Add support for both wasm/ffi version of sqlite3

utils/db_ffi.ts

@@ -0,0 +1,36 @@
+import { Database, DatabaseOpenOptions } from "sqlite3/mod.ts";
+import { QueryParameterSet, Row, RowObject } from "./db_interface.ts";
+
+export class DbFfi {
+    db;
+    constructor(path: string, options?: DatabaseOpenOptions) {
+        this.db = new Database(path, options);
+    }
+
+    close(_force?: boolean) {
+        this.db.close();
+    }
+
+    execute(sql: string) {
+        this.db.exec(sql);
+    }
+
+    query<R extends Row = Row>(
+        sql: string,
+        params?: QueryParameterSet,
+    ): Array<R> {
+        return this.db.prepare(sql).values(params);
+    }
+
+    queryEntries<O extends RowObject = RowObject>(
+        sql: string,
+        params?: QueryParameterSet,
+    ): Array<O> {
+        return this.db.prepare(sql).all(params);
+    }
+
+    transaction<V>(fn: () => V): V {
+        const re = this.db.transaction(fn);
+        return re();
+    }
+}