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# frozen_string_literal: true
module Users
class UpdateCanonicalEmailService
extend ActiveSupport::Concern
INCLUDED_DOMAINS_PATTERN = [/gmail.com/].freeze
def initialize(user:)
raise ArgumentError.new("Please provide a user") unless user&.is_a?(User)
@user = user
end
def execute
return unless user.email
return unless user.email.match? Devise.email_regexp
canonical_email = canonicalize_email
unless canonical_email
# the canonical email doesn't exist, probably because the domain doesn't match
# destroy any UserCanonicalEmail record associated with this user
user.user_canonical_email&.delete
# nothing else to do here
return
end
if user.user_canonical_email
# update to the new value
user.user_canonical_email.canonical_email = canonical_email
else
user.build_user_canonical_email(canonical_email: canonical_email)
end
end
private
attr_reader :user
def canonicalize_email
email = user.email
portions = email.split('@')
username = portions.shift
rest = portions.join
regex = Regexp.union(INCLUDED_DOMAINS_PATTERN)
return unless regex.match?(rest)
no_dots = username.tr('.', '')
before_plus = no_dots.split('+')[0]
"#{before_plus}@#{rest}"
end
end
end
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