feat: custom content type icons, built-in types, user lookup

api/handlers/user/lookupHandler.go

@@ -0,0 +1,66 @@
+package user
+
+import (
+	"RenewCMS/api/pkg/apperr"
+	"RenewCMS/api/pkg/response"
+	domainUser "RenewCMS/internal/domain/user"
+	"RenewCMS/internal/infrastructure/useCases"
+	"errors"
+	"net/http"
+	"strconv"
+	"strings"
+)
+
+type LookupHandler struct {
+	LookupUseCase *useCases.LookupUserNamesUseCase
+}
+
+type userNameResponse struct {
+	ID          uint32 `json:"id"`
+	DisplayName string `json:"display_name"`
+}
+
+func NewLookupHandler(lookup *useCases.LookupUserNamesUseCase) *LookupHandler {
+	return &LookupHandler{LookupUseCase: lookup}
+}
+
+func parseLookupIDs(raw string) ([]uint32, bool) {
+	if raw == "" {
+		return nil, false
+	}
+	if strings.Count(raw, ",")+1 > domainUser.MaxLookupIDs {
+		return nil, false
+	}
+	parts := strings.Split(raw, ",")
+	ids := make([]uint32, 0, len(parts))
+	for _, part := range parts {
+		id, err := strconv.ParseUint(part, 10, 32)
+		if err != nil {
+			return nil, false
+		}
+		ids = append(ids, uint32(id))
+	}
+	return ids, true
+}
+
+func (h *LookupHandler) Lookup(w http.ResponseWriter, r *http.Request) {
+	ids, ok := parseLookupIDs(r.URL.Query().Get("ids"))
+	if !ok {
+		http.Error(w, apperr.BodyErrorMessage, http.StatusBadRequest)
+		return
+	}
+	names, err := h.LookupUseCase.Lookup(ids)
+	if errors.Is(err, domainUser.ErrInvalidLookup) {
+		http.Error(w, apperr.BodyErrorMessage, http.StatusBadRequest)
+		return
+	}
+	if err != nil {
+		http.Error(w, "Internal server error", http.StatusInternalServerError)
+		return
+	}
+	items := make([]userNameResponse, 0, len(names))
+	for _, name := range names {
+		items = append(items, userNameResponse{ID: name.ID, DisplayName: name.DisplayName})
+	}
+	response.WriteJSON(w, http.StatusOK, items)
+}