feat: Users API, ownership transfer and removal of the legacy role string

api/handlers/ownership/ownershipHandler.go

@@ -0,0 +1,68 @@
+package ownership
+
+import (
+	"RenewCMS/api/pkg/access"
+	"RenewCMS/api/pkg/apperr"
+	validator "RenewCMS/api/pkg/validator"
+	"RenewCMS/internal/domain/user"
+	"RenewCMS/internal/infrastructure/useCases"
+	"encoding/json"
+	"errors"
+	"net/http"
+)
+
+type Handler struct {
+	TransferUseCase *useCases.TransferOwnershipUseCase
+}
+
+type TransferRequest struct {
+	UserID       uint32 `json:"user_id" validate:"required"`
+	ConfirmEmail string `json:"confirm_email" validate:"required"`
+}
+
+func NewHandler(transfer *useCases.TransferOwnershipUseCase) *Handler {
+	return &Handler{TransferUseCase: transfer}
+}
+
+func (h *Handler) Transfer(w http.ResponseWriter, r *http.Request) {
+	var request TransferRequest
+	if err := json.NewDecoder(r.Body).Decode(&request); err != nil {
+		http.Error(w, apperr.BodyErrorMessage, http.StatusBadRequest)
+		return
+	}
+	if err := validator.Validate.Struct(request); err != nil {
+		http.Error(w, err.Error(), http.StatusBadRequest)
+		return
+	}
+
+	transferred, err := h.TransferUseCase.Transfer(r.Context(), useCases.TransferOwnershipCommand{
+		Caller:       access.CallerOf(r),
+		UserID:       request.UserID,
+		ConfirmEmail: request.ConfirmEmail,
+	})
+	if err != nil {
+		writeTransferError(w, err)
+		return
+	}
+
+	body, err := json.Marshal(transferred)
+	if err != nil {
+		http.Error(w, "Internal server error", http.StatusInternalServerError)
+		return
+	}
+	w.Header().Set("Cache-Control", "no-store")
+	_, _ = w.Write(body)
+}
+
+func writeTransferError(w http.ResponseWriter, err error) {
+	switch {
+	case errors.Is(err, user.ErrInvalidTransfer):
+		http.Error(w, apperr.InvalidTransferErrorMessage, http.StatusBadRequest)
+	case errors.Is(err, user.ErrConfirmationMismatch):
+		http.Error(w, apperr.ConfirmationMismatchErrorMessage, http.StatusBadRequest)
+	case errors.Is(err, user.ErrRoleChanged):
+		http.Error(w, apperr.UserRoleChangedErrorMessage, http.StatusConflict)
+	default:
+		http.Error(w, "Internal server error", http.StatusInternalServerError)
+	}
+}