Impl loadStorageFromFile

tslib/src/utils/loadStorageFromFile.ts

@@ -0,0 +1,23 @@
+import { SetterOrUpdater } from "recoil";
+import { loadJournalStorage } from "./journalStorage";
+import { loadSQLite3Storage } from "./sqlite3";
+
+export const loadStorageFromFile = (
+  file: File,
+  setStudies: SetterOrUpdater<Study[]>,
+): void => {
+  const r = new FileReader();
+  r.addEventListener("load", () => {
+    const arrayBuffer = r.result as ArrayBuffer | null;
+    if (arrayBuffer !== null) {
+      const header = new Uint8Array(arrayBuffer, 0, 16);
+      const headerString = new TextDecoder().decode(header);
+      if (headerString === "SQLite format 3\u0000") {
+        loadSQLite3Storage(arrayBuffer, setStudies);
+      } else {
+        loadJournalStorage(arrayBuffer, setStudies);
+      }
+    }
+  });
+  r.readAsArrayBuffer(file);
+};