1 files changed, 23 insertions, 0 deletions
diff --git a/FrontEnd/src/app/services/common.ts b/FrontEnd/src/app/services/common.ts
new file mode 100644
index 00000000..3bb6b9d7
--- /dev/null
+++ b/FrontEnd/src/app/services/common.ts
@@ -0,0 +1,23 @@
+import localforage from "localforage";
+
+import { HttpNetworkError } from "@/http/common";
+
+export const dataStorage = localforage.createInstance({
+  name: "data",
+  description: "Database for offline data.",
+  driver: localforage.INDEXEDDB,
+});
+
+export class ForbiddenError extends Error {
+  constructor(message?: string) {
+    super(message);
+  }
+}
+
+export function throwIfNotNetworkError(e: unknown): void {
+  if (!(e instanceof HttpNetworkError)) {
+    throw e;
+  }
+}
+
+export type BlobOrStatus = Blob | "loading" | "error";