Merge pull request #161 from crupest/upgrade

Upgrade packages and split front end and back end.

1 files changed, 14 insertions, 0 deletions

diff --git a/FrontEnd/src/app/utilities/rxjs.ts b/FrontEnd/src/app/utilities/rxjs.ts
new file mode 100644
index 00000000..0730b899
--- /dev/null
+++ b/FrontEnd/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;
+  });
+}