module ReactiveRecord class Broadcast def self.after_commit(operation, model) Hyperloop::InternalPolicy.regulate_broadcast(model) do |data| if !Hyperloop.on_server? && Hyperloop::Connection.root_path send_to_server(operation, data) else SendPacket.run(data, operation: operation) end end rescue ActiveRecord::StatementInvalid => e raise e unless e.message == "Could not find table 'hyperloop_connections'" end unless RUBY_ENGINE == 'opal' def self.send_to_server(operation, data) salt = SecureRandom.hex authorization = Hyperloop.authorization(salt, data[:channel], data[:broadcast_id]) raise 'no server running' unless Hyperloop::Connection.root_path SendPacket.remote( Hyperloop::Connection.root_path, data, operation: operation, salt: salt, authorization: authorization ) end unless RUBY_ENGINE == 'opal' class SendPacket < Hyperloop::ServerOp param authorization: nil, nils: true param salt: nil param :operation param :broadcast_id param :channel param :channels param :klass param :record param :operation param :previous_changes unless RUBY_ENGINE == 'opal' validate do params.authorization.nil? || Hyperloop.authorization( params.salt, params.channel, params.broadcast_id ) == params.authorization end dispatch_to { params.channel } end end SendPacket.on_dispatch do |params| in_transit[params.broadcast_id].receive(params) do |broadcast| if params.operation == :destroy ReactiveRecord::Collection.sync_scopes broadcast else ReactiveRecord::Base.when_not_saving(broadcast.klass) do ReactiveRecord::Collection.sync_scopes broadcast end end end end def self.to_self(record, data = {}) # simulate incoming packet after a local save operation = if record.new? :create elsif record.destroyed? :destroy else :change end dummy_broadcast = new.local(operation, record, data) record.backing_record.sync! data unless operation == :destroy ReactiveRecord::Collection.sync_scopes dummy_broadcast end def record_with_current_values ReactiveRecord::Base.load_data do backing_record = @backing_record || klass.find(record[:id]).backing_record if destroyed? backing_record.ar_instance else merge_current_values(backing_record) end end end def record_with_new_values klass._react_param_conversion(record).tap do |ar_instance| if destroyed? ar_instance.backing_record.destroy_associations elsif new? ar_instance.backing_record.initialize_collections end end end def new? @is_new end def destroyed? @destroyed end def klass Object.const_get(@klass) end def to_s "klass: #{klass} record: #{record} new?: #{new?} destroyed?: #{destroyed?}" end # private attr_reader :record def self.open_channels @open_channels ||= Set.new end def self.in_transit @in_transit ||= Hash.new { |h, k| h[k] = new(k) } end def initialize(id) @id = id @received = Set.new @record = {} @previous_changes = {} end def local(operation, record, data) @destroyed = operation == :destroy @is_new = operation == :create @klass = record.class.name @record = data record.backing_record.destroyed = false @record.merge!(id: record.id) if record.id record.backing_record.destroyed = @destroyed @backing_record = record.backing_record attributes = record.backing_record.attributes data.each do |k, v| next if klass.reflect_on_association(k) || attributes[k] == v @previous_changes[k] = [attributes[k], v] end self end def receive(params) @destroyed = params.operation == :destroy @is_new = params.operation == :create @channels ||= Hyperloop::IncomingBroadcast.open_channels.intersection params.channels #raise 'synchromesh security violation' unless @channels.include? params.channels @received << params.channel @klass ||= params.klass @record.merge! params.record @previous_changes.merge! params.previous_changes @backing_record = ReactiveRecord::Base.exists?(klass, params.record[:id]) yield complete! if @channels == @received end def complete! self.class.in_transit.delete @id end def merge_current_values(br) current_values = Hash[*@previous_changes.collect do |attr, values| value = attr == :id ? record[:id] : values.first if br.attributes.key?(attr) && br.attributes[attr] != br.convert(attr, value) && br.attributes[attr] != br.convert(attr, values.last) puts "warning #{attr} has changed locally - will force a reload.\n"\ "local value: #{br.attributes[attr]} remote value: #{br.convert(attr, value)}->#{br.convert(attr, values.last)}" return nil end [attr, value] end.compact.flatten].merge(br.attributes) klass._react_param_conversion(current_values) end end end