99 lines
		
	
	
		
			2.9 KiB
		
	
	
	
		
			Ruby
		
	
	
	
	
	
			
		
		
	
	
			99 lines
		
	
	
		
			2.9 KiB
		
	
	
	
		
			Ruby
		
	
	
	
	
	
class ProcessInteractionService < BaseService
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  # Record locally the remote interaction with our user
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  # @param [String] envelope Salmon envelope
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  # @param [Account] target_account Account the Salmon was addressed to
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  def call(envelope, target_account)
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    body = salmon.unpack(envelope)
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    xml  = Nokogiri::XML(body)
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    return unless contains_author?(xml)
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    username = xml.at_xpath('/xmlns:entry/xmlns:author/xmlns:name').content
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    url      = xml.at_xpath('/xmlns:entry/xmlns:author/xmlns:uri').content
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    domain   = Addressable::URI.parse(url).host
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    account  = Account.find_by(username: username, domain: domain)
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    if account.nil?
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      account = follow_remote_account_service.("#{username}@#{domain}", false)
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      return if account.nil?
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    end
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    if salmon.verify(envelope, account.keypair)
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      update_remote_profile_service.(xml.at_xpath('/xmlns:entry/xmlns:author'), account)
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      case verb(xml)
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      when :follow
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        follow!(account, target_account)
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      when :unfollow
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        unfollow!(account, target_account)
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      when :favorite
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        favourite!(xml, account)
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      when :post
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        add_post!(body, account) if mentions_account?(xml, target_account)
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      when :share
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        add_post!(body, account) unless status(xml).nil?
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      end
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    end
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  end
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  private
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  def contains_author?(xml)
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    !(xml.at_xpath('/xmlns:entry/xmlns:author/xmlns:name').nil? || xml.at_xpath('/xmlns:entry/xmlns:author/xmlns:uri').nil?)
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  end
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  def mentions_account?(xml, account)
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    xml.xpath('/xmlns:entry/xmlns:link[@rel="mentioned"]').each { |mention_link| return true if mention_link.attribute('href').value == url_for_target(account) }
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    false
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  end
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  def verb(xml)
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    xml.at_xpath('//activity:verb').content.gsub('http://activitystrea.ms/schema/1.0/', '').gsub('http://ostatus.org/schema/1.0/', '').to_sym
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  rescue
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    :post
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  end
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  def follow!(account, target_account)
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    account.follow!(target_account)
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    NotificationMailer.follow(target_account, account).deliver_later
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  end
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  def unfollow!(account, target_account)
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    account.unfollow!(target_account)
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  end
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  def favourite!(xml, from_account)
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    current_status = status(xml)
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    current_status.favourites.where(account: from_account).first_or_create!(account: from_account)
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    NotificationMailer.favourite(current_status, from_account).deliver_later
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  end
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  def add_post!(body, account)
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    process_feed_service.(body, account)
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  end
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  def status(xml)
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    Status.find(unique_tag_to_local_id(activity_id(xml), 'Status'))
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  end
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  def activity_id(xml)
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    xml.at_xpath('//activity:object/xmlns:id').content
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  end
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  def salmon
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    @salmon ||= OStatus2::Salmon.new
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  end
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  def follow_remote_account_service
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    @follow_remote_account_service ||= FollowRemoteAccountService.new
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  end
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  def process_feed_service
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    @process_feed_service ||= ProcessFeedService.new
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  end
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  def update_remote_profile_service
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    @update_remote_profile_service ||= UpdateRemoteProfileService.new
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  end
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end
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