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import axios from 'axios';

import extractMeta from '../extractMeta.js';

export default class FileParser {

#updateURL;

#downloadURL;

constructor(updateURL, downloadURL) {

this.#updateURL = updateURL;

this.#downloadURL = downloadURL;

}

parseData(data) {

if (

typeof data === 'string' &&

data.includes('// ==UserScript==') &&

data.includes('// ==/UserScript==')

) {

return extractMeta(data);

}

return data;

}

parseVersion({ version } = {}) {

return version;

}

parseDownload({ downloadURL } = {}) {

return downloadURL;

}

async getUpdateData(url = this.#updateURL) {

const { data } = await axios.get(url);

return this.parseData(data);

}

async getVersion(data = this.getUpdateData()) {

const resolvedData = await Promise.resolve(data);

if (!resolvedData) throw new Error('File not found', this.#updateURL);

const version = this.parseVersion(resolvedData);

if (!version || typeof version !== 'string') throw new Error('Version not found');

return version;

}

async getDownload(data) {

if (this.#downloadURL) return this.#downloadURL;

const resolvedData = await Promise.resolve(data || this.getUpdateData());

const downloadURL = this.parseDownload(resolvedData);

if (!downloadURL || typeof downloadURL !== 'string') throw new Error('URL not found');

return downloadURL;

}

}