Class: Graft::Xml::Attribute

Inherits:
Object
  • Object
show all
Defined in:
lib/graft/xml/attribute.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name, type = :string, sources = nil) ⇒ Attribute

Returns a new instance of Attribute.



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# File 'lib/graft/xml/attribute.rb', line 9

def initialize(name, type = :string, sources = nil)
  @name = name.to_sym
  @type = type

  @sources = Array(sources)
  @sources << @name.to_s if @sources.empty?
end

Instance Attribute Details

#name ⇒ Object (readonly)

TODO: Refactor the location / attribute logic into a Source class



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# File 'lib/graft/xml/attribute.rb', line 7

def name
  @name
end

#sources ⇒ Object (readonly)

TODO: Refactor the location / attribute logic into a Source class



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# File 'lib/graft/xml/attribute.rb', line 7

def sources
  @sources
end

Instance Method Details

#attribute(source) ⇒ Object 



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# File 'lib/graft/xml/attribute.rb', line 32

def attribute(source)
  location, attribute = source.split('@')
  attribute || location
end

#location(source) ⇒ Object 



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# File 'lib/graft/xml/attribute.rb', line 37

def location(source)
  split(source).first
end

#node_for(document, source) ⇒ Object 



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# File 'lib/graft/xml/attribute.rb', line 28

def node_for(document, source)
  document.at(location(source)) || document.search("//[@#{attribute(source)}]").first
end

#split(source) ⇒ Object 



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# File 'lib/graft/xml/attribute.rb', line 21

def split(source)
  location, attribute = source.split('@')
  location = self.name.to_s if location.blank?

  [location, attribute]
end

#type_class ⇒ Object 



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# File 'lib/graft/xml/attribute.rb', line 17

def type_class
  "Graft::Xml::Type::#{@type.to_s.camelize}".constantize
end

#value_from(document) ⇒ Object 



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# File 'lib/graft/xml/attribute.rb', line 41

def value_from(document)
  values = sources.map do |source|
    node = node_for(document, source)
    if !node.nil?
      possible_values = [node.attributes[attribute(source)], node.inner_text]
      possible_values.detect {|value| !value.blank? }
    end
  end

  type_class.new(values.compact.first).value
end