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parsers.rb
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parsers.rb
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require 'feedzirra'
require 'set'
class Planet
class Parsers
@@parsers = Set.new
def self.add_parser(parser)
@@parsers << parser
end
def initialize
@types, @domains = {}, {}
@@parsers.each do |parser|
new_type, new_domains = parser.type, parser.domains
fail("duplicate type") if new_type and @types.has_key? new_type
fail("overlapping domains") unless (@domains.keys & new_domains).empty?
@types[new_type] = parser if new_type
new_domains.each do |new_domain|
@domains[new_domain] = parser
end
end
end
def get_parser(type)
begin
return @types.fetch(type)
rescue KeyError => e
raise(ArgumentError, "No parser for type '#{ type }'", caller)
end
end
def get_parser_for(feed)
feed_domain = URI(feed).host
@domains.each do |domain, parser|
return parser if feed_domain.end_with? domain
end
return Feedzirra::Feed # default generic parser
end
end
end
# load parsers
dirname = File.join([File.dirname(__FILE__), 'parsers'])
Dir.open(dirname).each do |filename|
require "#{dirname}/#{filename}" if filename.end_with? '.rb'
end