/*
	Fosscord: A FOSS re-implementation and extension of the Discord.com backend.
	Copyright (C) 2023 Fosscord and Fosscord Contributors
	
	This program is free software: you can redistribute it and/or modify
	it under the terms of the GNU Affero General Public License as published
	by the Free Software Foundation, either version 3 of the License, or
	(at your option) any later version.
	
	This program is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
	GNU Affero General Public License for more details.
	
	You should have received a copy of the GNU Affero General Public License
	along with this program.  If not, see <https://www.gnu.org/licenses/>.
*/

export const EMAIL_REGEX =
	/^(([^<>()[\]\\.,;:\s@"]+(\.[^<>()[\]\\.,;:\s@"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/;

export function adjustEmail(email?: string): string | undefined {
	if (!email) return email;
	// body parser already checked if it is a valid email
	const parts = <RegExpMatchArray>email.match(EMAIL_REGEX);
	if (!parts || parts.length < 5) return undefined;

	return email;
	// // TODO: The below code doesn't actually do anything.
	// const domain = parts[5];
	// const user = parts[1];

	// // TODO: check accounts with uncommon email domains
	// if (domain === "gmail.com" || domain === "googlemail.com") {
	// 	// replace .dots and +alternatives -> Gmail Dot Trick https://support.google.com/mail/answer/7436150 and https://generator.email/blog/gmail-generator
	// 	const v = user.replace(/[.]|(\+.*)/g, "") + "@gmail.com";
	// }

	// if (domain === "google.com") {
	// 	// replace .dots and +alternatives -> Google Staff GMail Dot Trick
	// 	const v = user.replace(/[.]|(\+.*)/g, "") + "@google.com";
	// }

	// return email;
}