import { type_manager } from "./functions.js";
import { database } from "./database.js";

class database_downloader {
    #url;
    #database;

    constructor(url) {
        if (!type_manager.is_string(url)) {
            throw "Url to the database must be an string.";
        }

        this.#url = url;
    }

    async download() {
        const response = await fetch(this.#url);
    
        if (!response.ok) {
            throw "Can not download database. Error: " + response.status;
        }

        if (response.headers.get("content-type") !== "application/json") {
            throw "Response content type of the database must be an json.";
        }

        this.#database = new database(await response.json());
    }

    get result() {
        return this.#database;
    }
}

export { database_downloader };