Class: Feedalizer::Feed

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

Constant Summary collapse

IDENTIFIER = 
"Feedalizer/#{Feedalizer::VERSION} (https://github.com/michaelrigart/feedalizer)"

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(url, &block) ⇒ Feed

Returns a new instance of Feed.



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# File 'lib/feedalizer.rb', line 12

def initialize(url, &block)
  @page = grab_page(url)
  @rss = RSS::Maker::RSS20.new

  feed.generator = IDENTIFIER
  feed.link = url
  feed.description = "Scraped from #{url}"

  instance_eval(&block) if block
end

Instance Attribute Details

#page ⇒ Object (readonly)

Returns the value of attribute page.



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# File 'lib/feedalizer.rb', line 10

def page
  @page
end

Instance Method Details

#debug! ⇒ Object 



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# File 'lib/feedalizer.rb', line 48

def debug!
  @rss.items.each do |item|
    STDERR.puts [item.title, item.date, item.link].join('; ')
  end
end

#feed ⇒ Object 



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# File 'lib/feedalizer.rb', line 23

def feed
  @rss.channel
end

#grab_page(url) ⇒ Object 



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# File 'lib/feedalizer.rb', line 36

def grab_page(url)
  open(url) { |io| Oga.parse_html(io) }
end

#output ⇒ Object 



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# File 'lib/feedalizer.rb', line 40

def output
  @rss.to_feed.to_s
end

#output!(target = STDOUT) ⇒ Object 



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# File 'lib/feedalizer.rb', line 44

def output!(target = STDOUT)
  target << output
end

#scrape_items(query, limit = 15) ⇒ Object 



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# File 'lib/feedalizer.rb', line 27

def scrape_items(query, limit = 15)
  elements = @page.xpath(query)

  elements.first(limit).each do |html_element|
    rss_item = @rss.items.new_item
    yield rss_item, html_element
  end
end