server: implement ISEs w/o public error outputs

server/api/error.go

@@ -38,4 +38,12 @@ func ErrRender(err error) render.Renderer {
 	}
 }
 
+func ErrInternal(err error) render.Renderer {
+	return &ErrResponse{
+		Err:            err,
+		HTTPStatusCode: 500,
+		StatusText:     "Internal server error.",
+	}
+}
+
 var ErrNotFound = &ErrResponse{HTTPStatusCode: 404, StatusText: "Resource not found."}

server/api/user.go

@@ -25,14 +25,14 @@ func ListUsers(w http.ResponseWriter, r *http.Request) {
 	dbUsers, err := dbGetAllUsers()
 	if err != nil {
 		slog.Error("user: failed to fetch users", "error", err)
-		render.Render(w, r, ErrRender(err))
+		render.Render(w, r, ErrInternal(err))
 		return
 	}
 
 	slog.Debug("user: successfully fetched users", "count", len(dbUsers))
 	if err := render.RenderList(w, r, NewUserListResponse(dbUsers)); err != nil {
 		slog.Error("user: failed to render user list response", "error", err)
-		render.Render(w, r, ErrRender(err))
+		render.Render(w, r, ErrInternal(err))
 		return
 	}
 }
@@ -53,7 +53,7 @@ func GetUser(w http.ResponseWriter, r *http.Request) {
 			render.Render(w, r, ErrNotFound)
 		} else {
 			slog.Error("user: failed to fetch user", "userid", parsed.String(), "error", err)
-			render.Render(w, r, ErrRender(err))
+			render.Render(w, r, ErrInternal(err))
 		}
 		return
 	}
@@ -61,7 +61,7 @@ func GetUser(w http.ResponseWriter, r *http.Request) {
 	slog.Debug("user: rendering user", "userid", user.ID, "username", user.Name)
 	if err := render.Render(w, r, NewUserPayloadResponse(user)); err != nil {
 		slog.Error("user: failed to render user", "userid", parsed.String(), "error", err)
-		render.Render(w, r, ErrRender(err))
+		render.Render(w, r, ErrInternal(err))
 	}
 }
 
@@ -104,7 +104,7 @@ func NewUser(w http.ResponseWriter, r *http.Request) {
 	err = dbAddUser(&newUser)
 	if err != nil {
 		slog.Error("user: failed to add new user", "userID", newUser.ID, "userName", newUser.Name, "error", err)
-		render.Render(w, r, ErrRender(err))
+		render.Render(w, r, ErrInternal(err))
 		return
 	}