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# frozen_string_literal: true
# This class extracts all users found in a piece of text by the username or the
# email address
module Gitlab
class UserExtractor
# Not using `Devise.email_regexp` to filter out any chars that an email
# does not end with and not pinning the email to a start of end of a string.
EMAIL_REGEXP = /(?<email>([^@\s]+@[^@\s]+(?<!\W)))/
USERNAME_REGEXP = User.reference_pattern
def initialize(text)
# EE passes an Array to `text` in a few places, so we want to support both
# here.
@text = Array(text).join(' ')
end
def users
return User.none unless @text.present?
return User.none if references.empty?
@users ||= User.from_union(union_relations)
end
def usernames
matches[:usernames]
end
def emails
matches[:emails]
end
def references
@references ||= matches.values.flatten
end
def matches
@matches ||= {
emails: @text.scan(EMAIL_REGEXP).flatten.uniq,
usernames: @text.scan(USERNAME_REGEXP).flatten.uniq
}
end
private
def union_relations
relations = []
relations << User.by_any_email(emails) if emails.any?
relations << User.by_username(usernames) if usernames.any?
relations
end
end
end
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