Class: Hollaback::Chain

Inherits:
Object
  • Object
show all
Defined in:
lib/hollaback/chain.rb

Overview

A set of callbacks

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Chain

Returns a new instance of Chain.



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# File 'lib/hollaback/chain.rb', line 8

def initialize
  @callbacks = []
end

Instance Attribute Details

#callbacks ⇒ Object (readonly)

Returns the value of attribute callbacks.



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# File 'lib/hollaback/chain.rb', line 6

def callbacks
  @callbacks
end

Instance Method Details

#+(other) ⇒ Object 



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# File 'lib/hollaback/chain.rb', line 12

def +(other)
  @callbacks += other.callbacks
  self
end

#after(execute = nil, &block) ⇒ Object 



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# File 'lib/hollaback/chain.rb', line 21

def after(execute = nil, &block)
  build(:after, execute, &block)
end

#around(execute = nil, &block) ⇒ Object 



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# File 'lib/hollaback/chain.rb', line 25

def around(execute = nil, &block)
  build(:around, execute, &block)
end

#before(execute = nil, &block) ⇒ Object 



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# File 'lib/hollaback/chain.rb', line 17

def before(execute = nil, &block)
  build(:before, execute, &block)
end

#compile(&block) ⇒ Object 



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# File 'lib/hollaback/chain.rb', line 33

def compile(&block)
  if empty?
    block
  else
    callbacks.inject(Sequence.new(&block)) do |sequence, callback|
      sequence.send(callback.type, &callback.build)
    end
  end
end

#empty? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/hollaback/chain.rb', line 29

def empty?
  callbacks.empty?
end