'use strict';

const db = require('../../database');
const meta = require('../../meta');

module.exports = {
	name: 'Generate customHTML block from old customJS setting',
	timestamp: Date.UTC(2017, 9, 12),
	method: function (callback) {
		db.getObjectField('config', 'customJS', (err, newHTML) => {
			if (err) {
				return callback(err);
			}

			let newJS = [];

			// Forgive me for parsing HTML with regex...
			const scriptMatch = /^<script\s?(?!async|deferred)?>([\s\S]+?)<\/script>/m;
			let match = scriptMatch.exec(newHTML);

			while (match) {
				if (match[1]) {
					// Append to newJS array
					newJS.push(match[1].trim());

					// Remove the match from the existing value
					newHTML = ((match.index > 0 ? newHTML.slice(0, match.index) : '') + newHTML.slice(match.index + match[0].length)).trim();
				}

				match = scriptMatch.exec(newHTML);
			}

			// Combine newJS array
			newJS = newJS.join('\n\n');

			// Write both values to config
			meta.configs.setMultiple({
				customHTML: newHTML,
				customJS: newJS,
			}, callback);
		});
	},
};