Class: Skyscraper::Node

Inherits:
Object
  • Object
show all
Defined in:
lib/skyscraper/node.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(element) ⇒ Node

Returns a new instance of Node.



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# File 'lib/skyscraper/node.rb', line 7

def initialize element
  @element = element
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(name) ⇒ Object 



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# File 'lib/skyscraper/node.rb', line 89

def method_missing name
  @element.attribute(name.to_s).to_s
end

Instance Attribute Details

#element ⇒ Object

Returns the value of attribute element.



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# File 'lib/skyscraper/node.rb', line 5

def element
  @element
end

Instance Method Details

#children(selector = nil) ⇒ Object 



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# File 'lib/skyscraper/node.rb', line 21

def children selector = nil
  if selector
    children = @element.css(selector)
  else
    children = @element.children
  end

  children.select do |element|
    element.parent == @element and element.is_a?(Nokogiri::XML::Element)
  end.map do |child|
    Node.new(child)
  end 
end

#class ⇒ Object 



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# File 'lib/skyscraper/node.rb', line 77

def class
  @element.attribute("class").to_s
end

#download(options = {}) ⇒ Object 



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# File 'lib/skyscraper/node.rb', line 81

def download options = {}
  Resource.new(self).download(options)
end

#find(selector) ⇒ Object 



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# File 'lib/skyscraper/node.rb', line 15

def find selector
  @element.css(selector).map do |element|
    Node.new(element)
  end
end

#first(selector) ⇒ Object 



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# File 'lib/skyscraper/node.rb', line 11

def first selector
  self.find(selector).first
end

#follow ⇒ Object 



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# File 'lib/skyscraper/node.rb', line 67

def follow 
  if self.href
    Skyscraper::fetch(self.uri)
  end
end

#have_parent? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/skyscraper/node.rb', line 41

def have_parent?
  self.parent.present? 
end

#html ⇒ Object 



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# File 'lib/skyscraper/node.rb', line 73

def html
  @element.children.to_html
end

#original_class ⇒ Object 



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# File 'lib/skyscraper/node.rb', line 3

alias :original_class :class

#parent ⇒ Object 



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# File 'lib/skyscraper/node.rb', line 35

def parent
  if @element.parent.is_a? Nokogiri::XML::Element
    Node.new @element.parent
  end
end

#parents(selector = nil) ⇒ Object 



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# File 'lib/skyscraper/node.rb', line 45

def parents selector = nil
  node = self
  parents = []

  while node.have_parent?
    node = node.parent
    parents << node
  end

  parents.select! do |item|
    item.element.matches? selector
  end if selector

  parents
end

#siblings ⇒ Object 



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# File 'lib/skyscraper/node.rb', line 61

def siblings
  self.parent.children.select do |node|
    node.element != self.element
  end
end

#submit(params = {}) ⇒ Object

Raises:



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# File 'lib/skyscraper/node.rb', line 101

def submit params = {}
  raise Skyscraper::LocalFormException if @element.document.path.local?
  raise Skyscraper::NotActionException if self.action.blank?

  path = @element.document.path.full_path_for(self.action)
  document  = Skyscraper::Document.load_post path, params

  Node.new(document.css("html"))
end

#tag ⇒ Object 



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# File 'lib/skyscraper/node.rb', line 97

def tag
  @element.name
end

#text ⇒ Object 



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# File 'lib/skyscraper/node.rb', line 93

def text
  @element.content.to_s.strip
end

#uri ⇒ Object 



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# File 'lib/skyscraper/node.rb', line 85

def uri
  @element.document.path.full_path_for(self.href)
end