Context
The function signature promises to return the refresh token's expiration time.

### Fix Focus Areas
- src/Surypus/JWT.hs[141-154]

### Suggested fix
Convert the numeric `exp` claim to `UTCTime` (e.g., using `posixSecondsToUTCTime`) and return it. Also consider validating `iss` (e.g., require `iss == "surypus-refresh"`) so access tokens cannot be used as refresh tokens.

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Description

Surypus.JWT.generateTokenPair and refreshAccessToken call error when jwtEncode fails, crashing the
server process. Token generation should surface failures as values (e.g., Either/AppResult)
instead of terminating.

Code

src/Surypus/JWT.hs[R102-105]

+  case (jwtEncode (secret, HS256) accessClaims, jwtEncode (secret, HS256) refreshClaims) of
+    (Right accessToken, Right refreshToken) -> pure $ TokenPair accessToken refreshToken accessExpiration
+    (Left err, _) -> error (show err)
+    (_, Left err) -> error (show err)

Evidence

Both token generation paths pattern match on jwtEncode results and invoke error (show err) on
failure.

src/Surypus/JWT.hs[94-105]
src/Surypus/JWT.hs[156-164]

Agent prompt

The issue below was found during a code review. Follow the provided context and guidance below and implement a solution

### Issue description
JWT encoding failures crash the entire process via `error`.

### Issue Context
Even if failures are rare, this turns a recoverable error into a hard outage.

### Fix Focus Areas
- src/Surypus/JWT.hs[94-105]
- src/Surypus/JWT.hs[156-164]

### Suggested fix
Change these functions to return `IO (Either Text ...)` (or `AppResult ...`) and propagate the encoding error to callers. Update callers to handle the Left case (HTTP 500 / auth error response as appropriate).

ⓘ Copy this prompt and use it to remediate the issue with your preferred AI generation tools