feat: added API gateway

internal/gw/handler/results_handler.go

@@ -0,0 +1,77 @@
+package handler
+
+import (
+	"net/http"
+
+	"datarush/internal/gw/domain"
+	"datarush/internal/gw/grpc_client"
+	"datarush/internal/gw/utils"
+
+	resultspb "datarush/pkg/api/results"
+)
+
+type ResultsHandler struct {
+	resultsClient *grpc_client.ResultsClient
+}
+
+func NewResultsHandler(resultsClient *grpc_client.ResultsClient) *ResultsHandler {
+	return &ResultsHandler{resultsClient: resultsClient}
+}
+
+func (h *ResultsHandler) GetCompetitionResults(w http.ResponseWriter, r *http.Request) {
+	competitionID := getPathParam(r, "competition_id")
+	pageSize := getQueryParamInt32(r, "page_size", 20)
+	pageToken := getQueryParamInt32(r, "page_token", 0)
+
+	req := &resultspb.GetCompetitionResultsRequest{
+		CompetitionId: competitionID,
+		PageSize:      pageSize,
+		PageToken:     pageToken,
+	}
+
+	resp, err := h.resultsClient.GetCompetitionResults(r.Context(), req)
+	if err != nil {
+		utils.RespondError(w, domain.NewInternalServerError("failed to get competition results"))
+		return
+	}
+
+	results := make([]domain.UserResultResponse, len(resp.Results))
+	for i, result := range resp.Results {
+		results[i] = *utils.UserResultProtoToHTTP(result)
+	}
+
+	utils.RespondJSON(w, http.StatusOK, &domain.CompetitionResultsResponse{
+		Results:       results,
+		TotalCount:    resp.TotalCount,
+		NextPageToken: resp.NextPageToken,
+	})
+}
+
+func (h *ResultsHandler) GetMyResults(w http.ResponseWriter, r *http.Request) {
+	userID, err := getUserIDFromContext(r.Context())
+	if err != nil {
+		utils.RespondError(w, domain.NewUnauthorizedError("unauthorized"))
+		return
+	}
+
+	competitionID := getPathParam(r, "competition_id")
+
+	result, err := h.resultsClient.GetUserCompetitionResults(r.Context(), competitionID, userID)
+	if err != nil {
+		utils.RespondError(w, domain.NewInternalServerError("failed to get user results"))
+		return
+	}
+
+	utils.RespondJSON(w, http.StatusOK, utils.UserResultProtoToHTTP(result))
+}
+
+func (h *ResultsHandler) RecalculateResults(w http.ResponseWriter, r *http.Request) {
+	competitionID := getPathParam(r, "competition_id")
+
+	if err := h.resultsClient.RecalculateResults(r.Context(), competitionID); err != nil {
+		utils.RespondError(w, domain.NewInternalServerError("failed to recalculate results"))
+		return
+	}
+
+	w.WriteHeader(http.StatusNoContent)
+}