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users: move emails to separate table.

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* Move emails from users table to email_addresses table.
* Validate that addresses are formatted correctly and are unique across
  users. Existing invalid emails are grandfathered in.
* Add is_verified flag (the address has been confirmed by the user).
* Add is_deliverable flag (an undeliverable address is an address that bounces).
* Normalize addresses to prevent registering multiple accounts with the
  same email address (using tricks like Gmail's plus addressing).
This commit is contained in:
evazion
2020-03-10 21:36:16 -05:00
parent 41304d6add
commit 258f4a8b95
22 changed files with 285 additions and 36 deletions
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76
app/logical/email_normalizer.rb Normal file
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module EmailNormalizer
module_function
IGNORE_DOTS = %w[gmail.com]
IGNORE_PLUS_ADDRESSING = %w[gmail.com hotmail.com outlook.com live.com]
IGNORE_MINUS_ADDRESSING = %w[yahoo.com]
CANONICAL_DOMAINS = {
"googlemail.com" => "gmail.com",
"hotmail.co.uk" => "outlook.com",
"hotmail.co.jp" => "outlook.com",
"hotmail.co.th" => "outlook.com",
"hotmail.com" => "outlook.com",
"hotmail.ca" => "outlook.com",
"hotmail.de" => "outlook.com",
"hotmail.es" => "outlook.com",
"hotmail.fr" => "outlook.com",
"hotmail.it" => "outlook.com",
"live.com.au" => "outlook.com",
"live.com.ar" => "outlook.com",
"live.com.mx" => "outlook.com",
"live.co.uk" => "outlook.com",
"live.com" => "outlook.com",
"live.ca" => "outlook.com",
"live.cl" => "outlook.com",
"live.cn" => "outlook.com",
"live.de" => "outlook.com",
"live.fr" => "outlook.com",
"live.it" => "outlook.com",
"live.jp" => "outlook.com",
"live.nl" => "outlook.com",
"live.se" => "outlook.com",
"msn.com" => "outlook.com",
"yahoo.com.au" => "yahoo.com",
"yahoo.com.ar" => "yahoo.com",
"yahoo.com.br" => "yahoo.com",
"yahoo.com.cn" => "yahoo.com",
"yahoo.com.hk" => "yahoo.com",
"yahoo.com.mx" => "yahoo.com",
"yahoo.com.ph" => "yahoo.com",
"yahoo.com.sg" => "yahoo.com",
"yahoo.com.tw" => "yahoo.com",
"yahoo.com.vn" => "yahoo.com",
"yahoo.co.id" => "yahoo.com",
"yahoo.co.kr" => "yahoo.com",
"yahoo.co.jp" => "yahoo.com",
"yahoo.co.uk" => "yahoo.com",
"yahoo.ca" => "yahoo.com",
"yahoo.cn" => "yahoo.com",
"yahoo.de" => "yahoo.com",
"yahoo.es" => "yahoo.com",
"yahoo.fr" => "yahoo.com",
"yahoo.it" => "yahoo.com",
"ymail.com" => "yahoo.com",
"126.com" => "163.com",
"aim.com" => "aol.com",
"gmx.com" => "gmx.net",
"gmx.at" => "gmx.net",
"gmx.ch" => "gmx.net",
"gmx.de" => "gmx.net",
"gmx.fr" => "gmx.net",
"gmx.us" => "gmx.net",
}
def normalize(address)
return nil unless address.count("@") == 1
name, domain = address.downcase.split("@")
domain = CANONICAL_DOMAINS.fetch(domain, domain)
name = name.delete(".") if domain.in?(IGNORE_DOTS)
name = name.gsub(/\+.*\z/, "") if domain.in?(IGNORE_PLUS_ADDRESSING)
name = name.gsub(/-.*\z/, "") if domain.in?(IGNORE_MINUS_ADDRESSING)
"#{name}@#{domain}"
end
end