Class: RubyCheerio

Inherits:
Object
  • Object
show all
Defined in:
lib/ruby-cheerio.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(html = nil) ⇒ RubyCheerio

This method defines the instance of a RubyCheerio object with attributes like text, html and if an argument is not passed, it throws an ArgumentError



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# File 'lib/ruby-cheerio.rb', line 15

def initialize html=nil
  if valid_args? html
    if html.instance_of? Nokogiri::HTML::Document
      @html_nokogiri = html
    elsif html.instance_of? String and !html.empty?
      html = html.strip
      @html_nokogiri = Nokogiri::HTML(html)
    end
    @text = @html_nokogiri.text 
    @html = Nokogiri::HTML(@html_nokogiri.to_html).css('body').inner_html
  end
end

Instance Attribute Details

#html ⇒ Object

This creates an attribute readers and writers needed for the instance variables.



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# File 'lib/ruby-cheerio.rb', line 10

def html
  @html
end

#text ⇒ Object

This creates an attribute readers and writers needed for the instance variables.



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# File 'lib/ruby-cheerio.rb', line 10

def text
  @text
end

Instance Method Details

#find(selector = nil) ⇒ Object

This method can find an element using element-name, class-name, id-name or all together. This works like finding elements using jQuery styled selectors.



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# File 'lib/ruby-cheerio.rb', line 31

def find selector=nil
  if valid_args? selector
    elements_list = @html_nokogiri.css(selector).to_a.map{|e| self.class.new(e.to_html)}
    if !elements_list.nil?
      return elements_list
    else
      return nil
    end
  end
end

#prop(selector, attribute) ⇒ Object

This method can return the property of an element, which is selected using the selector being passed.



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# File 'lib/ruby-cheerio.rb', line 45

def prop(selector, attribute)
  if valid_args?(selector, attribute)
    element = @html_nokogiri.css(selector)
    if element.instance_of? Nokogiri::XML::NodeSet
      return element[0][attribute]
    elsif element.instance_of? Nokogiri::XML::Element
      return element[attribute]
    else
      return nil
    end
  end
end