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# frozen_string_literal: true
module Gitlab
module Utils
module Email
extend self
# Replaces most visible characters with * to obfuscate an email address
# deform adds a fix number of * to ensure the address cannot be guessed. Also obfuscates TLD with **
def obfuscated_email(email, deform: false)
regex = ::Gitlab::UntrustedRegexp.new('^(..?)(.*)(@.?)(.*)(\..+)$')
match = regex.match(email)
return email unless match
if deform
# Ensure we can show two characters for the username, even if the username has
# only one character. Boring solution is to just duplicate the character.
email_start = match[1]
email_start += email_start if email_start.length == 1
email_start + '*' * 5 + match[3] + '*' * 5 + "#{match[5][0..1]}**"
else
match[1] + '*' * (match[2] || '').length + match[3] + '*' * (match[4] || '').length + match[5]
end
end
end
end
end
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