Class: Mailman::Middleware

Inherits:
Object
  • Object
show all
Defined in:
lib/mailman/middleware.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize {|_self| ... } ⇒ Middleware

Returns a new instance of Middleware.

Yields:

  • (_self)

Yield Parameters:



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# File 'lib/mailman/middleware.rb', line 5

def initialize
  @entries = []
  yield self if block_given?
end

Instance Attribute Details

#entries ⇒ Object (readonly)

Returns the value of attribute entries.



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# File 'lib/mailman/middleware.rb', line 3

def entries
  @entries
end

Instance Method Details

#add(klass) ⇒ Object 



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# File 'lib/mailman/middleware.rb', line 10

def add(klass)
  entries << klass
end

#each(&block) ⇒ Object 



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# File 'lib/mailman/middleware.rb', line 43

def each(&block)
  entries.each(&block)
end

#insert_after(oldklass, newklass) ⇒ Object 



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# File 'lib/mailman/middleware.rb', line 23

def insert_after(oldklass, newklass)
  idx = entries.rindex(oldklass) || entries.count - 1
  entries.insert(idx+1, newklass)
end

#insert_before(oldklass, newklass) ⇒ Object 



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# File 'lib/mailman/middleware.rb', line 18

def insert_before(oldklass, newklass)
  idx = entries.index(oldklass) || 0
  entries.insert(idx, newklass)
end

#remove(klass) ⇒ Object 



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# File 'lib/mailman/middleware.rb', line 14

def remove(klass)
  entries.delete(klass)
end

#run(*args, &final_action) ⇒ Object 



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# File 'lib/mailman/middleware.rb', line 28

def run(*args, &final_action)
  final_return = nil
  stack = @entries.map {|m| m.new}
  traverse_stack = lambda do
    if stack.empty?
      final_return = final_action.call
    else
      stack.shift.call(*args, &traverse_stack)
    end
  end
  traverse_stack.call

  final_return
end