feat: add onboarding with oldmarr import (#1606)

packages/old-import/src/import/collections/common.ts

@@ -0,0 +1,33 @@
+import { objectEntries } from "@homarr/common";
+import type { Database, InferInsertModel } from "@homarr/db";
+import { schema } from "@homarr/db";
+
+type TableKey = {
+  [K in keyof typeof schema]: (typeof schema)[K] extends { _: { brand: "Table" } } ? K : never;
+}[keyof typeof schema];
+
+export const createDbInsertCollection = <TTableKey extends TableKey>(tablesInInsertOrder: TTableKey[]) => {
+  const context = tablesInInsertOrder.reduce(
+    (acc, key) => {
+      acc[key] = [];
+      return acc;
+    },
+    {} as { [K in TTableKey]: InferInsertModel<(typeof schema)[K]>[] },
+  );
+
+  return {
+    ...context,
+    insertAll: (db: Database) => {
+      db.transaction((transaction) => {
+        for (const [key, values] of objectEntries(context)) {
+          if (values.length >= 1) {
+            transaction
+              .insert(schema[key])
+              .values(values as never)
+              .run();
+          }
+        }
+      });
+    },
+  };
+};