add

trading_assistant_api/services/user/internal/handler/user_handler.go

@@ -0,0 +1,86 @@
+package handler
+
+import (
+	"encoding/json"
+	"net/http"
+
+	"common/types"
+	"user/internal/model"
+	"user/internal/service"
+)
+
+type Handler struct {
+	S *service.Service
+}
+
+func New(s *service.Service) *Handler {
+	return &Handler{S: s}
+}
+
+func (h *Handler) Register(w http.ResponseWriter, r *http.Request) {
+	if r.Method != http.MethodPost {
+		writeJSON(w, http.StatusMethodNotAllowed, false, "method not allowed", nil)
+		return
+	}
+	var req model.RegisterReq
+	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
+		writeJSON(w, http.StatusBadRequest, false, "invalid json", nil)
+		return
+	}
+	userID, err := h.S.Register(req.Account, req.Password)
+	if err != nil {
+		switch err {
+		case service.ErrInvalidInput:
+			writeJSON(w, http.StatusBadRequest, false, "invalid account or password", nil)
+		case service.ErrAccountExists:
+			writeJSON(w, http.StatusConflict, false, "account exists", nil)
+		default:
+			writeJSON(w, http.StatusInternalServerError, false, "internal error", nil)
+		}
+		return
+	}
+	writeJSON(w, http.StatusCreated, true, "ok", map[string]string{"user_id": userID})
+}
+
+func (h *Handler) Login(w http.ResponseWriter, r *http.Request) {
+	if r.Method != http.MethodPost {
+		writeJSON(w, http.StatusMethodNotAllowed, false, "method not allowed", nil)
+		return
+	}
+	var req model.LoginReq
+	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
+		writeJSON(w, http.StatusBadRequest, false, "invalid json", nil)
+		return
+	}
+	userID, err := h.S.Login(req.Account, req.Password)
+	if err != nil {
+		switch err {
+		case service.ErrInvalidInput:
+			writeJSON(w, http.StatusBadRequest, false, "invalid account or password", nil)
+		case service.ErrUnauthorized:
+			writeJSON(w, http.StatusUnauthorized, false, "unauthorized", nil)
+		default:
+			writeJSON(w, http.StatusInternalServerError, false, "internal error", nil)
+		}
+		return
+	}
+	writeJSON(w, http.StatusOK, true, "ok", map[string]string{"user_id": userID})
+}
+
+func (h *Handler) Healthz(w http.ResponseWriter, r *http.Request) {
+	writeJSON(w, http.StatusOK, true, "ok", nil)
+}
+
+func (h *Handler) Version(w http.ResponseWriter, r *http.Request) {
+	writeJSON(w, http.StatusOK, true, "ok", map[string]string{"version": "user-service v0.1.0"})
+}
+
+func (h *Handler) Root(w http.ResponseWriter, r *http.Request) {
+	writeJSON(w, http.StatusOK, true, "ok", map[string]string{"service": "user"})
+}
+
+func writeJSON(w http.ResponseWriter, code int, status bool, msg string, data interface{}) {
+	w.Header().Set("Content-Type", "application/json")
+	w.WriteHeader(code)
+	json.NewEncoder(w).Encode(types.Response{Status: status, Message: msg, Data: data})
+}