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Contents
module Rubydora
# Provides class level methods for handling
# callback methods that alter object instances
module Callbacks
# add callback framework to base class
# @param [Class] base
def self.included(base)
base.extend ExtendableClassMethods
end
# hooks support
module ExtendableClassMethods
# creates the @hooks container ("hooks" are blocks or procs).
# returns an array
def hooks
@hooks ||= {}
end
# register callback procs
# @param [Array<Symbol>] hook name
def register_callback *attrs
attrs.each do |method_name|
next if methods.include? method_name.to_s
instance_eval %Q{
def #{method_name}(&blk)
self.hooks[:#{method_name}] ||= []
self.hooks[:#{method_name}] << blk
end
def clear_#{method_name}_blocks!
self.hooks[:#{method_name}] = []
end
}
class_eval %Q{
def call_#{method_name}
self.class.hooks[:#{method_name}] ||= []
self.class.hooks[:#{method_name}].each do |h|
instance_eval &h
end
end
}
end
end
end
end
end
Version data entries
70 entries across 70 versions & 1 rubygems