/
aggregate_root.rb
62 lines (51 loc) · 1.3 KB
/
aggregate_root.rb
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require 'aggregate_root/version'
require 'aggregate_root/configuration'
require 'aggregate_root/transform'
require 'aggregate_root/default_apply_strategy'
require 'aggregate_root/repository'
module AggregateRoot
module ClassMethods
def on(*event_klasses, &block)
event_klasses.each do |event_klass|
name = event_klass.name || raise(ArgumentError, "Anonymous class is missing name")
handler_name = "on_#{name}"
define_method(handler_name, &block)
@on_methods ||= {}
@on_methods[name]=handler_name
private(handler_name)
end
end
def on_methods
ancestors.
select{|k| k.instance_variables.include?(:@on_methods)}.
map{|k| k.instance_variable_get(:@on_methods) }.
inject({}, &:merge)
end
end
def self.included(host_class)
host_class.extend(ClassMethods)
end
def apply(*events)
events.each do |event|
apply_strategy.(self, event)
unpublished << event
end
end
def version
@version ||= -1
end
def version=(value)
@unpublished_events = nil
@version = value
end
def unpublished_events
unpublished.each
end
private
def unpublished
@unpublished_events ||= []
end
def apply_strategy
DefaultApplyStrategy.new(on_methods: self.class.on_methods)
end
end