Class: Valise::MergeDiff::HashMerge

Inherits:
Valise::MergeDiff show all
Defined in:
lib/valise/stack.rb

Instance Method Summary collapse

Methods inherited from Valise::MergeDiff

[], #initialize, register

Constructor Details

This class inherits a constructor from Valise::MergeDiff

Instance Method Details

#deep_merge(collect, item) ⇒ Object 



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# File 'lib/valise/stack.rb', line 94

def deep_merge(collect, item)
  item.each_pair do |key, value|
    case value
    when Hash
      collect[key] ||= {}
      deep_merge(collect[key], value)
    else
      collect[key] = value
    end
  end
  collect
end

#diff(item, new_contents) ⇒ Object 



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# File 'lib/valise/stack.rb', line 107

def diff(item, new_contents)
  diff_with = merge_stack(@stack.below(item).reverse)
  result = new_contents.dup

  diff_with.each_pair do |key, value|
    if result.has_key?(key)
      if result[key] == value
        result.delete(key)
      end
    else
      result[key] = nil
    end
  end

  result
end

#merge(item) ⇒ Object 



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# File 'lib/valise/stack.rb', line 84

def merge(item)
  merge_stack(@stack.not_above(item).reverse)
end

#merge_stack(stack) ⇒ Object 



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# File 'lib/valise/stack.rb', line 88

def merge_stack(stack)
  stack.present.inject({}) do |hash, item|
    deep_merge(hash, item.load_contents)
  end
end