import { ResearchObject } from "../ResearchObject";

import { BaseTransformer } from "./BaseTransformer";

import { RoCrateTransformer } from "./RoCrateTransformer";

import { toRDF } from "jsonld";

export class RdfTransformer implements BaseTransformer {
  importObject(input: any): ResearchObject {
    throw new Error("importObject method not implemented.");
  }

  async exportObject(input: ResearchObject): Promise<any> {
    const jsonLdData = new RoCrateTransformer().exportObject(input);

    console.log("jsonLdData", jsonLdData);

    const nquads = await toRDF(jsonLdData, {
      format: "application/n-quads",
    });

    return nquads;
  }
}