Class: Scraping::Rules::Element

Inherits:
Object
  • Object
show all
Defined in:
lib/scraping/rules/element.rb

Direct Known Subclasses

Elements

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name, selector, options = {}, &extract) ⇒ Element

Returns a new instance of Element.



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# File 'lib/scraping/rules/element.rb', line 6

def initialize(name, selector, options = {}, &extract)
  @name = name
  @selector = selector
  @options = options
  @extract = extract if block_given?
end

Instance Attribute Details

#extract ⇒ Object (readonly)

Returns the value of attribute extract.



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# File 'lib/scraping/rules/element.rb', line 4

def extract
  @extract
end

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/scraping/rules/element.rb', line 4

def name
  @name
end

#options ⇒ Object (readonly)

Returns the value of attribute options.



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# File 'lib/scraping/rules/element.rb', line 4

def options
  @options
end

#selector ⇒ Object (readonly)

Returns the value of attribute selector.



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# File 'lib/scraping/rules/element.rb', line 4

def selector
  @selector
end

Instance Method Details

#call(scraper, node) ⇒ Object 



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# File 'lib/scraping/rules/element.rb', line 13

def call(scraper, node)
  item = node.at(selector)

  if item && options[:as]
    scraper.send("extract_#{options[:as]}", item)
  elsif item && extract
    scraper.instance_exec(item, &extract)
  elsif item
    item.text
  end
end