Class: HashWalker::Walker

Inherits:
Object
  • Object
show all
Defined in:
lib/hash_walker/walker.rb

Instance Method Summary collapse

Constructor Details

#initialize(options) ⇒ Walker 



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# File 'lib/hash_walker/walker.rb', line 4

def initialize(options)
  @hash_fragment = options[:hash]
  @hash_fragment = @hash_fragment.with_indifferent_access if @hash_fragment.is_a? Hash
  @block = options[:block]
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(*args, &block) ⇒ Object 



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# File 'lib/hash_walker/walker.rb', line 33

def method_missing(*args,&block)
  @attribute_name = args[0]
  @block = block

  take_one_step
end

Instance Method Details

#get_stepper ⇒ Object 



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# File 'lib/hash_walker/walker.rb', line 22

def get_stepper
  next_step_is_array? ? Stepper::Array : Stepper::Hash
end

#next_step_is_array? ⇒ Boolean 



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# File 'lib/hash_walker/walker.rb', line 18

def next_step_is_array?
  (@hash_fragment.is_a?(Hash) && value.is_a?(Array))
end

#take_one_step ⇒ Object 



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# File 'lib/hash_walker/walker.rb', line 26

def take_one_step
  stepper = get_stepper.new
  stepper.hash_fragment = value
  stepper.block = @block
  stepper.step!
end

#value ⇒ Object 



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# File 'lib/hash_walker/walker.rb', line 14

def value
  @hash_fragment.respond_to?('keys') && @hash_fragment[@attribute_name]
end

#walk! ⇒ Object 



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# File 'lib/hash_walker/walker.rb', line 10

def walk!
  instance_eval(&@block)
end