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require 'rss/1.0'
require 'rss/2.0'
module RSS
TRACKBACK_PREFIX = 'trackback'
TRACKBACK_URI = 'http://madskills.com/public/xml/rss/module/trackback/'
RDF.install_ns(TRACKBACK_PREFIX, TRACKBACK_URI)
Rss.install_ns(TRACKBACK_PREFIX, TRACKBACK_URI)
module TrackBackUtils
private
def trackback_validate(tags)
counter = {}
%w(ping about).each do |name|
counter["#{TRACKBACK_PREFIX}_#{name}"] = 0
end
tags.each do |tag|
key = "#{TRACKBACK_PREFIX}_#{tag}"
raise UnknownTagError.new(tag, TRACKBACK_URI) unless counter.has_key?(key)
counter[key] += 1
if tag != "about" and counter[key] > 1
raise TooMuchTagError.new(tag, tag_name)
end
end
if counter["#{TRACKBACK_PREFIX}_ping"].zero? and
counter["#{TRACKBACK_PREFIX}_about"].nonzero?
raise MissingTagError.new("#{TRACKBACK_PREFIX}:ping", tag_name)
end
end
end
module BaseTrackBackModel
def append_features(klass)
super
unless klass.class == Module
klass.module_eval {include TrackBackUtils}
%w(ping).each do |name|
var_name = "#{TRACKBACK_PREFIX}_#{name}"
klass_name = name.capitalize
klass.install_have_child_element(var_name)
klass.module_eval(<<-EOC, __FILE__, __LINE__)
remove_method :#{var_name}
def #{var_name}
@#{var_name} and @#{var_name}.value
end
remove_method :#{var_name}=
def #{var_name}=(value)
@#{var_name} = Utils.new_with_value_if_need(#{klass_name}, value)
end
EOC
end
[%w(about s)].each do |name, postfix|
var_name = "#{TRACKBACK_PREFIX}_#{name}"
klass_name = name.capitalize
klass.install_have_children_element(var_name)
klass.module_eval(<<-EOC, __FILE__, __LINE__)
remove_method :#{var_name}
def #{var_name}(*args)
if args.empty?
@#{var_name}.first and @#{var_name}.first.value
else
ret = @#{var_name}.send("[]", *args)
if ret.is_a?(Array)
ret.collect {|x| x.value}
else
ret.value
end
end
end
remove_method :#{var_name}=
remove_method :set_#{var_name}
def #{var_name}=(*args)
if args.size == 1
item = Utils.new_with_value_if_need(#{klass_name}, args[0])
@#{var_name}.push(item)
else
new_val = args.last
if new_val.is_a?(Array)
new_val = new_value.collect do |val|
Utils.new_with_value_if_need(#{klass_name}, val)
end
else
new_val = Utils.new_with_value_if_need(#{klass_name}, new_val)
end
@#{var_name}.send("[]=", *(args[0..-2] + [new_val]))
end
end
alias set_#{var_name} #{var_name}=
EOC
end
end
end
end
module TrackBackModel10
extend BaseModel
extend BaseTrackBackModel
class Ping < Element
include RSS10
class << self
def required_prefix
TRACKBACK_PREFIX
end
def required_uri
TRACKBACK_URI
end
end
[
["resource", ::RSS::RDF::URI, true]
].each do |name, uri, required|
install_get_attribute(name, uri, required)
end
alias_method(:value, :resource)
alias_method(:value=, :resource=)
def initialize(resource=nil)
super()
@resource = resource
end
def full_name
tag_name_with_prefix(TRACKBACK_PREFIX)
end
def to_s(need_convert=true, indent=calc_indent)
rv = tag(indent)
rv = convert(rv) if need_convert
rv
end
private
def _attrs
[
["#{::RSS::RDF::PREFIX}:resource", true, "resource"],
]
end
end
class About < Element
include RSS10
class << self
def required_prefix
TRACKBACK_PREFIX
end
def required_uri
TRACKBACK_URI
end
end
[
["resource", ::RSS::RDF::URI, true]
].each do |name, uri, required|
install_get_attribute(name, uri, required)
end
alias_method(:value, :resource)
alias_method(:value=, :resource=)
def initialize(resource=nil)
super()
@resource = resource
end
def full_name
tag_name_with_prefix(TRACKBACK_PREFIX)
end
def to_s(need_convert=true, indent=calc_indent)
rv = tag(indent)
rv = convert(rv) if need_convert
rv
end
private
def _attrs
[
["#{::RSS::RDF::PREFIX}:resource", true, "resource"],
]
end
def maker_target(abouts)
abouts.new_about
end
def setup_maker_attributes(about)
about.resource = self.resource
end
end
end
module TrackBackModel20
extend BaseModel
extend BaseTrackBackModel
class Ping < Element
include RSS09
content_setup
class << self
def required_prefix
TRACKBACK_PREFIX
end
def required_uri
TRACKBACK_URI
end
end
alias_method(:value, :content)
alias_method(:value=, :content=)
def initialize(content=nil)
super()
@content = content
end
def full_name
tag_name_with_prefix(TRACKBACK_PREFIX)
end
end
class About < Element
include RSS09
content_setup
class << self
def required_prefix
TRACKBACK_PREFIX
end
def required_uri
TRACKBACK_URI
end
end
alias_method(:value, :content)
alias_method(:value=, :content=)
def initialize(content=nil)
super()
@content = content
end
def full_name
tag_name_with_prefix(TRACKBACK_PREFIX)
end
end
end
class RDF
class Item; include TrackBackModel10; end
end
class Rss
class Channel
class Item; include TrackBackModel20; end
end
end
end
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