YARA-937

src/expert-claim/exceptions/business-rule.exception.ts

@@ -0,0 +1,25 @@
+import { HttpException, HttpStatus } from "@nestjs/common";
+
+/**
+ * Thrown when a well-formed request violates a business rule that cannot be
+ * expressed as a generic validation error.  Returns HTTP 422 with a structured
+ * body so the frontend can branch on `errorCode` without string-matching the
+ * human-readable `message`.
+ *
+ * Response body shape:
+ * ```json
+ * { "errorCode": "SOME_CODE", "message": "Human-readable explanation." }
+ * ```
+ */
+export class BusinessRuleException extends HttpException {
+  constructor(
+    public readonly errorCode: string,
+    message: string,
+  ) {
+    super({ errorCode, message }, HttpStatus.UNPROCESSABLE_ENTITY);
+  }
+}
+
+export const BusinessErrorCode = {
+  DAMAGE_EXPERT_RESEND_LIMIT_EXCEEDED: "DAMAGE_EXPERT_RESEND_LIMIT_EXCEEDED",
+} as const;