Class: Rbuzz::Feed

Inherits:
Object
  • Object
show all
Defined in:
lib/rbuzz/feed.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(feed_url, options = {}) ⇒ Feed

Returns a new instance of Feed.



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# File 'lib/rbuzz/feed.rb', line 8

def initialize(feed_url, options = {})
  @feed_url = feed_url
end

Instance Attribute Details

#atom_feed ⇒ Object (readonly)

Returns the value of attribute atom_feed.



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# File 'lib/rbuzz/feed.rb', line 6

def atom_feed
  @atom_feed
end

#feed_url ⇒ Object (readonly)

Returns the value of attribute feed_url.



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# File 'lib/rbuzz/feed.rb', line 5

def feed_url
  @feed_url
end

Class Method Details

.discover(profile_name) ⇒ Object

Extract the feed url from the users’s google profile name



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

def self.discover(profile_name)
  self.discover_by_url "http://www.google.com/profiles/#{profile_name}"
end

.discover_by_email(email) ⇒ Object

Extract the feed url from the users’s e-mail using the webfinger protocol



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# File 'lib/rbuzz/feed.rb', line 24

def self.discover_by_email(email)
  resource = Net::HTTP.get(URI.parse("http://www.google.com/s2/webfinger/?q=acct:#{email}"))
  begin
    doc = XML::Document.string(resource)
  rescue XML::Error => e
    raise FeedError, "Could not find google profile for #{email}"
  end
  if profile_url = doc.find('//XRD:Alias', 'XRD:http://docs.oasis-open.org/ns/xri/xrd-1.0').first
    self.discover_by_url profile_url.content
  else
    raise FeedError, "Could not find google profile page for #{email}"
  end
end

.discover_by_url(profile_url) ⇒ Object

Extract the feed url from the users’s google profile page



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# File 'lib/rbuzz/feed.rb', line 39

def self.discover_by_url(profile_url)
  begin
    page = open(profile_url).read
  rescue OpenURI::HTTPError => e
    if e.io.status[0] == '404'
      raise FeedError, "Could not find profile at #{profile_url}"
    end
  end
  
  if match = page.match(%r{<link rel="alternate" type="application/atom\+xml" href="([^"]+)})
    match[1]
  else
    raise FeedError, "Could not find atom feed on profile page"
  end
end

.retrieve(feed_url) ⇒ Object 



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# File 'lib/rbuzz/feed.rb', line 12

def self.retrieve(feed_url)
  feed = Feed.new(feed_url)
  feed.fetch
  feed
end

Instance Method Details

#entries ⇒ Object

Retrieve the entries in the buzz atom feed as an array of FeedEntry objects This will fetch the feed if it has not already been fetched



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# File 'lib/rbuzz/feed.rb', line 63

def entries
  return @feed_entries if @feed_entries
  fetch if @atom_feed.nil?
  @feed_entries = @atom_feed.entries.collect {|e| FeedEntry.new(e) }
end

#fetch ⇒ Object

Retrieve and parse the buzz atom feed



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# File 'lib/rbuzz/feed.rb', line 56

def fetch
  @feed_entries = nil
  @atom_feed = Atom::Feed.load_feed(URI.parse(@feed_url))
end