136 lines
		
	
	
		
			4.2 KiB
		
	
	
	
		
			Ruby
		
	
	
	
	
	
			
		
		
	
	
			136 lines
		
	
	
		
			4.2 KiB
		
	
	
	
		
			Ruby
		
	
	
	
	
	
# frozen_string_literal: true
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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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    xml.encoding = 'utf-8'
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    return unless contains_author?(xml)
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    username = xml.at_xpath('/xmlns:entry/xmlns:author/xmlns:name', xmlns: TagManager::XMLNS).content
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    url      = xml.at_xpath('/xmlns:entry/xmlns:author/xmlns:uri', xmlns: TagManager::XMLNS).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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    return if DomainBlock.blocked?(domain)
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    if account.nil?
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      account = follow_remote_account_service.call("#{username}@#{domain}")
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    end
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    return if account.suspended?
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    if salmon.verify(envelope, account.keypair)
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      update_remote_profile_service.call(xml.at_xpath('/xmlns:entry', xmlns: TagManager::XMLNS), account, true)
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      case verb(xml)
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      when :follow
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        follow!(account, target_account) unless target_account.locked? || target_account.blocking?(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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      when :delete
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        delete_post!(xml, account)
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      when :block
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        reflect_block!(account, target_account)
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      when :unblock
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        reflect_unblock!(account, target_account)
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      end
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    end
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  rescue Goldfinger::Error, HTTP::Error, OStatus2::BadSalmonError
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    nil
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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', xmlns: TagManager::XMLNS).nil? || xml.at_xpath('/xmlns:entry/xmlns:author/xmlns:uri', xmlns: TagManager::XMLNS).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"]', xmlns: TagManager::XMLNS).each { |mention_link| return true if mention_link.attribute('href').value == TagManager.instance.url_for(account) }
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    false
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  end
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  def verb(xml)
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    raw = xml.at_xpath('//activity:verb', activity: TagManager::AS_XMLNS).content
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    TagManager::VERBS.key(raw)
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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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    follow = account.follow!(target_account)
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    NotifyService.new.call(target_account, follow)
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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 reflect_block!(account, target_account)
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    UnfollowService.new.call(target_account, account) if target_account.following?(account)
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    account.block!(target_account)
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  end
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  def reflect_unblock!(account, target_account)
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    UnblockService.new.call(account, target_account)
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  end
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  def delete_post!(xml, account)
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    status = Status.find(xml.at_xpath('//xmlns:id', xmlns: TagManager::XMLNS).content)
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    return if status.nil?
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    remove_status_service.call(status) if account.id == status.account_id
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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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    favourite = current_status.favourites.where(account: from_account).first_or_create!(account: from_account)
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    NotifyService.new.call(current_status.account, favourite)
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  end
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  def add_post!(body, account)
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    process_feed_service.call(body, account)
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  end
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  def status(xml)
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    Status.find(TagManager.instance.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', activity: TagManager::AS_XMLNS).at_xpath('./xmlns:id', xmlns: TagManager::XMLNS).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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  def remove_status_service
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    @remove_status_service ||= RemoveStatusService.new
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  end
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end
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