258f4a8b95
* 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).
77 lines
2.4 KiB
Ruby
77 lines
2.4 KiB
Ruby
module EmailNormalizer
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module_function
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IGNORE_DOTS = %w[gmail.com]
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IGNORE_PLUS_ADDRESSING = %w[gmail.com hotmail.com outlook.com live.com]
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IGNORE_MINUS_ADDRESSING = %w[yahoo.com]
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CANONICAL_DOMAINS = {
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"googlemail.com" => "gmail.com",
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"hotmail.co.uk" => "outlook.com",
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"hotmail.co.jp" => "outlook.com",
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"hotmail.co.th" => "outlook.com",
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"hotmail.com" => "outlook.com",
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"hotmail.ca" => "outlook.com",
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"hotmail.de" => "outlook.com",
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"hotmail.es" => "outlook.com",
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"hotmail.fr" => "outlook.com",
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"hotmail.it" => "outlook.com",
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"live.com.au" => "outlook.com",
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"live.com.ar" => "outlook.com",
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"live.com.mx" => "outlook.com",
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"live.co.uk" => "outlook.com",
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"live.com" => "outlook.com",
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"live.ca" => "outlook.com",
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"live.cl" => "outlook.com",
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"live.cn" => "outlook.com",
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"live.de" => "outlook.com",
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"live.fr" => "outlook.com",
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"live.it" => "outlook.com",
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"live.jp" => "outlook.com",
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"live.nl" => "outlook.com",
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"live.se" => "outlook.com",
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"msn.com" => "outlook.com",
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"yahoo.com.au" => "yahoo.com",
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"yahoo.com.ar" => "yahoo.com",
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"yahoo.com.br" => "yahoo.com",
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"yahoo.com.cn" => "yahoo.com",
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"yahoo.com.hk" => "yahoo.com",
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"yahoo.com.mx" => "yahoo.com",
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"yahoo.com.ph" => "yahoo.com",
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"yahoo.com.sg" => "yahoo.com",
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"yahoo.com.tw" => "yahoo.com",
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"yahoo.com.vn" => "yahoo.com",
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"yahoo.co.id" => "yahoo.com",
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"yahoo.co.kr" => "yahoo.com",
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"yahoo.co.jp" => "yahoo.com",
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"yahoo.co.uk" => "yahoo.com",
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"yahoo.ca" => "yahoo.com",
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"yahoo.cn" => "yahoo.com",
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"yahoo.de" => "yahoo.com",
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"yahoo.es" => "yahoo.com",
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"yahoo.fr" => "yahoo.com",
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"yahoo.it" => "yahoo.com",
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"ymail.com" => "yahoo.com",
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"126.com" => "163.com",
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"aim.com" => "aol.com",
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"gmx.com" => "gmx.net",
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"gmx.at" => "gmx.net",
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"gmx.ch" => "gmx.net",
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"gmx.de" => "gmx.net",
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"gmx.fr" => "gmx.net",
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"gmx.us" => "gmx.net",
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}
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def normalize(address)
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return nil unless address.count("@") == 1
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name, domain = address.downcase.split("@")
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domain = CANONICAL_DOMAINS.fetch(domain, domain)
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name = name.delete(".") if domain.in?(IGNORE_DOTS)
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name = name.gsub(/\+.*\z/, "") if domain.in?(IGNORE_PLUS_ADDRESSING)
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name = name.gsub(/-.*\z/, "") if domain.in?(IGNORE_MINUS_ADDRESSING)
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"#{name}@#{domain}"
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end
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end
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