# frozen_string_literal: false

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# This file contains the implementation of trackbacks. It is entirely internal

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# and not useful to outside developers.

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require 'rss/1.0'

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require 'rss/2.0'

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module RSS # :nodoc: all

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TRACKBACK_PREFIX = 'trackback'

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TRACKBACK_URI = 'http://madskills.com/public/xml/rss/module/trackback/'

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RDF.install_ns(TRACKBACK_PREFIX, TRACKBACK_URI)

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Rss.install_ns(TRACKBACK_PREFIX, TRACKBACK_URI)

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module TrackBackUtils

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private

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def trackback_validate(ignore_unknown_element, tags, uri)

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return if tags.nil?

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if tags.find {|tag| tag == "about"} and

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!tags.find {|tag| tag == "ping"}

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raise MissingTagError.new("#{TRACKBACK_PREFIX}:ping", tag_name)

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end

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end

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end

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module BaseTrackBackModel

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ELEMENTS = %w(ping about)

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def append_features(klass)

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super

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unless klass.class == Module

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klass.module_eval {include TrackBackUtils}

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klass.install_must_call_validator(TRACKBACK_PREFIX, TRACKBACK_URI)

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%w(ping).each do |name|

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var_name = "#{TRACKBACK_PREFIX}_#{name}"

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klass_name = "TrackBack#{Utils.to_class_name(name)}"

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klass.install_have_child_element(name, TRACKBACK_URI, "?", var_name)

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klass.module_eval(<<-EOC, __FILE__, __LINE__)

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remove_method :#{var_name}

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def #{var_name}

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@#{var_name} and @#{var_name}.value

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end

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remove_method :#{var_name}=

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def #{var_name}=(value)

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@#{var_name} = Utils.new_with_value_if_need(#{klass_name}, value)

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end

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EOC

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end

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[%w(about s)].each do |name, postfix|

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var_name = "#{TRACKBACK_PREFIX}_#{name}"

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klass_name = "TrackBack#{Utils.to_class_name(name)}"

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klass.install_have_children_element(name, TRACKBACK_URI, "*",

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var_name)

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klass.module_eval(<<-EOC, __FILE__, __LINE__)

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remove_method :#{var_name}

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def #{var_name}(*args)

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if args.empty?

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@#{var_name}.first and @#{var_name}.first.value

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else

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ret = @#{var_name}.__send__("[]", *args)

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if ret.is_a?(Array)

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ret.collect {|x| x.value}

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else

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ret.value

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end

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end

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end

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remove_method :#{var_name}=

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remove_method :set_#{var_name}

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def #{var_name}=(*args)

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if args.size == 1

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item = Utils.new_with_value_if_need(#{klass_name}, args[0])

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@#{var_name}.push(item)

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else

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new_val = args.last

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if new_val.is_a?(Array)

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new_val = new_value.collect do |val|

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Utils.new_with_value_if_need(#{klass_name}, val)

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end

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else

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new_val = Utils.new_with_value_if_need(#{klass_name}, new_val)

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end

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@#{var_name}.__send__("[]=", *(args[0..-2] + [new_val]))

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end

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end

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alias set_#{var_name} #{var_name}=

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EOC

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end

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end

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end

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end

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module TrackBackModel10

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extend BaseModel

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extend BaseTrackBackModel

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class TrackBackPing < Element

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include RSS10

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class << self

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def required_prefix

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TRACKBACK_PREFIX

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end

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def required_uri

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TRACKBACK_URI

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end

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end

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@tag_name = "ping"

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[

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["resource", ::RSS::RDF::URI, true]

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].each do |name, uri, required|

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install_get_attribute(name, uri, required, nil, nil,

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"#{::RSS::RDF::PREFIX}:#{name}")

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end

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alias_method(:value, :resource)

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alias_method(:value=, :resource=)

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def initialize(*args)

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if Utils.element_initialize_arguments?(args)

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super

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else

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super()

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self.resource = args[0]

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end

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end

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def full_name

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tag_name_with_prefix(TRACKBACK_PREFIX)

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end

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end

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class TrackBackAbout < Element

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include RSS10

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class << self

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def required_prefix

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TRACKBACK_PREFIX

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end

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def required_uri

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TRACKBACK_URI

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end

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end

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@tag_name = "about"

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[

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["resource", ::RSS::RDF::URI, true]

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].each do |name, uri, required|

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install_get_attribute(name, uri, required, nil, nil,

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"#{::RSS::RDF::PREFIX}:#{name}")

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end

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alias_method(:value, :resource)

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alias_method(:value=, :resource=)

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def initialize(*args)

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if Utils.element_initialize_arguments?(args)

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super

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else

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super()

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self.resource = args[0]

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end

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end

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def full_name

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tag_name_with_prefix(TRACKBACK_PREFIX)

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end

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private

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def maker_target(abouts)

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abouts.new_about

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end

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def setup_maker_attributes(about)

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about.resource = self.resource

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end

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end

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end

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module TrackBackModel20

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extend BaseModel

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extend BaseTrackBackModel

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class TrackBackPing < Element

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include RSS09

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@tag_name = "ping"

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content_setup

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class << self

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def required_prefix

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TRACKBACK_PREFIX

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end

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def required_uri

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TRACKBACK_URI

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end

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end

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alias_method(:value, :content)

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alias_method(:value=, :content=)

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def initialize(*args)

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if Utils.element_initialize_arguments?(args)

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super

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else

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super()

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self.content = args[0]

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end

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end

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def full_name

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tag_name_with_prefix(TRACKBACK_PREFIX)

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end

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end

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class TrackBackAbout < Element

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include RSS09

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@tag_name = "about"

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content_setup

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class << self

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def required_prefix

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TRACKBACK_PREFIX

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end

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def required_uri

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TRACKBACK_URI

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end

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end

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alias_method(:value, :content)

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alias_method(:value=, :content=)

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def initialize(*args)

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if Utils.element_initialize_arguments?(args)

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super

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else

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super()

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self.content = args[0]

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end

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end

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def full_name

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tag_name_with_prefix(TRACKBACK_PREFIX)

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end

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end

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end

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class RDF

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class Item; include TrackBackModel10; end

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end

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class Rss

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class Channel

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class Item; include TrackBackModel20; end

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end

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end

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BaseTrackBackModel::ELEMENTS.each do |name|

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class_name = Utils.to_class_name(name)

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BaseListener.install_class_name(TRACKBACK_URI, name,

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"TrackBack#{class_name}")

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end

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BaseTrackBackModel::ELEMENTS.collect! {|name| "#{TRACKBACK_PREFIX}_#{name}"}

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end

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