Class: Arclight::HashAbsoluteXpath

Inherits:
Object
  • Object
show all
Defined in:
lib/arclight/hash_absolute_xpath.rb

Overview

Take a Nokogiri node and get its absolute path (inserting our own indexes for component levels) and hash that outout. This is intended as a potential strategy for handling missing IDs in EADs.

Constant Summary collapse

COMPONENT_NODE_NAME_REGEX = 
/^c\d{,2}$/

Class Attribute Summary collapse

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(node) ⇒ HashAbsoluteXpath

Returns a new instance of HashAbsoluteXpath.



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# File 'lib/arclight/hash_absolute_xpath.rb', line 23

def initialize(node)
  @node = node
end

Class Attribute Details

.hash_algorithm ⇒ Object 



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# File 'lib/arclight/hash_absolute_xpath.rb', line 13

def hash_algorithm
  return Digest::SHA1 unless defined? @hash_algorithm

  @hash_algorithm
end

Instance Attribute Details

#node ⇒ Object (readonly)

Returns the value of attribute node.



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# File 'lib/arclight/hash_absolute_xpath.rb', line 21

def node
  @node
end

Instance Method Details

#absolute_xpath ⇒ Object 



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# File 'lib/arclight/hash_absolute_xpath.rb', line 31

def absolute_xpath
  ancestor_tree = node.ancestors.map do |ancestor|
    ancestor_name_and_index(ancestor)
  end

  "#{[ancestor_tree.reverse, node.name].flatten.join('/')}#{current_index}"
end

#to_hexdigest ⇒ Object 



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# File 'lib/arclight/hash_absolute_xpath.rb', line 27

def to_hexdigest
  self.class.hash_algorithm.hexdigest(absolute_xpath).prepend('al_')
end