discourse/lib/email.rb

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# frozen_string_literal: true
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require 'mail'
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module Email
# See https://www.iana.org/assignments/smtp-enhanced-status-codes/smtp-enhanced-status-codes.xhtml#smtp-enhanced-status-codes-1
SMTP_STATUS_SUCCESS = "2."
SMTP_STATUS_TRANSIENT_FAILURE = "4."
SMTP_STATUS_PERMANENT_FAILURE = "5."
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def self.is_valid?(email)
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return false unless String === email
EmailAddressValidator.valid_value?(email)
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end
def self.downcase(email)
return email unless Email.is_valid?(email)
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email.downcase
end
def self.obfuscate(email)
return email if !Email.is_valid?(email)
first, _, last = email.rpartition('@')
# Obfuscate each last part, except tld
last = last.split('.')
tld = last.pop
last.map! { |part| obfuscate_part(part) }
last << tld
"#{obfuscate_part(first)}@#{last.join('.')}"
end
def self.cleanup_alias(name)
name ? name.gsub(/[:<>,"]/, '') : name
end
def self.extract_parts(raw)
mail = Mail.new(raw)
text = nil
html = nil
if mail.multipart?
text = mail.text_part
html = mail.html_part
elsif mail.content_type.to_s["text/html"]
html = mail
else
text = mail
end
[text&.decoded, html&.decoded]
end
def self.site_title
SiteSetting.email_site_title.presence || SiteSetting.title
end
private
def self.obfuscate_part(part)
if part.size < 3
"*" * part.size
elsif part.size < 5
part[0] + "*" * (part.size - 1)
else
part[0] + "*" * (part.size - 2) + part[-1]
end
end
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end