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whippy-edition/app/services/process_interaction_service.rb

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