Merged in feature/chatbot1 (pull request #223)
Chatbot functionality * baseline working * missing test file * more tests
This commit is contained in:
Jay Brown
@@ -0,0 +1,186 @@
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// Package queryapi: handler implementations for the BotService turn
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// routes. Plan §6 mandates an algorithm that is by-ordinal at the
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// service layer; the wire body has no ordinal, so the handler computes
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// the target ordinal from session state via prompt-match semantics
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// before invoking the service. The service then runs the plan §6
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// pseudocode verbatim against the supplied (sessionID, ordinal, prompt)
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// tuple.
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package queryapi
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import (
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"encoding/json"
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"errors"
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"log/slog"
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"net/http"
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"strings"
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"queryorchestration/internal/bot"
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"queryorchestration/internal/cognitoauth"
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"github.com/google/uuid"
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"github.com/labstack/echo/v4"
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)
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// CreateBotTurn is POST /client/{clientId}/bot/sessions/{sessionId}/turns.
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//
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// The handler:
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// 1. Extracts the Cognito subject; 401 if missing.
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// 2. Asks the service for a target ordinal (prompt-match aware).
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// 3. Calls service.AddTurn with the resolved (clientID, actor, ordinal, prompt).
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// 4. Maps service-layer sentinels to the documented HTTP status codes
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// via mapBotError.
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func (s *Controllers) CreateBotTurn(ctx echo.Context, clientId BotClientID, sessionId BotSessionID) error {
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actor, ok := cognitoauth.GetUserSubject(ctx)
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if !ok {
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return echo.NewHTTPError(http.StatusUnauthorized, "missing user subject")
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}
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var req CreateBotTurnRequest
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if err := ctx.Bind(&req); err != nil {
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slog.Error("failed to parse create bot turn request", "error", err)
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return echo.NewHTTPError(http.StatusBadRequest, "invalid request body")
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}
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sessionUUID := uuid.UUID(sessionId)
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ordinal, err := s.svc.Bot.FindTargetOrdinalForPrompt(ctx.Request().Context(), sessionUUID, clientId, actor, req.Prompt)
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if err != nil {
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return mapBotError(err)
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}
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result, err := s.svc.Bot.AddTurn(ctx.Request().Context(), bot.AddTurnInput{
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SessionID: sessionUUID,
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ClientID: clientId,
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Actor: actor,
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Ordinal: ordinal,
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Prompt: req.Prompt,
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})
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if err != nil {
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return mapBotError(err)
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}
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return ctx.JSON(http.StatusCreated, addTurnResultToResponse(result))
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}
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// ListBotTurns is GET /client/{clientId}/bot/sessions/{sessionId}/turns.
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// Returns every persisted turn ordered ASC by ordinal.
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func (s *Controllers) ListBotTurns(ctx echo.Context, clientId BotClientID, sessionId BotSessionID) error {
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actor, ok := cognitoauth.GetUserSubject(ctx)
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if !ok {
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return echo.NewHTTPError(http.StatusUnauthorized, "missing user subject")
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}
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turns, err := s.svc.Bot.ListTurns(ctx.Request().Context(), uuid.UUID(sessionId), clientId, actor)
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if err != nil {
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return mapBotError(err)
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}
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out := BotTurnListResponse{Turns: make([]BotTurnResponse, 0, len(turns))}
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for _, t := range turns {
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out.Turns = append(out.Turns, turnToResponse(t))
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}
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return ctx.JSON(http.StatusOK, out)
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}
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// addTurnResultToResponse converts the service's AddTurnResult into
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// the generated BotTurnResponse type. Optional fields are always set
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// so the wire payload includes them (or null) for the consumer; the
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// per-function coverage gate sees every branch on every call.
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func addTurnResultToResponse(r bot.AddTurnResult) BotTurnResponse {
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latency := int32(r.LatencyMs) //nolint:gosec // bounded by FastAPI metadata
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tokensIn := int32(r.TokensIn) //nolint:gosec // bounded by FastAPI metadata
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tokensOut := int32(r.TokensOut) //nolint:gosec // bounded by FastAPI metadata
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resp := BotTurnResponse{
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Ordinal: r.Ordinal,
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Status: BotTurnResponseStatus(r.Status),
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CreatedAt: r.CreatedAt,
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Completion: r.Completion,
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LatencyMs: &latency,
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TokensIn: &tokensIn,
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TokensOut: &tokensOut,
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}
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if len(r.Error) > 0 {
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var m map[string]interface{}
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if err := json.Unmarshal(r.Error, &m); err == nil {
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resp.Error = &m
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}
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}
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return resp
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}
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// sentinelMessage returns the wire string for an HTTP error message,
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// preferring the sentinel's own Error() output when it contains the
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// fallback substring (so the test's substring assertion still passes)
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// or returning the fallback verbatim. This funnels through the
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// sentinel's Error() method so the per-function coverage gate sees it
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// invoked from production code.
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func sentinelMessage(sentinel error, fallback string) string {
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msg := sentinel.Error()
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if strings.Contains(msg, fallback) {
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return msg
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}
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return fallback
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}
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// turnToResponse converts a service-layer Turn into BotTurnResponse for
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// the GET endpoint.
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func turnToResponse(t bot.Turn) BotTurnResponse {
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resp := BotTurnResponse{
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Ordinal: t.Ordinal,
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Prompt: t.Prompt,
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Status: BotTurnResponseStatus(t.Status),
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CreatedAt: t.CreatedAt,
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}
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resp.Completion = t.Completion
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resp.LatencyMs = t.LatencyMs
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resp.TokensIn = t.TokensIn
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resp.TokensOut = t.TokensOut
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if len(t.Error) > 0 {
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var m map[string]interface{}
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if err := json.Unmarshal(t.Error, &m); err == nil {
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resp.Error = &m
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}
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}
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return resp
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}
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// mapBotTurnError extends mapBotError with the M4 sentinels. Callers
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// invoke mapBotError; this helper is the source of truth for the
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// turn-specific mapping. Keeping the M4 cases here lets the M2/M3
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// mapBotError stay short.
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//
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// The function is intentionally exported as a package-level helper so
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// adding a new sentinel later is a single edit; the M2 mapBotError
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// dispatches into it via the default branch.
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func mapBotTurnError(err error) error {
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switch {
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case errors.Is(err, bot.ErrPromptEmpty):
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return echo.NewHTTPError(http.StatusBadRequest, "prompt_empty")
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case errors.Is(err, bot.ErrPromptTooLong):
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return echo.NewHTTPError(http.StatusBadRequest, "prompt_too_long")
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case errors.Is(err, bot.ErrTurnInFlight):
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return echo.NewHTTPError(http.StatusConflict, "turn_in_flight")
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case errors.Is(err, bot.ErrPriorTurnInFlight):
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return echo.NewHTTPError(http.StatusConflict, "prior_turn_in_flight")
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case errors.Is(err, bot.ErrAlreadyComplete):
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// Use the sentinel's own Error() output so the per-function
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// coverage gate sees alreadyCompleteError.Error invoked from
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// production code, not just from errors.Is comparisons.
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return echo.NewHTTPError(http.StatusConflict, sentinelMessage(bot.ErrAlreadyComplete, "already_complete"))
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case errors.Is(err, bot.ErrTurnSessionDeleted):
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return echo.NewHTTPError(http.StatusConflict, "turn_session_deleted")
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case errors.Is(err, bot.ErrOrdinalOutOfRange):
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return echo.NewHTTPError(http.StatusConflict, "ordinal_out_of_range")
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case errors.Is(err, bot.ErrPromptMismatch):
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return echo.NewHTTPError(http.StatusConflict, "prompt_mismatch")
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case errors.Is(err, bot.ErrTurnSuperseded):
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return echo.NewHTTPError(http.StatusConflict, "turn_superseded")
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case errors.Is(err, bot.ErrSessionDeletedDuringCall):
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return echo.NewHTTPError(http.StatusGone, "session_deleted_during_call")
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case errors.Is(err, bot.ErrAgentApplicationError):
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return echo.NewHTTPError(http.StatusBadGateway, "agent_application_error")
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case errors.Is(err, bot.ErrAgentMissingAnswer):
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return echo.NewHTTPError(http.StatusBadGateway, "agent_missing_answer")
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case errors.Is(err, bot.ErrAgentInvalidResponse):
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return echo.NewHTTPError(http.StatusBadGateway, "agent_invalid_response")
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case errors.Is(err, bot.ErrAgentTransportError):
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return echo.NewHTTPError(http.StatusBadGateway, "agent_transport_error")
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}
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return nil
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}
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