refactor(server): add getErrorMessage helper and fix error-related type-aware lint errors (#704)

* refactor(server): add getErrorMessage helper and fix error-related type-aware lint errors in session.ts * fix build: correct parseClientCapabilities type handling
2026-05-05 19:57:35 +07:00
parent d359bffed5
commit 8b54d27cbc
2 changed files with 64 additions and 43 deletions
@@ -0,0 +1,27 @@
+/**
+ * Extracts a human-readable error message from an unknown error value.
+ * Handles Error instances, string errors, and other types safely.
+ */
+export function getErrorMessage(error: unknown): string {
+  if (error instanceof Error) {
+    return error.message;
+  }
+  if (typeof error === "string") {
+    return error;
+  }
+  return String(error);
+}
+
+/**
+ * Extracts an error message from an unknown error value, with a fallback
+ * for when no message can be extracted.
+ */
+export function getErrorMessageOr(error: unknown, fallback: string): string {
+  if (error instanceof Error) {
+    return error.message;
+  }
+  if (typeof error === "string" && error.length > 0) {
+    return error;
+  }
+  return fallback;
+}