# frozen_string_literal: false

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require_relative "utils"

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module RSS

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module XMLStyleSheetMixin

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attr_accessor :xml_stylesheets

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def initialize(*args)

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super

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@xml_stylesheets = []

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end

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private

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def xml_stylesheet_pi

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xsss = @xml_stylesheets.collect do |xss|

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pi = xss.to_s

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pi = nil if /\A\s*\z/ =~ pi

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pi

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end.compact

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xsss.push("") unless xsss.empty?

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xsss.join("\n")

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end

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end

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class XMLStyleSheet

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include Utils

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ATTRIBUTES = %w(href type title media charset alternate)

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GUESS_TABLE = {

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"xsl" => "text/xsl",

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"css" => "text/css",

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}

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attr_accessor(*ATTRIBUTES)

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attr_accessor(:do_validate)

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def initialize(*attrs)

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if attrs.size == 1 and

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(attrs.first.is_a?(Hash) or attrs.first.is_a?(Array))

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attrs = attrs.first

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end

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@do_validate = true

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ATTRIBUTES.each do |attr|

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__send__("#{attr}=", nil)

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end

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vars = ATTRIBUTES.dup

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vars.unshift(:do_validate)

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attrs.each do |name, value|

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if vars.include?(name.to_s)

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__send__("#{name}=", value)

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end

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end

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end

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def to_s

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rv = ""

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if @href

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rv << %Q[<?xml-stylesheet]

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ATTRIBUTES.each do |name|

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if __send__(name)

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rv << %Q[ #{name}="#{h __send__(name)}"]

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end

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end

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rv << %Q[?>]

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end

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rv

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end

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remove_method(:href=)

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def href=(value)

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@href = value

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if @href and @type.nil?

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@type = guess_type(@href)

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end

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@href

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end

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remove_method(:alternate=)

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def alternate=(value)

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if value.nil? or /\A(?:yes|no)\z/ =~ value

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@alternate = value

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else

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if @do_validate

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args = ["?xml-stylesheet?", %Q[alternate="#{value}"]]

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raise NotAvailableValueError.new(*args)

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end

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end

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@alternate

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end

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def setup_maker(maker)

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xss = maker.xml_stylesheets.new_xml_stylesheet

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ATTRIBUTES.each do |attr|

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xss.__send__("#{attr}=", __send__(attr))

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end

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end

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private

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def guess_type(filename)

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/\.([^.]+)$/ =~ filename

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GUESS_TABLE[$1]

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end

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end

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end

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