Class: Diffbot::Frontpage::DmlParser

Inherits:
Object
  • Object
show all
Defined in:
lib/diffbot/frontpage/dml_parser.rb

Overview

Parser that takes the XML generated from Diffbot’s Frontpage API call and returns a hash suitable for Diffbot::Frontpage.

Defined Under Namespace

Classes: ItemParser

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(node) ⇒ DmlParser

Initialize the parser with a DML node.

dml - The root XML::Element



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# File 'lib/diffbot/frontpage/dml_parser.rb', line 19

def initialize(node)
  @dml = node
end

Instance Attribute Details

#dml ⇒ Object (readonly)

The root element of the DML document.



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# File 'lib/diffbot/frontpage/dml_parser.rb', line 24

def dml
  @dml
end

Class Method Details

.parse(dml) ⇒ Object

Take the string of DML and convert it into a nice little hash we can pass to Diffbot::Frontpage.

dml - A string of DML.

Returns a Hash.



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# File 'lib/diffbot/frontpage/dml_parser.rb', line 10

def self.parse(dml)
  node = Nokogiri(dml).root
  parser = new(node)
  parser.parse
end

Instance Method Details

#extract_text(node, selector) ⇒ Object 



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# File 'lib/diffbot/frontpage/dml_parser.rb', line 47

def extract_text(node, selector)
  tag = node % selector
  tag && tag.text
end

#parse ⇒ Object

Parses the Diffbot Markup Language and generates a Hash that we can pass to Frontpage.new.

Returns a Hash.



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# File 'lib/diffbot/frontpage/dml_parser.rb', line 30

def parse
  attrs = {}

  info = dml % "info"
  attrs["title"]      = extract_text(info, "title")
  attrs["icon"]       = extract_text(info, "icon")
  attrs["sourceType"] = extract_text(info, "sourceType")
  attrs["sourceURL"]  = extract_text(info, "sourceURL")

  items = dml / "item"
  attrs["items"] = items.map do |item|
    ItemParser.new(item).parse
  end

  attrs
end