track local history

src/localdb.ts

@@ -0,0 +1,53 @@
+import * as lf from "lovefield-ts/dist/es6/lf.js";
+
+export type DatabaseConnection = lf.DatabaseConnection;
+
+export const DEFAULT_DB_NAME = "saveremotedb";
+export const DEFAULT_TBL_DELETE_HISTORY = "filefolderoperationhistory";
+
+export interface FileFolderHistoryRecord {
+  key: string;
+  ctime: number;
+  mtime: number;
+  size: number;
+  action_when: number;
+  action_type: "delete" | "rename";
+  key_type: "folder" | "file";
+  rename_to: string;
+}
+
+export async function prepareDB() {
+  const schemaBuilder = lf.schema.create(DEFAULT_DB_NAME, 1);
+  schemaBuilder
+    .createTable(DEFAULT_TBL_DELETE_HISTORY)
+    .addColumn("id", lf.Type.INTEGER)
+    .addColumn("key", lf.Type.STRING)
+    .addColumn("ctime", lf.Type.INTEGER)
+    .addColumn("mtime", lf.Type.INTEGER)
+    .addColumn("size", lf.Type.INTEGER)
+    .addColumn("action_when", lf.Type.INTEGER)
+    .addColumn("action_type", lf.Type.STRING)
+    .addColumn("key_type", lf.Type.STRING)
+    .addPrimaryKey(["id"], true)
+    .addIndex("idxKey", ["key"]);
+  const db = await schemaBuilder.connect({
+    storeType: lf.DataStoreType.INDEXED_DB,
+  });
+  console.log("db connected");
+  return db;
+}
+
+export function destroyDB(db: lf.DatabaseConnection) {
+  db.close();
+  const req = indexedDB.deleteDatabase(DEFAULT_DB_NAME);
+  req.onsuccess = (event) => {
+    console.log("db deleted");
+  };
+  req.onblocked = (event) => {
+    console.warn("trying to delete db but it was blocked");
+  };
+  req.onerror = (event) => {
+    console.error("tried to delete db but something bad!");
+    console.error(event);
+  };
+}