use lazy_static::lazy_static; use std::collections::HashSet; use crate::database::types::Email; // from https://github.com/mailcheck/mailcheck/wiki/List-of-Popular-Domains lazy_static! { static ref POPULAR_DOMAINS: HashSet<&'static str> = vec!( /* Default domains included */ "aol.com", "att.net", "comcast.net", "facebook.com", "gmail.com", "gmx.com", "googlemail.com", "google.com", "hotmail.com", "hotmail.co.uk", "mac.com", "me.com", "mail.com", "msn.com", "live.com", "sbcglobal.net", "verizon.net", "yahoo.com", "yahoo.co.uk", /* Other global domains */ "email.com", "fastmail.fm", "games.com" /* AOL */, "gmx.net", "hush.com", "hushmail.com", "icloud.com", "iname.com", "inbox.com", "lavabit.com", "love.com" /* AOL */, "mailbox.org", "posteo.de", "outlook.com", "pobox.com", "protonmail.ch", "protonmail.com", "tutanota.de", "tutanota.com", "tutamail.com", "tuta.io", "keemail.me", "rocketmail.com" /* Yahoo */, "safe-mail.net", "wow.com" /* AOL */, "ygm.com" /* AOL */, "ymail.com" /* Yahoo */, "zoho.com", "yandex.com", /* United States ISP domains */ "bellsouth.net", "charter.net", "cox.net", "earthlink.net", "juno.com", /* British ISP domains */ "btinternet.com", "virginmedia.com", "blueyonder.co.uk", "freeserve.co.uk", "live.co.uk", "ntlworld.com", "o2.co.uk", "orange.net", "sky.com", "talktalk.co.uk", "tiscali.co.uk", "virgin.net", "wanadoo.co.uk", "bt.com", /* Domains used in Asia */ "sina.com", "sina.cn", "qq.com", "naver.com", "hanmail.net", "daum.net", "nate.com", "yahoo.co.jp", "yahoo.co.kr", "yahoo.co.id", "yahoo.co.in", "yahoo.com.sg", "yahoo.com.ph", "163.com", "yeah.net", "126.com", "21cn.com", "aliyun.com", "foxmail.com", /* French ISP domains */ "hotmail.fr", "live.fr", "laposte.net", "yahoo.fr", "wanadoo.fr", "orange.fr", "gmx.fr", "sfr.fr", "neuf.fr", "free.fr", /* German ISP domains */ "gmx.de", "hotmail.de", "live.de", "online.de", "t-online.de" /* T-Mobile */, "web.de", "yahoo.de", /* Italian ISP domains */ "libero.it", "virgilio.it", "hotmail.it", "aol.it", "tiscali.it", "alice.it", "live.it", "yahoo.it", "email.it", "tin.it", "poste.it", "teletu.it", /* Russian ISP domains */ "mail.ru", "rambler.ru", "yandex.ru", "ya.ru", "list.ru", /* Belgian ISP domains */ "hotmail.be", "live.be", "skynet.be", "voo.be", "tvcablenet.be", "telenet.be", /* Argentinian ISP domains */ "hotmail.com.ar", "live.com.ar", "yahoo.com.ar", "fibertel.com.ar", "speedy.com.ar", "arnet.com.ar", /* Domains used in Mexico */ "yahoo.com.mx", "live.com.mx", "hotmail.es", "hotmail.com.mx", "prodigy.net.mx", /* Domains used in Brazil */ "yahoo.com.br", "hotmail.com.br", "outlook.com.br", "uol.com.br", "bol.com.br", "terra.com.br", "ig.com.br", "itelefonica.com.br", "r7.com", "zipmail.com.br", "globo.com", "globomail.com", "oi.com.br" ).into_iter().collect(); } pub fn anonymize_address(email: &Email) -> Option { email.as_str() .rsplit('@') .next() .map(|domain| domain.to_lowercase()) .and_then(|domain| { if POPULAR_DOMAINS.contains(&domain.as_str()) { Some(domain) } else { domain.rsplit('.').next().map(|tld| tld.to_owned()) } }) } pub fn anonymize_address_fallback(email: &Email) -> String { anonymize_address(email).unwrap_or_else(|| "unknown".to_owned()) } #[cfg(test)] mod test { use super::*; #[test] fn known_domain() { let email = "user@hotmail.be".parse::().unwrap(); assert_eq!("hotmail.be", anonymize_address(&email).unwrap()); } #[test] fn unknown_domain() { let email = "user@example.org".parse::().unwrap(); assert_eq!("org", anonymize_address(&email).unwrap()); } }