From b78d21a524f7a11ad29b4bd230f23825f80c3ed7 Mon Sep 17 00:00:00 2001
From: crupest <crupest@outlook.com>
Date: Sun, 26 Jul 2020 15:02:55 +0800
Subject: Merge front end repo

---
 Timeline/ClientApp/src/app/utilities/rxjs.ts | 14 ++++++++++++++
 1 file changed, 14 insertions(+)
 create mode 100644 Timeline/ClientApp/src/app/utilities/rxjs.ts

(limited to 'Timeline/ClientApp/src/app/utilities/rxjs.ts')

diff --git a/Timeline/ClientApp/src/app/utilities/rxjs.ts b/Timeline/ClientApp/src/app/utilities/rxjs.ts
new file mode 100644
index 00000000..1be49164
--- /dev/null
+++ b/Timeline/ClientApp/src/app/utilities/rxjs.ts
@@ -0,0 +1,14 @@
+import { OperatorFunction } from 'rxjs';
+import { catchError } from 'rxjs/operators';
+
+export function convertError<T, NewError>(
+  oldErrorType: { new (...args: never[]): unknown },
+  newErrorType: { new (): NewError }
+): OperatorFunction<T, T> {
+  return catchError((error) => {
+    if (error instanceof oldErrorType) {
+      throw new newErrorType();
+    }
+    throw error;
+  });
+}
-- 
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