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# frozen_string_literal: true
class ProcessMentionsService < BaseService
include Payloadable
# Scan status for mentions and fetch remote mentioned users, create
# local mention pointers, send Salmon notifications to mentioned
# remote users
# @param [Status] status
def call(status)
@status = status
return unless @status.local?
@previous_mentions = @status.active_mentions.includes(:account).to_a
@current_mentions = []
Status.transaction do
scan_text!
assign_mentions!
end
end
private
def scan_text!
@status.text = @status.text.gsub(Account::MENTION_RE) do |match|
username, domain = Regexp.last_match(1).split('@')
domain = begin
if TagManager.instance.local_domain?(domain)
nil
else
TagManager.instance.normalize_domain(domain)
end
end
mentioned_account = Account.find_remote(username, domain)
# Unapproved and unconfirmed accounts should not be mentionable
next match if mentioned_account&.local? && !(mentioned_account.user_confirmed? && mentioned_account.user_approved?)
# If the account cannot be found or isn't the right protocol,
# first try to resolve it
if mention_undeliverable?(mentioned_account)
begin
mentioned_account = ResolveAccountService.new.call(Regexp.last_match(1))
rescue Webfinger::Error, HTTP::Error, OpenSSL::SSL::SSLError, Mastodon::UnexpectedResponseError
mentioned_account = nil
end
end
# If after resolving it still isn't found or isn't the right
# protocol, then give up
next match if mention_undeliverable?(mentioned_account) || mentioned_account&.suspended?
mention = @previous_mentions.find { |x| x.account_id == mentioned_account.id }
mention ||= mentioned_account.mentions.new(status: @status)
@current_mentions << mention
"@#{mentioned_account.acct}"
end
@status.save!
end
def assign_mentions!
@current_mentions.each do |mention|
mention.save if mention.new_record?
end
# If previous mentions are no longer contained in the text, convert them
# to silent mentions, since withdrawing access from someone who already
# received a notification might be more confusing
removed_mentions = @previous_mentions - @current_mentions
Mention.where(id: removed_mentions.map(&:id)).update_all(silent: true) unless removed_mentions.empty?
end
def mention_undeliverable?(mentioned_account)
mentioned_account.nil? || (!mentioned_account.local? && !mentioned_account.activitypub?)
end
end
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