Class: Hootenanny::Feed

Inherits:
Object
  • Object
show all
Defined in:
lib/hootenanny/feed.rb,
lib/hootenanny/errors.rb,
lib/hootenanny/feed/file.rb,
lib/hootenanny/feed/rss_feed.rb,
lib/hootenanny/feed/atom_feed.rb,
lib/hootenanny/feed/feed_item.rb,
lib/hootenanny/feed/json_feed.rb,
lib/hootenanny/feed/null_feed.rb,
lib/hootenanny/feed/digest_feed.rb,
lib/hootenanny/feed/rss_feed_item.rb,
lib/hootenanny/feed/atom_feed_item.rb,
lib/hootenanny/feed/json_feed_item.rb,
lib/hootenanny/feed/digest_feed_item.rb

Direct Known Subclasses

JSONFeed, NullFeed, RSSFeed

Defined Under Namespace

Classes: AtomFeed, AtomFeedItem, CombinationError, DigestFeed, DigestFeedItem, FeedItem, File, JSONFeed, JSONFeedItem, NullFeed, ParseError, RSSFeed, RSSFeedItem, UnknownContentTypeError

Constant Summary collapse

FEED_TYPE_MAPPINGS = 
{
  :rss    => 'RSS',
  :json   => 'JSON',
  :atom   => 'Atom',
  :digest => 'Digest',
  :''     => 'Null',
}

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.from_content(content) ⇒ Object 



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# File 'lib/hootenanny/feed.rb', line 27

def self.from_content(content)
  adapter = allocate

  adapter.send :content=, content

  adapter
end

.infer(content, options = {}) ⇒ Object 



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# File 'lib/hootenanny/feed.rb', line 19

def self.infer(content, options = {})
  type = options.fetch(:type).to_s.downcase.to_sym

  feed_class(type).from_content(content)
rescue KeyError => e
  raise ::Hootenanny::Feed::UnknownContentTypeError.wrap(e)
end

Instance Method Details

#+(other) ⇒ Object

Raises:



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# File 'lib/hootenanny/feed.rb', line 41

def +(other)
  raise Hootenanny::Feed::CombinationError unless self.class == other.class

  feed       = self.class.from_content(self.content)
  feed.items = (self.items + other.items).uniq
  feed
end

#-(other) ⇒ Object 



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# File 'lib/hootenanny/feed.rb', line 35

def -(other)
  feed       = self.class.from_content(self.content)
  feed.items = self.items - other.items
  feed
end

#empty? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/hootenanny/feed.rb', line 49

def empty?
  items.empty?
end

#to_digest_feed ⇒ Object 



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# File 'lib/hootenanny/feed.rb', line 53

def to_digest_feed
  feed = DigestFeed.from_content('{}')
  feed.items = self.items.map { |item| DigestFeedItem.new(item.to_digest) }
  feed
end

#type ⇒ Object 



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# File 'lib/hootenanny/feed.rb', line 59

def type
  self.class.name.match(/Hootenanny::Feed::(\w+)Feed/)[1].downcase.to_sym
end