feat: added API gateway

internal/gw/handler/achievements_handler.go

@@ -0,0 +1,69 @@
+package handler
+
+import (
+	"net/http"
+
+	"datarush/internal/gw/domain"
+	"datarush/internal/gw/grpc_client"
+	"datarush/internal/gw/utils"
+)
+
+type AchievementsHandler struct {
+	achievementsClient *grpc_client.AchievementsClient
+}
+
+func NewAchievementsHandler(achievementsClient *grpc_client.AchievementsClient) *AchievementsHandler {
+	return &AchievementsHandler{achievementsClient: achievementsClient}
+}
+
+func (h *AchievementsHandler) ListAchievements(w http.ResponseWriter, r *http.Request) {
+	achievements, err := h.achievementsClient.ListAchievements(r.Context())
+	if err != nil {
+		utils.RespondError(w, domain.NewInternalServerError("failed to list achievements"))
+		return
+	}
+
+	response := make([]domain.AchievementResponse, len(achievements))
+	for i, ach := range achievements {
+		response[i] = *utils.AchievementProtoToHTTP(ach)
+	}
+
+	utils.RespondJSON(w, http.StatusOK, &domain.ListAchievementsResponse{
+		Achievements: response,
+	})
+}
+
+func (h *AchievementsHandler) GetAchievement(w http.ResponseWriter, r *http.Request) {
+	achievementID := getPathParam(r, "achievement_id")
+
+	achievement, err := h.achievementsClient.GetAchievement(r.Context(), achievementID)
+	if err != nil {
+		utils.RespondError(w, domain.NewNotFoundError("achievement not found"))
+		return
+	}
+
+	utils.RespondJSON(w, http.StatusOK, utils.AchievementProtoToHTTP(achievement))
+}
+
+func (h *AchievementsHandler) GetUserAchievements(w http.ResponseWriter, r *http.Request) {
+	userID := getPathParam(r, "user_id")
+
+	achievements, err := h.achievementsClient.GetUserAchievements(r.Context(), userID)
+	if err != nil {
+		utils.RespondError(w, domain.NewInternalServerError("failed to get user achievements"))
+		return
+	}
+
+	response := make([]domain.UserAchievementResponse, len(achievements))
+	for i, ach := range achievements {
+		response[i] = domain.UserAchievementResponse{
+			AchievementID: ach.Achievement.Id,
+			UserID:        userID,
+			EarnedAt:      ach.ReceivedAt.AsTime(),
+		}
+	}
+
+	utils.RespondJSON(w, http.StatusOK, &domain.ListUserAchievementsResponse{
+		Achievements: response,
+	})
+}